Abbreviations, Memory & Number Systems — IBPS PO
This closes out the small computer block: abbreviations (the full-forms IBPS loves to ask), the memory types and units, and basic number-system conversions. All of it is pure, finite recall — there's nothing to reason out, just a compact list to lock. Because banking abbreviations overlap here too (many "full-form" questions blur computer and banking), a short revision covers a surprising number of one-mark questions. Learn the list, and these are near-free.
1. What IBPS actually asks
- Abbreviations: "the full form of CPU / RAM / HTTP / GUI …".
- Memory: volatile vs non-volatile, the hierarchy, and units (KB, MB, GB…).
- Number systems: binary/decimal/hex conversions and the four bases.
2. High-frequency computer abbreviations
| Abbr. | Full form |
|---|---|
| CPU | Central Processing Unit |
| RAM / ROM | Random Access Memory / Read Only Memory |
| GUI | Graphical User Interface |
| OS | Operating System |
| HTTP / HTTPS | HyperText Transfer Protocol (Secure) |
| URL | Uniform Resource Locator |
| HTML | HyperText Markup Language |
| USB | Universal Serial Bus |
| Portable Document Format | |
| LAN / WAN | Local / Wide Area Network |
| ALU | Arithmetic Logic Unit |
| BIOS | Basic Input Output System |
| ISP | Internet Service Provider |
| PNG / JPEG | Portable Network Graphics / Joint Photographic Experts Group |
| SIM | Subscriber Identity Module |
3. Banking–tech abbreviations (the overlap)
Many "full-form" questions sit between computer and banking awareness — worth knowing both:
- UPI — Unified Payments Interface; IMPS — Immediate Payment Service; NEFT — National Electronic Funds Transfer; RTGS — Real Time Gross Settlement.
- IFSC — Indian Financial System Code; MICR — Magnetic Ink Character Recognition.
- OTP — One Time Password; CVV — Card Verification Value; PIN — Personal Identification Number.
- NPCI — National Payments Corporation of India.
These double as banking-awareness answers — a single revision loop covers questions in both sections.
4. Memory — types & units
- Primary memory: RAM (volatile, working memory) and ROM (non-volatile, firmware).
- Cache: small, ultra-fast memory between the CPU and RAM.
- Secondary storage: HDD, SSD, USB, optical — large, non-volatile, permanent.
- Hierarchy (fast/small → slow/large): Registers → Cache → RAM → Secondary storage.
Units (smallest → largest): bit → byte (8 bits) → KB → MB → GB → TB → PB, each step ×1024 (2¹⁰).
5. Number systems
- Bases: binary (2), octal (8), decimal (10), hexadecimal (16). Hex digits: 0–9 then A–F (A=10 … F=15).
- Binary → decimal: sum the place values (powers of 2).
1010₂ = 8+0+2+0 = 10. - Decimal → binary: divide by 2, read remainders upward.
10 = 1010₂. - Hex quick: each hex digit = 4 binary bits.
F = 1111,A = 1010.
Solved examples
Q1 (abbr). The full form of GUI is:
Show explanation
Solution. Graphical User Interface.
Q2 (abbr, banking overlap). IFSC stands for:
Show explanation
Solution. Indian Financial System Code.
Q3 (memory). The smallest unit of computer memory is a:
Show explanation
Solution. Bit (8 bits = 1 byte).
Q4 (units). 1 GB equals how many MB (computing convention)?
Show explanation
Solution. 1024 MB.
Q5 (number). Convert 1010₂ to decimal.
Show explanation
Solution. 8 + 0 + 2 + 0 = 10.
7. The protocol
- Lock the high-frequency abbreviations (computer + banking-tech overlap) as a single list.
- Fix the memory hierarchy and volatility (RAM volatile, ROM non-volatile) and the ×1024 unit ladder.
- Practise a few binary/decimal/hex conversions so they're instant.
- Revise the abbreviation list in the same loop as banking awareness — it scores in both.
- Cap prep at one short session — it's pure recall; over-investing steals time from higher-weight topics.
