Assertions

Q1:
public class Test2 
{
    public static int x;
    public static int foo(int y) 
    {
        return y * 2;
    }
    public static void main(String [] args) 
    {
        int z = 5;
        assert z > 0; /* Line 11 */
        assert z > 2: foo(z); /* Line 12 */
        if ( z < 7 )
            assert z > 4; /* Line 14 */

        switch (z) 
        {
            case 4: System.out.println('4 ');
            case 5: System.out.println('5 ');
            default: assert z < 10;
        }

        if ( z < 10 )
            assert z > 4: z++; /* Line 22 */
        System.out.println(z);
    }
}
which line is an example of an inappropriate use of assertions?

A Line 11

B Line 12

C Line 14

D Line 22

Q2: What will be the output of the program?
public class Test 
{  
    public static void main(String[] args) 
    { 
        int x = 0;  
        assert (x > 0) ? 'assertion failed' : 'assertion passed' ; 
        System.out.println('finished');  
    } 
}

A finished

B Compiliation fails.

C
An AssertionError is thrown and finished is output.

D An AssertionError is thrown with the message 'assertion failed.'

Q3:
public class Test 
{ 
    public void foo() 
    {
        assert false; /* Line 5 */
        assert false; /* Line 6 */
    } 
    public void bar()
    {
        while(true)
        {
            assert false; /* Line 12 */
        } 
        assert false;  /* Line 14 */
    } 
}
What causes compilation to fail?

A Line 5

B Line 6

C Line 12

D Line 14

Q4: What will be the output of the program (when you run with the -ea option) ?
public class Test 
{  
    public static void main(String[] args) 
    {
        int x = 0;  
        assert (x > 0) : 'assertion failed'; /* Line 6 */
        System.out.println('finished'); 
    } 
}

A finished

B Compilation fails.

C
An AssertionError is thrown.

D An AssertionError is thrown and finished is output.

Q5: What will be the output of the program?
public class Test 
{
    public static int y;
    public static void foo(int x) 
    {
        System.out.print('foo ');
        y = x;
    }
    public static int bar(int z) 
    {
        System.out.print('bar ');
        return y = z;
    }
    public static void main(String [] args ) 
    {
        int t = 0;
        assert t > 0 : bar(7);
        assert t > 1 : foo(8); /* Line 18 */
        System.out.println('done ');
    }
}

A bar

B bar done

C foo done

D Compilation fails


img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.