कम्प्युटर / सूचना प्रविधि कम्प्युटर अपरेटर (पाँचौँ तह) र सहायक – प्राविधिक पत्र
कम्प्युटर / सूचना प्रविधि – कम्प्युटर अपरेटर (पाँचौँ तह) र सहायक
Computer Operator & Assistant · 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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A hard disk sold as '500 GB' (decimal, 10^9 bytes per GB) is shown by an operating system that uses binary units as about:
सही उत्तर: क) 465 GiB
500 x 10^9 / 1024^3 = 500,000,000,000 / 1,073,741,824 = about 465.7 GiB.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A network link transfers data at 100 Mbps. Ignoring overheads, how many megabytes per second is this?
सही उत्तर: ख) 12.5 MB/s
There are 8 bits in a byte, so 100 megabits per second / 8 = 12.5 megabytes per second.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Computer monitors produce colours using which additive colour model?
सही उत्तर: घ) RGB
Screens emit red, green and blue light in varying intensities; adding all three at full gives white.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Uncompressed CD audio uses 44.1 kHz sampling, 16 bits per sample and 2 channels. Its bit rate is:
सही उत्तर: क) 1411.2 kbps
44,100 x 16 x 2 = 1,411,200 bits per second = 1411.2 kbps.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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To digitise an analog signal without aliasing, the sampling rate must be at least:
सही उत्तर: ग) Twice the highest frequency in the signal
By the Nyquist-Shannon sampling theorem, sampling must exceed twice the highest signal frequency.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A MIDI file differs from a WAV file mainly because MIDI stores:
सही उत्तर: ग) Instructions such as notes and instruments rather than recorded sound
MIDI is a set of musical event messages that a synthesiser plays back; WAV stores the sampled audio waveform itself.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Which image format uses lossy compression and is the most common for photographs?
सही उत्तर: क) JPEG
JPEG discards detail that the eye barely notices to achieve small files; PNG and GIF are lossless and BMP is usually uncompressed.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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The GIF image format supports a palette of at most:
सही उत्तर: ख) 256 colours
GIF uses 8-bit indexed colour, so each image can use at most 2^8 = 256 colours.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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Unlike raster (bitmap) images, vector graphics:
सही उत्तर: घ) Can be scaled to any size without losing sharpness
Vector images store shapes as mathematical descriptions (lines, curves), so they are redrawn sharply at any size.
💬 टिप्पणी / गल्ती रिपोर्ट (०)
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A digital camera captures images using an image sensor of which type?
सही उत्तर: घ) CCD or CMOS
Charge-coupled devices (CCD) and CMOS sensors convert light into electrical signals for each pixel.
💬 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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