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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In the 8085, pins AD0-AD7 carry both the lower address byte and data. The signal used to latch the address byte is:
सही उत्तर: क) ALE (Address Latch Enable)
ALE goes high at the start of a machine cycle so an external latch can capture A0-A7 before the pins switch to data.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In 8086 real mode, with CS = 1000H and IP = 0020H, the physical address of the next instruction is:
सही उत्तर: ख) 10020H
Physical address = segment x 16 + offset = 10000H + 0020H = 10020H.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The Bus Interface Unit of the Intel 8086 prefetches instructions into a queue of:
सही उत्तर: घ) 6 bytes
The 8086 has a 6-byte instruction queue (the 8088 has 4 bytes), letting fetch overlap with execution.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The six general-purpose 8-bit registers of the Intel 8085 are:
सही उत्तर: घ) B, C, D, E, H and L
The 8085 has B, C, D, E, H and L (usable as pairs BC, DE, HL) besides the accumulator A.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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How many flag bits does the Intel 8085 actually use in its flag register?
सही उत्तर: ख) 5
The 8085 has five flags: Sign, Zero, Auxiliary Carry, Parity and Carry; the other three bits are unused.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In isolated (I/O-mapped) I/O, as used by the 8085 and x86 processors, the CPU accesses device ports using:
सही उत्तर: ग) Special IN and OUT instructions
Isolated I/O gives ports a separate address space reached only through dedicated IN/OUT instructions, unlike memory-mapped I/O.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In asynchronous data transfer, the method in which source and destination exchange control signals such as 'data valid' and 'data accepted' is called:
सही उत्तर: क) Handshaking
Handshaking uses a pair of control signals so each side confirms the other's action, making the transfer reliable without a common clock.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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In daisy-chain priority interrupt handling, the priority of a device is decided by:
सही उत्तर: ख) Its position in the chain, the device nearest the CPU having the highest priority
The acknowledge signal passes from device to device; the first requesting device it reaches captures it, so position fixes priority.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The table that holds the starting addresses of the interrupt service routines is called the:
सही उत्तर: घ) Interrupt vector table
When an interrupt occurs, the CPU uses the interrupt number to look up the ISR address in the interrupt vector table.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Compared with vertical microinstructions, horizontal microinstructions are:
सही उत्तर: क) Wide, with little encoding, so many control signals can be issued in parallel
Horizontal microcode gives roughly one bit per control signal, so words are long but allow much parallelism and need no decoding.
💬 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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