MSWLogo Summative Exam

Which window displays the turtle’s graphics in MSWLogo?

• Commander Window

• Graphics Window

• Editor Window

• Output Window

Answer explanation

The Graphics Window in MSWLogo is specifically designed to display the turtle's graphics, allowing users to see the drawings and movements made by the turtle. Other windows serve different purposes.

In the Commander Window, where do you type your commands?

• Input Box

• Recall Box

• History Box

• Command Box

Answer explanation

In the Commander Window, commands are typed in the Input Box. This is where users enter their commands for execution, making it the correct choice compared to the other options.

What is the primary purpose of the Recall Box in the Commander Window?

• To show error messages

• To display previously entered commands

• To show the turtle’s current position

• To display system messages

Answer explanation

The Recall Box in the Commander Window is primarily used to display previously entered commands, allowing users to easily access and reuse them without retyping.

Which command moves the turtle forward 100 steps?

• FD 100

• FORWARD100

• F 100

• FOR 100

Answer explanation

The command 'FD 100' is the correct syntax in turtle graphics to move the turtle forward by 100 steps. Other options either lack proper formatting or do not represent valid commands.

The command RT 90 will:

• Move the turtle right 90 steps

• Turn the turtle 90 degrees clockwise

• Move the turtle to position 90

• Turn the turtle 90 degrees counterclockwise

Answer explanation

The command RT 90 instructs the turtle to turn 90 degrees clockwise, not to move or change position. This is a standard command in turtle graphics for rotation.

What is the correct syntax to move the turtle backward 50 steps?

• BACK 50

• BK 50

• BACKWARD50

Answer explanation

The correct syntax to move the turtle backward is either 'BACK 50' or 'BK 50'. 'BACKWARD50' is incorrect as it lacks a space. Both 'BACK 50' and 'BK 50' effectively instruct the turtle to move backward 50 steps.

Which command returns the turtle to its starting position and orientation?

• START

• RESET

• HOME

• ORIGIN

Answer explanation

The command 'HOME' returns the turtle to its starting position at the center of the screen with its original orientation. Other options like 'START', 'RESET', and 'ORIGIN' do not specifically serve this function.

What does SETH 90 do?

• Sets the turtle’s heading to face east

• Sets the turtle’s heading to face north

• Sets the turtle’s heading to face west

• Sets the turtle’s heading to face south

Answer explanation

SETH 90 sets the turtle's heading to 90 degrees, which corresponds to facing north. This is a standard command in turtle graphics to orient the turtle in a specific direction.

The command to clear both the graphics screen and command history is:

• CS

• CT

• CLEAR

Answer explanation

The commands 'CS' and 'CT' are used to clear both the graphics screen and command history. 'CLEAR' does not perform this function, making 'CS' and 'CT' the correct choices.

How do you make the turtle invisible?

• HT

• HIDETURTLE

• INVISIBLE

Answer explanation

To make the turtle invisible, you can use either 'HT' or 'HIDETURTLE'. Both commands serve the same purpose, making the turtle not visible on the screen.