Computer Science MCQS

Avira, Kaspersky, and McAfee are antivirus software, but Oracle is a company known for database software and enterprise applications, not antivirus.

A Trojan horse is malicious software disguised as legitimate or useful software, but it secretly carries out harmful actions.

Encryption is the process of encoding information to prevent unauthorized access, making it unreadable without the correct decryption key.

Notebooks, laptops, palms, and hand-held computers are all designed for mobility and ease of transport, thus categorizing them as portable computers.

Disk Defragmenter is a Windows utility that consolidates fragmented files and free space on a hard drive, optimizing disk access and system performance.

Documentation encompasses the detailed written descriptions of a program's cycle, design, test results, and code, providing a complete understanding of the software.

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

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

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

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

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

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

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

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

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

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

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

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

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.

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

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

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

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.