Overview

The second quiz will cover the following topics:

1. Conditional Execution

2. Iteration

The quiz will consist of definitions, short answers, translation, code evaluation, debugging, and programming sections.

Below are examples of the type of questions that may be asked on the quiz. It is meant to be representative, rather than exhaustive (ie. there may be questions that show up on the quiz that are not shown below).

Definitions

Briefly define the following terms.

1. Boolean Expression

2. Exception

3. Short Circuit Evaluation

4. Infinite Loop

Short Answer

1. What is the difference between a while loop and a for loop? Give two examples where we would prefer one over the other.

Translation

1. Convert the following Python code to use a while loop instead of a for loop:

   numbers = [5, 4, 7, 0, 1]
   count   = 0
   
   for number in numbers:
       if number:
           break
       count += 1
   

Code Evaluation

1. What is the result of the following Python code:

   for i in range(0, 10):
       if i < 4:
           continue
       elif i == 7:
           break
       else:
           print i
   print i
   

Debugging

1. The Python code below is suppose to count all of the even numbers between 1 and 100 (inclusive) that are also a multiple of 5, but it contains some errors. Identify and fix the errors:

   while i < 100:
       if i % 2 or i % 5:
           total + 1
   print total
   

Programming

1. Given a list of random integers, numbers, write Python code that computes the sum of all the numbers between a and b (inclusive) and prints the resulting total.

2. Write Python code that prints 'Yeah' if a number n is between the values a and b (inclusive). Otherwise, print 'Nope'.

3. Write Python code that generates n random numbers (between 0 and 9), counts the number of odd and even numbers, and then prints out the totals.

4. Write Python code that computes the list of the even numbers between 0 and 100 that are also a multiple of 7.

5. Write Python code that simulates rolling a die until we a get a 6 and reports how many rolls it took.