Explanation

The Kernel (operating system) is the core part of an operating system.

It manages:

• CPU (processor)

• Memory (RAM)

• Input/Output devices

• Hardware resources

The kernel acts as a bridge between hardware and software.

Last updated 15-feb-2026

Explanation

The fork (system call) system call is used in Unix to create a new process.

• It creates a child process that is an exact copy of the parent process.

• After fork(), both parent and child processes run independently.

  
  

  Last updated 15-feb-2026

Explanation

In Windows 10, File History is a built-in backup feature.

It allows users to:

• Automatically back up personal files

• Restore previous versions of files

• Recover deleted documents

It is available under Backup Settings in Windows 10

Last updated 15-feb-2026

Explanation

A checkpoint is a saved state of a system, database, or process.

• In databases, it saves the current state so recovery can start from that point.

• In operating systems, it helps restore the system after failure.

It improves reliability and recovery speed.

Last updated 15-feb-2026

Explanation

Files are recognized by their file extension, which appears after the dot (.) in a filename.

For example:

• document.docx → Word file

• image.jpg → Image file

• program.exe → Executable file

The extension tells the operating system which program should open the file.

Last updated 15-feb-2026

Explanation

Sheet (5 letters): When you open a table or query results, Access displays the data in "Datasheet view,"

Additional information:

Explanation

With your document open, select the "References" tab on the ribbon, then select "Table of contents.

Last updated 15-feb-2026

Explanation

• Next Sheet: Ctrl + Page Down
• Previous Sheet: Ctrl + Page Up

Last updated 15-feb-2026

Explanation

An Excel workbook is a collection of worksheets 

It can also contain charts, macros, and other data

A workbook is the Excel file itself, typically with an .xlsx extension.

Contents: It holds one or more worksheets (grid-based spreadsheets).

Last updated 15-feb-2026

Explanation

An MS Excel sheet (or worksheet) consists of rows and columns that intersect to form cells

• Cells: The basic unit of an Excel sheet, where data is entered. 
• Rows: Horizontal lines that run across the sheet, numbered sequentially. 
• Columns: Vertical lines that run down the sheet, identified by alphabetical letters. 
• Workbook: A collection of one or more worksheets within a single Excel file. 

Last updated 15-feb-2026