Explanation

• Based on 2024–2026 data, rank as having the worst internet speeds in the world
• Yemen (approx. 1.3–5.3 Mbps) 
• Cuba (approx. 4.0 Mbps)
• Afghanistan Avg speed: ~3–6 Mbps
• Turkmenistan  Avg speed: ~3–4 Mbps
• Often featuring median download speeds under 6Mbps

Additional information 

• China is the largest internet-using country in the world,
• Exceeding 1.1 billion users as of early 2026. 

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Explanation

• 5G is the fifth generation of mobile internet technology.
• It uses high-frequency radio waves for faster speed.
• The main advanced part of 5G is millimeter wave spectrum.
• This allows very high data speed and low delay (latency).
• It supports technologies like smart cities and IoT.

Last verified on 27-04-2026

Explanation

• RAM stands for Random Access Memory
• It is a type of fast, temporary computer memory
• It is essentially short-term memory 
• It is the hardware in a computing device where the operating system (OS)

Last updated by NA on 26 April 2026

Explanation

• ALU stands for Arithmetic Logic Unit.
• It is a core part of the CPU (Central Processing Unit).
• It performs arithmetic operations like addition and subtraction.
• It also performs logical operations like AND, OR, NOT.
• It is essential for processing data in a computer system.

Last verified on 26-04-2026

Explanation

• "CD" most commonly stands for Compact Disc
• Used for storing digital audio, software programs, documents, and videos
• Origin: Co-developed by Philips and Sony, introduced in the early 1980s

Last updated by NA on 26 April 2026

Explanation

• Ctrl + H is used for Find and Replace function.
• It allows users to search text and replace it quickly.

Additional information:

• Ctrl + F → Find text
• Ctrl + C → Copy
• Ctrl + V → Paste
• Ctrl + X → Cut
• Ctrl + Z → Undo

Last verified on 19-04-2026

Explanation

• LAN is ideal for connecting computers in closely located buildings, such as within a campus or office block.
• LAN stands for Local Area Network.
• It offers high speed and cost-effective connectivity over short distances.

Last verified on 19-04-2026

Explanation

• AI stands for Artificial Intelligence.
• It refers to machines that can think, learn, and make decisions like humans.
• AI is widely used in computers, mobile apps, and robotics.
• It helps in tasks like voice recognition, image detection, and automation.
• This is used in 5th generation computers.

Last verified on 19-04-2026

Explanation

• Ctrl + N is to open a new document in MS Word.
• Ctrl + M -- Indent the paragraph.
• Ctrl + B -- Bold highlighted selection.
• Ctrl + D -- Font options.
• Alt + F -- File menu options in the current program.
• Alt + E -- Edits options in the current program.

Last verified on 19-04-2026

Explanation

• In Microsoft Excel, the SUM function is used for addition.
• It adds numbers in a selected range of cells.
• Example: =SUM(A1:A5) adds values from A1 to A5.

Additional information:

• AVERAGE → calculates mean
• COUNT → counts numbers
• MAX → finds highest value
• MIN → finds lowest value
• PRODUCT → multiplies values

Last verified on 19-04-2026