Comp Science U1 Review

An algorithm is a sequence of steps usually performed by a _________?

• computer

• pencil

• book

• table

Iteration is a repeating program structure, also known as a ________.

• loop

• branch

• array

• function

The FOREVER and REPEAT blocks are examples of ________ in Snap!.

• iteration

• conditionals

• variables

• events

A code segment is a collection of program statements that is part of a ________.

• program

• variable

• loop

• function

An event is associated with an action and supplies ________ to a program.

• input data

• output data

• error messages

• system logs

The REPEAT UNTIL loop in Snap! executes the blocks inside it until a certain condition is true. Which of the following best describes what the REPEAT UNTIL loop does?

• It repeats the blocks until a specified condition is true.

• It repeats the blocks a fixed number of times.

• It repeats the blocks forever.

• It repeats the blocks only once.

To predict the number of times a piece of code will run inside nested REPEAT loops, you should:

• Multiply the number of repetitions of each REPEAT loop together.

• Add the number of repetitions of each REPEAT loop together.

• Subtract the inner loop repetitions from the outer loop repetitions.

• Divide the number of repetitions of the outer loop by the inner loop.

WHEN I AM CLICKED and WHEN (GREEN FLAG) IS CLICKED allow Snap! programmers to build event-driven code.

• True

• False

What do you divide by 360 to get your degrees for each angle?

• The number of sides the polygon has.

• The length of one side of the polygon.

• The area of the polygon.

• The sum of the interior angles.

One of the components of abstraction is ________ – tucking away the details of code to make the overall structure clearer and easier to debug.

• detail removal

• encapsulation

• inheritance

• polymorphism