a) Package defines a namespace in which classes are stored. B. D. Runtime error. It also refers to a programming bug or issue that occurs when the thread scheduler swaps the threads at any time between the process. D. IOException. Which of the following are keywords in Java. B. int myArray [] [] = {1,2,3,4}; For a complete explanation, read JDK, JRE, and JVM. One of the important properties of a package is that all classes defined inside a package is accessible by code outside that package.IV. The first import statement imports all the classes and interfaces of java.awt package. What is the output of following program? A. **Correct Answer: C Double IV. How Long Does It Take to Learn Coding Skills? Q. 15) Which of the following for loop declaration is not valid? Wed like to help. For example, new Employee();. Answer: (d) A will be printed, and then an exception is thrown. String is immutable E. String is case sensitive in Java. (a) EBCDIC (b) Unicode (c) ASCII (d) Binary (e) BCD. System.out.println( puzzel of 6 is = + f.puzzel(6)); Which of the following will be the output of the above program? D. We cant extend Final classes in java. So s1 and s2 will have reference to the same String in the pool whereas s3 will be a different object outside the pool, hence the output. Here Coding compiler sharing a list of 60 core java and advanced java multiple choice questions and answers for freshers and experienced. The program compiles and prints y is 2 when executed. The value of count will be increased till 14 because of the while (count<=15) statement. Click to reveal Explanation: Anonymous inner classes are the same as the local classes except that they don't have any name. A. true true What is the initial quantity of the ArrayList list? I request to put more questions on String. The execution of Java applications begins at method main. (a) a subclass of the same package (b) a non-subclass of the same package(c) a non-subclass of different package (d) a subclass of different package(e) the same class. LOL , at first question , answer is wrong The correct will be int[] array={1,2,3}; Not int array[] = {1,2,3}; The JRE includes the JVM, which is what actually interprets the byte code and runs your program. Oracle and SAP ERP software suites which one is better for your career? The result is a negative integer if this String object lexicographically precedes the argument string. A. Explanation: While you can suggest to the JVM that it might want to run a garbage collection cycle, the JVM is free to ignore your suggestion. Explanation: The InterruptedException is thrown when a thread is waiting, sleeping, or occupied. Which statement about a valid .java file is true? **Correct Answer: A Thanks for the quiz. B. true false D.String is thread-safe in Java. Since meal>6 is false, tip is evaluated and ++tip is skipped. The notifyAll() method is similar to the notify() method, except that it wakes up all the threads that are waiting on the object's monitor. The program compiles and runs generating an output of test. a) Integer b) Boolean c) Characters d) Double View Answer 2. package main; class T { int t = 20; } class Main { public static void main (String args []) { T t1 = new T (); System.out.println (t1.t); } } Java Constructors 50 Java Language MCQs with Answers Discuss it Question 2 Predict the output of following Java program There are 21 questions in this quiz. Java Multiple Choice Questions 33) Which of the following is not a component of Java Integrated Development Environment (IDE)? Spring supports tight coupling. Thank you for the Quiz, it was really useful. (a) Netscape navigator(b) Microsoft Internet Explorer(c) Sun Hot Java Browser(d) Applet viewer tool which comes, with the Java Development Kit. Select the four correct answers. A package statement if present must be the first statement of the program (barring any comments). Question 1 Predict the output? Answer: c. Java. Popular governments are always democratic. A. double num1, int num2 = 0; B. int num1, num2; C. int num1, num2 = 0; D. int num1 = 0, num2 = 0; A. double num1, int num2 = 0; Explanation: A. Explanation: The initial or default quantity of an ArrayList is 10. According to the IEEE Standard for Floating-Point Arithmetic (IEEE 754), if we divide 1/0 will give positive infinity, -1/0 will give negative infinity, and 0/0 will give NaN. A class declared as final can be extended by defining a sub-class.III. A. falsetrue B. Java provides two operators to do left shift <<< and <<. (b) Any package imported in a program and not used is automatically deleted. Explanation: A. Its a tricky question and output will be false. A. The class Object defined by Java need not be a super class of all other classes. Identify the correct statement from the following: (a) Both (I) and (II) above (b) Both (III) and (IV) above(c) Both (I) and (III) above (d) Both (II) and (IV) above(e) Only (III) above. (a) The operating system periodically deletes all the java files available on the system. How many instance initializers are in this code? Select the one correct answer. C.s1 == s2 is:false Question No. What is the output of relational operators? Java Runtime Environment (JRE) contains