Think of a computer as a very disciplined office worker. It has a desk (RAM — where current work sits), a filing cabinet (storage — where everything is saved permanently), a brain (CPU — that actually does the thinking), and a rulebook it follows without question (the operating system). Every piece of physical stuff you can touch is hardware. Every set of instructions that tells the hardware what to do is software.
Here is the central analogy you should lock in: Hardware is the body, Software is the soul. The keyboard, mouse, monitor, CPU chip, and RAM sticks — all hardware. Windows, MS Word, Chrome, a video game — all software.
Now zoom out. Computers do not work in isolation anymore. They talk to each other through networks, and the largest network of all is the internet — a global web of interconnected computers that share data using agreed-upon protocols (rules of communication). When you open a website, you are essentially asking a faraway computer (a server) to send you a file, and your browser displays it.
The internet and the World Wide Web (WWW) are not the same thing. The internet is the infrastructure — the physical cables, routers, and satellites. The WWW is just one service that runs on top of the internet — the system of linked web pages you browse daily. Email, online gaming, and video calls are also internet services but are not part of the WWW.
For SSC MTS, computer questions are factual and direct. They test full forms, inventors, categories, and basic definitions — not how to code or build circuits. You need clean, sharp facts, not deep understanding.
The exam loves generation-based questions. Each generation is defined by the core switching technology:
| Generation | Years | Technology | Example | |---|---|---|---| | 1st | 1940–1956 | Vacuum Tubes | ENIAC | | 2nd | 1956–1963 | Transistors | IBM 1401 | | 3rd | 1964–1971 | Integrated Circuits (ICs) | IBM 360 | | 4th | 1971–present | VLSI / Microprocessors | Intel 4004 | | 5th | Present–future | AI / Parallel Processing | — |
The pattern: each generation made computers smaller, faster, cheaper, and more power-efficient.
Input devices feed data into the computer: keyboard, mouse, scanner, microphone, webcam.
Output devices bring data out: monitor, printer, speaker, projector.
Processing unit: the CPU (Central Processing Unit) — the brain. Inside the CPU are the ALU (Arithmetic Logic Unit, does math and comparisons) and the CU (Control Unit, directs traffic).
Memory:
System Software manages hardware directly. The big one is the Operating System (OS) — Windows, Linux, macOS, Android. The OS sits between you and the hardware, translating your clicks into machine-level instructions.
Utility Software performs maintenance tasks — antivirus, disk defragmenter, file compression tools (WinZip).
Application Software is what end users actually use — MS Word, Excel, Chrome, VLC.
Programming tools include compilers (convert entire source code to machine code at once), interpreters (convert line by line), and debuggers (find and fix bugs/errors in code).
The OS manages files through a file system. When files are open, the OS maintains an Open-File Table — a data structure that keeps track of every file currently being accessed, including position within the file, access mode (read/write), and how many processes have it open.
Process management, memory management, device management, and file management are the four core OS functions.
Protocol = agreed set of rules for communication. Key ones:
URL (Uniform Resource Locator) is the complete address of a resource on the internet. Example: https://www.sarkaririse.com/quiz — every part tells the browser something: protocol, domain, and path.
IP Address — unique numerical label assigned to each device on a network. IPv4 looks like 192.168.1.1; IPv6 is longer to accommodate more devices.
Network types by size: PAN (Personal) → LAN (Local) → MAN (Metropolitan) → WAN (Wide Area Network). The internet is the largest WAN.
| Application | Category | Primary Use | |---|---|---| | MS Word | Word Processor | Writing and formatting documents | | MS Excel | Electronic Spreadsheet | Data, calculations, charts | | MS PowerPoint | Presentation Software | Slideshows | | MS Access | Database Software | Managing structured data | | MS Outlook | Email Client | Email and calendar |
Excel is consistently tested as an electronic spreadsheet — not a financial planning package, not a graphics package.
Remember: V-T-I-M-A — Vacuum tubes, Transistors, Integrated circuits, Microprocessors (VLSI), AI. Say it like a word: "VeTIMA". Each letter = one generation in order. When you see "third generation", immediately think I = Integrated Circuits. Standard recall: 20 seconds. With VeTIMA: 3 seconds.
Ask one question: "Does it survive a power cut?" If YES → non-volatile → ROM (or hard disk or pen drive). If NO → volatile → RAM. The exam almost always asks this distinction. Once you lock this binary test, you eliminate 2 wrong options in under 5 seconds instead of reasoning from scratch each time (which takes 30+ seconds).
