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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In an up/down counter, the direction of counting is selected by:
सही उत्तर: ख) a mode (UP/DOWN) control input
A control input changes the internal connections so the counter counts either upward or downward.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a synchronous counter:
सही उत्तर: ग) all flip-flops are clocked at the same time by a common clock
Using a common clock removes the cumulative ripple delay of asynchronous counters.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A ring counter built with 4 flip-flops has how many distinct states?
सही उत्तर: ग) 4
A ring counter circulates a single 1 through the flip-flops, so n flip-flops give n states.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The setup time of a flip-flop is the minimum time for which:
सही उत्तर: घ) the data input must be stable before the active clock edge
Setup time is measured before the clock edge; the time the data must stay stable after the edge is the hold time.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The characteristic equation of a T (toggle) flip-flop is:
सही उत्तर: ग) Q(next) = T XOR Q
With T = 0 the output holds and with T = 1 it complements, which is Q(next) = T XOR Q.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The characteristic equation of a JK flip-flop is:
सही उत्तर: घ) Q(next) = JQ' + K'Q
Q(next) = JQ' + K'Q gives hold for J=K=0, reset for K=1, set for J=1 and toggle for J=K=1.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A short unwanted spike at the output of a combinational circuit, caused by unequal propagation delays along different paths, is called a:
सही उत्तर: ख) hazard (glitch)
Unequal path delays can momentarily produce a wrong output, known as a static or dynamic hazard (glitch).
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a common-cathode seven-segment display, a segment lights up when its input is driven:
सही उत्तर: घ) HIGH (logic 1)
All cathodes are tied to ground, so a segment's LED conducts when its anode input is driven high.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In a Programmable Array Logic (PAL) device:
सही उत्तर: ख) the AND array is programmable and the OR array is fixed
A PAL has a programmable AND array feeding a fixed OR array, while a PLA has both arrays programmable.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A decoder that has an enable input can also be used as a:
सही उत्तर: ख) demultiplexer
If data is applied to the enable input and the select code to the address inputs, the data appears on the selected output, which is demultiplexing.
💬 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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