JVM, class libraries, and other supporting files. Please read the following articles to learn more about the answer choices - Inheritance in Java, Multiple Inheritance in Java. Q. = Java12Quiz+7 Java Multiple Choice Questions 40) An applet cannot be viewed using. (c) May be declared private(d) Both (A) and (B) above(e) (a), (b) and (c) above. C. Runtime Error. Java Multiple Choice Questions 24) The java run time system automatically calls this method while garbage collection. Prints Str 1. please update more tricky ques. for ( int i= 99; i>=0; i= i/9). Check out our offerings for compute, storage, networking, and managed databases. Answers to questions on Language Fundamentals. Select the four correct answers. As it is an important topic, the questions related to JDBC frequently asked in Java interviews and competitive exams. B. Which of these keywords is used to make a class? C.StringBuilder was introduced in Java 1.4 We can't reassign the values of it. StringBuffer object is thread-safe because its methods are synchronized. Call System.forceGc() B.Runtime Exception Integer and String are both objects and have instance methods. C. int [] myArray = (5, 4, 3); In the above code, emp is a reference variable. 60) Which of the following statements about Java Threads is correct? If you will look at the String equals() method implementation, you will find a check usinginstanceofoperator to check if the type of passed object is String? Whereas when we create a string using double quotes, it will check for the same value as of the string in the string constant pool. It will print false because s2 is not of type String. Our 1000+ MCQs focus on all topics of the JavaScript subject, covering 100+ topics. (a) _theButton (b) $reallyBigNumber(c) 2ndName (d) CurrentWeatherStateofplanet(e) my2ndFont. The program prints pnt is NULL false false. **Correct Answer: B View Answer 2. org.hibernate.SessionFactory can manage contextual sessions and allows to retrieve them by:- getSession () method What is printed on execution of these methods? A. class argumentPassing{public static void main(String args[]){test ob = new test();int a = 15, b = 20; System.out.println(a and b before call :+ a + + b);ob.meth(a,b);System.out.println(a and b after call : + a + +b);}. Really nice ques. 1) The default value of a static integer variable of a class in Java is. C.falsefalse Instance block, method, static block, and constructor, Method, constructor, instance block, and static block, Static block, method, instance block, and constructor, Static block, instance block, constructor, and method. The objects are those variables that are created using the new operator, i.e., studentName and stud_class. like this :- 16) Which method of the Class.class is used to determine the name of a class represented by the class object as a String? Which of the following statements is correct? A. Compile-time error c)String in Java is a base class for all the other classes. However, the method here is finalizer. { Click to reveal 11 + 5 - 5 + 11 + 3 = 25. (a) int -5 (b) double -4.5(c) int -4(d) double -5.0 (e) None of the above. Tight coupling is also used in some cases, like when an object creates some other objects that are going to be used by them. The important features of the final keyword are: 24) Which of these classes are the direct subclasses of the Throwable class? You can go through the link, (https://www.javatpoint.com/java-swing) to deeply understand the class hierarchy diagram. B. Super c. As this is a a Java expression it needs to be included with <%= and . B. metalmetal ** C.StringWriter B. It leads to the poor performance or deadlock of threads. public static void main (String [] args) throws FileNotFoundException { String inputFileName = "dataIn.txt"; String outputFileName = "dataOut.txt"; File inputFile = new File (inputFileName); 12) Consider the following code fragmentRectangle r1 = new Rectangle();r1.setColor(Color.blue);Rectangle r2 = r1;r2.setColor(Color.red); After the above piece of code is executed, what are the colors of r1 andr2 (in this order)? Q. We get String with each concatenation, hence the output gets produced as shown below. (e) None of the above. Option A does not compile because Java does not allow declaring different types as part of the same declaration. C. char and int 50) In object-oriented programming, the process by which one object acquires the properties of another object is called. D. false false. (c) An interface can implement another interface. Since int is a primitive, you cannot call instance methods on it. Examples of marker interfaces are Cloneable, Serializable, ThreadSafe, and Remote interface. **Correct Answer: D d. Instance variable of type int and String are initialized to 0 and null respectively. C. Test@7fh2bd8 (Object class toString() method is being called). One of the major factors of not using pointers in Java is security concerns. Prints 10 Select the three correct answers. All rights reserved. It will print JAVA because the argument inside the println() method is an assignment. programs that are compiled to the Java bytecode. The getClass() method of the Object class returns the runtime class of this object. Which of the following statements are true about String in java? When we define a variable in a local scope with a variable name same as the name of a variable defined in an instance scope. 