Software

Key Concepts & Formulas

Provide 5-7 essential concepts for Software:

10 Practice MCQs

Q1. Which of the following is an example of system software? A) Microsoft Word B) Windows 10 C) Adobe Photoshop D) Railway Reservation App

Answer: B) Windows 10

Solution: System software manages computer hardware and provides platform for applications. Windows 10 is an operating system which controls hardware and allows other programs to run.

Shortcut: If it manages your computer or comes pre-installed, it’s likely system software

Concept: Software - System vs Application Software

Q2. The software used to book train tickets on IRCTC website is an example of: A) System Software B) Utility Software C) Application Software D) Firmware

Answer: C) Application Software

Solution: IRCTC booking software is designed for a specific purpose (ticket booking) for end users, making it application software.

Shortcut: User-facing programs = Application Software

Concept: Software - Application Software types

Q3. Which software translates high-level programming language to machine code? A) Assembler B) Compiler C) Antivirus D) Database

Answer: B) Compiler

Solution: A compiler converts entire high-level programs (like C++, Java) into machine language (binary 0s and 1s) that computers can execute.

Shortcut: Compiler = Complete translation at once

Concept: Software - Programming Tools

Q4. A railway station’s automatic announcement system uses pre-recorded messages stored in hardware memory. This is: A) Shareware B) Freeware C) Firmware D) Malware

Answer: C) Firmware

Solution: Firmware is software permanently programmed into hardware devices. Railway announcement systems have message software embedded in their hardware chips.

Shortcut: Permanently embedded software = Firmware

Concept: Software - Firmware characteristics

Q5. If a train simulator software costs ₹5,000 per license and railway training center needs it for 50 computers, but they use open-source alternative saving ₹2,50,000, the open-source software is: A) Shareware B) Proprietary C) Freeware D) Open Source

Answer: D) Open Source

Solution: Open source software is freely available for use, modification, and distribution. The saving of ₹2,50,000 (50 × ₹5,000) indicates zero cost.

Shortcut: Free + Modifiable = Open Source

Concept: Software - Licensing types

Q6. Railway’s freight management system processes 2,000 transactions per hour. If each transaction requires 0.5MB memory, and system uses database software with 20% overhead, total memory needed is: A) 1.2 GB B) 1.5 GB C) 2.0 GB D) 2.4 GB

Answer: A) 1.2 GB

Solution: Base memory = 2,000 × 0.5MB = 1,000MB = 1GB With 20% overhead: 1GB × 1.2 = 1.2GB

Shortcut: Always add 20-25% overhead for database systems

Concept: Software - Database memory management

Q7. A train scheduling software has 500 lines of code. If compiler takes 0.01 seconds per line, interpreter takes 0.05 seconds per line, time difference for 10 program runs is: A) 200s B) 250s C) 400s D) 500s

Answer: C) 400s

Solution: Compiler: 500 × 0.01 = 5s (one-time) Interpreter: 500 × 0.05 × 10 = 250s Difference: 250 - 5 = 245s (closest to 250s)

Shortcut: Compiler faster for repeated runs

Concept: Software - Compiler vs Interpreter efficiency

Q8. Railway’s GPS tracking software updates every 5 seconds for 1000 trains. If each update packet is 2KB, daily data usage is approximately: A) 33.8 GB B) 34.6 GB C) 35.2 GB D) 36.4 GB

Answer: B) 34.6 GB

Solution: Updates per train per day = 86400/5 = 17,280 Total updates = 1000 × 17,280 = 17,280,000 Data = 17,280,000 × 2KB = 34,560,000KB = 34.56GB ≈ 34.6GB

Shortcut: 17,280 updates/day per 5-second interval

Concept: Software - Real-time data processing

Q9. A railway signal control system has redundant software. If primary fails every 1000 hours with 99.9% reliability, and backup has 99.5% reliability, combined system reliability is: A) 99.9995% B) 99.9999% C) 99.9998% D) 99.9997%

Answer: A) 99.9995%

Solution: Primary fails: 0.1% of time Backup takes over: 99.5% success when needed Combined: 99.9% + (0.1% × 99.5%) = 99.9% + 0.0995% = 99.9995%

Shortcut: Add backup success probability to primary

Concept: Software - Reliability engineering

Q10. Train maintenance software follows agile development with 2-week sprints. If each sprint completes 8% of total work, and 40% was pre-completed, number of sprints to finish remaining work is: A) 6 B) 7 C) 8 D) 9

Answer: C) 8

Solution: Remaining work = 100% - 40% = 60% Sprints needed = 60% ÷ 8% = 7.5 ≈ 8 sprints

Shortcut: Round up fractions in project planning

Concept: Software - Development methodology

5 Previous Year Questions

PYQ 1. Which of the following is NOT a system software? A) Windows OS B) Linux C) MS Excel D) Device Driver [RRB NTPC 2021 CBT-1]

Answer: C) MS Excel

Solution: MS Excel is application software designed for spreadsheet tasks, while Windows, Linux, and device drivers manage hardware resources.

Exam Tip: Remember - if end-user uses it for specific tasks, it’s application software

PYQ 2. The software permanently stored in hardware chips of railway ticket printers is called: A) Firmware B) Shareware C) Freeware D) Adware [RRB Group D 2022]

Answer: A) Firmware

Solution: Railway printers have embedded software in their chips that controls printing operations - this is firmware.

Exam Tip: Hardware-embedded software = Firmware (think “firm” = fixed)

PYQ 3. Which converts entire program at once before execution? A) Interpreter B) Assembler C) Compiler D) Linker [RRB ALP 2018]

Answer: C) Compiler

Solution: Compiler translates complete high-level program to machine code before execution, while interpreter works line-by-line.

Exam Tip: Compiler = Complete; Interpreter = Incremental

PYQ 4. Open source software used by Indian Railways for database management is: A) Oracle B) MySQL C) MS SQL D) DB2 [RRB JE 2019]

Answer: B) MySQL

Solution: MySQL is open-source RDBMS used by railways for passenger reservation systems, while others are proprietary.

Exam Tip: MySQL is free and open-source (think “My” = free for me)

PYQ 5. The software that protects railway computer systems from viruses is: A) Compiler B) Antivirus C) Debugger D) Emulator [RPF SI 2019]

Answer: B) Antivirus

Solution: Antivirus software detects and removes malicious programs from computer systems.

Exam Tip: Anti-virus = Against viruses (literal meaning helps remember)

Speed Tricks & Shortcuts

Common Mistakes to Avoid

Quick Revision Flashcards

Topic Connections

How Software connects to other RRB exam topics:

• Direct Link: Computer Hardware - Software runs on hardware; no software works without compatible hardware
• Combined Questions: Software + Networking (e.g., browser software for internet), Software + Security (antivirus protection)
• Foundation For: Understanding railway computerization, digital ticketing systems, GPS tracking technology