Important Notice:

Practice-It will be discontinued as of November 1st, 2024. After this date, the website will remain online for a transitional period, but login will be restricted to University of Washington NetID authentication. This marks the next phase towards the platform's full retirement. Thank you for your use and support of the application over the years.

If you are looking for an alternative, a similar tool, CodeStepByStep, was developed independently by the original author of Practice-It, and is available at codestepbystep.com**

logo Practice-It logo

Main Page → Problems → Solve a Problem

assertions

Language/Type: Java assertions
Author: Roy McElmurry (on 2010/12/28)

You will identify various assertions as being either always true, never true or sometimes true/sometimes false at various points in program execution. The comments in the method below indicate the points of interest. 

public static int assertionMystery(Scanner console) { 
    int a = -1; 
    int b = 0; 
    int next = console.nextInt(); 

    // Point A
    while (next != 0) { 
        // Point B
        b = Math.max(a, next); 
        a = next; 

        // Point C
        if (a == 42) { 
            // Point D
            a++; 
        } 

        next = console.nextInt(); 
    } 

    // Point E
    return b; 
}

Fill in each box of the the table below with ALWAYS, NEVER or SOMETIMES.

next == 0 a > 0 b >= next
Point A
Point B
Point C
Point D
Point E

You must log in before you can solve this problem.


Log In

If you do not understand how to solve a problem or why your solution doesn't work, please contact your TA or instructor.
If something seems wrong with the site (errors, slow performance, incorrect problems/tests, etc.), please

Is there a problem? Contact a site administrator.