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programming languages Online Quiz - 103

Description: programming languages Online Quiz - 103
Number of Questions: 20
Created by:
Tags: programming languages
Attempted 0/20 Correct 0 Score 0

A static method can refer to any instance variable of the class.

  1. True

  2. False


Correct Option: B
  1. Windows

  2. Unix/Linux

  3. Macs

  4. All of the Above


Correct Option: D
  1. The server has a built-in JVM

  2. The browser has a built-in JVM

  3. The source code is interpreted by the browser

  4. Applets don''t need a JVM.


Correct Option: B

What is an Applet?

  1. An interactive website

  2. A Java program that is run through a web browser

  3. A type of computer

  4. A type of fruit


Correct Option: B
  1. A type of coffee

  2. An object-oriented programming language

  3. An interactive website

  4. None of the above


Correct Option: B
  1. Introducing new methods

  2. Adding components to specific areas of a container

  3. Starting an applet

  4. Specifying font size and color


Correct Option: B
  1. To avoid having to declare variables

  2. To refer to a class without using prefixes

  3. To avoid calling methods

  4. To import the images you want to use


Correct Option: B

Which of the following statements about this code are true? class A extends Thread{ public void run(){ for(int i =0; i < 2; i++){ System.out.println(i); } } } public class Test{ public static void main(String argv[]){ Test t = new Test(); t.check(new A(){}); } public void check(A a){ a.start(); } }

  1. 0 0

  2. Compilation error, class A has no start method

  3. 0 1

  4. Compilation succeed but runtime exception


Correct Option: C

What is the output for the below code ? class A implements Runnable{ public void run(){ System.out.println("run-a"); } } 1. public class Test { 2. public static void main(String... args) { 3. A a = new A(); 4. Thread t = new Thread(a); 5. t.start(); 6. t.start(); 7. } 8. }

  1. run-a

  2. run-a run-a

  3. Compilation fails with an error at line 6

  4. Compilation succeed but Runtime Exception


Correct Option: D

What is the output for the below code ? 1. public class A { 2. int add(int i, int j){ 3. return i+j; 4. } 5.} 6.public class B extends A{ 7. public static void main(String argv[]){ 8. short s = 9; 9. System.out.println(add(s,6)); 10. } 11.}

  1. Compile fail due to error on line no 2

  2. Compile fail due to error on line no 9

  3. Compile fail due to error on line no 8

  4. 15


Correct Option: B

Select correct answers

  1. The keyword extends is used to specify that an interface inherits from another interface.

  2. The keyword extends is used to specify that a class inherits from an interface.

  3. The keyword implements is used to specify that an interface inherits from another interface.

  4. The keyword implements is used to specify that a class inherits from an interface.

  5. The keyword implements is used to specify that a class inherits from another class.


Correct Option: A,D
  1. Less restrictive than public

  2. More restrictive than public, but less restrictive than protected.

  3. More restrictive than protected, but less restrictive than private.

  4. More restrictive than private.

  5. Less restrictive than protected from within a package, and more restrictive than protected from outside a package.


Correct Option: C
  1. static public void main(String[] args) { /* ... */ }

  2. public static int main(String[] args) { /* ... */ }

  3. public static void main(String args) { /* ... */ }

  4. public int main(Strings[] args, int argc) { /* ... */ }


Correct Option: A
  1. from base to the derived class

  2. from derived to base

  3. only the derived class

  4. only the base class


Correct Option: A
  1. A subclass must define all the methods from the superclass

  2. It is possible for a subclass to define a method with the same name and parameters as a method defined by the superclass.

  3. It is possible for a subclass to define a field with the same name as a field defined by the superclass.

  4. It is possible for two classes to be the superclass of each other.


Correct Option: B,C
  1. The class will fail to compile, since the class Other has not yet been declared when referenced in class AClass.

  2. The class will fail to compile, since import statements must never be at the very top of a file.

  3. The class will fail to compile, since the package declaration can never occur after an import statement.

  4. The class will fail to compile, since the class Other must be defined in a file called Other.java.

  5. The class will fail to compile, since the class Other must be declared public.


Correct Option: C
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