Judiciary & Election Commission — Powers & Procedures

Why This Chapter Matters

SSC MTS and CHSL papers usually carry 4 to 6 questions on computer awareness, and here is the good news: this is the easiest scoring section in the whole General Awareness paper. History needs memorising dates across centuries. Computer awareness needs you to understand a machine you already touch every single day on your phone. The facts are limited, the questions repeat old patterns, and once you know the basic parts of a computer and a handful of internet terms, you can answer confidently instead of guessing.

The biggest mistake aspirants make here is treating this topic like it is optional, something to "revise later" because "everyone knows computers." That confidence is exactly why students lose easy marks. They confuse RAM with storage, mix up hardware with software, or cannot tell a browser from a search engine. This chapter fixes all of that in plain language, using things from your own daily life, so nothing feels foreign. By the end, you will look at your own phone or the cyber cafe computer and be able to name every part being tested.

1. What Is a Computer?

A computer is a machine that takes information in, processes it according to instructions, and gives out a result. That is it. Strip away the wires and screens, and every computer, from a supercomputer to your smartphone, does the same three-step job: Input, Process, Output.

Think of a computer like a dhaba kitchen. The waiter brings in your order (input). The cook follows a recipe and prepares the dish using the ingredients (processing). The waiter serves you the finished plate (output). A computer works exactly this way: you type or click (input), the computer's brain works on it (processing), and you see the result on screen or on paper (output).

There is a fourth step examiners love to test: storage. Just as a dhaba stores extra ingredients in a fridge for later use, a computer stores data and instructions for future use. So the complete cycle tested in exams is: Input → Process → Output → Storage.

Exam trap: Many students write only "input, process, output" and forget storage as the fourth basic function of a computer. SSC questions often ask "which of the following is NOT a basic function of a computer" with storage hidden as the correct answer choice testing whether you know all four.

Characteristics of a Computer

Examiners like asking why computers are useful. Four properties are commonly tested:

• Speed: A computer performs calculations in microseconds or even faster.
• Accuracy: Computers do not make careless mistakes; errors usually come from wrong data or wrong programs fed by humans, a rule called GIGO — Garbage In, Garbage Out.
• Storage: A computer can hold enormous amounts of data permanently.
• Diligence: Unlike humans, a computer never gets tired or bored doing the same task a million times.

Memory hook: Remember SASD — Speed, Accuracy, Storage, Diligence — like the initials of a reliable friend who is fast, correct, has a good memory, and never complains.

2. Hardware — The Physical Parts You Can Touch

Hardware means every physical part of a computer, anything you could physically pick up and hold. Think of hardware as the human body: the parts you can touch, see, and feel.

The CPU — The Brain

The CPU (Central Processing Unit) is often called the brain of the computer. It is the component that actually processes instructions and performs calculations. Every click, every keystroke, every command eventually reaches the CPU, which decides what to do next.

The CPU itself has two key parts worth remembering for exams:

• ALU (Arithmetic Logic Unit): handles all mathematical calculations and logical comparisons (like checking if one number is greater than another).
• CU (Control Unit): directs traffic inside the computer, telling other parts when to work, like a traffic constable at a busy Delhi crossing managing the flow of vehicles without doing any driving itself.

Picture the CPU as the head chef of a big wedding catering team. The chef does not chop every vegetable personally, but every dish that goes out is decided and directed by the chef. That is exactly the CPU's role: it directs and calculates, while other parts do supporting jobs.

RAM — The Temporary Work Desk

RAM (Random Access Memory) is where the computer keeps data it is actively working on right now. The moment you switch off the computer, everything in RAM disappears. This is why RAM is called volatile memory.

Think of RAM as your study table at home. When you sit to study, you spread out the books, notebooks, and papers you need right now. Once you finish and clear the table, everything goes back to the shelf. RAM works the same way: it holds only what is being used at that moment, and clears out when the power goes off.

