Explanation

The CPU (Central Processing Unit) is a hardware component of the computer.

It performs all processing and calculations, acting as the computer’s brain.

The CPU performs basic arithmetic, logic, controlling, and input/output (I/O) operations specified by the instructions in the program.

Explanation

In MS Office, the valid line spacing are:

• Single (1.0)
• Double (2.0)
• Multiple (1.5, 2.5, etc.)

Triple is not a standard line spacing in MS Office.

Apply single spacing to the paragraph. Ctrl+1

Apply double spacing to the paragraph. Ctrl+2

Apply 1.5-line spacing to the paragraph. Ctrl+5

Explanation

In an Excel worksheet, the first cell is labeled as A1 due to the following reasons:

1. Grid System: Excel uses a grid to organize cells, with rows and columns.
2. Rows Labeled by Numbers: Rows are labeled using numbers (1, 2, 3, etc.).
3. Columns Labeled by Letters: Columns are labeled using letters (A, B, C, etc.).
4. First Cell Location: The first cell is located at the intersection of row 1 and column A, hence labeled A1.

Explanation

 Word Art is the Text Styling feature in Microsoft Word. 

Explanation

E-Commerce refers to the buying and selling of goods and services over the internet.

It allowing businesses and consumers to conduct trade online.

Explanation

• In MS Word, With the help of Print Layout view can you see how text and graphics will appear on the printed page.
• Your document opens showing the entire page, just the way it will appear when it is printed on a sheet of paper.
• You can make changes while text formatting, images, and page layout are visible.

Explanation

• Computer Virus: A malicious program deliberately created to infect computers.
• A virus can remain inactive without showing symptoms.
• How It Operates: Dormancy and replication
• Sources of Infection: Email attachments, internet downloads, and infected files.
• First Computer Virus: Creeper (1971).
• First PC Virus: Brain (1986), created in Pakistan by Basit and Amjad Farooq Alvi.

Last updated by NA on 05-11-2026

Explanation

Yahoo started as a search engine and directory of web pages in 1994.

Over time, Yahoo expanded to include news, finance, and other content, becoming a popular news website.

Explanation

Keyboard is an input device.

Keyboard is similar to electric typewriter.

Keyboard uses serial port to connect with computer.

Keys on keyboard are of mainly three types:

Alphanumeric keys: letters and numbers 

Punctuation keys: comma, period, semicolon, etc.

Special keys: function keys, arrow keys, caps lock key, etc. 
Keyboard inventor: Christopher Latham 

Smallest key on keyboard: Space key

Explanation

TEXT data type contains all types of text data type.

It comprises more than single-byte character that is supported by the system.