त्रिवि IT प्रवेश BIT र BCA प्रवेश तयारी
त्रिवि IT प्रवेश – BIT र BCA प्रवेश
TU BIT & BCA Entrance · TU IT Entrance (B.Sc. CSIT, BIT, BCA)
२,६०७ प्रश्न उपलब्ध। मोड छान्नुहोस्:
IT प्रवेश: 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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If a CPU has a 16-bit address bus, how many memory locations can it address?
सही उत्तर: ग) 65,536
An n-bit address bus can address 2^n locations, so 2^16 = 65,536 (64 K) locations. 1,048,576 would require a 20-bit address bus.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A multiplexer is a circuit that:
सही उत्तर: ग) Selects one of many inputs and sends it to a single output
A multiplexer (data selector) uses select lines to route one of many inputs to one output. Sending one input to many outputs is the job of a demultiplexer.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a half adder, the carry output is produced by which gate?
सही उत्तर: ग) AND
A half adder produces Sum = A XOR B and Carry = A AND B. A carry occurs only when both input bits are 1.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which gate gives output 0 only when all its inputs are 1?
सही उत्तर: क) NAND
NAND is the complement of AND, so it outputs 0 only when every input is 1. NOR outputs 1 only when all inputs are 0.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many rows are there in the truth table of a function with 3 input variables?
सही उत्तर: क) 8
A truth table has 2^n rows for n inputs, so 3 inputs give 2^3 = 8 rows. 6 would be 3 x 2, which is a common mistake.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In Boolean algebra, A·A' equals:
सही उत्तर: क) 0
A variable ANDed with its own complement is always 0, because one of them is always 0 (complement law). Similarly, A + A' = 1.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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An XOR gate gives output 1 when:
सही उत्तर: क) Its two inputs are different
Exclusive-OR outputs 1 only when the inputs differ (01 or 10). When both inputs are equal, the output is 0; the opposite behaviour belongs to XNOR.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many bits are used in the standard ASCII code?
सही उत्तर: ग) 7
Standard ASCII uses 7 bits and represents 128 characters. Extended ASCII uses 8 bits (256 characters), and Unicode uses more.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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What is the minimum number of bits needed to represent 100 different values?
सही उत्तर: ग) 7
6 bits give only 2^6 = 64 values, while 7 bits give 2^7 = 128, which is enough for 100. 8 bits would work but is not the minimum.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Gray code equivalent of binary 0110 is:
सही उत्तर: ग) 0101
The first Gray bit equals the first binary bit; each next Gray bit is the XOR of adjacent binary bits: 0, 0 XOR 1 = 1, 1 XOR 1 = 0, 1 XOR 0 = 1, giving 0101. In Gray code consecutive numbers differ by only one bit.
💬 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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