Exam trap: Students often confuse RAM with storage (hard disk). Remember: RAM is temporary, storage is permanent. A question like "Data is lost from this memory when the computer is switched off" is always pointing to RAM, never to a hard disk or pen drive.

ROM — The Permanent Instruction Booklet

ROM (Read Only Memory) stores instructions that do not change and do not vanish when power is switched off. This is called non-volatile memory. ROM typically holds the basic startup instructions a computer needs the moment it is switched on, before the operating system even loads.

Think of ROM like the instruction manual glued inside a pressure cooker's box. It stays with the cooker permanently and tells you the basic safety steps every single time, whether the stove is on or off.

Storage Devices — The Almirah

Storage devices (also called secondary memory) hold your files, photos, songs, and software permanently, even when the computer is switched off. Common examples tested in exams:

Storage Device	Common Use
Hard Disk Drive (HDD)	Main permanent storage inside desktops and laptops
Solid State Drive (SSD)	Faster, newer alternative to HDD, no moving parts
Pen Drive / USB Drive	Small, portable storage carried in your pocket
CD/DVD	Older optical storage, largely replaced today
Memory Card	Used in cameras and phones for extra storage

Storage is like your home's almirah. Whatever you put inside stays there even after you switch off the lights and leave the house. RAM, on the other hand, is like the table you are working on right now; clear the table (switch off power), and nothing remains.

Input and Output Devices

Input devices send information into the computer. Output devices show or give out results from the computer.

Input Devices	Output Devices
Keyboard	Monitor (screen)
Mouse	Printer
Scanner	Speaker
Microphone	Projector
Webcam	Headphones

A few devices do both jobs. A touchscreen takes your touch (input) and also displays the picture (output). A modem sends and receives data both ways. Such devices are called input-output devices.

Memory hook: For input devices, remember "KMS goes in" — Keyboard, Mouse, Scanner send things IN. For output, remember "MPS comes out" — Monitor, Printer, Speaker bring things OUT to you.

3. Software — The Instructions Behind the Scenes

If hardware is the body, software is the mind, the set of programs and instructions that tell hardware what to do. You cannot touch software; you can only see its effect on screen.

Software is broadly divided into two types.

System Software

System software manages the computer itself and lets other programs run. The most important example is the Operating System (OS), the master program that controls all hardware and software resources. Common operating systems tested in exams: Windows, Linux, macOS, Android, iOS.

Think of the operating system as the building manager of a large apartment complex. The manager does not live in any one flat but controls water supply, electricity, and security for the whole building, so that every resident (every other program) can function smoothly. Without the manager, chaos follows; without an OS, a computer cannot even start.

Application Software

Application software is built for specific tasks that the user directly wants to do: writing a letter, editing a photo, browsing the internet, or playing a song. Examples: MS Word, MS Excel, Google Chrome, VLC Media Player, WhatsApp.

Exam trap: A very common trick question asks you to identify which item in a list is an operating system versus an application. Remember: Windows, Linux, and Android manage the computer (system software). Word, Excel, and Chrome do a specific job for the user (application software).

4. Internet Basics

The internet is a global network connecting millions of computers so they can share information. It did not exist as something you "log into" one day; it grew from smaller networks connecting over decades, and today it carries everything from your exam form submission to a video call with family.

Browser

A web browser is software used to access and view websites on the internet. Popular browsers tested in exams: Google Chrome, Mozilla Firefox, Microsoft Edge, Safari, Opera.

Think of a browser as a rickshaw that takes you around the internet city. You tell the rickshaw where you want to go (type a website address), and it takes you there and shows you what is at that location.

Search Engine

A search engine is a website that helps you find other websites and information by typing keywords. Google, Bing, and Yahoo are the most tested examples.

Exam trap: Students often think "browser" and "search engine" mean the same thing. They do not. The browser is the vehicle; the search engine is the guide inside that vehicle who helps you find an address. You open Chrome (browser) and then use Google (search engine) inside it to find information.

Website, Webpage, and URL

A website is a collection of related webpages under one address, like a whole shop. A webpage is a single page within that website, like one shelf in the shop. The URL (Uniform Resource Locator) is the exact address you type to reach a webpage, similar to a house address with a street name and number.

