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WorksheetsiGCSE-Recap_Quiz (unit 1-5)
Total questions: 30
Worksheet time: 15mins
Name
Class
Date
1.
Which number system do computers use to represent data?
a)
Decimal
b)
Binary
c)
Hexadecimal
d)
Octal
2.
What is the purpose of ASCII and Unicode?
a)
To store images in a compressed format
b)
To represent text characters as binary codes
c)
To transmit data over a network
d)
To encrypt data for security
3.
Which factors affect the quality and file size of a digital sound recording?
a)
Sample rate and sample resolution
b)
Image resolution and color depth
c)
File compression method
d)
Network bandwidth
4.
What is a pixel?
a)
A type of file compression
b)
A unit of data storage
c)
A point of light that makes up a digital image
d)
A network protocol
5.
What is the difference between lossless and lossy data compression?
a)
Lossless compression is faster than lossy compression
b)
Lossless compression preserves all original data, while lossy compression removes some data
c)
Lossless compression is used for images, while lossy compression is used for audio
d)
Lossless compression results in smaller file sizes than lossy compression
6.
What is a data packet?
a)
A unit of data storage
b)
A type of error detection method
c)
A segment of data transmitted over a network
d)
A type of encryption algorithm
7.
What is packet switching?
a)
A method for storing data in a database
b)
A technique for transmitting data packets independently across a network
c)
A type of error correction code
d)
A way to encrypt data for secure transmission
8.
Which data transmission method sends data one bit at a time?
a)
Parallel
b)
Serial
c)
Simplex
d)
Half-duplex
9.
What is the advantage of parallel data transmission over serial transmission?
a)
Greater reliability over long distances
b)
Higher speed
c)
Lower cost
d)
Better security
10.
What is full-duplex data transmission?
a)
One-way transmission
b)
Two-way transmission, but not simultaneous
c)
Simultaneous two-way transmission
d)
Transmission with built-in error correction
11.
What is the purpose of a parity check?
a)
To compress data for efficient storage
b)
To detect errors in data transmission
c)
To encrypt data for security
d)
To route data packets across a network
12.
Which error detection method involves calculating a value based on the data and sending it along with the data?
a)
Parity check
b)
Checksum
c)
Echo check
d)
Cyclic redundancy check
13.
What is the key difference between symmetric and asymmetric encryption?
a)
Symmetric encryption is faster than asymmetric encryption
b)
Symmetric encryption uses the same key for encryption and decryption, while asymmetric encryption uses separate keys
c)
Symmetric encryption is more secure than asymmetric encryption
d)
Symmetric encryption is used for data storage, while asymmetric encryption is used for data transmission
14.
What is the CPU's primary function?
a)
To store data permanently
b)
To display output to the user
c)
To connect to the internet
d)
To execute instructions
15.
What is the von Neumann architecture?
a)
A type of network topology
b)
A method for compressing data
c)
A computer architecture where data and instructions are stored in the same memory
d)
A type of operating system
16.
What is the role of the ALU (Arithmetic Logic Unit)?
a)
To manage the computer's memory
b)
To handle input and output operations
c)
To perform arithmetic and logical calculations
d)
To control the fetch-decode-execute cycle
17.
Which of these is an output device?
a)
Keyboard
b)
Mouse
c)
Scanner
d)
Printer
18.
What is a sensor?
a)
A type of output device
b)
A program that detects malware
c)
A device that converts physical phenomena into digital signals
d)
A network protocol
19.
What is the main difference between RAM and ROM?
a)
RAM is faster than ROM
b)
RAM is used for storage, while ROM is used for processing
c)
RAM is volatile, while ROM is non-volatile
d)
RAM stores programs, while ROM stores data
20.
Which storage technology is known for its high speed and durability?
a)
Hard disk drive (HDD)
b)
Optical disk (CD/DVD)
c)
Solid-state drive (SSD)
d)
Magnetic tape
21.
What is the purpose of a Network Interface Card (NIC)?
a)
To store data files
b)
To connect a computer to a network
c)
To process instructions
d)
To display output to the user
22.
What is a MAC address?
a)
A unique identifier assigned to each network interface card
b)
A temporary IP address assigned to a device
c)
A protocol for transferring data over the internet
d)
A type of encryption algorithm
23.
What is the difference between system software and application software?
a)
System software is written in a high-level language, while application software is written in a low-level language
b)
System software manages hardware resources, while application software performs specific tasks for users
c)
System software is stored on secondary storage, while application software is stored in RAM
d)
System software is developed by hardware manufacturers, while application software is developed by independent developers
24.
What is the main function of an operating system?
a)
To create spreadsheets and documents
b)
To browse the internet
c)
To manage hardware and software resources and provide a user interface
d)
To write computer programs
25.
What is a high-level programming language?
a)
A language that is difficult for humans to understand but is directly executable by the CPU
b)
A language that is easy for humans to understand but needs to be translated into machine code
c)
A language specifically designed for developing operating systems
d)
A language used to communicate with hardware devices
26.
What is the role of a compiler?
a)
To execute high-level programming code directly
b)
To convert high-level programming code into machine code
c)
To manage computer memory
d)
To create network connections
27.
What is the internet?
a)
A software application for browsing websites
b)
A type of programming language
c)
A global network of interconnected networks
d)
A file storage system
28.
What is the purpose of a URL (Uniform Resource Locator)?
a)
To encrypt data for secure transmission
b)
To identify and locate web resources
c)
To define the structure and content of a web page
d)
To manage network traffic
29.
What is the difference between HTTP and HTTPS?
a)
HTTP is used for downloading files, while HTTPS is used for uploading files
b)
HTTP is faster than HTTPS
c)
HTTP is used for secure communication, while HTTPS is used for non-secure communication
d)
HTTPS uses encryption to secure data transmission, while HTTP does not
30.
What are cookies?
a)
Small text files stored on a user's computer by websites
b)
A type of malware
c)
A protocol for sending email
d)
A method for compressing data
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