कम्प्युटर आधारभूत ज्ञान र हार्डवेयर – Computer Fundamentals & Hardware MCQ
कम्प्युटर आधारभूत ज्ञान र हार्डवेयर – कम्प्युटर र IT
Computer Fundamentals & Hardware · Computer & IT (Technical) · ५७४ प्रश्न
५७४ प्रश्न उपलब्ध। मोड छान्नुहोस्:
कम्प्युटर आधारभूत ज्ञान र हार्डवेयर: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ३ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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MTBF, a figure often used to express hard disk reliability, stands for:
सही उत्तर: ग) Mean Time Between Failures
MTBF is the average operating time expected between failures of a device, usually quoted in hours.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which type of NAND flash cell stores only one bit per cell and offers the highest endurance?
सही उत्तर: क) SLC
Single-Level Cell flash stores 1 bit per cell; MLC, TLC and QLC store 2, 3 and 4 bits, trading endurance for density.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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NOR flash, unlike NAND flash, is often used to hold firmware because it:
सही उत्तर: ख) Allows fast random byte reads, so code can execute directly from it
NOR flash is byte-addressable for reading, which supports execute-in-place; NAND is denser and is used for bulk storage.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Memory that is searched by its contents rather than by an address is called:
सही उत्तर: घ) Associative (content-addressable) memory
Content-addressable memory compares the search key with all stored words at once and reports matches.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a direct-mapped cache, a miss that happens because two frequently used blocks map to the same line and keep evicting each other is a:
सही उत्तर: क) Conflict miss
Conflict misses come from the restricted placement of a mapping scheme; more associativity reduces them.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A direct-mapped cache has 128 lines of 16 bytes each, and the machine uses 32-bit byte addresses. How many bits form the tag?
सही उत्तर: ग) 21
Offset = log2(16) = 4 bits, index = log2(128) = 7 bits, so tag = 32 - 7 - 4 = 21 bits.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The 32-bit value 12345678H is stored starting at address 100 on a big-endian machine. Which byte is at address 100?
सही उत्तर: ग) 12H
Big-endian stores the most significant byte at the lowest address, so address 100 holds 12H.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the 8085, pins AD0-AD7 carry both the lower address byte and data. The signal used to latch the address byte is:
सही उत्तर: क) ALE (Address Latch Enable)
ALE goes high at the start of a machine cycle so an external latch can capture A0-A7 before the pins switch to data.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In 8086 real mode, with CS = 1000H and IP = 0020H, the physical address of the next instruction is:
सही उत्तर: ख) 10020H
Physical address = segment x 16 + offset = 10000H + 0020H = 10020H.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Bus Interface Unit of the Intel 8086 prefetches instructions into a queue of:
सही उत्तर: घ) 6 bytes
The 8086 has a 6-byte instruction queue (the 8088 has 4 bytes), letting fetch overlap with execution.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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