SSC CGL Computer – Computer Fundamentals & Generations (optional) – Level 3 · Challenge

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SSC CGL Computer – Computer Fundamentals & Generations (optional) – Level 3 · Challenge – 8 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.  
Statement-basedWhich is/are correct?
I. The transistor was invented at Bell Laboratories in 1947.
II. The Intel 4004 (1971) was the first commercial single-chip microprocessor.

Correct Answer: C [Both I and II]

Explanation:

Both are standard milestones: transistor 1947 (Bell Labs); Intel 4004 1971.

2.  
Match the followingMatch the person with the contribution:
P. John Napier Q. Blaise Pascal R. Herman Hollerith S. Alan Turing
1. Mechanical adding machine 2. Theoretical model of computation 3. Numbered rods for multiplication 4. Punched-card census tabulator

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

Explanation:

Napier – bones (rods); Pascal – Pascaline; Hollerith – census tabulator; Turing – Turing machine.

3.  
Arrange in orderArrange from earliest to latest:
1. Intel 4004
2. Transistor
3. IBM PC
4. Integrated circuit

Correct Answer: D [2, 4, 1, 3]

Explanation:

Transistor (1947) → Integrated circuit (1958) → Intel 4004 (1971) → IBM PC (1981) – the anchor years 47 · 58 · 71 · 81.

4.  
Odd one out

Correct Answer: C [Hybrid computer]

Explanation:

Super, mainframe and mini are classes by SIZE; hybrid is a class by DATA handled.

5.  
Assertion–Reason
A: A needle-type speedometer is an analog device.
R: It shows a continuously varying quantity on a scale.

Correct Answer: A [Both A and R are true and R explains A]

Explanation:

Analog = continuous quantity shown on a scale; R gives the reason.

6.  
Assertion–Reason
A: First-generation computers were built with integrated circuits.
R: An integrated circuit places many electronic components on one chip.

Correct Answer: C [A is false but R is true]

Explanation:

A is false – generation 1 used vacuum tubes (ICs came in generation 3).

7.  
How many nanoseconds make one millisecond?

Correct Answer: B [10⁶]

Explanation:

Two steps down the ladder ms → µs → ns: 1,000 × 1,000 = 10⁶.

8.  
Spot My MistakeA student writes, 'The Intel 4004 (1971) put a whole CPU on one chip, so it marks the third generation.' What is the correct version?

Correct Answer: A [A single-chip CPU is a microprocessor – it marks the fourth generation]

Explanation:

ICs (many components on a chip) mark generation 3; a whole CPU on one chip – the microprocessor, Intel 4004 – marks generation 4.

➤ 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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