Quick Revision

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 29

Decimal 47 in octal?
57
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Binary 10111011 in decimal?
187
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2's complement of 00000101?
11111011
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Binary AND: 10101010 AND 11001100?
10001000
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Binary OR: 10101010 OR 01010101?
11111111
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Binary XOR: 1111 XOR 0101?
1010
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Binary 0.001 in decimal?
0.125
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Decimal 300 in binary?
100101100
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Boolean expression A + A'B simplifies to?
A + B
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De Morgan: NOT(A + B)?
NOT A AND NOT B
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How many unique values can 4 bits represent?
16
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Which storage technology uses magnetism?
HDD and magnetic tape
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CD-RW can?
Be erased and rewritten multiple times
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Blu-ray disc uses which laser color?
Blue-violet (405nm wavelength)
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Wi-Fi 6 (802.11ax) introduces?
OFDMA, MU-MIMO improvements and BSS Coloring for better multi-device efficiency
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4G LTE provides speeds up to?
100 Mbps to 1 Gbps (LTE-Advanced)
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iCloud is cloud storage by?
Apple
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OneDrive is cloud storage by?
Microsoft
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SaaS model means software is?
Delivered over internet as a service with no local installation
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Kubernetes etcd is?
Distributed key-value store holding cluster state and configuration
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The full form of CPU is?
Central Processing Unit
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Which memory stores data temporarily?
RAM
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DAC stands for?
Digital to Analog Converter
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Alt+F4 in Windows?
Closes current application/window
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Recycle Bin in Windows stores?
Temporarily deleted files before permanent removal
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To permanently delete without Recycle Bin use?
Shift+Delete
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PDF files are opened using?
Adobe Acrobat Reader or web browsers
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VLC Media Player is used for?
Playing various audio/video formats
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Which browser is developed by Google?
Chrome
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Computer Fundamentals → Number System 3

Hexadecimal BB in decimal?
187
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Convert 0.75 decimal to binary?
0.11
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Hexadecimal 12C in decimal?
300
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Computer Fundamentals → Generations of Computer 1

Which generation of computers used vacuum tubes?
First
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Computer Fundamentals → Input Devices 3

Which input device is used in ATMs?
Numeric keypad and card reader
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QWERTY keyboard gets its name from?
First six letters of top-left row
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Function keys on keyboard are labeled?
F1 to F12
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Computer Fundamentals → Output Devices 2

Which of the following is NOT an output device?
Keyboard
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Which type of printer makes physical impact on paper?
Dot matrix
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Computer Fundamentals → Memory Units 2

1 GB RAM equals?
1024 MB
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Which file extension indicates executable program in Windows?
.exe
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