PRE TEST (KAREL COMMANDS)

Which of these is a valid Karel command?

• MOVE

• move;

• move()

• move();

Answer explanation

The correct answer is:

move( );

What is a street in a Karel world?

• A row

• A column

• A single point

• Karel’s position

Answer explanation

A "street" in karel's grid world refers to a "row".

What is an avenue in a Karel world?

• A row

• A column

• A single point

• Karel’s position

Answer explanation

Correct! An avenue is a column.

If Karel is facing North and the code

turnLeft();

turnLeft();

runs; which direction is Karel facing now?

• North

• South

• East

• West

Answer explanation

Great job! After the first command, Karel will face West and after the second command Karel will face South.

How many times should Karel turn left in order to turn right?

• 1

• 2

• 3

• 4

Answer explanation

Great!

What can be used to teach Karel to turn right?

• Functions

• Variables

• Dog treats

• Karel can already turn right

Answer explanation

Well done!

How many times should the start function be defined in a program?

• 1

• 2

• 3

• However many you like

Answer explanation

Great!

Why do we use the start function?

• The start function makes it easier to read and understand our programs.

• The start function sets the correct starting position for Karel.

• The start function makes it easier for Karel to avoid running into the walls.

• The start function makes our programs run faster and more efficiently.

Answer explanation

Correct! The start function helps tell the story of our program by putting all of the main commands in one place.

Why do we use functions in programming?

• Break down our program into smaller parts

• Avoid repeating code

• Make our program more readable

• All of the above

Answer explanation

Great job!

What is a code comment?

• A way to teach Karel a new word

• A way to give notes to the reader to explain what your code is doing

• A message to your teacher in code

• A place to write whatever you want in your code

Answer explanation

Correct!