VEX VR S2 Exam

How can the following example be simplified by using a [Repeat] block?

• By placing the [Drive for] and [Turn for] blocks in a [Repeat] block that repeats four times.

• By placing the [Drive for] block in a [Repeat] block that repeats four times.

• By placing the [Turn for] block in a [Repeat] block that repeats four times.

• By changing all of the parameters of the [Drive for] blocks to 400 millimeters (mm) instead of 200 millimeters (mm).

When will the VR Robot move the VR Pen up?

• Before the [Repeat] block has repeated all of the blocks inside of it twice.

• Before the VR Pen is set to the color red.

• After the [Repeat] block has repeated all of the blocks inside of it six times.

• After the [Repeat] block has repeated all of the blocks inside of it twice.

In this sample project the VR Robot should get to the number "2" in the Wall Maze, but it does not. Which of the following describes the error in this project?

• A drive_for command is missing.

• A less than (<) operator was used instead of a greater than (>) operator.

• A turn_for command was used instead of turn command.

• A turn_to_rotation command is missing.

Which of the following describes how the VR Robot will move in this project?

• The VR Robot will drive forward while the Distance Sensor reports a distance less than 150 millimeters away from an object, then stop.

• The VR Robot will drive forward while the Distance Sensor reports a distance greater than 150 millimeters away from an object, then stop.

• The VR Robot will drive exactly 150 millimeters then stop.

• The VR Robot will drive forward, stop, drive forward again for 150 millimeters then stop.

Which of the following describes why the VR Robot will not move in this example project?

• The distance between the Distance Sensor and the object is less than 150 millimeters (mm) away.

• The Left Bumper is not being pressed.

• The distance between the Distance Sensor and the object is greater than 150 millimeters (mm) away.

• The VR Robot will immediately crash into a wall if it moves.

This project is intended to drive to number '61' on the Number Grid Map Playground but does not work. Number '61' has the coordinates X: -900 and Y: 300. What is the error?

• The <Less than> block should be set to -300.

• This project should use a <Greater than> block instead of a <Less than> block and be set to -900.

• This project should use a <Greater than> block instead of a <Less than> block and keep the same

  parameters.

• d. The <Less than> block should be set to -900 instead of 300.

This project is intended to drive to number "91" on the Number Grid Map Playground but the project is incomplete. What block from the Sensing category should be placed in the first [Wait until] block?

• (Position of Robot) block

• (Distance from) block

• (Timer value) block

• block

Why is the [If then] block nested inside the [Forever] block for this project?

• Conditions of the [If then] block will be checked continually if nested in a [Forever] block. the VR Robot will use the Down Eye Sensor to continually check for an object.

• The [Forever] block is not needed.

• If the [Forever] block was not used, the [If then] block would only be executed and checked four times.

• To turn right for 90 degrees when an object is detected.

Describe why a [Forever] block is used in this project.

• To continuously check if the VR Robot Pen is up or down.

• To continuously check if the VR Robot is near an object with detectable colors.

• To draw the color blue with the VR Robot Pen.

• To report if the Bumper Sensors are being pressed.

Refer to the code blocks shown. In this project, what will happen if the Down Eye Sensor does NOT detect an object?

• The VR Robot will check the condition of the again.

• The VR Robot will drive forward.

• The VR Robot will stop driving.

• The VR Robot will stop driving, then set the Electromagnet to 'boost'.