Karel Programming Quiz (45 minutes)

Which of the following is a valid Karel conditional?

• is_front_clear()

• front_is_clear()

• clear_is_front()

• is_clear_front()

What will happen if the code below is executed when Karel is facing a wall?

• Karel will move forward

• Karel will turn left

• Karel will not move

• Karel will crash into the wall

What is the purpose of conditionals in programming?

• To make the program run faster

• To check if certain conditions are true before executing code

• To replace loops in Karel

• To fix bugs automatically

What is the correct syntax for an if-else statement in Karel?

• A. if (condition) {code} else {code}

• B. if condition then code else code

• C. if condition: code else: code

• D.

  if condition:

  code else:

  code

Which of the following conditionals would check if Karel is NOT facing north?

• not_facing_north()

• facing_north() == False

• !facing_north()

• Both B and C are correct

How many times will the following loop execute? for i in range(5): move()

• A. 4 times

• B. 5 times

• C. 6 times

• D. Infinite times

What is the key difference between a for loop and a while loop?

• For loops can only be used with numbers, while loops can be used with any condition

• For loops repeat a fixed number of times, while loops repeat as long as a condition is true

• While loops are faster than for loops

• For loops can be nested, while loops cannot

What will the following code do? while front_is_clear(): move()

• Move Karel forward once

• Move Karel forward five times

• Move Karel forward until reaching a wall

• The code has a syntax error

What would be the correct way to make Karel place exactly 10 balls?

• for i in range(10): put_ball()

• while i < 10: put_ball()

• for i in range(9): put_ball()

• repeat(10): put_ball()

Which of the following is NOT mentioned as a common source of bugs?

• Typos in variable names

• Computer hardware failures

• Syntax errors in functions

• Valid code that isn't what you meant