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GK One-Line Question & Answer

15541+ short questions with short answers, covering every category and sub-category on the site — no long articles to scroll through. Good for a fast recap before an exam, or a few minutes of daily practice.

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Computer Fundamentals → Introduction to Computer 38

Which is NOT a valid SQL aggregate function?
FIRST()
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1's complement of binary 1010 is?
0101
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Binary 10000 equals decimal?
16
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Decimal 128 in binary is?
10000000
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Parity check detects how many bit errors?
Single bit errors only
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ASCII code of uppercase A is?
65
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ASCII code of lowercase a is?
97
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ASCII code 32 represents?
Space character
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UTF-8 uses how many bytes for ASCII characters?
1
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IEEE 754 single precision uses how many bits?
32
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Boolean AND of 1 AND 0?
0
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Boolean NOR of 0 NOR 0?
1
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Sum of Products (SOP) form is?
OR of AND terms
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Karnaugh Map is used for?
Simplifying Boolean expressions by grouping adjacent minterms
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Half adder outputs are?
Sum (A XOR B) and Carry (A AND B)
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Multiplexer 4:1 requires how many select lines?
2
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D flip-flop captures D input on?
Active clock edge
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Modulo-8 counter uses how many flip-flops?
3
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Gray code consecutive values differ by?
Exactly one bit
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BCD uses how many bits per decimal digit?
4
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7-segment display has how many segments?
7
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Flash ADC is the?
Fastest but uses most comparators
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Excess-3 code of decimal 5 is?
1000
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Hamming code is used for?
Single-bit error detection AND correction
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CRC uses which type of arithmetic?
XOR-based polynomial (modulo-2) arithmetic
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Reed-Solomon codes are used in?
QR codes, CDs, DVDs for burst error correction
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Which encoding is most space-efficient for English text?
UTF-8
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Floating point overflow occurs when?
Result exceeds maximum representable value
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IEEE 754 double precision uses?
64 bits (1 sign + 11 exponent + 52 mantissa)
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Bit trick x AND (x-1) clears?
Lowest set bit of x
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NIC (National Informatics Centre) provides?
IT infrastructure and e-governance services to Government of India
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Rajasthan Sampark portal enables?
Citizens to register and track grievances against government departments
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GeM (Government e-Marketplace) is used for?
Government procurement of goods and services
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India's first electronic computer was installed at?
Indian Statistical Institute Kolkata (1956)
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Bhamashah scheme in Rajasthan was?
Women-centric financial inclusion scheme using biometric bank accounts
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SPF (Sender Policy Framework) prevents?
Email spoofing by listing authorized mail servers for a domain
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DKIM adds to emails?
Digital signature verifying email was not modified and confirming sender domain
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DMARC builds on SPF and DKIM by?
Providing policy for handling authentication failures and reporting
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Computer Fundamentals → Number System 1

Hexadecimal FF in decimal is?
255
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Computer Fundamentals → Memory Units 1

PARAM Siddhi-AI supercomputer ranked in?
Global TOP500 supercomputer list (rank 63 in Nov 2020)
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