Programming Concepts with Karel

Which control structure is best suited for repeating a block of code a fixed number of times?

• While loop

• For loop

• If statement

• If-else statement

What is the difference between turnLeft() and turnRight() commands in Karel?

• turnLeft() rotates Karel 90 degrees clockwise, while turnRight() rotates Karel 90 degrees counter-clockwise.

• turnLeft() rotates Karel 90 degrees counter-clockwise, while turnRight() rotates Karel 90 degrees clockwise.

• turnLeft() moves Karel one step to the left, while turnRight() moves Karel one step to the right.

• Both commands achieve the same result, rotating Karel 90 degrees.

Fill in the blank: The command turnRight() rotates Karel 90 degrees _______.

• clockwise

• counter-clockwise

Fill in the blank: The _______ command is used to rotate Karel 90 degrees clockwise.

• move()

• putBall()

• turnLeft()

• turnRight()

What is the corrected version of the loop: 'for (var i = 0, i < 4, i++) { move(); }'?

• for (var i = 0; i < 4; i++) { move(); }

• for (var i = 0; i < 4; i--) { move(); }

• for (var i = 0; i <= 4; i++) { move(); }

• for (var i = 0; i < 3; i++) { move(); }

Complete the code: 'function turnAround() { ___; turnLeft(); }'.

• A) turnRight()

• B) move()

• C) turnLeft()

• D) stop()

What is the purpose of the 'while' loop in the simplified code?

• To repeat until a condition is false

• To execute once

• To stop immediately

• To jump over obstacles

Which of the following is a benefit of using preconditions in programming?

• They make the code harder to understand

• They ensure the program starts in a known state

• They slow down the program

• They are unnecessary.

What is the role of the 'start' function in the pseudocode?

• To end the program

• To initiate the sequence

• To pick up the ball

• To turn around

What surrounds an if/else statement?

• Quotations " "

• Curly Brackets { }

• Parenthesis ( )

• Square Brackets [ ]