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Computer MCQs With Answers
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Which type of database JOIN returns all records from the left table and matching records from the right table, filling with NULL where no match exists?
AINNER JOIN
BRIGHT JOIN
CLEFT OUTER JOIN
DFULL OUTER JOIN
Which semiconductor technology is used to manufacture modern Dynamic RAM (DRAM) cell capacitors?
ABipolar Junction Transistors (BJT)
BMetal-Oxide-Semiconductor (MOS)
CVacuum Tubes
DRelays
Which linear data structure operates strictly on a Last-In, First-Out (LIFO) access mechanism?
AQueue
BLinked List
CStack
DBinary Tree
In the OSI (Open Systems Interconnection) reference model, which layer is responsible for end-to-end packet delivery and logical IP addressing?
AData Link Layer
BNetwork Layer
CTransport Layer
DSession Layer
What is the worst-case time complexity of the standard QuickSort algorithm when selecting a poor pivot element on an already sorted array?
AO(n log n)
BO(n)
CO(n²)
DO(log n)
Which network protocol automatically assigns IP addresses, subnet masks, and default gateways to devices on a network?
ADNS
BDHCP
CFTP
DSNMP
In Object-Oriented Programming (OOP), what term describes the ability of a single interface or method name to take multiple forms based on the object context?
AEncapsulation
BInheritance
CPolymorphism
DAbstraction
What default port number is used by the secure HTTP protocol (HTTPS) encrypted via SSL/TLS?
APort 80
BPort 21
CPort 443
DPort 25
Which search algorithm requires data to be sorted beforehand and repeatedly divides the search interval in half?
ALinear Search
BBinary Search
CDepth-First Search (DFS)
DBreadth-First Search (BFS)
Which IP address range represents the standard Class C private IPv4 address space defined by RFC 1918?
A10.0.0.0 to 10.255.255.255
B172.16.0.0 to 172.31.255.255
C192.168.0.0 to 192.168.255.255
D127.0.0.0 to 127.255.255.255