Explanation

r is the carriage return escape sequence, which moves the cursor to the beginning of the current line.

It does not move to the next line, unlike n (newline).

Explanation

The MAC (Media Access Control) sub-layer is part of the Data Link Layer (Layer 2) of the OSI model.

It handles how devices access and control the transmission on the physical medium, such as Ethernet.

Explanation

 For calculating monthly salary and other expenditures in an office, the most suitable software for the Account Department would be  Microsoft Excel. 

Explanation

The "show interfaces" command displays the configurable parameters and statistics of all interfaces on the router, including:

• Interface status (up or down)
• IP address and subnet mask
• Speed and duplex settings
• Number of packets received and transmitted
• Number of errors and collision- And other interface-specific settings and statistics

Explanation

A printer driver is a piece of system software that allows your computer to interact with your printer.

Explanation

In computing, an expansion card is a printed circuit board that can be inserted into an electrical connector, or expansion slot on a computer's motherboard.

Explanation

High-level programs are much easier to understand than assembly language ones.

Explanation

 The system keeps track of files and directories using inodes.

An inode is a representation of a file that stores all the data belonging to that file, such as owner, type, size, access permissions, access times and the file's layout on disk.

Explanation

• The Cut feature allows you to remove selected text from the document and temporarily place it on the Office Clipboard.
• The Paste feature allows you to get text from the clipboard and place it in the same or even another document.
  
  

Explanation

A source document is a document in which data collected for a clinical trial is first recorded.