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Bit is the smallest unit of data in the computer. It can either be 0 or 1.8 Bits are equal to 1 byte.
Byte is the basic unit used to measure memory. To represent huge data, we have different units
to measure as listed below:
1 Byte 8 Bits
1 Kilobyte (KB) 1024 Bytes
1 Megabyte (MB) 1024 KB
1 Gigabyte (GB) 1024 MB
1 Terabyte (TB) 1024 GB
WHAT DOES STARTING A COMPUTER MEAN?
The process of starting a computer means Booting. It involves the process of turning on the
machine and allowing it to load the operating system so that you can begin working. Follow the
given steps to start a computer:
1. Press the main power switch.
2. Press the power button of the Uninterruptible Power Supply (UPS) if connected.
3. Press the power button on your computer or laptop.
4. You will see a start-up screen. The computer checks its hardware components (like CPU,
RAM, and keyboard) to ensure they are functioning properly. This is a quick check, and if
everything is good, the process continues. This is known as POST (Power On Self Test). After
the hardware check, the computer loads the operating system (like Windows or macOS). This
is where you might see a loading screen with a logo or spinning circle.
5. Once the operating system is loaded, you will see the login screen where you enter your user
name and password. After logging in, your computer will load the desktop, and now you are
ready to start using your computer.
DISK SPACE MANAGEMENT
Disk Space Management involves organising and optimising the storage space on your
computer. It includes techniques like regularly deleting unnecessary files, clearing temporary
data, uninstalling unused programs, and managing large files. Windows 11 offers tools like
Disk Cleanup, which help automate the process by removing junk files and temporary items.
Disk Cleanup
Disk Cleanup is a built-in utility in Windows designed to help users free up disk space by removing
unnecessary or temporary files from their computer. It targets various types of files that are safe
to delete, such as temporary Internet files, system cache files, old Windows update files, and
more. Running Disk Cleanup regularly can help ensure that your disk does not become cluttered
with unnecessary files, thereby improving system responsiveness and efficiency.
Follow these steps to open Disk Cleanup:
Step 1: Click on the Start button.
Step 2: Type Disk Cleanup in the search box.
18 Information Technology (V5.0)-VI

