Data and Data Representation Quizzes for Year 3 Computing

Question 1

What do we use to organize data in a computer?

Accepted Answer

Data structures

Answer

Shapes

Answer

Printers

Answer

Keyboards

Question 2

How do computers store pictures?

Accepted Answer

Using numbers in two groups: 0s and 1s

Answer

As lines and circles

Answer

As words and numbers

Answer

Using a secret code

Question 3

What do we use to keep lots of data together in one place?

Accepted Answer

Databases

Answer

Folders

Answer

Notebooks

Answer

Drawings

Question 4

What do we use when we need to find something in a large dataset?

Accepted Answer

Search algorithms

Answer

Magnets

Answer

Guessing games

Answer

X-ray machines

Question 5

Which type of search algorithm checks each item one by one?

Accepted Answer

Linear search

Answer

Treasure hunt

Answer

Sorting

Answer

Guessing

Question 6

What do we use to make data easier to understand?

Accepted Answer

Data visualizations

Answer

Magic tricks

Answer

Mind reading

Answer

Secret codes

Question 7

Which data type is used to store numbers?

Accepted Answer

Integer

Answer

String

Answer

Boolean

Answer

List

Question 8

Which of these is **not** a type of data that computers can store?

Accepted Answer

Smells

Answer

Words

Answer

Numbers

Answer

Sounds

Question 9

How many small pieces called 'bits' make up one byte?

Accepted Answer

8

Answer

2

Answer

4

Answer

16

Question 10

What is the difference between ASCII and Unicode?

Accepted Answer

Unicode can store special characters that ASCII cannot.

Answer

ASCII can store more characters than Unicode.

Answer

ASCII is used for numbers, while Unicode is used for text.

Answer

There is no difference between ASCII and Unicode.

Question 11

How do computers store pictures?

Accepted Answer

As a list of colours for each tiny square in the picture

Answer

As a description of what the picture looks like

Answer

As a real-life copy of the picture

Answer

As a sound file

Question 12

What is the purpose of using something called 'compression' on a file?

Accepted Answer

To make the file smaller

Answer

To make the file open faster

Answer

To make the file more secure

Answer

To make the file look nicer

Question 13

Which type of network is used to connect devices in your home?

Accepted Answer

LAN

Answer

WAN

Answer

MAN

Answer

PAN

Question 14

What is the main purpose of the internet?

Accepted Answer

To connect computers and devices all over the world

Answer

To store data safely

Answer

To make calculations quickly

Answer

To display information on screens

Question 15

What is the difference between data and information?

Accepted Answer

Data is raw facts. Information is processed data.

Answer

Information is raw facts. Data is processed data.

Answer

Data and information are the same thing.

Answer

There is no difference between data and information.

Question 16

What is the purpose of data encryption?

Accepted Answer

To protect data from unauthorized access

Answer

To speed up data processing

Answer

To improve data accuracy

Answer

None of these

Question 17

Why is data integrity important?

Accepted Answer

Ensures that data is accurate and reliable.

Answer

Improves data processing efficiency

Answer

Protects data from unauthorized access

Answer

None of these

Question 18

What kind of data can store numbers?

Accepted Answer

Numbers

Answer

Text

Answer

Yes/No

Answer

Pictures

Question 19

What's the main thing a data structure does?

Accepted Answer

Keeps information sorted and easy to find

Answer

Keeps information safe from anyone else

Answer

Makes information faster to work with

Answer

Sends information between computers

Question 20

What does this show in binary: 0000101?

Accepted Answer

5

Answer

9

Answer

15

Answer

25

Question 21

Which of these makes files smaller without losing any information?

Accepted Answer

ZIP

Answer

JPEG

Answer

MP3

Answer

GIF

Question 22

What do we call a collection of data that can be sorted and searched?

Accepted Answer

Database

Answer

Spreadsheet

Answer

Library

Answer

Warehouse

Question 23

Which of these helps store and manage a database?

Accepted Answer

DBMS

Answer

Table

Answer

Box

Answer

Folder

Question 24

What's the name for a set of instructions that tell a computer what to do?

Accepted Answer

Algorithm

Answer

List

Answer

Plan

Answer

Design

Question 25

What does a compiler do?

Accepted Answer

Turns computer language into a form the computer understands

Answer

Runs a program

Answer

Finds and fixes errors in a program

Answer

Saves information

Question 26

How can we store the name 'London' in a computer system?

Accepted Answer

As a string (letters)

Answer

As a number

Answer

As an image

Answer

As a sound

Question 27

What is a list?

Accepted Answer

A type of data structure

Answer

A table to show data

Answer

A picture

Answer

A graph

Question 28

Why do we use data structures?

Accepted Answer

To keep data organized

Answer

To make calculations

Answer

To show data

Answer

To input data

Question 29

What makes a linked list different?

Accepted Answer

Each item points to the next one

Answer

All items are stored together

Answer

We can get to each item by its number

Answer

The list can only hold a certain number of items

Question 30

How are a stack and a queue different?

Accepted Answer

A stack is like a pile of plates, while a queue is like a line of people

Answer

A stack is for temporary storage, while a queue is for permanent storage

Answer

A stack uses an array, while a queue uses a linked list

Answer

There is no difference between a stack and a queue

Question 31

Which of the following is NOT a data structure?

Accepted Answer

Function

Answer

Array

Answer

Graph

Answer

Tree

Question 32

What is the main purpose of encryption?

Accepted Answer

To keep data secret from unauthorized people

Answer

To make data smaller so it takes up less space

Answer

To make data easier to read and understand

Answer

To allow multiple people to access data at the same time

Question 33

Which of the following is NOT a cyber security threat?

Accepted Answer

Anti-virus software

Answer

Malware

Answer

Phishing

Answer

Hacking

Question 34

Which tool can you use to see the code of a website?

Accepted Answer

Web browser

Answer

Paint

Answer

Microsoft Word

Answer

Calculator

Question 35

Which of the following is **not** a basic data type?

Accepted Answer

Table

Answer

Number

Answer

String

Answer

Boolean

Question 36

Which data structure is best for storing a list of students in a class?

Accepted Answer

Array

Answer

Queue

Answer

Stack

Answer

Linked List

Question 37

Which of the following is a **lossless** data compression technique?

Accepted Answer

Huffman Coding

Answer

JPEG

Answer

GIF

Answer

MP3

Question 38

What is the purpose of a checksum?

Accepted Answer

To detect errors in data transmission

Answer

To compress data

Answer

To encrypt data

Answer

To store data

Question 39

Which of the following is an example of **structured** data?

Accepted Answer

XML

Answer

Audio file

Answer

Text file

Answer

Image file

Question 40

What is the main role of a database management system (DBMS)?

Accepted Answer

To manage and organize data in a database

Answer

To display data on a screen

Answer

To create computer programs

Question 41

Which of the following is a type of cloud computing service?

Accepted Answer

Software as a Service (SaaS)

Answer

Web hosting

Answer

File sharing

Question 42

What is an advantage of using a graphical user interface (GUI)?

Accepted Answer

Makes it easier for users to interact with the computer

Answer

Saves memory

Answer

Increases the processing speed

Question 43

Which of the following is a security risk associated with using the internet?

Accepted Answer

Malware

Answer

Traffic jams

Answer

Bad weather

Answer

Power outages