Assertions - Finding the output Questions and Answers

The program is run with java -ea Sketch95 - what will be the output?

public class Sketch95
{
    public static void main(String[] args)
    {
        int[] a = {4, 5, 6};
        int[] b = a.clone();
        assert a == b;
        System.out.println(b[0]);
    }
}

The program is run with java -ea Item96 - what will be the output?

public class Item96
{
    static class Base { static String who() { return "base"; } }
    static class Sub extends Base { static String who() { return "sub"; } }

    public static void main(String[] args)
    {
        assert Base.who().equals("base");
        System.out.println(Sub.who());
    }
}

The program is run with java -ea Probe98 - what will be the output?

public class Probe98
{
    public static void main(String[] args)
    {
        StringBuilder sb = new StringBuilder("level");
        assert sb.reverse().toString().equals("level");
        System.out.println(sb);
    }
}

The program is run with java -ea Demo99 - what will be the output?

public class Demo99
{
    public static void main(String[] args)
    {
        assert "abc".indexOf("d") == -1;
        System.out.println("abc".indexOf("c"));
    }
}

The program is run with java -ea Snippet100 - what will be the output?

public class Snippet100
{
    public static void main(String[] args)
    {
        long x = 5L;
        assert x / 2 == 2;
        System.out.println(x / 2);
    }
}

The program is run with java -ea Listing101 - what will be the output?

public class Listing101
{
    public static void main(String[] args)
    {
        int[] queue = new int[0];
        System.out.println("draining");
        System.exit(0);
        assert queue.length > 0 : "queue empty";
    }
}

The program is run with java -ea Fragment102 - what will be the output?

public class Fragment102
{
    public static void main(String[] args)
    {
        assert "abc".charAt(3) == 0;
        System.out.println("done");
    }
}

The program is run with java -ea Program104 - what will be the output?

public class Program104
{
    interface Limits { int MAX = 10; }

    public static void main(String[] args)
    {
        assert Limits.MAX == 10;
        System.out.println(Limits.MAX);
    }
}

The program is run with java -ea Trial105 - what will be the output?

import java.util.*;

public class Trial105
{
    public static void main(String[] args)
    {
        List<String> a = new ArrayList<String>();
        List<Integer> b = new ArrayList<Integer>();
        assert a.getClass() != b.getClass();
        System.out.println(a.getClass() == b.getClass());
    }
}

The program is run with java -ea Sketch107 - what will be the output?

public class Sketch107
{
    public static void main(String[] args)
    {
        assert Math.round(-2.5) == -3;
        System.out.println(Math.round(-2.5));
    }
}