Email

Email (electronic mail) lets you send messages and files over the internet instantly. Popular email services tested: Gmail, Yahoo Mail, Outlook. An email address always has the format username@domain, for example, a person's name followed by "@gmail.com". The @ symbol separates the user's name from the mail provider, similar to how a house number and a colony name together make a full postal address.

Key email terms often asked in exams:

• Inbox: where received messages arrive
• Sent: messages you have sent
• Spam/Junk: unwanted or suspicious messages filtered out automatically
• CC (Carbon Copy): sends a visible copy to additional people
• BCC (Blind Carbon Copy): sends a hidden copy; other recipients cannot see this person received it
• Attachment: a file added to an email, like a photo or PDF

Common Internet Terms

Term	Simple Meaning
Wi-Fi	Wireless technology to connect devices to the internet without cables
Download	Copying a file from the internet onto your device
Upload	Sending a file from your device onto the internet
Hyperlink	Clickable text or image that takes you to another webpage
Cookie	A small file websites store on your device to remember your preferences
Browser history	List of websites you have visited earlier
Bookmark	A saved shortcut to a webpage you want to visit again quickly

5. Basic MS Office Concepts

MS Office is a suite (a bundled set) of application software made for common office tasks. The two most tested programs are MS Word and MS Excel.

MS Word — For Writing

MS Word is a word processor, used to create, edit, and format text documents like letters, resumes, and reports. Files created in Word are usually saved with the extension .docx (older versions used .doc).

Common Word features tested in exams:

• Font: the style and size of text
• Bold, Italic, Underline: basic text formatting, often shown as shortcut keys Ctrl+B, Ctrl+I, Ctrl+U
• Cut, Copy, Paste: shortcuts Ctrl+X, Ctrl+C, Ctrl+V
• Spell Check: automatically finds spelling mistakes
• Header and Footer: text that repeats at the top or bottom of every page
• Find and Replace: quickly locates a word and swaps it with another (shortcut Ctrl+H)

Think of MS Word as a digital exercise notebook where, unlike a paper notebook, you can erase, rearrange, and reformat your writing endlessly without ever tearing a page.

MS Excel — For Numbers

MS Excel is spreadsheet software, used to organise data in rows and columns and perform calculations. Files are saved with the extension .xlsx (older versions used .xls).

Basic Excel structure tested in exams:

• A spreadsheet is made of cells, arranged in rows (numbered) and columns (lettered).
• Each cell has an address, like A1 or B5, formed by combining the column letter and row number.
• A group of cells together is called a workbook, and each page inside it is a worksheet.
• Common functions: SUM (adds numbers), AVERAGE (finds the mean), MAX and MIN (highest and lowest values).

Think of an Excel sheet as a class attendance register ruled into rows for each student and columns for each date. Every little box, or cell, holds one specific piece of information, and you can total up an entire column in seconds instead of adding by hand.

Exam trap: A common SSC question asks for the file extension of Word versus Excel files. Remember: Word ends in docx (think "docs"), Excel ends in xlsx (think "excel sheet"). Mixing these two up is one of the most common careless errors students make under time pressure.

MS PowerPoint — Brief Mention

MS PowerPoint creates slide presentations, saved with the extension .pptx. Each individual page is called a slide. This is asked less often than Word and Excel but occasionally appears in a mixed question about the Office suite.

6. Basic Cybersecurity Awareness

As more government forms, banking, and communication move online, exam papers increasingly test basic safety awareness. This is practical knowledge you genuinely need, not just exam trivia.

Passwords

A strong password is your first line of defence for any online account. Good practice, often tested indirectly through common sense questions:

• Use a mix of uppercase, lowercase, numbers, and symbols.
• Never use easily guessed details like your date of birth or "123456" as a password.
• Do not share your password with anyone, including someone claiming to be from a bank.
• Use a different password for different important accounts.