4-4 Thread-safe means that the methods and objects of a class are accessible by multiple threads at the same time. You did not define constructors in your 'Library' class, as you want to use the default constructor. The extend keyword is used to extend a class in java. Q. Explanation: In Java, an exception caused by other exceptions is known as a chained exception. Select the five correct answers. Then its passed as an argument to the String new operator and another string gets created in the heap memory. 17) Consider the following class definition: public class MyClass{private int value;public void setValue(int i){ / code / }// Other methods}. Answer: (c) Map m1 = Collections.synchronizedMap(hashMap); Explanation: By default, the HashMap class is a non-synchronized collection class. Spring is heavyweight. If an import statement is present, it must appear before any class or interface definitions. Explanation: Java is a programming language that disapproves of the concept of 'multiple inheritance'. We can have multiple methods having name as main in java through method overloading. D. The code compiles but throws an exception at runtime, A. byte and char Hence both s1 and s2 are having a different reference. The Java programs executed by the JVM that makes the code portable and secure. The given statements output will be false because in java + operator precedence is more than == operator. And the rest three options are false about the anonymous inner classes as it can have both methods and objects. This work is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 4.0 International License. What is DataPower used for? C.Prints z It is already handled by the catch block for Exception. It generally consists of classes like java.lang.String, java.lang.Object, java.io.Exception, etc., and all packages and classes available in the rt.jar are known to the JVM. You will have to read all the given answers and click over the correct answer. Explanation: If two or more threads are trying to access a common resource at the same time. E. Java annotation information gets lost when class is compiled. C.NullPointerException. See, Any of the following are correct answers 06, 006, or 0006, Any of the following are correct answers 0x03, 0X03, 0X3 or 0x3, Any of the following are correct answers 0x0a, 0X0a, 0Xa, 0xa, 0x0A, 0X0A, 0XA, 0xA. Which of these are not legal identifiers. Which of the following operators can operate on a boolean variable? A. int myArray [] = {1, 3, 5}; Please include what you were doing when this page came up and the Cloudflare Ray ID found at the bottom of this page. a)Object class in Java does not have a super class. 46.101.163.117 (e) It is another name for comments written within a program. int [] myArray = (5, 4, 3); is invalid because array elements should be defined in curly braces ({}). Make your website faster and more secure. (d) The JVM checks the output of any Java program and deletes anything that doesnt make sense. How do you force garbage collection to occur at a certain point? 23) Which option is false about the final keyword? A. Compile Time Error The result is zero if the strings are equal; compareTo returns 0 exactly when the equals(Object) method would return true. C.Constable In this case, compareTo returns the difference of the two character values at position k in the two string that is, the value: In our example the abc precedes def, hence negative integer is returned. Therefore clean is never output. Java Multiple Choice Questions 22) What is garbage collection in the context of Java? (a) int var; (b) int VAR; (c) int var1; (d) int var_1; (e) int 1_var;. When a subclass declares a variable with the same name as of the parent class variable. (b) Abstract methods should be implemented in the derived class. 15th question blew my mind! 48) In Java, a try block should immediately be followed by one or more .. blocks. Select the one correct answer. A. (d) A protected member of a class can be accessed from its derived class. Explanation: In the above options, strictfp is the only reserved keyword of Java. C. double num = 2.7_1_8; Read more at String vs StringBuffer vs StringBuilder. C. int num = _9_99; 15) Consider the two methods (within the same class)public static int foo(int a, String s){s = Yellow;a=a+2;return a;}public static void bar(){int a=3;String s = Blue;a = foo(a,s);System.out.println(a=+a+ s=+s);}public static void main(String args[]){bar();}. Hence s1==s2.intern() will return true. wich seems to me would give falsetrue, wich is what i choose, Hi Pls provide some finding an output type comments. If you liked the Quiz, share it with others too. B. Three reference variables and three objects are created. B.Runtime Exception Select the one correct answer. 4) Which statement is not true in java language? 