AP CSP Standard 1 Review

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

• ballsPresent()

• frontIsClear()

• leftIsBlocked()

• putBall()

Karel is on a location with one tennis ball. After the following code runs, how many tennis balls will there be at that location?

for (var i = 0; i < 3; i++) {
if (ballsPresent()) {
takeBall();

} else {

putBall();

putBall();

}

}

• 0

• 1

• 2

• 6

Karel starts at Street 2, Avenue 1, facing East in a 5x5 world. What will happen after this code runs?

move();
putBall();
move();
move();
move();

move();

move()

• 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 condition should be used in this while loop to get Karel to pick up all the tennis balls on the current location?

while (________) {

takeBall();

• noBallsPresent()

• ballsPresent()

• frontIsClear()

• takeBall()

Why does a programmer indent their code?

• Easier for other people to understand.

• A key part of good programming style!

• Helps show the structure of the code.

• All of the above

How can we teach Karel new commands?

• Define a new function

• While loop

• For loop

• The Start function

You want to write a program to have Karel put down 300 tennis balls. Which control structure would you use?

• Nested while loop

• For loop

• While loop

• If Statement

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

move();

turnRight();

move();

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

• Karel ends on street 1, avenue 3

• Karel ends on street 2, avenue 3

• Karel will crash into a wall

How can we improve the following program?

function start() {

move();

move();

move();

move();

move();

move();

move();

move();

move();
}

• Fix the indentation of this program

• Use a while loop to repeat the move command

• Use a for loop to repeat the move command

• Break down this program into more functions

What is top down design?

• Top down design is a way to use loops and if statements to decompose the problem

• Top down design is a way of designing your programs starting with the individual commands first

• Top down design is a way that you can create designs on a computer to put on a web page

• Top down design is a way of designing your program by starting with the biggest problem and breaking it down into smaller and smaller pieces that are easier to solve.