IST CodeHS Unit 7 Programming Concepts Review

What is the purpose of IF statement #1?

• If there is a ball at the current location, pick it up

• If there is no ball at the current location, put one down

• If the front is clear, move forward

• If there is a ball at the last location, pick it up

What is wrong with this Karel command? Select all that apply: Move;

• this command is correct

• it should have a lower case m

• it should have parentheses

• it should not have a semi-colon ;

What is wrong with this code? Select all that apply:

• the function name should be Start()

• the move() command is undefined

• the go() function is undefined

• the go() function is called twice in a row

How many tennis balls will Karel put down in this program?

• 4

• 5

• 6

• 0

What is the best way to define a function that turns Karel around at the same location?

• function turnAround() { turnLeft(); turnLeft(); }

• function turn() {

  turnLeft();

  turnRight(); }

• function turnAround() {

  turnRight();

  turnRight();

  turnRight(); }

• turnAround function() {

  move();

  turnLeft();

  move(); }

What is the correct way to write a single line comment in JavaScript?

• //comment

• /* this is a multi-

  * line comment

  * using JS

  */

• #comment

• this is a comment

Which of these is a valid Karel command?

• turnLeft();

• turnBack();

• goForward();

• goLeft();

What control structure should we use if we want Karel to move and turn left 8 times in a row?

• For loop

• While loop

• If statement

• Function

How should a For loop that is meant to repeat an action 10 times be written in JavaScript?

• for (var i=0; i<10; i++) { }

• for (i=0, i<10, i++) { }

• for (var i=10; i<0; i++) { }

• for (i=10, i<0, i++) { }

If Karel starts at Row 2, Column 1 facing South, where will Karel end up and what direction will she be facing after running this code?

• Karel will crash into the wall at Row 1, Column 1, Facing South

• Row 1, Column 1, Facing East

• Row 2, Column 1, Facing North

• Row 1, Column 2, Facing West