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1.  
3 GB is equal to how many MB?

Correct Answer: E [3,072]

Explanation:

One step down: 3 × 1,024 = 3,072 MB.

2.  
8,192 KB is equal to:

Correct Answer: B [8 MB]

Explanation:

One step up: 8,192 ÷ 1,024 = 8 MB.

3.  
A memory chip is labelled 64 Mb (megabits). Its capacity in megabytes is:

Correct Answer: A [8 MB]

Explanation:

Small b = bits; 64 ÷ 8 = 8 MB.

4.  
Which memory is erased by exposing it to ultraviolet light?

Correct Answer: C [EPROM]

Explanation:

EPROM has a quartz window; UV light erases it.

5.  
Which of the following is NOT secondary storage?

Correct Answer: D [Cache]

Explanation:

Cache is primary memory inside/near the CPU.

6.  
How many memory locations can a 16-bit address bus reach?

Correct Answer: E [65,536]

Explanation:

2¹⁶ = 65,536.

7.  
A processor's clock runs at 4 GHz. The time for one clock cycle is:

Correct Answer: A [0.25 ns]

Explanation:

1 ÷ (4 × 10⁹) s = 0.25 × 10⁻⁹ s = 0.25 ns.

8.  
Match the memory with how it is erased:
List I: (a) PROM; (b) EPROM; (c) EEPROM; (d) Flash
List II: (1) electrically, byte by byte; (2) cannot be erased; (3) ultraviolet light; (4) electrically, block by block

Correct Answer: B [a-2, b-3, c-1, d-4]

Explanation:

PROM – no erase; EPROM – UV; EEPROM – electrical bytes; flash – electrical blocks.

9.  
On a hard-disk platter, data is recorded on concentric circles called:

Correct Answer: D [Tracks]

Explanation:

Concentric circles = tracks; each track is divided into sectors.

10.  
OMR is most suitable for:

Correct Answer: C [reading marks on exam answer sheets]

Explanation:

OMR detects pen/pencil marks in fixed bubbles.

11.  
A CPU found the needed data in the cache 720 times and missed it 80 times. The hit ratio is:

Correct Answer: B [90%]

Explanation:

720 ÷ 800 = 0.9 = 90%.

12.  
Which port carries analog video only?

Correct Answer: C [VGA]

Explanation:

VGA is the old analog video port; HDMI and DisplayPort are digital.

13.  
The usual capacity of a single-layer Blu-ray disc is:

Correct Answer: A [25 GB]

Explanation:

Single-layer Blu-ray 25 GB; dual-layer 50 GB; DVD 4.7 GB.

14.  
Which port lets a device be connected or removed while the computer is running (hot-plugging) and is used for pen drives?

Correct Answer: E [USB]

Explanation:

USB is hot-pluggable.

15.  
Consider the following statements:
I. DRAM must be refreshed regularly.
II. SRAM is slower than DRAM.
III. Main memory of a PC is usually DRAM.
Which of the statements given above is/are correct?

Correct Answer: D [Only I and III]

Explanation:

I true; II false – SRAM is faster (used for cache); III true.

16.  
1 TB is equal to how many MB?

Correct Answer: D [10,48,576]

Explanation:

Two steps down: 1,024 × 1,024 = 10,48,576 MB.

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