6) _____ is used to find and fix bugs in the Java programs. Select the one correct answer. Global is not a reserved keyword in Java. RuntimeException and its subclasses are unchecked exceptions. Q. Answer: (c) A final class cannot extend other classes. The rt.jar is the mandatory jar file for every core java application as it contains all the core classes. C. Prints 0 C. A subclass of a non-abstract superclass can be abstract. (c) A finally block is executed whether an exception is thrown or not. Q. How many of the following methods compile? It is a non-static method, and available in the java.lang package. a) Integers b) Floating - point numbers c) Boolean d) None of the mentioned View Answer 3. From String compareTo() method documentation: compareTo method compares two strings lexicographically. Packages dont provide a mechanism to partition all class names into more manageable chunks.II. Thats just a normal method that doesnt get called automatically. Explanation: In the above code, we have declared count = 1. If you are not sure about the answer then you can check the answer using Show Answer button. (a) Assembler language (b) Byte code(c) Bit code (d) Machine code(e) Platform dependent code. 3) What should be the execution order, if a class has a method, static block, instance block, and constructor, as shown below? Select the one correct answer. 8) What is the output of the following program: public class testmeth{static int i = 1;public static void main(String args[]){System.out.println(i+ , );m(i);System.out.println(i);}public void m(int i){i += 2;}}. Explanation: The Javadoc is a tool that is used to generate API documentation in HTML format from the Java source files. 49) In character stream I/O, a single read/write operation performs _____. D. Hence, an asterisk (***) will be printed eight times, and plus (+++++) will be printed seven times. C.truetrue (a) Copy of that object (b) Method called call by value(c) Memory address (d) Constructor(e) Default constructor. C.toLower() C. play-clean-play- Then the code would execute. The last question was the final nail in the coffin. The CallableStatement can return either a single ResultSet object or multiple ResultSet objects. We cant extend String class because its final. 20. Please mail your requirement at [emailprotected]. Javadoc [options] [packagenames] [sourcefiles] [@files]. in question 4 i have copy your code and getting out is c = A i have selected that option only but it says wrong option. Then its all + operators, so they get executed from left to right. How many bytes are used to represent the primitive data type int in Java. 26) In which memory a String is stored, when we create a string using new operator? Java Multiple Choice Questions 39) Consider the following Java program : class IfStatement{public static void main(String args[]){int a=2, b=3;if (a==3)if (b==3)System.out.println(===============);elseSystem.out.println(#################);System.out.println(&&&&&&&&&&&);}}. So I have gathered some great and tricky java string quiz questions that you should try. Your IP: (Notice the integer division)-4 + 1/2 + 2*-3 + 5.0. Why did this Budget Day see 30%-50% Signups to Crypto Exchanges. B. int num1, num2; Which of the following are valid declarations for the main method. Explanation: A char literal may contain a Unicode character (UTF-16). You can check the answer and detailed explanation by clicking on the Reveal Answer button after each question. D. You can store a primitive directly into an ArrayList. Wed like to help. Hence, the "o" and "e" are replaced by the characters "i" and "d," respectively, which results in "Cimpletd.". In other words, an empty interface (contains nothing) is known as the marker interface. So, the values of i will not be printed, and the above exception is thrown. It will throw the runtime exception.Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 16 Its because the index value starts from 0. In statement 2, first of all abcd is created in the string pool. I hope you liked the Core Java Quiz. final static public void main (String args[]); public static abstract void main(String args[]); What happens when the following program is compiled and executed with the command java test. **Correct Answer: B Answer: (a) Two bytes read/write at a time. Which of the following statements are true about annotations in java? Explanation: A marker interface is an interface with no fields and methods. D. Runtime error because Foo.x is final. (a) Interpreter (b) Destructor (c) Constructor (d) Object (e) Compiler. 56) Consider the following statement(s) about Java: I. Hence, the correct answer is the option (b). The JRE (Java Runtime Environment) is a part of JDK that contains the Java class libraries, Java class loader, and the Java Virtual Machine. (b) A class which is implementing an interface must implement all the methods of the interface. These java multiple choice interview questions asked in various java interview exams. This was a tricky question. B. Inheritance Duration: 1 week to 2 week. 1. While we believe that this content benefits our community, we have not yet thoroughly reviewed it. Answer: (a) It returns the existing string from the memory. 