Explanation

MAN stands for Metropolitan Area Network.

Explanation

The data dictionary is a part of a DBMS that stores metadata — details like table names, field names, data types, constraints, and relationships.

It helps the system manage and understand the structure of the database.

Explanation

A primary key must be unique for each record and never change.

Zip code is not unique (many people can share the same zip code), so it's not suitable as a primary key.

Explanation

Bridges are used to connect similar LANs that use the same network protocols.

They help manage traffic and reduce collisions by dividing networks into segments.

Explanation

Beeps or failure to boot can indicate a hardware or firmware issue, which is typically reported by the BIOS (Basic Input/Output System) or UEFI (Unified Extensible Firmware Interface) firmware during the boot process.

Explanation

• Adobe Photoshop is the most frequently used graphics software.
• Photoshop is the industry standard for raster graphics editing, used for photo editing, digital painting, and graphic design.
• Its versatility and wide range of features make it the go-to choice for professionals and hobbyists alike.

Explanation

• A data mart is a subset of a data warehouse that is focused on a specific functional area or department, such as marketing, sales, or finance.
• It contains a subset of the data warehouse's data, but is designed to be more accessible and user-friendly for a specific group of users.

Explanation

Cache memory is the fastest system memory, required to keep up with the CPU as it fetches and executes instructions.

Explanation

 A computer system consists of a computer case, a power supply unit, a motherboard, a CPU, main memory, and a hard disk drive. Input devices include a keyboard, mouse, microphone, video camera, and image scanner.

CPU: Central Processing Unit

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