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programming languages Online Quiz - 300

Description: programming languages Online Quiz - 300
Number of Questions: 20
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Tags: programming languages
Attempted 0/20 Correct 0 Score 0

byte b; final int a = 10; final int x = a; b = x; System.out.println("The value of b is " + b);

  1. Compilation error

  2. Runtime Error

  3. 10

  4. None of these


Correct Option: C

Which one is not correct A. x = = Float.NaN B. Float.isNan(x); C. Myobject .equals(float.NaN);

  1. A

  2. B

  3. Both

  4. None of these


Correct Option: B

What will happen when you attempt to compile and run the following code? (Assume that the code is compiled and run with assertions enabled.) public class AssertTest { public void methodA(int i) { assert i >= 0 : methodB(); System.out.println(i); } public void methodB() { System.out.println("The value must not be negative"); } public static void main(String args[]) { AssertTest test = new AssertTest(); test.methodA(-10); } }

  1. It will print -10

  2. It will result in Assertion Error showing the message -"The value must not be negative".

  3. The code will not compile.

  4. None of these.


Correct Option: C

What will happen when you attempt to compile and run the following code? interface MyInterface { } public class MyInstanceTest implements MyInterface { static String s; public static void main(String args[]) { MyInstanceTest t = new MyInstanceTest(); if(t instanceof MyInterface) { System.out.println("I am true interface"); } else { System.out.println("I am false interface"); } if(s instanceof String) { System.out.println("I am true String"); } else { System.out.println("I am false String"); } } }

  1. Prints : "I am false interface" followed by " I am false String"

  2. Prints : "I am true interface" followed by " I am true String"

  3. Prints : "I am true interface" followed by " I am false String"

  4. Compile-time error


Correct Option: C

What results from attempting to compile and run the following code? public class Ternary { public static void main(String args[]) { int a = 5; System.out.println("Value is - " + ((a < 5) ? 9.9 : 9)); } }

  1. prints: Value is - 9

  2. prints: Value is - 5

  3. Compilation error

  4. None of these


Correct Option: D

Given the following code, what will be the output? class Value { public int i = 15; } public class Test { public static void main(String argv[]) { Test t = new Test(); t.first(); } public void first() { int i = 5; Value v = new Value(); v.i = 25; second(v, i); System.out.println(v.i); } public void second(Value v, int i) { i = 0; v.i = 20; Value val = new Value(); v = val; System.out.println(v.i + " " + i); } }

  1. 15 0 20

  2. 15 0 15

  3. 20 0 20

  4. 0 15 20


Correct Option: A

What will be the result of executing the following code? // Filename; SuperclassX.java package packageX; public class SuperclassX { protected void superclassMethodX() { } int superclassVarX; } // Filename SubclassY.java 1. package packageX.packageY; 2. 3. public class SubclassY extends SuperclassX 4. { 5. SuperclassX objX = new SubclassY(); 6. SubclassY objY = new SubclassY(); 7. void subclassMethodY() 8. { 9. objY.superclassMethodX(); 10. int i; 11. i = objY.superclassVarX; 12. } 13. }

  1. Compilation error at line 5

  2. Compilation error at line 9

  3. Runtime exception at line 11

  4. None of these


Correct Option: D

A ____________is a collection that associates a key object with a value object.

  1. Array

  2. List

  3. Map

  4. Vector


Correct Option: C
  1. serialization support

  2. platform independent

  3. object diagnostic output

  4. run-time class information


Correct Option: A,C,D

The MFC library implements a Windows menu, from the Win32’s HMENU class, through the CMenu class

  1. True

  2. False


Correct Option: A

An application built on the framework can have multiple objects of a class derived from CWinApp.

  1. True

  2. False


Correct Option: B
  1. afxdlg.h header file.

  2. afxdlgs.h header file

  3. afxprp.h header file

  4. afxproppg.h header file


Correct Option: B

The framework uses ____________ to connect messages and commands to their handler functions.

  1. MapHandler

  2. CommandMaps

  3. HandleCommands

  4. Message maps


Correct Option: D
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