Kiến thức về Scratch và Thuật toán

What is an algorithm?

• A piece of computer source code

• A set of steps to solve a problem

• A computer software

• A hardware in a computer

In Scratch, which command helps the character move a number of steps?

• Turn left

• Turn right

• Move ... steps

• Change color

What is the angle of rotation of the character when it goes through one side of an equilateral triangle?

• 60 degrees

• 90 degrees

• 120 degrees

• 180 degrees

How many times does the character repeat when moving in an equilateral triangle?

• 2

• 3

• 4

• 5

In Scratch, which group of commands helps draw shapes when the character moves?

• Motion commands

• Pen commands

• Display commands

• Sound commands

To draw a square in Scratch, how many degrees does the character need to turn after each side?

• 45 degrees

• 90 degrees

• 120 degrees

• 180 degrees

What is a flowchart used for?

• To describe an algorithm visually

• To program in Scratch

• To store data

• To run a program

Which command in Scratch helps turn the character to the left?

• Turn left ... degrees

• Turn right ... degrees

• Move ... steps

• Hide character

If you want to draw a regular hexagon, how many degrees does the character need to turn after each side?

• 90 degrees

• 60 degrees

• 120 degrees

• 180 degrees

In Scratch, what file extension is the program file saved with?

• .exe

• .sb3

• .txt

• .jpg