Understanding Iteration Quiz

What is iteration?

• A sequence of instructions that is continually repeated.

• A single instruction that is executed once.

• A method to debug code.

• A way to store data.

Why is iteration sometimes called repetition?

• Because it involves repeating a sequence of instructions.

• Because it is used to store data.

• Because it is a method to debug code.

• Because it is a way to write comments in code.

Why is it useful to use a repeat structure in an algorithm?

• It can make the program much shorter.

• It can make the program run slower.

• It can make the program more complex.

• It can make the program harder to understand.

What are programmers always looking for when using iteration?

• Ways to make their programs shorter.

• Ways to make their programs longer.

• Ways to make their programs more complex.

• Ways to make their programs harder to understand.

What is the first step to make Scratch the Cat draw a square without using iteration?

• Add the green flag block to the coding window.

• Click on add extension.

• Choose the extension Pen.

• Grab a Motion block and change it to 100.

Which extension should be chosen to draw with sprites in Scratch?

• Motion

• Looks

• Pen

• Sound

What block should be added from the Pen blocks to start drawing?

• Pen up

• Pen down

• Erase all

• Stamp

What value should the Motion block be changed to for the length of a side of the square?

• 50

• 75

• 100

• 150

What angle should the turn block be set to in order to make the cat turn 90 degrees?

• 45

• 60

• 90

• 120

What block should be added first to the coding window to start drawing a square in Scratch?

• Pen down

• Repeat

• Green flag

• Motion