12) What will be the output of the following program? Prints 20 We hope this list of java mcq questions will help you to crack your next java mcq online test. Option A does not compile because Java does not allow declaring different types as part of the same declaration. The other three exceptions are all thrown by the JVM when the corresponding problem arises. What happens when the following program is compiled and run. ** I have tried to cover most of the important points about String in this Quiz. A. 19) Which package contains the Random class? 2023 DigitalOcean, LLC. There are several actions that could trigger this block including submitting a certain word or phrase, a SQL command or malformed data. An identifier does not begin with a digit and does not contain any spaces.IV. B. One or more additional 'u' characters that are optional. You can call methods on a primitive. If found, then it returns the reference else it creates a new String in the pool and then returns the reference. 39) Which of the following is a mutable class in java? This was a tricky question. Using the final keyword with a variable makes it constant or immutable. It contains an abstract method named num() that is not defined properly. Select the four correct answers. What is the function of the word "break" in Java? A. Bootstrap Class Loader Are you sure you want to create this branch? I. Explanation: In the above code, there are three reference variables and two objects. The .class files for classes declared to be part of a package can be stored in multiple directories. By default, any field of the interface is public, static, and final. Tricky! Which of the following declarations does not compile? 41) What is meant by the classes and objects that dependents on each other? The program compiles and runs but does not print anything. For positive numbers, result of operators >> and >>> are same. ** So the given expression will be evaluated to s1 == s2 is:abc == abc i.e false. A. Java3Quiz7 Explanation: Type mismatch: cannot convert from double to float. Which of the following statements is correct? (e) None of the above. If it is found, returns a reference of it else create a new string in the string constant pool. String is one of the most important classes in Java. The string is very popular when it comes to java interview questions or quiz. Cloudflare Ray ID: 7d20de2418a335fd Question 4 is too tricky from my perspective and I wouldnt agree that in question 3 String is final is invalid choice, because otherwise you could extend String and override hashcode, equals then pollute collections with unsafe ChildStrings and everything will be broken, benefits of String immutability are lost in this situation. Java Multiple Choice Questions 34) Identify, from among the following, the incorrect variable name(s). You can extend multiple classes in java. To create a list of 3 visible items along with the multiple selections abled, we have to use the following constructor of the List class. B.String is allowed in switch case for Java 1.7 or higher versions. Java Multiple Choice Questions 26) An overloaded method consists of. Work with a partner to get up and running in the cloud, or become a partner. String V. Array. Whereas, the second import statement only imports the Object class of the java.lang package. It is used to tell the JVM or compiler that the particular class has special behavior. So it returns the reference of s1. (a) gender = 1, age = 60 (b) gender = 1, age = 50(c) gender = 1, age = 65 (d) gender = 0, age = 70(e) gender = 0, age = 55. A Java standalone application always starts with a single thread known as the main thread that is associated with the main() method. For example, \w+ matches one or more word character that is same as ([a-zA-Z_0-9] +). The studentId is only a reference variable as it is not declared using the new operator. But a final class can extend other classes. If they have different characters at one or more index positions, let k be the smallest such index; then the string whose character at position k has the smaller value, as determined by using the < operator lexicographically precedes the other string. A. int myArray [] [] = {1,2,3,4}; is invalid because myArray is a two-dimensional array whereas in this case its being defined as a one-dimensional array. When s2.intern() method is called, it checks if there is any string with value abc in the pool. Here Coding compiler sharing a list of 60 core java and advanced java multiple choice questions and answers for freshers and experienced. 15 Best Companies for Software Engineers in India. B.String class is defined in java.util package. Answer: (a) Bytecode is executed by the JVM. Following is the code snippet of a maker interface: 22) Which of the following is an immediate subclass of the Panel class? **Correct Answer: D Following quiz provides Multiple Choice Questions (MCQs) related to JDBC Framework. D. StringIndexOutOfBoundsExceptionCompile-time error. A four hexadecimal digits (a character from 0 - 9 or a-f or A-F). B. We can modify the internal state and fields of a mutable class. The option b, c, and d, are not valid because: 8) What is the return type of the hashCode() method in the Object class? Similarly, there are two values of variable b, i.e., 5 and 30. (a) 0 (b) ab + cd(c) 0(d) Both (A) and (B) above (e) (A), (B) and (C) above. ** All other primitives have the same name. Hence, the correct answer is an option (d). = Java+1+2+Quiz++7 A. Compile-time error Q. (a) Protected (b) Final (c) Public (d) Private (e) Static. D.true. Is there any short cut or trick to remember all methods or interfaces as list is too huge and not easy to remember all those as asked in some questions in the quiz? Exception in thread "main" java.lang.Error: Unresolved compilation problem: The s1 is in the string pool whereas s2 is created in heap memory. The char values range is from u0000 to uffff. 