Think of a password like the lock on your house door. A flimsy lock that anyone can pick with a hairpin invites trouble. A strong, unique lock keeps your home safe even if someone tries the same key on a neighbouring house.

Safe Browsing Habits

• Do not click on unknown links sent through email or SMS, even if they promise a prize or claim to be urgent.
• Check that a website's address begins with https:// (the "s" stands for secure) before entering sensitive information like bank details.
• Avoid downloading software from untrusted websites, since it may carry a virus or malware.
• Log out of shared or public computers after using email or banking sites, especially in cyber cafes.

Common Threats

Term	Simple Meaning
Virus	A harmful program that spreads and damages files or systems
Malware	General term for any malicious software, including viruses
Phishing	Fake messages or websites designed to trick you into giving away personal information
Antivirus software	A program designed to detect and remove viruses
Firewall	A security system that monitors and blocks unauthorised access to a network

Exam trap: Students sometimes think "virus" and "malware" are two completely different things when malware is actually the umbrella term, and a virus is just one type of malware under that umbrella. If asked which term is broader, the answer is always malware.

7. Computer Generations — Quick Overview

SSC exams occasionally test the basic timeline of computer generations by the technology used inside them.

Generation	Key Technology
First (1940s-50s)	Vacuum tubes
Second (1950s-60s)	Transistors
Third (1960s-70s)	Integrated Circuits (ICs)
Fourth (1970s-present)	Microprocessors
Fifth (present onward)	Artificial Intelligence

You do not need deep detail here, just the sequence and the one keyword tied to each generation, which is usually enough to answer a direct recall question.

Quick Revision — One-Line Facts

• A computer works on the cycle: Input → Process → Output → Storage.
• GIGO means Garbage In, Garbage Out; wrong input gives wrong output.
• The CPU is the brain of the computer, containing the ALU and CU.
• RAM is temporary (volatile) memory; data is lost when power is off.
• ROM is permanent (non-volatile) memory holding basic startup instructions.
• Hardware is the physical, touchable part of a computer.
• Software is the set of instructions that runs on hardware.
• The Operating System manages all hardware and software resources.
• Windows, Linux, and Android are operating systems (system software).
• MS Word, Excel, and Chrome are application software.
• A browser is used to access websites; examples are Chrome, Firefox, Edge.
• A search engine like Google helps find information using keywords.
• URL stands for Uniform Resource Locator, the address of a webpage.
• Email address format is username@domain, using the @ symbol.
• CC sends a visible copy of an email; BCC sends a hidden copy.
• MS Word files are saved with the .docx extension.
• MS Excel files are saved with the .xlsx extension.
• MS PowerPoint files are saved with the .pptx extension.
• In Excel, a cell address combines a column letter and a row number, like B5.
• SUM and AVERAGE are basic Excel functions for calculations.
• Ctrl+C copies, Ctrl+V pastes, Ctrl+X cuts selected content.
• Wi-Fi allows wireless internet connection between devices.
• Download brings a file from the internet to your device; upload sends it the other way.
• A hyperlink is clickable text or image leading to another webpage.
• A virus is a harmful program; malware is the broader category covering all such threats.
• Phishing tricks users into giving away personal information through fake messages or sites.
• Websites beginning with https:// offer a secure connection.
• Antivirus software detects and removes harmful programs from a computer.
• The first generation of computers used vacuum tubes; the fourth uses microprocessors.
• A touchscreen works as both an input and output device.
• Firewall software blocks unauthorised access to a computer network.

