A computer requires an operating system to boot up and manage its hardware and software resources effectively.

A light pen is an optical input device used to select or modify data on a computer screen by detecting light.

Alan Turing is considered the "Father of Computer Science" and artificial intelligence for his foundational work on computability and algorithms.

Analog computers operate by processing continuously varying physical quantities, such as voltage or current, which are represented by continuous electrical pulses.

Vinton Cerf is widely acknowledged as one of the "Fathers of the Internet" for his pivotal role in developing the TCP/IP protocols.

When a picture is resized proportionally by a certain percentage, maintaining its aspect ratio, the process is accurately described as scaling.

Charles Babbage is widely regarded as the "Father of the Computer" for his conceptual design of the Analytical Engine, foundational to modern computing.

In Microsoft Excel, a comment added to a cell that appears when the mouse pointer hovers over it is specifically called a Cell Tip.

CDMA stands for Code Division Multiple Access. It is a digital cellular communication technology that allows multiple users to share the same frequency band by assigning each user a unique code. CDMA was widely used in 2G and 3G mobile networks.

Why the other options are incorrect:

• Code Data Mobile Access: This is not the correct expansion of the acronym CDMA.
• Communication Division Multiple Access: This is an incorrect expansion and is not recognized in telecommunications.
• Central Digital Mobile Access: This is not a valid expansion of CDMA.

The top row of a standard keyboard features function keys (F1-F12), and the space bar is universally recognized as the longest key.

Ctrl, Shift, and Alt are called modifier keys because they change the normal action of another key when pressed simultaneously, enabling new commands.

HTML (HyperText Markup Language) is the fundamental language specifically designed and used for creating and structuring content for webpages on the internet.

The AutoFormat dialog box allows users to selectively apply or exclude various formatting options, including number, border, and font formats, hence "All of above" is correct.

A spreadsheet cell can contain a label, a value, or a formula, making "All of these" the correct comprehensive answer for its content.

Execution time refers to the duration a computer spends actively processing a specific job or set of instructions.

In video editing, rendering is the final processing step where all edits, effects, and transitions are combined to create the final video file.

HTML (HyperText Markup Language) is the standard markup language used for creating and structuring content on web pages.

Radio exemplifies analog-to-analog conversion, transforming sound waves into analog electrical signals for transmission and then back to audible sound.

Phishing scams involve fraudulent attempts by individuals to trick you into revealing confidential information by impersonating trustworthy entities.

In Microsoft Excel, columns are typically labelled alphabetically starting with A, B, C, and continuing sequentially.