4-0 Q. The String is a final class, so you cant extend it. 6) Which one of the following is not true? Which of the following statements are correct. (a) Binding (b) Transferring (c) Hiding (d) Coupling (e) extending. String class is defined injava.langpackage.The string is immutable and hence thread-safe in java. In other words, the intern() method returns a reference of the string. A. C.ClassCastException at runtime ** The correct statement will be: (b) A finally block is executed, only after the catch block is executed. B. 12. Java Multiple Choice Questions 35) Use the following declaration and initialization to evaluate the Java expressions. Valid methods of String class are - trim(), intern(), toLowerCase(), and split(String regex). It exits the current loop or case statement. ** DigitalOcean makes it simple to launch in the cloud and scale up as you grow whether youre running one virtual machine or ten thousand. 2. The width in bits of double primitive type in Java is . (a) Data representation, classes (b) Database, operations(c) Data representation, objects (d) Control structure, operations(e) Data representation, operations. b) A package can contain other package within it. Explanation: For every long literal to be recognized by Java, we need to add L character at the end of the expression. Work with a partner to get up and running in the cloud, or become a partner. A. We can extend String class like StringBuffer does it. The package keyword is used to create a new package. 14) What is printed by the following statement?System.out.print(Hello,\nworld!); (a) Hello, \nworld! Select the one correct answer. A Java file without any class or interface definitions can also be compiled. C.String properly implements hashCode() and equals() method What is true of the finalize() method? Y cannot be resolved to a variable. If you think I have missed some important areas, let me know and I will add some more tricky quiz questions here. (a) 1 , 3 (b) 3 , 1 (c) 1 , 1 (d) 1 , 0 (e) none of the above. It means when we create an ArrayList without specifying any quantity, it will be created with the default capacity, i.e., 10. 43) Which of the following code segment would execute the stored procedure "getPassword()" located in a database server? Q. We can have static block in a class. A. (c)(d) Hello, \nworld! (e) None of the above. A. B. int num = 9_9_9; Answer: (a) Three reference variables and two objects are created. Q. For example. ** If you have any suggestions for improvements, please let us know by clicking the report an issue button at the bottom of the tutorial. Hence, there are three reference variables and two objects. Developed by JavaTpoint. 17. Q. D. System Class Loader, A. Test toString called 9) Which of the following is a valid long literal? 41) What would the output be of the above Program III before and after it is called? D. play-play-clean-clean-. Which is correct about an instance variable of type String? Java Multiple Choice Questions 23) You read the following statement in a Java program that compiles and executes.submarine.dive(depth); (a) depth must be an int(b) dive must be a method. B.falsefalse It helps in identifying the cause of the exception. However, it is guaranteed to be called no more than once. d) A package can be renamed without renaming the directory in which the classes are stored. oracle:thin:localhost@dfot/dfot:1521/xepdb1 jdbc::oracle-thin:dfot/dfot@oracle:1521/xepdb1 jdbc:oracle:thin:dfot/dfot@localhost:1521/xepdb1 (*) (b) int is the name of a class available in the package java.lang(c) Instance variable names may only contain letters and digits. The initial value of an instance variable of type String that is not explicitly initialized in the program is . So the given expression will be evaluated to s1 == s2 is:abc == abc i.e false. Show Answer Workspace 3) What should be the execution order, if a class has a method, static block, instance block, and constructor, as shown below? This work is licensed under a Creative Commons Attribution-NonCommercial- ShareAlike 4.0 International License. B.null followed by NullPointerException x.concat(y); will create a new string but its not assigned to x, so the value of x is not changed. }. But on dividing an integer by zero, it throws a runtime exception, i.e., java.lang.ArithmeticException. What all gets printed on the standard output when the class below is compiled and executed by entering java test lets see what happens. Explanation: Following are some rules for declaring an abstract method: In the above code, MyFirstClass is an abstract class. D. None of the above; they all compile, Explanation: Underscores are allowed between any two digits in a numeric literal. The JDK (Java Development Kit) is a software development environment used to develop Java applications and applets. Save my name, email, and website in this browser for the next time I comment. (a) true (b) false (c) 0 (d) 1 (e) Hello. Explanation: java.io.IOException is thrown by many methods in the java.io package, but it is always thrown programmatically. Java Multiple Choice Questions 31) Mark the incorrect statement from the following: (a) Java is a fully object oriented language with strong support for proper software engineering techniques(b) In java it is not easy to write C-like so called procedural programs(c) In java language objects have to be manipulated(d) In java language error processing is built into the language(e) Java is not a language for internet programming. A. RuntimeException Correct Answer: C, D, E Explanation: In the above code, there are two values of variable a, i.e., 10 and 60. Answer: (c) notify(), notifyAll(), and wait(). , ThreadSafe, and then returns the existing String from the Java.... ) my2ndFont from left to right the while ( count < =15 ).... Each question return either a single thread known as a chained exception runs generating an output type comments understand class. And which of the following statements is correct java returns the reference pool and then returns the existing String from the memory package keyword used... Can operate on a boolean variable Java12Quiz+7 Java Multiple Choice questions and answers for freshers experienced. Other words, an empty interface ( contains nothing ) is known as the classes! Be the first import statement is not valid - point numbers c ) 2ndName d... Other words, an exception is thrown when a subclass declares a variable makes it constant immutable! Topic, the second import statement is not a component of Java for classes declared to be called more. Or occupied a-zA-Z_0-9 ] + ) method documentation: compareTo method compares strings! And final 9 ) which of the same time can implement another interface ( [ a-zA-Z_0-9 ] )! Defines a namespace in which the classes are stored + 2 * +... Are accessible by Multiple threads at the end of the important features the... Operate on a boolean variable an assignment licensed under a Creative Commons Attribution-NonCommercial- 4.0. And output will be the output of any Java program and not used automatically! The standard output when the following statements are true about String in this browser for the quiz share. Same declaration methods having name as main in Java 14 ) What is function! Compareto ( ) method is an option ( d ) the operating system periodically deletes all Java. And final special behavior method overloading bits of double primitive type in Java [ ] [ ] =... Mcqs focus on all topics of the while ( count < =15 statement. 0 ( d ) object ( e ) BCD digit and does not print.... The first import statement only imports the object class in Java is any class or interface definitions can be. Partner to get up and running in the pool and then returns the existing String from the.! About annotations in Java is a primitive directly into an ArrayList without specifying any quantity, it will false...: Anonymous inner classes are the same name as main in Java extend a class must implement all given. The JDK ( Java Development Kit ) is known as a chained exception it else create a String using operator! Add some more tricky quiz questions here of the word & quot ; in Java does not because... What happens when the class object defined by Java need not be printed, and then an exception caused other. Or issue that occurs when the thread scheduler swaps the threads at any time between the process by one... S ) about Java threads is correct about an instance variable of a package can contain package... Program and not used is automatically deleted you can go through the,... @ files ] to Java interview exams dividing an integer by zero, it if... = { 1,2,3,4 } ; for a complete explanation, read JDK, JRE, and returns. Libraries, and then returns the reference 3 ) ; in the pool declaration is true! Https: //www.javatpoint.com/java-swing ) to deeply understand the class below is compiled function the... Abc == abc i.e false statement? System.out.print ( Hello, \nworld ; for a explanation... Cloneable, Serializable, ThreadSafe, and final Destructor ( c ) public d... That doesnt get called automatically runtime class of the ArrayList list offerings for compute, storage networking! Initialized to 0 and null respectively so you cant extend it strings lexicographically checks the output of Java. The char values range is from u0000 to uffff b, i.e., 5 30! Loader which of the following statements is correct java you sure you want to create a new package field of following! The directory in which the classes are the same declaration 20 we this. Java.Io.Ioexception is thrown or not make a class find and fix bugs in heap. Given answers and click over the correct answer: ( c ) a protected member a! Should try, email, and Remote interface checks the output of test Learn more about the answer you! 7Fh2Bd8 ( object class toString ( ) method documentation: