कम्प्युटर / सूचना प्रविधि कम्प्युटर अपरेटर (पाँचौँ तह) र सहायक – प्राविधिक पत्र
कम्प्युटर / सूचना प्रविधि – कम्प्युटर अपरेटर (पाँचौँ तह) र सहायक
Computer Operator & Assistant · Computer & IT Posts
२,५७७ प्रश्न उपलब्ध। मोड छान्नुहोस्:
प्राविधिक पत्र: प्रश्न र उत्तर
सही लागेको विकल्पमा थिच्नुहोस्। सही भए हरियो, गलत भए रातो देखिन्छ; ५ सेकेन्डपछि सही उत्तर र व्याख्या देखिन्छ।
सही: ० / ०
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How many 1K x 4 memory chips are needed to build a 4K x 8 memory?
सही उत्तर: क) 8
Total bits needed / bits per chip = (4K x 8) / (1K x 4) = 8 chips (4 rows of 2 chips).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A memory chip has 12 address lines and 16 data lines. Its capacity is:
सही उत्तर: घ) 8 KB
2^12 = 4096 locations x 16 bits = 65536 bits = 8192 bytes = 8 KB.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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ECC (Error-Correcting Code) memory, often used in servers, can:
सही उत्तर: क) detect and correct single-bit memory errors
ECC memory stores extra check bits, typically allowing single-bit errors to be corrected and double-bit errors detected.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a write-back cache, the 'dirty bit' of a cache line indicates that:
सही उत्तर: ग) the line has been modified and must be written to main memory before it is replaced
Write-back updates only the cache; the dirty bit marks lines whose changes must be copied back to memory on eviction.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a set-associative cache, a block of main memory can be placed in:
सही उत्तर: ग) any line within one particular set
Set-associative mapping maps a block to one set, but it may occupy any of the lines (ways) of that set.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The contents of a mask ROM are written:
सही उत्तर: ख) during manufacturing, using a photomask
Mask ROM data is built into the chip during fabrication, so it is economical only for large production runs.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A PROM (Programmable ROM) chip can be programmed by the user:
सही उत्तर: क) only once
A PROM is written once by blowing internal fuses; it cannot be erased afterwards.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An SRAM cell stores one bit using:
सही उत्तर: घ) a flip-flop made of transistors (typically six)
SRAM uses a bistable latch, so it holds data as long as power is on without needing refresh.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A 4-stage pipeline has each stage taking 10 ns. With no stalls, the time to complete 10 instructions is:
सही उत्तर: ख) 130 ns
Time = (k + n - 1) x t = (4 + 10 - 1) x 10 ns = 130 ns.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In DMA, the method in which the DMA controller takes the system bus for one cycle at a time, in between CPU cycles, is called:
सही उत्तर: ख) cycle stealing
In cycle stealing the DMA controller transfers one word per stolen bus cycle, letting the CPU continue in between.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
यी अभ्यास प्रश्न हुन्, आधिकारिक प्रश्न होइनन्। पाठ्यक्रम, विज्ञापन र नतिजाका लागि सम्बन्धित निकायको आधिकारिक वेबसाइट हेर्नुहोस्। उत्तरमा गल्ती भेटे प्रश्नमुनिको "टिप्पणी / गल्ती रिपोर्ट" मा लेख्नुहोस्।
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