Explanation

Octal numbers are base 8, meaning they use 8 distinct symbols: 0, 1, 2, 3, 4, 5, 6, and 7.

Explanation

• HTTPS (Hypertext Transfer Protocol Secure) is an extension of the Hypertext Transfer Protocol (HTTP) used for secure communication over the internet.
• It combines HTTP with an additional security layer, typically Secure Sockets Layer (SSL) or Transport Layer Security (TLS), to encrypt and protect the data being transmitted between a website and a user's browser.

Explanation

• The correct answer is: Dept_id should not be used in group by clause (although this is not the case in the given query, as it uses dept_name)
• The error in the statement is that the ID column is not included in the GROUP BY clause. When using an aggregate function like AVG, all non-aggregated columns in the SELECT clause must be included in the GROUP BY clause.

Explanation

Spanning Tree Protocol (STP) is a network protocol that ensures a loop-free topology in a switched LAN (Local Area Network) with redundant paths. Its primary purpose is to prevent switching loops, which can cause network instability, packet duplication, and broadcast storms.

STP achieves this by:

• Creating a spanning tree topology
• Blocking redundant paths
• Ensuring a single path for data transmission

By preventing switching loops, STP ensures a stable and efficient network operation.

Explanation

Disk Cleanup is a useful tool for maintaining and optimizing the storage space on a Windows computer.

Purpose: Disk Cleanup is designed to help users reclaim disk space by removing unnecessary files from their computers.

Explanation

The first screen that appears when you turn on Windows.

The Welcome screen lists all the accounts on the computer.

Explanation

A type of network that is connected by physical switches is called a Switched Network.

Explanation

There are three logical operators: and , or , and not .

Explanation

The most commonly used cursor shape is an arrow.

Explanation

Program can be remove and add