SSC CGL Computer – Memory, Storage, Backup Devices & Ports – Level 3 · Challenge
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Every step is × 1,024: 1,024 × 1,024 × 1,024 = 1,07,37,41,824 bytes (2³⁰).
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SSC CGL Computer – Memory, Storage, Backup Devices & Ports – 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.
How many kilobytes are there in 3 GB?
Correct Answer: A [31,45,728]
Explanation:
3 × 1,024 × 1,024 = 31,45,728 KB.
2.
Statement-basedWhich is/are correct?
I. ROM is a primary memory.
II. All primary memory is volatile.
I. ROM is a primary memory.
II. All primary memory is volatile.
Correct Answer: B [Only I]
Explanation:
ROM is primary memory but non-volatile, so II is false.
3.
Match the followingMatch the port with what it connects:
P. RJ-11 Q. HDMI R. SATA S. PS/2 (purple)
1. Internal hard disk 2. Telephone line 3. TV or monitor with sound 4. Keyboard
P. RJ-11 Q. HDMI R. SATA S. PS/2 (purple)
1. Internal hard disk 2. Telephone line 3. TV or monitor with sound 4. Keyboard
Correct Answer: A [P-2, Q-3, R-1, S-4]
Explanation:
RJ-11 phone; HDMI video+audio; SATA drives; purple PS/2 keyboard.
4.
Odd one outOdd one out (by volatility):
Correct Answer: C [ROM]
Explanation:
ROM is non-volatile; SRAM, DRAM and cache (SRAM) are volatile.
5.
Assertion–Reason
A: Keeping two mirrored disks (RAID 1) protects against accidental deletion of a file.
R: In RAID 1 both disks always hold the same data.
A: Keeping two mirrored disks (RAID 1) protects against accidental deletion of a file.
R: In RAID 1 both disks always hold the same data.
Correct Answer: D [A is false but R is true]
Explanation:
A is false – a deletion is mirrored to both disks at once.
6.
The maximum signalling rate of USB 1.1 (Full Speed) is 12 Mbit/s. In megabytes per second (decimal) this is:
Correct Answer: C [1.5 MB/s]
Explanation:
Divide bits by 8: 12 ÷ 8 = 1.5 MB/s.
7.
Statement-basedWhich pair is NOT correctly matched?
Correct Answer: A [Blu-ray – infrared laser]
Explanation:
Blu-ray uses a blue-violet (405 nm) laser; infrared is used for CDs.
8.
Spot My Mistake'Since 1 GB = 1,024 MB, 1 GB = 1,024 × 1,000 bytes.' The correct number of bytes in 1 GB is:
Correct Answer: D [1,07,37,41,824 bytes]
Explanation:
Every step is × 1,024: 1,024 × 1,024 × 1,024 = 1,07,37,41,824 bytes (2³⁰).
➤ 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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