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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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)
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In a Karnaugh map, 'don't care' conditions (marked X) may be:
सही उत्तर: ग) treated as either 0 or 1, whichever gives a simpler grouping
Don't-care entries can be included in groups as 1 or left out as 0 to obtain the simplest expression.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following Boolean expressions is in Sum-of-Products (SOP) form?
सही उत्तर: क) AB + A'C
SOP is an OR (sum) of AND (product) terms, such as AB + A'C.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The 8-bit 2's complement number 11111011 represents the decimal value:
सही उत्तर: क) -5
The leading 1 shows it is negative; 2's complement of 11111011 is 00000101 = 5, so the value is -5.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The main property of Gray code is that:
सही उत्तर: क) only one bit changes between successive values
Gray code is a unit-distance (reflected) code: consecutive numbers differ in exactly one bit, which reduces errors in encoders.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which of the following 4-bit groups is invalid in 8421 BCD code?
सही उत्तर: ख) 1100
BCD uses only 0000 to 1001 (0-9); the groups 1010 to 1111 are invalid.
💬 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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