Memory Tables

Table 1: Hardware vs Software at a Glance

Feature	Hardware	Software
Can you touch it?	Yes	No
Example	Keyboard, CPU, Monitor	Windows, MS Word, Chrome
Analogy	The human body	The human mind
Fails due to	Physical damage	Bugs, viruses, wrong commands

Table 2: RAM vs ROM vs Storage

Feature	RAM	ROM	Storage (HDD/SSD)
Type	Volatile	Non-volatile	Non-volatile
Data lost on power off?	Yes	No	No
Purpose	Temporary working memory	Basic fixed startup instructions	Permanent file storage
Analogy	Study table	Instruction manual	Home almirah

Table 3: Common File Extensions

Software	File Extension
MS Word	.docx
MS Excel	.xlsx
MS PowerPoint	.pptx
Image file (common)	.jpg / .png
PDF document	.pdf

Practice MCQs

Q1. Which of the following is the correct order of the basic computer functions? (a) Output, Input, Process, Storage (b) Input, Process, Output, Storage (c) Process, Input, Storage, Output (d) Storage, Output, Input, Process

Q2. Which part of the computer is often called its "brain"? (a) RAM (b) Monitor (c) CPU (d) Keyboard

Q3. Which type of memory loses its data as soon as the computer is switched off? (a) ROM (b) Hard Disk (c) RAM (d) Pen Drive

Q4. Which of the following is an example of an input device? (a) Printer (b) Speaker (c) Monitor (d) Scanner

Q5. Which of the following is application software? (a) Windows (b) Linux (c) MS Excel (d) Android

Q6. What does "www" typically stand for in a website address? (a) World Wide Web (b) World Web Wide (c) Web World Wide (d) Wide World Web

Q7. A web browser is mainly used to: (a) Store files permanently (b) Access websites on the internet (c) Perform mathematical calculations (d) Protect against viruses

Q8. Which symbol is used to separate the username from the domain name in an email address? (a) # (b) & (c) @ (d) %

Q9. In MS Excel, the intersection of a row and a column is called a: (a) Field (b) Cell (c) Tab (d) Sheet

Q10. Which file extension is used for MS Word documents by default? (a) .xlsx (b) .pptx (c) .docx (d) .txt

Q11. Which of the following best describes ROM? (a) Temporary memory that clears on restart (b) Permanent memory holding basic startup instructions (c) A type of input device (d) A programming language

Q12. GIGO in computer terminology stands for: (a) Good Input Good Output (b) Garbage In Garbage Out (c) General Input General Output (d) Given Input Given Output

Q13. Which of these terms refers to a fraudulent attempt to obtain sensitive information through fake emails or websites? (a) Firewall (b) Phishing (c) Cookie (d) Bookmark

Q14. Which shortcut key combination is used to copy selected text in most Windows applications? (a) Ctrl+V (b) Ctrl+X (c) Ctrl+C (d) Ctrl+Z

Q15. Which term describes sending a hidden copy of an email to someone, so other recipients cannot see they received it? (a) CC (b) BCC (c) Reply All (d) Forward

Answer Key

Q	Answer	Reason
1	(b)	The basic computer cycle is always Input, then Process, then Output, then Storage.
2	(c)	The CPU processes all instructions and calculations, earning it the nickname "brain."
3	(c)	RAM is volatile memory; its content disappears the moment power is cut off.
4	(d)	A scanner sends data into the computer, making it an input device, unlike printers and monitors which are output devices.
5	(c)	MS Excel performs a specific user task (spreadsheets), making it application software, while Windows, Linux, and Android are operating systems.
6	(a)	"www" stands for World Wide Web, the naming convention seen at the start of many website addresses.
7	(b)	A browser like Chrome or Firefox is the tool used to open and view websites.
8	(c)	The @ symbol always separates the username from the domain in any valid email address.
9	(b)	In a spreadsheet, each box formed where a row meets a column is called a cell.
10	(c)	Modern MS Word documents are saved using the .docx extension by default.
11	(b)	ROM is non-volatile and stores fixed instructions needed at startup, unlike RAM which is temporary.
12	(b)	GIGO means Garbage In, Garbage Out, meaning wrong input always produces wrong output regardless of processing power.
13	(b)	Phishing uses fake communication to trick users into revealing personal or financial information.
14	(c)	Ctrl+C is the standard shortcut for copying selected content in nearly all Windows software.
15	(b)	BCC (Blind Carbon Copy) hides that recipient's presence from everyone else on the email, unlike CC which is visible to all.