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

• 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

• 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

Explanation

F5: Starts the slideshow from the beginning.

Shift+F5: Starts the slideshow from the current slide.

Alt+F5: Starts the presentation in Presenter View. 

Last updated 15-feb-2026

Explanation

An email address consists of two parts: 

1. Username or ID (the name or ID chosen by the user)
2. Domain name (the name of the organization or service provider).

Format: Username@Domainname.com

Example: john.doe@example.com

Additional information:

• Email, short for Electronic Mail, has its roots in the early 1960s.
• The first email was sent in 1971 by Ray Tomlinson.
• He also introduced the "@" symbol to separate the username from the hostname.

Last verified on 19-04-2026

Explanation

• PNG, JPEG, and GIF are image file formats used to store pictures.
• They are widely used in websites, graphics, and digital media.
• Each format has different compression and quality features.
• JPEG is best for photos.
• PNG for high-quality images.
• GIF for animations.

Last verified on 19-04-2026

Explanation

• OTP stands for One Time Password.
• It used in banking security systems.
• It is a temporary code sent to the user’s mobile/email.
• Introduced widely in digital banking for secure transactions.
• It is valid for only one login or transaction.
• Helps prevent unauthorized access and fraud.

Last verified on 19-04-2026

Explanation

To find the decimal equivalent of the binary number 1011:

(1 × 2³) + (0 × 2²) + (1 × 2¹) + (1 × 2⁰)

= (1 × 8) + (0 × 4) + (1 × 2) + (1 × 1)

= 8 + 0 + 2 + 1

= 11

Last verified on 12-04-2026

Explanation

• QR stands for Quick Response
• A QR code is a two-dimensional square barcode.
• It stores data like website links, text, or payment details

Last updated 07-09-2026 by NA