Computer Programming in Python Review

Which of the following is the correct way to define a turn_right function in Karel?

• 
• 
• 
• 

hich of the following is not a valid condition to go in an if statement for Karel?

• balls_present()

• front_is_clear()

• left_is_blocked()

• turn_left()

In the following code from the Cleanup Karel example, what is the purpose of If Statement #2?

• To move the last time

• To pick up the ball that is in the last spot

• To pick up the ball that is in the last spot, if there is one

• To take the ball from all of the positions that have a ball on them

What makes the following command an invalid Karel command?

turn_Left()

• It should end in semicolon

• The L should be a lower l

• It should start with a capital T

• This command is correct

What is wrong with this for loop?

for i in range = 5;

move()

A. The for loop uses a semicolon(;) instead of colon(:)

B. It should say range(5) instead of range = 5

• A

• B

• Both A and B

• Neither A or B

If Karel starts at Street 1 and Avenue 1, facing East, where will Karel be, and what direction will Karel be facing after running the following code? (Assume the world is 10x10 in size)

• Street 3, Avenue 1, Facing North

• Street 1, Avenue 4, Facing North

• Street 1, Avenue 3, Facing South

• Street 1, Avenue 3, Facing North

Karel starts at Street 1, Avenue 1, facing East in a 5x5 world. What will happen after this code runs?

• Karel will end on Street 1, Avenue 2

• Karel will end on Street 1, Avenue 7

• This code won’t run because of a syntax error

• Karel will crash into a wall

What is the purpose of using a for loop in code?

• To do something if a condition is true

• To do something while a condition is true

• To repeat something a fixed number of times

• To make programs run faster

What does the mystery function do?

• Karel moves until it is on a ball

• Karel moves once if there is no ball present

• Karel moves until it puts down a ball

• Karel checks if there is no ball on the current spot and then moves once

Karel starts at Street 1 and Avenue 1, facing East. After calling the stair_step function twice, where will Karel be and what direction will Karel be facing? (assume this is a SuperKarel program and the world is 10x10 in size)

• Street 2, Avenue 2, Facing North

• Street 3, Avenue 3, Facing East

• Street 3, Avenue 3, Facing West

• Street 4, Avenue 4, Facing East