Computer Awareness

About 6 min · General Awareness · English

Time worked out from the lesson's 414 words at 150 words a minute, plus a minute for each question.

This topic requires straightforward factual recall rather than deep technical understanding. Questions are direct: "What is ROM?", "Expand MODEM", "Which software is used for ___?", or "The brain of the computer is ___". Since each question carries equal marks, mastering this high-recall, low-complexity section ensures quick scoring. Focus on standard definitions, component functions, file extensions, and IT abbreviations.

Key ideas

Computer definition: An electronic device that accepts input (data), processes it using stored instructions (program), stores results, and produces output. It works on IPO cycle: Input → Process → Output.
Hardware vs Software: Hardware is the physical, tangible part you can touch (keyboard, monitor, CPU chip). Software is the intangible set of instructions (programs) that tells hardware what to do. Neither functions without the other.
Central Processing Unit (CPU): Called the "brain of the computer." Contains ALU (Arithmetic Logic Unit) for calculations and CU (Control Unit) for instruction coordination. Modern CPUs: Intel Core i3/i5/i7, AMD Ryzen series.
Memory hierarchy: Primary memory (RAM, ROM, Cache) is fast, volatile (except ROM), and directly accessible by CPU. Secondary memory (HDD, SSD, pendrive, CD) is slower, non-volatile, used for permanent storage.
Operating System (OS): System software that manages hardware, runs applications, provides user interface. Examples: Windows 10/11, Linux, macOS, Android, iOS. Functions: memory management, file management, device management, security.

Watch out for

Confusing RAM with ROM: Students mix volatility. Remember: RAM is temporary (volatile), like short-term memory; ROM is permanent (non-volatile), like long-term memory. RAM needs power to hold data.
Thinking CPU and processor are different: They are the same. CPU = Central Processing Unit = Processor = Microprocessor. Don't treat them as separate components.
Mixing up HTTP and HTML: HTTP is the protocol for transferring data over the web. HTML (HyperText Markup Language) is the language used to write web pages. HTTP delivers HTML files.

Quick reference

CPU = Brain of computer; performs calculations and controls operations.
Operating System examples: Windows, Linux, macOS, Android, iOS, Unix.
RAM = Volatile (loses data on power-off); ROM = Non-volatile (retains data).
Input devices: Keyboard, mouse, scanner, mic. Output devices: Monitor, printer, speaker.
WWW = World Wide Web; HTTP/HTTPS = protocols for web communication.

Check yourself: 3 questions

1. Which of the following is an example of system software?
2. What does the abbreviation 'URL' stand for in the context of internet?
3. In MS Excel, which function is used to find the largest value in a range of cells?

This lesson is cut from the topic's note, not rewritten. Fact-checked on 17 Oct 2026: an AI-assisted check of this note against cited sources; the errors it found were corrected that day. Some errors may remain. The questions are from Shishya's validated question bank.

Read the full note Flashcards for this topic

Saved for offline

Saves this lesson and its 3 questions in this browser on this phone. No sign-in; nothing about you is saved or sent. A saved copy is not updated until you save it again. Parts that load from the server when you use them (the AI tutor, adaptive practice, sign-in) still need a connection.