Pearson GCSE Computer Science Paper 1 Quiz

What is the binary representation of the decimal number 25?

• 10011

• 10101

• 11001

• 11100

Explain the difference between ASCII and Unicode.

• ASCII and Unicode are both 8-bit character sets with the same number of characters.

• ASCII is a 7-bit character set containing 128 characters, while Unicode is a 16-bit character set containing over 65,000 characters.

• ASCII and Unicode are the same thing and can be used interchangeably.

• ASCII is a 16-bit character set containing over 65,000 characters, while Unicode is a 7-bit character set containing 128 characters.

What is the purpose of a variable in programming?

• To slow down the program

• To confuse other programmers

• To make the code more colorful

• To store and manipulate data

What is the output of the following Python code: print(5 + 3 * 2)?

• 11

• 10

• 7

• 15

Explain the function of the CPU in a computer system.

• Responsible for storing data

• Responsible for printing documents

• Responsible for executing instructions and performing calculations.

• Responsible for playing audio files

What is the role of a router in a computer network?

• Forwards data packets between computer networks

• Sends emails between computer networks

• Manages the computer network security

• Stores data on the computer network

What is a firewall and how does it protect a network?

• A firewall protects a network by only monitoring incoming network traffic and ignoring outgoing traffic.

• A firewall protects a network by slowing down the network speed and causing delays in data transmission.

• A firewall protects a network by allowing all incoming and outgoing network traffic without any restrictions.

• A firewall protects a network by monitoring and controlling incoming and outgoing network traffic based on predetermined security rules.

Explain the concept of encryption and its importance in cybersecurity.

• Encryption is only used for non-sensitive information and has no impact on cybersecurity.

• Encryption is the process of converting data into a code to prevent unauthorized access. It is important in cybersecurity to protect sensitive information from being accessed by hackers or unauthorized users.

• Encryption is the process of converting data into a physical form for storage.

• Encryption is not important in cybersecurity as it slows down data transfer.