SSC CGL Computer – Computer Fundamentals & Generations (optional) – Exam-Level Drill

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SSC CGL Computer – Computer Fundamentals & Generations (optional) – Exam-Level Drill – 10 questions, subject: Computer Knowledge. Every question has the correct answer with a one-line explanation; tap "Show Answer". Free practice for TNPSC, UPSC, SSC, Bank and RRB exams – Shanmugam IAS Academy, Coimbatore.

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1.  
A processor is rated at 400 MIPS (million instructions per second). How long does one instruction take?

Correct Answer: D [2.5 ns]

Explanation:

1 s ÷ (400 × 10⁶) = 2.5 × 10⁻⁹ s = 2.5 ns.

2.  
A computer runs at 5 teraFLOPS. How many floating-point operations does it perform in one microsecond?

Correct Answer: B [5 × 10⁶]

Explanation:

5 × 10¹² per s × 10⁻⁶ s = 5 × 10⁶.

3.  
3.5 microseconds is equal to:

Correct Answer: D [3,500 ns]

Explanation:

One step down (µs → ns): × 1,000 → 3,500 ns.

4.  
Arrange in orderArrange the scales of integration from the fewest to the most components per chip:

Correct Answer: A [SSI, MSI, LSI, VLSI]

Explanation:

Small → Medium → Large → Very large scale integration (then ULSI).

5.  
Statement-basedWhich of the pairs are correctly matched?
1. Vacuum tube – first generation
2. Transistor – third generation
3. Microprocessor – fourth generation

Correct Answer: C [1 and 3 only]

Explanation:

Pair 2 is wrong: transistor is the second generation.

6.  
In the IPOS cycle, arranging a list of 500 names in alphabetical order is part of which stage?

Correct Answer: D [Process]

Explanation:

Sorting is work done by the CPU on data already entered → Process.

7.  
Computer A takes 5 ns per instruction and computer B takes 2 ns per instruction. How many times faster is B?

Correct Answer: B [2.5 times]

Explanation:

Answer: 2.5 times. Speed ∝ 1/time: 5 ÷ 2 = 2.5.

8.  
Statement-basedWhich statement about ENIAC is NOT correct?

Correct Answer: A [It was a microprocessor-based personal computer]

Explanation:

ENIAC was a room-sized vacuum-tube machine (generation 1); microprocessors came in 1971.

9.  
Match the followingMatch the computer type with its best use:
P. Supercomputer Q. Mainframe R. Microcomputer S. Embedded computer
1. One person's daily office work 2. Climate simulation 3. Controlling a microwave oven 4. A bank's transactions from thousands of branches

Correct Answer: C [P-2, Q-4, R-1, S-3]

Explanation:

Super – heavy calculation; mainframe – many users; micro – one user; embedded – inside a device.

10.  
Arrange in orderArrange the time units from largest to smallest:

Correct Answer: A [ms > µs > ns > ps]

Explanation:

milli 10⁻³ > micro 10⁻⁶ > nano 10⁻⁹ > pico 10⁻¹².

➤ Full notes, shortcuts and every answer explained – SSC CGL 2026 Computer Knowledge book (₹149): www.shanmugamiasacademy.in/study-materials/ssc-cgl-computer-knowledge

📘 SSC CGL 2026 – Computer Knowledge (Tier II Paper I – Section III)
Here you get the answer with a one-line explanation. 672 original questions with answer key and explanations · notes, figures, shortcut keys and memory aids · practice sets + 3 Computer Knowledge mock tests
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