Explanation

• SDLC stands for Software Development Life Cycle.
• SDLC is a structured process for developing software efficiently.
• It defines stages from planning to maintenance.
• Ensures software is high-quality, cost-effective, and meets requirements.
• Common phases: Requirement Analysis → Design → Implementation → Testing → Deployment → Maintenance.

Last verified on 07-02-2026

Explanation

• Resolution determines the clarity and detail of the display.
• Higher resolution = more pixels on the screen.
• More pixels produce a sharper and clearer image.

Last verified on 07-02-2026

Explanation

• A microprocessor follows the instruction cycle.
• First it fetches the instruction from memory.
• Then it decodes the instruction to understand it.
• Finally it executes the instruction.
• This cycle repeats for every program step.

Last verified on 07-02-2026

Explanation

• Networks are classified by geographical coverage.
• LAN covers a small area like a room or building.
• MAN covers a city.
• WAN covers countries/continents.
• Internet is the largest global network.

Last verified on 07-02-2026

Explanation

• NIC stands for Network Interface Card.
  • It connects a computer to a network or internet.
  • It can be wired (Ethernet) or wireless (Wi-Fi).
  • Every NIC has a unique MAC address.
  • It enables data communication between devices.

Last verified on 07-02-2026

Explanation

• A microprocessor’s clock speed is measured in Hertz (Hz).
• Hertz means cycles per second.

Additional information:

• Higher clock speed = more instructions processed per second.
• Modern CPUs work in GHz (gigahertz).

Last verified on 07-02-2026

Explanation

• An algorithm is a step-by-step set of rules to solve a problem.
• It is used in programming and computer science.
• Algorithms must be clear, finite, and logical.
• Every computer program is based on an algorithm.
• It works like a recipe to reach a solution.

Last verified on 07-02-2026

Explanation

• FILO (First In Last Out) means the first inserted item is removed last.
• This behavior matches a Stack data structure.
• Stack works on push and pop operations.
• It is used in function calls and undo operations.
• Elements are accessed only from the top.

Additional information:

• Stack — FILO / LIFO
• Queue — FIFO

Last verified on 07-02-2026

Explanation

• A hard disk stores much more data.
• It is the main secondary storage device in computers.
• Modern hard disks store data in gigabytes to terabytes.

Additional information:

• Hard disk — 500 GB to 20+ TB
• Flash drive — 16 GB to 1 TB
• RAM — 4 GB to 64 GB
• ROM — few MBs to GBs
• SSD (for comparison) — 256 GB to 8 TB

Last verified on 07-02-2026

Explanation

• An input device sends data to the computer.
• A camera (webcam) captures images/videos and inputs them into the system.

Additional information:

• Input devices help users enter data and commands.
• Camera is used in video calls and image capture.
• Monitor, printer, and speaker are output devices.

Last verified on 07-02-2026