ICT General Knowledge 4 — Questions and Answers
Question 1: Which data structure operates on a 'Last In, First Out' (LIFO) principle?
- Queue
- Stack (Correct answer)
- Linked List
- Array
Correct answer: Stack
A stack follows the LIFO principle, where the last element added is the first one to be removed.
Question 2: What is two-factor authentication (2FA)?
- Using two different passwords for one account
- A security process requiring two distinct forms of identification to access an account (Correct answer)
- Encrypting data twice for extra security
- Sharing login credentials between two users
Correct answer: A security process requiring two distinct forms of identification to access an account
2FA adds a second layer of security by requiring a second verification step (like a code sent to your phone) beyond just a password.
Question 3: Which HTML tag is used to create a hyperlink?
- <link>
- <href>
- <a> (Correct answer)
- <url>
Correct answer: <a>
The <a> (anchor) tag is used in HTML to create hyperlinks, using the href attribute to specify the destination URL.
Question 4: What does the term 'open source' mean in software development?
- Software that is always free of charge
- Software whose source code is publicly available for anyone to view, modify, and distribute (Correct answer)
- Software developed only by government agencies
- Software without any licensing restrictions
Correct answer: Software whose source code is publicly available for anyone to view, modify, and distribute
Open source software makes its source code publicly available, allowing anyone to inspect, modify, and enhance it.
Question 5: In a relational database, what is a 'primary key'?
- The first column in any table
- The administrator's login credential
- A unique identifier for each record in a table (Correct answer)
- The most frequently accessed field in a table
Correct answer: A unique identifier for each record in a table
A primary key is a column (or set of columns) that uniquely identifies each row in a database table.
Question 6: Which of the following is NOT a characteristic of 5G wireless technology compared to 4G?
- Higher data speeds
- Lower latency
- Fewer connected devices per area (Correct answer)
- Greater network capacity
Correct answer: Fewer connected devices per area
5G supports significantly more connected devices per unit area than 4G — it does not support fewer devices.
Question 7: What is the function of an operating system's kernel?
- Render graphics on screen
- Manage the web browser
- Serve as the core that manages hardware resources and system processes (Correct answer)
- Handle user account passwords
Correct answer: Serve as the core that manages hardware resources and system processes
The kernel is the core component of an OS that manages CPU, memory, and I/O devices, bridging hardware and software.
ICT General Knowledge 4
Which data structure operates on a 'Last In, First Out' (LIFO) principle?