Explanation

A firewall is a software or firmware that prevents unauthorized access to a network.

A firewall inspects incoming and outgoing traffic using a set of rules to identify and block threats.

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Explanation

File folders are used to organize papers in files, protect papers in files, sort files, and keep files safe and organized.

A folder is a virtual area on a computer where applications, documents, data, and other sub-folders can be stored.ta retrieval. 

Explanation

• Every natural number can be expressed as a ratio of integers (itself divided by 1), making them rational numbers.
• Natural numbers are a subset of rational numbers.

Explanation

The transpose of a row matrix is a column matrix.

Similarly, the transpose of a column matrix is a row matrix.

In essence, when transposing a matrix, you swap rows with columns.

So, a matrix with one row becomes a matrix with one column, and vice versa. 

Explanation

The Arithmetic and Logic Unit (ALU) performs logical operations in the Central Processing Unit (CPU).

An arithmetic-logic unit is the part of a central processing unit that carries out arithmetic and logic operations.

Explanation

She wanted to go to the party but I have to study

A word like "but" would be the correct answer as it is a conjunction.

In this particular set of options, the correct choice is not listed.

Explanation

Machine language is a low-level language

It consists of binary code (0s and 1s) that is directly executed by a computer's CPU.

High-level languages like C, Java, and Fortran are designed to be more user-friendly and abstracted from machine code.

Explanation

He misses his friend a lot.

"He" is third person singular, so the verb "miss" takes an -es ending in the simple present tense:

miss→misses

Explanation

When we use under as a preposition,

it is similar to below.

We use under to talk about something that is below or lower than something else:

The cat is under the table.

Explanation

This book is mine.

"mine" is a possessive pronoun that stands alone and replaces a noun.

The other options are incorrect:

my → possessive adjective (needs a noun after it: my book)

me → object pronoun (e.g., Give me the book.)

I → subject pronoun (e.g., I have the book.)