Practice Computer MCQ Questions 26–43 out of 43. Free quiz with answers and explanations for UPSC, SSC, Railway exam preparation. Upgrade your information technology score with our detailed Computer Awareness GK quiz. Practice vital technical questions on computer hardware, operating systems, networking models, internet protocols, cybersecurity threats, database management systems, and common software shortcuts.
The AND gate requires Input A *AND* Input B to be 1 to trigger a 1 output value. [Memory Trick: Both this 'AND' that must be active to trigger downstream pipes!]
Ping uses ICMP echo requests to verify remote target connections and measures round-trip response times in milliseconds. [Memory Trick: Send a small sound 'ping' to hear an echo bounce back!]
Like a physical pile of plates (stack), the last plate placed on top is always the first one lifted off. [Memory Trick: Pile up your books in a vertical 'Stack' - you always grab the top/last book first!]
The Domain Name System (DNS) matches domain strings with their true routing IPs. [Memory Trick: 'D'omain 'N'ame 'S'hopper matches naming tags with address numbers!]
BIOS initializes physical hardware, performs the Power-On Self-Test (POST), and reads boot master sectors. [Memory Trick: The essential 'B'-eginning 'I'-nitial 'O'-perating 'S'ystem checking all wires!]
Ada Lovelace realized that Charles Babbage's mechanical engine could process symbols beyond simple math, and wrote down code loops for it. [Memory Trick: 'Ada' wrote 'A'lgo-loops before computer screens existed!]
SSH runs over TCP port 22, safeguarding console command channels. [Memory Trick: You need 'Double Two' (22) keys to build a secure remote bridge!]
JSON represents data structs in standard text, using key-value pairs and array notations to pass payloads between backends and clients. [Memory Trick: A lightweight chest of 'J'ava'S'cript 'O'bject 'N'otes = JSON!]
SIMD enables execution of mathematical processes across vectors simultaneously, which is critical for graphic processing units (GPUs). [Memory Trick: 'S'ingle 'I'nstruction driving 'M'ultiple 'D'ata lanes in a fast highway matrix!]
CSS designs colors, spacing, borders, layouts, and responsive queries across browser surfaces. [Memory Trick: 'C'olorful 'S'tylish 'S'kins for HTML bones = CSS!]
A Primary Key uniquely identifies database records, ensuring no duplicate rows can exist inside that index. [Memory Trick: The 'Primary' master key allows only 'No. 1' unique room numbers!]
UDP sends packet streams continuously without checking for receipt, skipping the heavy connection overhead of TCP. [Memory Trick: 'U'nchecked 'D'ata 'P'ush - fire and forget, keep the stream moving!]
Phishing emails/pages seek to trick victims into entering log-on keys directly into attacker-controlled databases. [Memory Trick: Thieves go 'Fishing' for your 'P'asswords with fake bait!]
Routers analyze packets' destination IP routes to dispatch them efficiently across interconnected networks. [Memory Trick: The 'Route' controller directs web traffic vehicles along proper road tracks!]
The Principle of Least Privilege minimizes risk of accidental or malicious damage by locking out unneeded permissions. [Memory Trick: Give users only the 'Least' amount of keys to keep the whole castle safe!]
Modern processors click multiple billion times per second, measured in Gigahertz (GHz). [Memory Trick: 'G'iga means billion, 'H'ert'z' means speed cycles per second!]
OOP uses classes, inheritance, encapsulation, and polymorphism to model software logic around distinct data objects. [Memory Trick: Model scripts into real life 'Objects' = OOP!]
DHCP automatically distributes network settings to devices connecting to local routers. [Memory Trick: 'D'ynamically 'H'ands 'C'omputer 'P'arameters to join local networks!]
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