compareTo method two. Output type comments be increased till 14 because of the following is an important topic, the intern ( method! Variable of a non-abstract superclass can be accessed from its derived class performance or deadlock of threads new.! ) package defines a namespace in which classes are the direct subclasses of program. Java interview questions asked in various Java interview exams String with each,... It with others too before and after it is an option ( b ) a protected of..... blocks to read all the given expression will be printed, and JVM Java3Quiz7 explanation: if or! Variable as it can have both methods and objects since meal > 6 is false, tip is and. Two bytes read/write at a certain point and then an exception is thrown a. * correct answer: ( c ) notify ( ), and website in this quiz,!! Any Java program and deletes anything that doesnt get called automatically count will evaluated. Inside the println ( ) method documentation: compareTo method compares two strings lexicographically returns. And objects member of a package can be abstract you which of the following statements is correct java check the answer choices - Inheritance in?... Not contain any spaces.IV component of Java really useful a valid.java file is of. A partner Choice interview questions asked in Java is + 5.0 believe that this content benefits community... And website in this browser for the quiz statement? System.out.print (,... Not print anything ( c ) 0 ( d ) + 11 + 5 - 5 + 11 + =. Java expressions class toString ( ) B.Runtime exception integer and String are initialized to 0 and null respectively:! You can check the answer using Show answer button after each question click over the correct answer (. Command or malformed data Inheritance in Java through method overloading code would.... Was introduced in Java, Multiple Inheritance in Java, a try block should immediately be by. Calls this method while garbage collection in the cloud, or become a partner or more word character is., i.e., studentName and stud_class given answers and click over the correct answer: b answer (! Packages dont provide a mechanism to partition all class names into more manageable chunks.II returns a reference the... New package used to create this branch segment would execute the stored procedure `` getPassword ( ) method of JavaScript... About an instance variable of type String else it creates a new package output type comments link, (:! Switch case for Java 1.7 or higher versions + 11 + 3 25... About an instance variable of a package can be abstract int 50 ) in Java 1.4 ca. Means when we create an ArrayList without specifying any quantity, it is declared... String with each concatenation, hence the output gets produced as shown below Notice integer! Store a primitive directly into an ArrayList is 10 method returns a reference variable as it is declared! Expression it needs to be included with & lt ; % =.!: if two or more.. blocks answer using Show answer button )... Have Multiple methods having name as main in Java the program is part a! Quiz provides Multiple Choice questions and answers for freshers and experienced a finally block is executed whether exception... Application as it is used to develop Java applications and applets method that doesnt make sense c.... ( contains nothing ) is known as a chained exception, explanation: in the String operator! An import statement only imports the object class returns the reference not extend other classes, Serializable,,... Choose, Hi Pls provide some finding an output type comments are two values of I will add more. To extend a class declared as final can be stored in Multiple directories c. play-clean-play- then the code portable secure. Answer is the function of the following statement? System.out.print ( Hello, \nworld String is very when. Studentid is only a reference of the program compiles and runs but does not compile because Java does allow. An interface can implement another interface Private ( e ) Hello then it returns the reference else it creates new. Acquires the properties of another object is called, it checks if there is any String with value in... Of all other primitives have the same declaration if this String object lexicographically precedes the argument String Floating... Questions 33 ) which of the interface is an immediate subclass of the same declaration variable! Is security concerns and does not print anything of I will add some more tricky quiz questions that you try. The internal state and fields of a class in Java generating an output type comments store a primitive into! The option ( b ) any package imported in a numeric literal this of... Constructor ( d ) Hello, \nworld ArrayList without specifying any quantity, it was really.... To crack your next Java mcq online test, java.lang.ArithmeticException interface is an immediate subclass a... You will have to read all the methods of the Throwable class core and. Because in Java type String objects that dependents on each other issue that when. Explanation, read JDK, JRE, and available in the pool, and! Main thread that is used to make a class are accessible by outside.
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