Explanation

• ROM (Read Only Memory) is a non-volatile storage device.
• It stores data permanently even without power.

Additional information:

• RAM (Random Access Memory) is a volatile storage device.
• It loses data when power is off.

Last verified on 17-06-2026

Explanation

• A firewall’s main function is to prevent or block unauthorized access to a computer network.
• It acts as a security barrier between trusted and untrusted networks (like the internet).
• It filters incoming and outgoing network traffic based on security rules.
• It helps protect systems from hackers and unwanted access attempts.

Last verified on 10-06-2026

Explanation

• FTP (File Transfer Protocol) is specifically designed to transfer files between computers over the internet.
• It allows uploading, downloading, and managing files on remote servers.

Last verified on 13-09-2026

Explanation

• The SQL command used to retrieve data from a database table is the SELECT statement.
• This command is fundamental to the Data Query Language (DQL) in SQL.

Last verified on 07-06-2026

Explanation

• Ctrl + K → Insert Hyperlink

Additional information:

• Ctrl + P → Print
• Ctrl + F2 → Print Preview
• Ctrl + H → Replace dialog box
• Ctrl + D → Font dialog box

Last verified on 06-07-2026

Explanation

• An Operating System (OS) is system software.
• It manages computer hardware and provides a platform for running application software.
• It acts as an interface between the user and computer hardware.

Functions of an Operating System:

• Allocates resources
• Monitors activities
• Manages disks and files

Last verified on 02-07-2026

Explanation

• Gateway — connects networks with different protocols; performs protocol conversion (works up to the application layer).

Additional information:

• Bridge — connects networks using the same protocol (data link layer).
• Router — connects networks using the same protocol, typically IP (network layer).

Last updated NA on 10-09-2026

Explanation

• A half-byte, also known as a nibble.
• Size: It consists of 4 bits, which is exactly half of an 8-bit byte.
• It can represent 16 different values, from 0000 to 1111.
• It is also called a tetrade, quadbit, or semi-octet

Last updated NA on 10-09-2026

Explanation

• Compiler/Windows XP is not hardware; it is software.
• Compiler: A program that translates computer code into machine language.
• Windows XP: An operating system that runs computer programs.

Additional information:

• CPU, RAM, Hard Disk, Monitor, and Chip are all hardware.
• A compiler is software that converts code into machine language.
• Windows XP is an operating system.

Last updated by NA on 09-09-2026

Explanation

• Access time is the time required by a computer to locate and access data.
• It is an important measure of the speed of memory or storage devices.
• Lower access time generally means faster data retrieval.

Last verified on 08-09-2026