In Microsoft Excel, pressing F2 allows you to edit the selected cell or an existing chart. When editing a chart, you can modify its data or design.

F1 is used to open help.

F3 is used to paste a defined name.

F4 repeats the last action, but it is not used for editing charts directly.

The term VIRUS is often believed to stand for Vital Information Resource under Seize. However, this is a backronym, meaning it was created after the fact, as the term "virus" itself originates from the biological concept of a virus that infects and spreads.

A computer virus is a type of software designed to replicate itself and spread to other computers, often causing harm or unwanted behavior in the process. It is not hardware, a microorganism, or a non-living cell, but malicious software that can disrupt or damage computer systems.

Antivirus is a type of utility software. It is designed to detect, prevent, and remove malicious software (viruses, malware) from a computer. Utility software helps maintain the health and performance of a computer system.

System software refers to software that manages and operates the hardware of a computer, such as operating systems.

Application software is designed to help users perform specific tasks (e.g., word processors, browsers).

Publishing software is used for creating printed materials, such as brochures, magazines, and books.

Oracle is a company known for its database management systems and enterprise software solutions, not antivirus software.

Avira, Kaspersky, and e-scan are all well-known antivirus software programs used to detect and protect against viruses and other types of malware.

System Software are Macintosh, DOS, Unix, Windows.

A megabyte (MB) is traditionally equal to 1,024 kilobytes (KB) in the binary system used by computers. This is based on powers of 2, where 1 MB = 2^10 KB = 1,024 KB.

1,000 KB is sometimes used in the decimal system (based on powers of 10), but the correct and commonly accepted definition in computing is 1,024 KB.

In MS Word, pressing the F8 key three times in succession selects a sentence. Here’s how it works:Pressing F8 once selects a word. Pressing F8 twice selects a paragraph.

In MS Word, pressing the F8 key three times in succession selects a sentence. Here’s how it works:

Pressing F8 once selects a word.

Pressing F8 twice selects a paragraph.

Pressing F8 three times selects a sentence.

Pressing F8 three times selects a sentence.

A Deque (Double-Ended Queue) is a data structure that allows elements to be added or removed from both ends, making it versatile. It can be used as both a stack (LIFO: Last In, First Out) and a queue (FIFO: First In, First Out), depending on how elements are inserted and removed.

A switch is a network device that operates at the data link layer (Layer 2) of the OSI model. It forwards data between devices within a local area network (LAN) based on MAC addresses. When a device sends data to another device on the same network, the switch uses the destination MAC address to forward the data to the correct node.

         A gateway is used to connect different networks (often different types of networks) and operates at the network layer or above, not             based on MAC addresses.

         A hub is a basic network device that broadcasts data to all connected devices; it does not direct traffic based on MAC addresses.

         A router operates at the network layer (Layer 3) and forwards data based on IP addresses, not MAC addresses.