Karel Commands Quiz

Which of these is a valid Karel command?

• move

• MOVE

• move()

• move(1)

Answer explanation

The valid Karel command is 'move()' which includes parentheses to indicate a function call.

Which one of these is NOT a command that Karel knows?

• Turn Left

• Turn Right

• Move Forward

• Put Down a Ball

Answer explanation

The correct choice is 'Turn Right' because it is NOT a command that Karel knows. Karel knows how to Turn Left, Move Forward, and Put Down a Ball.

This code:

putBall();

move();

putBall();

put 2 balls in the same place and then move one place?

• True

• False

Answer explanation

The correct answer is False because the code puts two balls in the same place before moving, not moving one ball to a different place.

Karel only knows 4 commands.

• True

• False

Answer explanation

The correct answer is True because the question states that Karel only knows 4 commands, which is a true statement.

5. A grid that karel lives in.

• Define A Function

• Fencepost Problem

• World

• Karel

Answer explanation

The correct choice is 'World' because it is the grid where Karel lives in.

When is the else block executed in an if-else statement?

• A. Always 

• B. Only when the if condition is true 

• C. Only when the if condition is false 

• D. Only when there is an error

Answer explanation

The else block is executed only when the if condition is false, making option C the correct choice.

What is the function of the `if` statement in programming?

• To repeat a block of code multiple times

• To stop the execution of a program

• To execute a block of code if a specified condition is true

• To declare a variable

Answer explanation

The function of the `if` statement in programming is to execute a block of code if a specified condition is true.

We use if ... else statement when we have 2 or more conditions

• True

• False

Answer explanation

The correct choice is True because if ... else statements are used when there are multiple conditions to be evaluated.

The second part of if, that is executed when the condition is false

• if

• else

• for

• input

Answer explanation

The second part of if, that is executed when the condition is false is represented by the 'else' statement.

What is the purpose of an if statement in programming?

• A. To repeat a block of code multiple times 

• B. To execute a block of code only if a specified condition is true

• C. To exit a loop immediately 

• D. To define a function

Answer explanation

The purpose of an if statement in programming is to execute a block of code only if a specified condition is true, making option B the correct choice.