SSC CGL Computer – Computer Organisation – CPU & Input/Output Devices – Level 3 · Challenge
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A scanner only makes an image; OCR converts the image into text.
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SSC CGL Computer – Computer Organisation – CPU & Input/Output Devices – 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.
Match the followingMatch the device with its typical use:
P. OMR Q. MICR R. OCR S. Biometric sensor
1. Turning a scanned book page into text 2. Checking bubbles on an answer sheet 3. Fingerprint attendance 4. Cheque processing
P. OMR Q. MICR R. OCR S. Biometric sensor
1. Turning a scanned book page into text 2. Checking bubbles on an answer sheet 3. Fingerprint attendance 4. Cheque processing
Correct Answer: B [P-2, Q-4, R-1, S-3]
Explanation:
OMR – marks; MICR – cheques; OCR – text; biometric – fingerprint.
2.
Statement-basedWhich is/are correct?
I. A daisy-wheel printer gives letter-quality text but cannot print graphics.
II. A line printer's speed is measured in lines per minute.
I. A daisy-wheel printer gives letter-quality text but cannot print graphics.
II. A line printer's speed is measured in lines per minute.
Correct Answer: D [Both I and II]
Explanation:
Both correct: daisy wheel – fixed characters only; line printer – LPM.
3.
Assertion–Reason
A: The Control Unit is responsible for adding two numbers.
R: The Control Unit sends control signals to other parts of the computer.
A: The Control Unit is responsible for adding two numbers.
R: The Control Unit sends control signals to other parts of the computer.
Correct Answer: B [A is false but R is true]
Explanation:
Answer: A is false but R is true. A is false – the ALU adds.
4.
Odd one outOdd one out (by printer type):
Correct Answer: C [Laser]
Explanation:
Laser is non-impact; the other three are impact printers.
5.
After the fetch step, which register holds the instruction itself while the Control Unit decodes it?
Correct Answer: A [Instruction Register]
Explanation:
The fetched instruction sits in the IR for decoding; the PC already holds the NEXT address; the MAR holds an address, not an instruction.
6.
An 18-line address bus with one byte per address can reach:
Correct Answer: D [256 KB]
Explanation:
2¹⁸ = 2⁸ × 2¹⁰ = 256 KB (not 2 × 18).
7.
Statement-basedWhich statement about monitors is NOT correct?
Correct Answer: C [An LCD panel produces its own light without any backlight]
Explanation:
LCD needs a backlight; OLED is the self-emitting type.
8.
Spot My Mistake'A scanner is enough to turn a printed page into editable text in a word processor.' What is missing?
Correct Answer: B [OCR software to recognise the characters]
Explanation:
A scanner only makes an image; OCR converts the image into text.
➤ 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
Get the book – ₹149 More quizzes
› SSC CGL Computer – Mock Test M3 – Computer Knowledge Module
› SSC CGL Computer – Mock Test M2 – Computer Knowledge Module
› SSC CGL Computer – Mock Test M1 – Computer Knowledge Module
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