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1.
Consider the following statements about the keyboard:
I. Caps Lock, Num Lock and Scroll Lock are toggle keys.
II. Shift, Ctrl and Alt are function keys.
III. Backspace deletes the character to the left of the cursor.
Which of the statements given above is/are correct?
I. Caps Lock, Num Lock and Scroll Lock are toggle keys.
II. Shift, Ctrl and Alt are function keys.
III. Backspace deletes the character to the left of the cursor.
Which of the statements given above is/are correct?
Correct Answer: D [Only I and III]
Explanation:
I true; II false – they are modifier keys (F1–F12 are function keys); III true (Delete removes to the right).
2.
A network link runs at 100 Mbps (decimal prefixes). At most how many million bytes can it move per second?
Correct Answer: A [12.5]
Explanation:
100 million bits ÷ 8 = 12.5 million bytes per second.
3.
Consider the following statements about the ROM family:
I. PROM can be written only once.
II. EEPROM must be removed from the circuit and exposed to UV light to be erased.
III. Flash memory is erased electrically, block by block.
Which of the statements given above is/are correct?
I. PROM can be written only once.
II. EEPROM must be removed from the circuit and exposed to UV light to be erased.
III. Flash memory is erased electrically, block by block.
Which of the statements given above is/are correct?
Correct Answer: D [Only I and III]
Explanation:
I true; II false – that describes EPROM; EEPROM is erased electrically in the circuit; III true.
4.
How many of the following are non-volatile? ROM, RAM, Cache, SSD, EEPROM, DRAM
Correct Answer: D [3]
Explanation:
Non-volatile: ROM, SSD, EEPROM = 3.
5.
Match the register with what it holds:
List I: (a) Program Counter; (b) Instruction Register; (c) Memory Address Register; (d) Accumulator
List II: (1) address of the next instruction; (2) result of the ALU; (3) current instruction; (4) address of the memory location
List I: (a) Program Counter; (b) Instruction Register; (c) Memory Address Register; (d) Accumulator
List II: (1) address of the next instruction; (2) result of the ALU; (3) current instruction; (4) address of the memory location
Correct Answer: E [a-1, b-3, c-4, d-2]
Explanation:
PC – next address; IR – current instruction; MAR – memory address; ACC – ALU result.
6.
A screen of 1024 × 768 pixels uses 3 bytes per pixel. How much memory does one full screen image need (take 1 MB = 1,024 × 1,024 bytes)?
Correct Answer: B [2.25 MB]
Explanation:
1024 × 768 × 3 = 23,59,296 bytes ÷ 2²⁰ = 2.25 MB.
7.
Consider the following statements about printers:
I. A laser printer is a non-impact printer.
II. A dot-matrix printer can print carbon copies because it strikes the paper.
III. Thermal printers use an inked ribbon struck by hammers.
Which of the statements given above is/are correct?
I. A laser printer is a non-impact printer.
II. A dot-matrix printer can print carbon copies because it strikes the paper.
III. Thermal printers use an inked ribbon struck by hammers.
Which of the statements given above is/are correct?
Correct Answer: C [Only I and II]
Explanation:
I and II true; III false – thermal printers use heat on special paper.
8.
Which pair is NOT correctly matched?
Correct Answer: B [RJ-45 – telephone line]
Explanation:
RJ-45 is the Ethernet (LAN) connector; RJ-11 is for telephone lines.
9.
Over 1,250 memory accesses the cache hit ratio was 0.96. How many misses occurred?
Correct Answer: D [50]
Explanation:
Hits = 0.96 × 1,250 = 1,200; misses = 50.
10.
What is the minimum width of the address bus needed to address 256 MB of byte-addressable memory?
Correct Answer: A [28]
Explanation:
256 MB = 2⁸ × 2²⁰ = 2²⁸ → 28 bits.
11.
How many of the following are input devices? MICR reader, OMR reader, Plotter, Light pen, Projector, Barcode reader
Correct Answer: C [4]
Explanation:
Inputs: MICR, OMR, light pen, barcode reader = 4; plotter and projector are output.
12.
Consider the following statements about storage:
I. An SSD has no moving parts.
II. A Blu-ray disc is read with a blue-violet laser.
III. A hard disk gives only sequential access.
Which of the statements given above is/are correct?
I. An SSD has no moving parts.
II. A Blu-ray disc is read with a blue-violet laser.
III. A hard disk gives only sequential access.
Which of the statements given above is/are correct?
Correct Answer: C [Only I and II]
Explanation:
I and II true; III false – disks give direct access; tape is sequential.
13.
Odd one out:
Correct Answer: E [SRAM]
Explanation:
SRAM is volatile RAM; the others keep data without power.
14.
Which shows the units in increasing order of size?
Correct Answer: C [MB < GB < TB < PB < EB]
Explanation:
MB < GB < TB < PB < EB – each step × 1,024.
15.
In a computer, SMPS stands for:
Correct Answer: A [Switched-Mode Power Supply]
Explanation:
SMPS = Switched-Mode Power Supply – converts mains AC to low-voltage DC.
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