Building simple robots quiz

Question 1

What is a robot, and what three basic abilities does a simple robot usually need?

Accepted Answer

Sense, think, and act

Answer

Eat, sleep, and grow

Answer

Paint, sing, and dance

Answer

Only repeat one fixed motion forever

Question 2

In the 'sense-think-act' loop, what is the job of a sensor?

Accepted Answer

To collect information from the environment as data

Answer

To supply electricity to the motors

Answer

To glue parts of the robot together

Answer

To make the robot look colorful

Question 3

Which part of a robot is the 'actuator', and what does it do?

Accepted Answer

The part that creates movement, like a motor

Answer

The part that measures temperature

Answer

The part that stores the robot's password

Answer

The part that displays text on a screen

Question 4

What is a microcontroller (like an Arduino) in a simple robot?

Accepted Answer

A small programmable computer chip that controls the robot

Answer

A type of battery used only in cars

Answer

A camera lens for taking photos

Answer

A wireless internet router

Question 5

How does an ultrasonic distance sensor help a robot avoid bumping into walls?

Accepted Answer

It measures the time for a sound echo to return and computes distance

Answer

It smells the wall using a chemical sensor

Answer

It reads a barcode printed on the wall

Answer

It uses GPS satellites to find indoor walls

Question 6

A line-following robot uses sensors that detect light and dark. Why does following a black line on a white floor work well?

Accepted Answer

Black and white reflect very different amounts of light

Answer

Black lines are magnetic and attract the robot

Answer

White floors give off heat the sensor detects

Answer

The colors smell different to the robot

Question 7

What is the difference between rule-based control and machine learning in a robot?

Accepted Answer

Rule-based uses human-written if-then rules; ML learns rules from examples

Answer

They are exactly the same thing

Answer

Rule-based needs the internet; ML never does

Answer

ML uses no data at all

Question 8

Why do robots that use machine learning need 'training data'?

Accepted Answer

So it can learn patterns from labeled examples

Answer

So it can charge its battery faster

Answer

So it can become heavier and more stable

Answer

Robots never need any data to learn

Question 9

What is a simple if-then statement, and how might it control a robot motor in Python-like code?

Accepted Answer

A rule that runs an action only when a condition is true

Answer

A way to store photos on the robot

Answer

A command that always runs no matter what

Answer

A type of motor

Question 10

What does it mean for a robot to be 'autonomous'?

Accepted Answer

It can act and decide on its own without constant human control

Answer

It must always be plugged into a wall

Answer

It can only move when a person uses a remote

Answer

It cannot use any sensors

Question 11

Why is a feedback loop important when a robot tries to drive in a straight line?

Accepted Answer

It lets the robot measure errors and correct them continuously

Answer

It makes the robot louder

Answer

It removes the need for any sensors

Answer

It permanently locks the wheels in place

Question 12

How can a camera plus machine learning let a robot recognize objects?

Accepted Answer

A trained model analyzes the image pixels to predict the object

Answer

The camera physically grabs the object

Answer

The robot guesses randomly with no model

Answer

The object sends its name by radio

Question 13

What is the role of a battery in a mobile robot, and why does its capacity matter?

Accepted Answer

It stores energy to power the robot; capacity sets how long it runs

Answer

It is only for decoration

Answer

It records the robot's photos

Answer

It replaces the microcontroller

Question 14

What is the difference between a DC motor and a servo motor in robotics?

Accepted Answer

DC motors spin continuously; servos move to a precise angle

Answer

They are identical in every way

Answer

Servos cannot move at all

Answer

DC motors only work underwater

Question 15

Why might a robot need to combine data from more than one sensor (sensor fusion)?

Accepted Answer

Combining sensors gives a more reliable view than any one alone

Answer

More sensors make the robot lighter

Answer

One sensor is always perfect, so fusion is useless

Answer

Sensor fusion means deleting all but one sensor

Question 16

What is a 'label' in a training dataset used to teach a robot's vision model?

