End of year 8 revision quiz

What is the primary goal of a hacker as described in the document?

• To create secure computer systems

• To gain unauthorised access to data or a network

• To help users recover lost passwords

• To design new computer software

What is a Brute Force Attack?

• A method to protect data using encryption

• A software that detects viruses

• A computer program that tries different passwords until access is gained

• A type of firewall

Which of the following is a characteristic of a Denial of Service (DoS) attack?

• Encrypts data to secure it from unauthorized access

• Floods the network with useless traffic to make it unresponsive

• Scans for vulnerabilities in the network

• Provides backup services for data recovery

What does a firewall do?

• Speeds up the network traffic

• Converts data into encrypted form

• Prevents unauthorized access to or from a network

• Stores data securely on the cloud

What does HTTPS signify in terms of web data transmission?

• Data is duplicated for backup purposes

• Data is transmitted in an unencrypted form

• Data is compressed to speed up transmission

• Data being sent to and from a website is encrypted

What is the maximum number that can be represented with 8 bits in binary?

• 256

• 255

• 512

• 1024

What does an overflow error in binary addition indicate?

• The sum can be represented in less than 8 bits.

• The sum exactly fits within 8 bits.

• The sum cannot be represented in 8 bits.

• The sum requires exactly 9 bits.

Which of the following is a character set used to represent characters in binary?

• ASCII

• JPEG

• MP3

• MPEG

What does the term 'colour depth' refer to in digital graphics?

• The brightness of the image

• The number of pixels in an image

• The number of bits used to represent the color of each pixel

• The resolution of the image

What is the purpose of Adobe Photoshop in creating digital graphics?

• To add text to images

• To manipulate the size of images

• To digitally manipulate images

• To change the file format of images