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

• 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

Explanation

• A Modem (Modulator-Demodulator) converts digital signals into analog signals and vice versa.
• It is used to connect computers to the internet via telephone lines or other networks.

Additional information:

• Switch – connects multiple devices in a network
• Hub – basic network connector
• Repeater – boosts signal strength
• Router – directs internet traffic

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