BUILDING CONSTRUCTION QUIZ

Which statements are most accurate regarding the following classes?class A{ private int i; protected int j;}class B extends A{ private int k; protected int m;}

An object of B contains data fields j, m.

An object of B contains data fields k, m.

An object of B contains data fields i, j, k, m.

An object of B contains data fields j, k, m.

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What will be the output for the below code?static public class Test{ public static void main(String[] args){ char c = 'a'; switch(c){ case 65 : System.out.println("one");break; case 'a': System.out.println("two");break; case 3 : System.out.println("three"); } }}

None of these

one

Compile error - char can't be permitted in switch statement.

two

Compile error - Illegal modifier for the class Test; only public, abstract & final are permitted.

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Suppose a class has public visibility. In this class we define a protected method. Which of the following statements is correct?

From within protected methods you do not have access to public methods.

In a class, you cannot declare methods with a lower visibility than the visibility of the class in which it is defined.

This method is only accessible from inside the class itself and from inside all subclasses.

This method is accessible from within the class itself and from within all classes defined in the same package as the class itself.

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What will be the output for the below code?public class Test{ static{ int a = 5; } public static void main(String[] args){ System.out.println(a); }}

0

None of these

5

Compile with error

Runtime Exception

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What is the result of compiling and running the following code?public class Tester{static int x = 4;int y = 9; public Tester(){System.out.print(this.x); // line 1printVariables();}public static void printVariables(){System.out.print(x); // line 2System.out.print(y); // line 3}public static void main(String... args) { // line 4new Tester();}}

Compile error at line 4 (invalid argument type for method main)

Compile error at line 3 (static methods can't make reference to non-static variables)

49

Compile error at line 1 (static x must be only accessed inside static methods)

Compile error at line 2 (must access x by writing Tester.x)

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What will be the output?public class Test{static{int a = 5;}public static void main(String args[]){new Test().call();}void call(){this.a++;System.out.print(this.a);}}

6

0

Runtime Exception

Compile with error

5

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What will be the output after the following program is compiled and executed?public class Test{ public static void main(String args[]){ int x = 10; x = myMethod(x--); System.out.print(x); } static int myMethod(final int x){ return x--; }}

The program will compile successfully and display 10 as output.

The program will lead to compilation error.

The program will lead to runtime error.

None of these

The will compile successfully and display 9 as output.

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The object is created with new keyword

Depends on the code

At Compile-time

None of these

At run-time

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What can directly access and change the value of the variable qusNo?package com.mypackage;public class Test{ private int qusNo = 100;}

None of these

Any class that extends Test.

Any class in com.mypackage package.

Only the Test class.

Any class.

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What will be the output after compiling and running following program code?public class Test{ static int a; public static void main(String[] args){ System.out.println("one"); call(1); } static void call(int a){ this.a=10; System.out.println("two "+a); }}

one two 10

Compile time error.

one two 0

one two 1

None of these

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