XRP Unit 2: Lesson 2 Quiz - Ultrasonic Sensor, Python Variables & While Loop

Question 1

A global variable is _________.

Accepted Answer

A variable that is created outside of a function

Question 2

Which type case is the following variable written in? x = i_love_robots

Accepted Answer

Snake case

Question 3

A _____ in Python is a control structure that repeats a block of code as long as a certain condition is true.

Accepted Answer

While loop

Question 4

What is the main use case of the ultrasonic sensor in robotics?

Accepted Answer

Detecting & avoiding obstacles

Question 5

Which of these statements is not a rule for making variables in Python?

Accepted Answer

Variable names must always start with a capital letter.

Question 6

Select all that apply: Why are while loops useful when programming an ultrasonic sensor to detect obstacles?

Accepted Answer

Robot can react in real time based on changing sensor readings, Allows the robot to keep checking the distance to an obstacle continuously

Question 7

One transducer in an ultrasonic sensor acts as a microphone and the other acts as a __________.

Accepted Answer

Speaker

Question 8

The correct syntax to print a string variable (x) and an integer variable (y) together is: print(x+y)

Accepted Answer

False

Question 9

An int variable in Python is _____.

Accepted Answer

Whole number, positive or negative, without decimals, of unlimited length

Question 10

String variables can be declared either by using single or double quotes.

Accepted Answer

True

Question 11

What is a float variable in Python?

Accepted Answer

A number, positive or negative, containing one or more decimals

Question 12

The continue statement will stop the current iteration of the while loop and move on to the next one.

Accepted Answer

True

Question 13

What is the definition of a variable in Python?

Accepted Answer

Variables are containers for storing data values.

Question 14

Select all answers that apply. Global variables are useful because:

Accepted Answer

Can set values once and don't need to pass values into a function to use it, They can be accessed and used by any function in a program., Makes it easier to share key values across different parts of the code

Question 15

You can assign multiple variables to the same value in a single line in Python.

Accepted Answer

True

Question 16

What does the sleep value represent when programming an ultrasonic sensor?

Accepted Answer

How often in seconds the sensor checks how far away it is from the obstacle

Question 17

Which of these variables is written in Pascale case?

Accepted Answer

x = GirlsWhoCode

Question 18

Variable names are not case sensitive.

Accepted Answer

False

Question 19

The else statement will run a different block of code once the while condition is no longer true.

Accepted Answer

True

Question 20

What does the break statement do to a while loop?

Accepted Answer

Stops a while loop even if the while condition is still true.

Question 21

What is a transducer?

Accepted Answer

A device that converts an electrical signal into a physical quantity.

XRP Unit 2: Lesson 2 Quiz - Ultrasonic Sensor, Python Variables & While Loop

Questions 21

XRP Unit 2: Lesson 2 Quiz - Ultrasonic Sensor, Python Variables & While Loop

Questions 21