कम्प्युटर / सूचना प्रविधि कम्प्युटर अधिकृत (सातौँ तह) – प्राविधिक पत्र
कम्प्युटर / सूचना प्रविधि – कम्प्युटर अधिकृत (सातौँ तह)
Computer Officer – 7th Level · Computer & IT Posts
१,५०२ 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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The 2-input logic gate whose output is 0 only when all its inputs are 1 is the:
सही उत्तर: ख) NAND gate
NAND is the complement of AND, so it gives 0 only when every input is 1 and 1 otherwise.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In IEEE 754 single-precision format, how many bits are used for the fraction (mantissa) field?
सही उत्तर: ख) 23
Single precision has 1 sign bit, 8 exponent bits and 23 fraction bits (with an implied leading 1).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many bits in total does an IEEE 754 binary64 (double) value use?
सही उत्तर: ग) 64
IEEE 754 double precision uses 64 bits: 1 sign bit, 11 exponent bits and 52 fraction bits.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In the 2-out-of-5 code, each decimal digit is represented by 5 bits of which exactly:
सही उत्तर: घ) two bits are 1
Every valid 2-out-of-5 code word has exactly two 1s, so any single-bit error makes an invalid word that can be detected.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The UTF-16 encoding stores each Unicode character using:
सही उत्तर: घ) 2 or 4 bytes
UTF-16 uses one 16-bit unit for most characters and a pair of 16-bit units (surrogate pair) for others.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A simple checksum detects transmission errors by:
सही उत्तर: ख) adding the data words and sending the sum, which the receiver recomputes and compares
The receiver recalculates the sum of the received words; a mismatch with the sent checksum indicates an error.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Gray code for decimal 5 (binary 0101) is:
सही उत्तर: घ) 0111
Keep the first bit (0), then XOR adjacent bits: 0 XOR 1 = 1, 1 XOR 0 = 1, 0 XOR 1 = 1, giving 0111.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Hamming distance between the binary words 10110 and 11011 is:
सही उत्तर: घ) 3
Comparing bit by bit, the words differ in the 2nd, 3rd and 5th positions, so the distance is 3.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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To be able to correct every single-bit error, a code must have a minimum Hamming distance of at least:
सही उत्तर: ख) 3
To correct t errors the minimum distance must be 2t + 1, so single-error correction needs distance 3.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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To protect 4 data bits with a single-error-correcting Hamming code, how many parity (check) bits are needed?
सही उत्तर: क) 3
The check bits p must satisfy 2^p >= d + p + 1; for d = 4, p = 3 works (8 >= 8), giving the (7,4) Hamming code.
💬 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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