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 39

Which color model is used for printing?
CMYK (Cyan, Magenta, Yellow, Key/Black)
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Resolution of digital images is measured in?
DPI (Dots Per Inch) or PPI (Pixels Per Inch)
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Lossless compression preserves?
All original data — perfect reconstruction
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Lossy compression sacrifices?
Some data quality for smaller file size
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Which image format is lossless?
BMP (uncompressed) and PNG (lossless compressed)
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File extension .mp3 indicates?
Compressed audio file (MPEG-1 Audio Layer III)
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Which file format is used for vector graphics?
SVG (Scalable Vector Graphics)
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PDF was created by?
Adobe Systems (1992)
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Which component determines computer speed most?
CPU clock speed and architecture
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What is 'booting' a computer?
Process of starting the computer and loading the operating system
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Cold boot vs warm boot: cold boot is?
Starting computer from completely powered-off state
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The bootstrap loader is responsible for?
Loading the OS from storage into RAM during boot
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GRUB is?
Grand Unified Bootloader — bootloader for Linux systems
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Which of these represents 1 Terabyte?
1024 GB
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How many bits does IPv6 address have?
128
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CIDR notation /16 means how many bits for network?
16
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Which protocol maps IP addresses to MAC addresses?
ARP (Address Resolution Protocol)
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Broadcast IP address 255.255.255.255 is?
Limited broadcast — sends packet to all hosts on local network
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IEEE 802.3 standard defines?
Ethernet (wired LAN)
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IEEE 802.11 standard defines?
Wi-Fi (Wireless LAN)
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Bandwidth in networking means?
Maximum data transfer rate of a network connection
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Network topology refers to?
Physical or logical arrangement of devices in a network
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In bus topology, all devices connect to?
Single shared backbone cable
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Full mesh topology provides?
Maximum redundancy — every device connects to every other device
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Which network type covers a metropolitan area?
MAN (Metropolitan Area Network)
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PAN (Personal Area Network) range is approximately?
10 m
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RJ-45 connector is used for?
Ethernet (wired LAN) connections
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RJ-11 connector is used for?
Analog telephone lines (4-pin or 6-pin)
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Cat5e cable supports speeds up to?
1 Gbps (with bandwidth up to 100 MHz)
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PoE standard IEEE 802.3af provides?
15.4W maximum to powered device
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SNMP MIB stands for?
Management Information Base — database of manageable network objects
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Which routing protocol has lowest Administrative Distance?
Connected interface (0)
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VLSM (Variable Length Subnet Masking) allows?
Different subnet sizes within the same network — efficient IP allocation
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NAT (Network Address Translation) allows?
Multiple private IP devices to share one public IP for internet access
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DNSSEC protects against?
DNS cache poisoning and spoofing by adding cryptographic signatures
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How many usable hosts in a /30 subnet?
2
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Subnetting divides a network to?
Create smaller network segments and reduce broadcast traffic
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In MS Word, Ctrl+Enter inserts a?
Page break
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Table of Contents in MS Word updates when?
When right-clicked and Update Field selected, or F9 pressed
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Computer Fundamentals → Internet Basics 1

Which protocol is used for email authentication SPF?
DNS TXT records containing SPF policy
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