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WorksheetsYear 9 revision
Total questions: 20
Worksheet time: 12mins
Which of the following best describes "netiquette"?
The study of computer hardware
The correct or acceptable way of communicating on the internet
The process of analyzing data in Excel
The method of converting binary to hexadecimal
What is the main focus of cyber security?
Creating computer games
Protecting computer systems and networks from digital attacks
Designing websites
Learning new programming languages
Which of the following is NOT a number system mentioned in the content?
Binary
Denary
Octal
Hexadecimal
Why is computational thinking important in computer science?
It helps you memorize computer parts
It allows you to solve problems by breaking them down into smaller, manageable steps
It is used to design computer hardware
It is only useful for coding in binary
What is a single digit in binary called?
Bit
Byte
Nibble
Digit
In binary, what does the digit 1 represent?
No value
Off
On
Error
When adding two binary strings, what must you do if the sum in a column is 2?
Write 2 in the column
Ignore the extra 1
Carry the 1 to the column to the left
Start over
Why do the placeholders in binary double each time, starting at a value of 1?
Because binary uses only 0 and 1
To match decimal system
To represent increasing powers of 2
To make calculations easier
Which of the following best describes how normal numbers can be represented in binary?
Using only odd numbers
Using only even numbers
Using just 0 and 1 as placeholders
Using letters and numbers
Which numbering system is used in computing to make long binary strings simpler for humans to remember?
Decimal
Octal
Hexadecimal
Roman Numerals
In programming, where are values stored?
In 'boxes' called variables
In folders
In drawers
In files only
How does Python execute instructions in a program?
One after the other
All at once
In reverse order
Only the first instruction
Why is it important to be careful with spelling and names in Python?
Python is fussy about spelling and names
Python ignores spelling mistakes
Python automatically corrects names
Python does not use names
Which data type is used for a number with a decimal?
Integer
Float
String
Boolean
A collection of characters is known as what data type?
Integer
Float
String
Boolean
Why is it important to understand the components within a computer?
To know how they work together
To play more video games
To write better stories
To improve handwriting
What is the value of the binary number 101 in decimal?
10
3
5
7
What does the term 'Boolean' refer to in programming?
A data type with only two possible values: True or False
A type of loop
A type of error
A way to store text
A type of malware that encrypts (locks) your data, and demands payment to decrypt (unlock) it
(a)
Match the following
Software that causes unwanted adverts to appear
Adware
Any type pf software created to cause harm to computers, software or files
Malware
A program with hidden malware inside
Trojan
A type of malware that damages files and software
Virus
Someone who illegally accesses computers, networks or data
Hacker