Group confusable full forms: U-words: URL = Uniform Resource Locator (not Location — locator finds, location just describes a place). R-words: RAM = Random Access Memory, ROM = Read-Only Memory. The key word in ROM is Only — you can only read, not freely write. Knowing the distinguishing word (Locator, Only) cuts out wrong options immediately. Eliminates 2 of 4 options in 4 seconds vs reading all options carefully in 25 seconds.
Map each Office app to its defining word: Word → Write, Excel → Express numbers (spreadsheet), PowerPoint → Present, Access → Administer data. The W-E-P-A pattern covers all four. When the question asks "Excel is a ___", immediately substitute: E = Express numbers = Electronic Spreadsheet. 3-second answer vs 15-second elimination.
Three-word test: To = Target, CC = Copy (visible), BCC = Blind copy, Attach = Append file. When a question says "send an image with email", the only field that adds a file is Attachment. CC and BCC deal with recipients, not files. Subject is a text label. Eliminate 3 wrong options in 5 seconds.
When you see a Computer & IT question in the exam, run this decision tree in your head:
Step 1 — Identify the question type:
Step 2 — Eliminate before confirming: Most computer questions have two obviously wrong options. Remove those first, then choose between the remaining two using your single distinguishing fact.
Step 3 — Do not overthink: Computer questions in SSC MTS are definition-level. If you are spending more than 20 seconds, you are over-reading. Pick the clean factual answer and move on.
Why this question: Full forms with near-identical wrong options are a classic MTS trap. This tests whether you know "Locator" vs "Location" — one word difference.
Solving path: Options A and C use "Universal" — wrong first word, eliminate immediately. Between B ("Uniform Resource Location") and D ("Uniform Resource Locator") — a URL actively locates a resource, not just states its location. Answer: D.
Why this question: Inventor questions appear in SSC MTS GK almost every year. WWW is one of the most commonly tested inventions.
Solving path: Jan Koum = WhatsApp. John O'Sullivan = Wi-Fi. Steve Jobs = Apple products. None of these relate to the WWW. Tim Berners-Lee is the one name associated with WWW (1989, at CERN). Answer: B.
Why this question: RAM vs ROM distinction is a perennial question. "Static and non-volatile" together uniquely identify ROM.
Solving path: RAM is volatile — eliminated. BIOS is stored on ROM, not ROM itself — eliminated. Cache is volatile — eliminated. ROM is non-volatile (survives power cuts) and static (contents fixed at manufacture). Answer: C.
Why this question: OS internals are tested infrequently but when they appear, they are high-confidence questions because most aspirants skip this area.
Solving path: "Open table" and "open-seek table" and "open-location table" are invented names — eliminate anything that sounds fabricated. The correct OS term is Open-File Table, which maintains entries for all currently open files. Answer: B.
Why this question: Debugger is a clean vocabulary question. The wrong options are invented-sounding words designed to confuse.
Solving path: "Currector" and "Quarantiner" are not real software terms — eliminated immediately. "Evaluator" evaluates but does not specifically find bugs. A Debugger is the established term for a tool that finds and fixes bugs in code. Answer: C.
Confusing the internet with the WWW. The internet is the physical infrastructure. The WWW is one service running on it. Email also uses the internet but is not part of the WWW. Do not treat them as synonyms.
Calling Excel a "Financial Planning Package." Excel is an electronic spreadsheet. Yes, it is used for finance, but its category is spreadsheet. The exam specifically tests this classification because the wrong option "Financial Planning Package" sounds reasonable.
Mixing up CC and BCC. Both copy people on an email. The difference: CC recipients can see each other's addresses; BCC recipients are hidden. Neither CC nor BCC sends a file — only Attachment does that.
Placing VLSI in the third generation. VLSI (Very Large Scale Integration) belongs to the fourth generation, not the third. Third generation = Integrated Circuits (ICs). This is a deliberate trap in options.
Treating BIOS as a type of memory. BIOS is firmware — a program. It is stored on ROM. When asked "which memory is non-volatile and static?", the answer is ROM, not BIOS.
Confusing Compiler and Interpreter. Both convert source code to machine code, but a Compiler does the whole program at once (faster execution), while an Interpreter does it line by line (easier to debug, slower execution). Debugger is a separate tool entirely — it does not compile or interpret.