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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 36

Which number base is ideal for human reading of binary data?
Hexadecimal
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Two's complement is used because?
It allows single representation of zero and simplifies arithmetic
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Signed magnitude representation has?
Two representations of zero (+0 and -0)
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Gray code consecutive values differ by?
Exactly one bit
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Which is the correct ASCII range for digits 0-9?
48-57
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ASCII codes 65-90 represent?
Uppercase letters A-Z
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ASCII codes 97-122 represent?
Lowercase letters a-z
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ASCII code 32 represents?
Space character
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ASCII code 0-31 are?
Control characters
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UTF-8 encoding uses how many bytes for ASCII characters?
1
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UTF-8 can use up to how many bytes for a single character?
4
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Binary subtraction can be performed using?
Both methods
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Decimal 0.1 in binary is?
0.00011001100... (repeating)
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Binary 10000000000 in decimal is?
1024
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Which of these correctly converts hex CAFE to decimal?
51966
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BCD addition of 9+4: result before correction?
1101
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Excess-3 code is obtained by?
Adding 3 to BCD
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Which code is self-complementing?
Excess-3
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NAND gate output is LOW only when?
Both inputs are HIGH
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NOR gate output is HIGH only when?
Both inputs are LOW
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XNOR gate output is HIGH when?
Both inputs are same
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How many gates are needed to implement half adder using NAND?
5
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Multiplexer (MUX) selects?
Output line based on control signal
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Demultiplexer (DEMUX) routes?
Single input to one of many outputs
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Encoder converts?
One-of-N input to binary code
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Decoder converts?
Binary to one-of-N output
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SR flip-flop forbidden state occurs when?
S=1, R=1
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D flip-flop output at clock edge is?
Same as D input
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JK flip-flop with J=K=1 at clock edge?
Toggles output
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Which flip-flop eliminates the forbidden state of SR flip-flop?
JK
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Counter in digital electronics?
Counts clock pulses and cycles through states
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Synchronous counter vs asynchronous: synchronous counter?
All flip-flops clocked simultaneously
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DAC (Digital to Analog Converter) converts?
Digital binary data to analog signal
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ADC (Analog to Digital Converter) converts?
Analog signal to digital binary data
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Nyquist theorem states sampling rate must be?
At least twice the highest signal frequency
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Which of these is a complete computer fundamentals topic covered in RMSSSB exams?
Computer Generations, I/O, Memory, H/W, S/W, Data Representation, Number Systems
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Computer Fundamentals → Number System 3

1 Exabyte equals?
1024 PB
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1 Zettabyte equals?
1024 EB
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Hexadecimal DEAD in decimal is?
57005
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Computer Fundamentals → Memory Units 1

Register in digital electronics stores?
n-bit data using n flip-flops
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