Explanation

Explanation

In the relational model of databases, a primary key is a specific choice of a minimal set of attributes that uniquely specify a tuple in a relation.

Informally, a primary key is "which attributes identify a record", and in simple cases are simply a single attribute: a unique id.

A field is also known as a column

that stores the same type of data and hence can be called a category of data.

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vu FIA CBT PAPER 15-12-2021

Explanation

When you decide to back up your data, the first thing to choose is the storage device or backup media to use for your backups.

There are many data storage devices in the market such as tape drives, optical drives, SD cards, hard disk drives and cloud storage services.

Explanation

USB stands for Universal Serial Bus.

USB is a device used to carry data from one to another computer. 

Explanation

Hyphen (-) is used to select range for printing a document

Ctrl + P is used to print a document

Explanation

A computer program is written using a set of codes (instructions) that the computer can understand.

These codes are composed of programming languages made up of symbols, words, and syntax, but collectively called codes.

Explanation

SMTP pushes email messages to the server.

SMTP is part of the application layer of the TCP/IP protocol.

SMTP is used for sending emails while POP is used for receiving emails.

SMPT: Simple Mail Transfer Protocol

POP: Post Office Protocol

Explanation

Clip art is a collection of pictures or images that can be imported into a document or another program

The images may be either raster graphics or vector graphics.

Explanation

Explanation

The <sub> tag is used to display text below the normal line, as in subscript (e.g., x₅).

Commonly used in chemical formulas and mathematical expressions.