कम्प्युटर / सूचना प्रविधि कम्प्युटर अधिकृत (सातौँ तह) – प्राविधिक पत्र
कम्प्युटर / सूचना प्रविधि – कम्प्युटर अधिकृत (सातौँ तह)
Computer Officer – 7th Level · 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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The three possible output states of a tri-state buffer are:
सही उत्तर: ग) 0, 1 and high impedance
A tri-state buffer can drive 0 or 1 or be disconnected (high-Z), which allows many devices to share a bus.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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When more than one input of a priority encoder is active at the same time, its output gives:
सही उत्तर: ग) the code of the highest-priority active input
A priority encoder resolves multiple active inputs by encoding only the one with highest priority.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many 2-to-1 multiplexers are needed to build an 8-to-1 multiplexer?
सही उत्तर: घ) 7
A tree of 2:1 MUXes needs 4 + 2 + 1 = 7 units to reduce 8 inputs to 1.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A digital magnitude comparator is used to determine:
सही उत्तर: ग) whether one binary number is greater than, equal to or less than another
A magnitude comparator compares two numbers A and B and outputs A > B, A = B or A < B.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A 4-bit binary ripple up-counter starts at 0000. What does it read after 20 clock pulses?
सही उत्तर: क) 0100
A 4-bit counter counts modulo 16, so 20 mod 16 = 4 = 0100.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A Johnson (twisted-ring) counter made with 4 flip-flops has how many distinct states?
सही उत्तर: ग) 8
A Johnson counter with n flip-flops cycles through 2n states, so 4 flip-flops give 8 states.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The main difference between a latch and a flip-flop is that:
सही उत्तर: क) a latch is level-sensitive while a flip-flop is edge-triggered
A latch responds whenever its enable is active (level), while a flip-flop changes only at a clock edge.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a D flip-flop, at the active clock edge the output Q:
सही उत्तर: ख) takes the value present at the D input
The D (data/delay) flip-flop copies its D input to Q on the clock edge and holds it until the next edge.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following is a sequential circuit?
सही उत्तर: घ) Counter
A counter is built from flip-flops and stores state; the others are combinational circuits.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which logic gate is most commonly used to build parity generators and parity checkers?
सही उत्तर: ग) XOR
The XOR of a set of bits is 1 when the number of 1s is odd, which is exactly the parity function.
💬 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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