Accepted Answer

The correct answer attached to a training example

Answer

A sticker on the robot's body

Answer

The robot's battery level

Answer

A random number with no meaning

Question 17

Why is testing a robot in many different conditions important before trusting it?

Accepted Answer

Different conditions reveal weaknesses you can fix before real use

Answer

Testing makes the robot run faster

Answer

One test is always enough for any situation

Answer

Testing is only about painting the robot

Question 18

In machine learning, what does 'overfitting' mean and why is it a problem for a robot?

Accepted Answer

The model memorizes training data and fails on new inputs

Answer

The robot becomes too heavy to move

Answer

The battery overcharges and stops working

Answer

The model works perfectly on everything forever

Question 19

What is a robotic 'arm with degrees of freedom', and what does more degrees of freedom allow?

Accepted Answer

The number of independent motions; more means more flexible reach

Answer

The number of batteries the arm needs

Answer

How many colors the arm is painted

Answer

The temperature the arm can survive

Question 20

How does a robot use a simple loop in code to keep checking its sensors?

Accepted Answer

A loop repeats sense-think-act so the robot keeps reacting

Answer

A loop runs the code only one single time

Answer

A loop powers the motors with electricity

Answer

A loop is a type of wheel

Question 21

What is the difference between 'input' and 'output' devices on a robot? Give one example of each.

Accepted Answer

Inputs gather data (sensor); outputs act on the world (motor)

Answer

Inputs and outputs are the same component

Answer

Inputs only mean the power switch

Answer

Outputs only mean the battery

Question 22

Why might a robot make a mistake even when its program has no bugs?

Accepted Answer

Noisy sensors and new situations can cause mistakes even with correct code

Answer

Perfect code guarantees zero mistakes ever

Answer

Robots never make mistakes

Answer

Only the color of the robot causes errors

Question 23

What does 'calibration' mean when setting up a robot's sensor?

Accepted Answer

Adjusting a sensor so its readings are accurate

Answer

Painting the sensor a bright color

Answer

Removing the sensor entirely

Answer

Charging the robot's battery

Question 24

How can a robot 'learn from examples' to sort objects by color without being told exact rules?

Accepted Answer

It learns color patterns from labeled examples and predicts new ones

Answer

It asks a human for every single object

Answer

It guesses colors completely at random

Answer

It cannot sort objects in any way

Question 25

What is one important safety rule when building and testing a robot with spinning motors or arms?

Accepted Answer

Keep body parts clear of moving parts and have a power off switch

Answer

Hold the spinning gears tightly with your hand

Answer

Test only at the highest possible speed first

Answer

Never use an off switch

Question 26

Why is it useful to start with a flowchart before writing a robot's program?

Accepted Answer

It plans the logic and decisions before coding, reducing mistakes

Answer

It charges the robot's battery

Answer

It replaces the need for any sensors

Answer

It is only for drawing pictures of robots

Question 27

What is the difference between 'training' a model and 'using' (inferring with) a model on a robot?

Accepted Answer

Training is learning from data; inference is making predictions later

Answer

They are the same step done twice

Answer

Inference happens before any data is collected

Answer

Training never needs any examples

Question 28

How does a wheel encoder help a robot know how far it has traveled?

Accepted Answer

It counts wheel rotations, which you convert into distance

Answer

It measures the air temperature

Answer

It takes photos of the floor

Answer

It charges the wheels with electricity

Question 29

Why should you think about privacy when a robot uses a camera or microphone?

Accepted Answer

Cameras and mics can record people, so consent and care are needed

Answer

Privacy never matters for any robot

Answer

Cameras cannot record anything personal

Answer

Only the robot's color affects privacy

Question 30

What does it mean for training data to be 'biased', and how could that affect a robot?

Accepted Answer

Unbalanced data makes the robot work poorly for under-represented cases

Answer

Bias makes the robot faster for everyone

Answer

Biased data has no effect at all

Answer

Bias only changes the robot's weight

Test yourself