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

  1. MapHandler

  2. CommandMaps

  3. HandleCommands

  4. Message maps


Correct Option: D

The CPropertyPage class is declared in which header file?

  1. afxdlg.h header file.

  2. afxdlgs.h header file

  3. afxprp.h header file

  4. afxproppg.h header file


Correct Option: B

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

  1. True

  2. False


Correct Option: B

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

  1. True

  2. False


Correct Option: A

Useful Features of CObject classes are

  1. serialization support

  2. platform independent

  3. object diagnostic output

  4. run-time class information


Correct Option: A,C,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

which class provides member functions for device-context operations, working with drawing tools, type-safe graphics device interface (GDI) object selection, and working with colors and palettes?

  1. CDOCItem

  2. CDC

  3. CBrush

  4. CAnimateCtrl


Correct Option: B

What will be output of this program? String str="TCS"; str.concat("Bangalore");

  1. TCS

  2. Bangalore

  3. TCS Bangalore

  4. Syntax Error


Correct Option: A

What is displayed when the following code is compiled and executed? String s1 = new String("Test"); String s2 = new String("Test"); if (s1==s2) System.out.println("Same"); if (s1.equals(s2)) System.out.println("Equals");

  1. Same

  2. Equals

  3. The code compiles, but nothing is displayed upon execution.

  4. The code fails to compile


Correct Option: B

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

What will be the result of executing the following code? 1. boolean a = true; 2. boolean b = false; 3. boolean c = true; 4. if (a == true) 5. if (b == true) 6. if (c == true) System.out.println("Some things are true in this world"); 7. else System.out.println("Nothing is true in this world!"); 8. else if (a && (b = c)) System.out.println("It's too confusing to tell what is true and what is false"); 9. else System.out.println("Hey this won't compile");

  1. The code won't compile

  2. "Some things are true in this world" will be printed

  3. "Hey this won't compile" will be printed

  4. None of these


Correct Option: D

What will happen when you attempt to compile and run the following code? class MyParent { int x, y; MyParent(int x, int y) { this.x = x; this.y = y; } public int addMe(int x, int y) { return this.x + x + y + this.y; } public int addMe(MyParent myPar) { return addMe(myPar.x, myPar.y); } } class MyChild extends MyParent { int z; MyChild (int x, int y, int z) { super(x,y); this.z = z; } public int addMe(int x, int y, int z) { return this.x + x + this.y + y + this.z + z; } public int addMe(MyChild myChi) { return addMe(myChi.x, myChi.y, myChi.z); } public int addMe(int x, int y) { return this.x + x + this.y + y; } } public class MySomeOne { public static void main(String args[]) { MyChild myChi = new MyChild(10, 20, 30); MyParent myPar = new MyParent(10, 20); int x = myChi.addMe(10, 20, 30); int y = myChi.addMe(myChi); int z = myPar.addMe(myPar); System.out.println(x + y + z); } }

  1. 300

  2. 240

  3. 120

  4. Compilation error


Correct Option: A

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 happen when you attempt to compile and run the following code? public class Static { static { int x = 5; } static int x,y; public static void main(String args[]) { x--; myMethod(); System.out.println(x + y + ++x); } public static void myMethod() { y = x++ + ++x; } }

  1. Compile-time error

  2. prints : 3

  3. prints : 1

  4. prints : 7


Correct Option: B

What will happen when you attempt to compile and run the following code? class MyThread extends Thread { public void run() { System.out.println("MyThread: run()"); } public void start() { System.out.println("MyThread: start()"); } } class MyRunnable implements Runnable { public void run() { System.out.println("MyRunnable: run()"); } public void start() { System.out.println("MyRunnable: start()"); } } public class MyTest { public static void main(String args[]) { MyThread myThread = new MyThread(); MyRunnable myRunnable = new MyRunnable(); Thread thread = new Thread(myRunnable); myThread.start(); thread.start(); } }

  1. Prints : MyThread: start() followed by MyRunnable:run()

  2. Prints : MyThread: run() followed by MyRunnable:start()

  3. Prints : MyThread: start() followed by MyRunnable:start()

  4. Compile time error


Correct Option: A

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

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 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

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

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
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