Explanation

Explanation

Binary numbers are made up of only two digits: 0 and 1.

Only 1001 consists solely of 0s and 1s, making it a binary number.

Explanation

In MS-Excel, the "Undo" command allows you to reverse recent actions, such as accidental deletions or changes to the data on the sheet.

It is the quickest way to restore a record immediately after it has been erased.

Explanation

BASIC (Beginner's All-Purpose Symbolic Instruction Code) is a high-level programming language designed for beginners to learn programming easily.

It was developed in the 1960s to make computer programming accessible to non-experts.

Explanation

Explanation

Locking the aspect ratio ensures that the graphic's proportions remain the same when resized.

This prevents the graphic from becoming distorted or stretched.

Explanation

In an email address, the "@" symbol separates the local part (username) from the domain part (service provider's name).

For example, in "user@example.com", "user" is the local part, and "example.com" is the domain part, indicating the email service provider. 

Explanation

Robotics uses information systems to design, build, and operate robots that automate tasks.

Robotics enables activities to be done cheaper, faster, more accurately, and consistently, improving efficiency and productivity.

Explanation

Syntax refers to the rules and structure of data, including the format, order, and organization of data elements.

Syntax defines how data is represented, stored, and transmitted.

Explanation

If a computer virus corrupts the File Allocation Table (FAT) on a DOS system, the operating system will be unable to retrieve any data from the disk.

The FAT is a critical data structure that keeps track of the location of files on the disk, and if it becomes corrupted, the system will not be able to access the data.