1. 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");
    }
}

finished
Compiliation fails.
An AssertionError is thrown and finished is output.
An AssertionError is thrown with the message "assertion failed."

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2. 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?

Line 5
Line 6
Line 12
Line 14

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3. 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 ");
    }
}

bar
bar done
foo done
Compilation fails

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4. 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");
    }
}

finished
Compilation fails.
An AssertionError is thrown.
An AssertionError is thrown and finished is output.

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5. 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?

Line 11
Line 12
Line 14
Line 22

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Java- Assertions Question and Answer

Java- Assertions Question and Answer

Java Programming