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Computer MCQs With Answers
596 Computer MCQs for CSS, PPSC, FPSC, NTS and entry-test preparation. Take a scored quiz instead →
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What type of malware tricks users into downloading or executing it by disguising itself as legitimate, harmless software?
AComputer Worm
BTrojan Horse
CRansomware
DSpyware
Which CPU register holds the memory address of the next instruction waiting to be fetched and executed?
AMemory Data Register (MDR)
BInstruction Register (IR)
CProgram Counter (PC)
DAccumulator (AC)
In cryptography, what type of encryption utilizes two distinct keys—a Public Key for encryption and a Private Key for decryption?
ASymmetric Encryption
BAsymmetric Encryption
CHashing
DSteganography
Which networking device operates at the Data Link Layer (Layer 2) of the OSI model and uses MAC addresses to forward frames to specific target ports?
AHub
BRouter
CSwitch
DRepeater
Which security measure monitors incoming and outgoing network traffic based on predefined security rules to block unauthorized access?
AAntivirus
BFirewall
CIntrusion Detection System (IDS)
DProxy Server
What metric measures the maximum theoretical data transfer capacity of a network communication channel over a given period?
ALatency
BThroughput
CBandwidth
DJitter
Which cryptographic hash algorithm produces a fixed 256-bit (32-byte) digest output and is widely used in Bitcoin and TLS standard security?
AMD5
BSHA-1
CSHA-256
DDES
In Linux Operating Systems, which command changes directory access and file permissions for users, groups, and others?
Achown
Bchmod
Cchgrp
Dls -l
Which software development methodology emphasizes iterative delivery, customer collaboration, cross-functional self-organizing teams, and flexibility to changing requirements?
AWaterfall Model
BSpiral Model
CAgile Methodology
DV-Model
What primary key constraint property prevents duplicate values and ensures every row in a database table has a unique, non-null identifier?
AForeign Key
BPrimary Key
CCheck Constraint
DDefault Constraint