MOST PROBABLE 2026 EXAM QUESTIONS
(COMPUTER SCIENCE – Theory)
Based on 2015-25 trend + Syllabus Coverage.
UNIT-1 OOP IN C++
1-MARK
What is object?
What is class?
Define encapsulation.
What is polymorphism?
What is inheritance?
What is constructor?
What is destructor?
What is function overloading?
What is data hiding?
What is abstract class?
What is concrete class?
What is instance?
What is member function?
What is data member?
What is visibility mode?
2-MARK
Define polymorphism with example.
Difference between class and object.
Define constructor and destructor.
Difference between abstract and concrete class.
Define inheritance.
Define function overloading.
Difference between pass-by-value and pass-by-reference.
Define encapsulation.
Advantages of OOP.
Define namespace.
What is template in C++?
Define inline function.
3-MARK
Explain constructor overloading.
Explain function overloading with example.
Explain inheritance with example.
Explain encapsulation in C++.
Difference between POP and OOP.
Explain visibility modes.
Difference between base class and derived class.
Explain dynamic memory allocation.
Explain pointers and reference variables.
5-MARK
Explain advantages of OOP over POP.
Explain types of inheritance with diagram.
Explain polymorphism implementation in C++.
Write C++ program using class and object.
Explain constructor and destructor with example.
UNIT-2 DATA STRUCTURE
1-MARK
What is array?
What is stack?
What is queue?
What is FIFO?
What is LIFO?
What is data structure?
What is linear data structure?
What is non-linear data structure?
What is searching?
What is sorting?
2-MARK
Define queue.
Define stack.
Define postfix notation.
Define sorting.
Define linear search.
Define binary search.
Difference between linear and non-linear DS.
Define static vs dynamic DS.
Define 2-D array.
3-MARK
Explain PUSH and POP operations.
Explain queue operations.
Explain insertion sort.
Difference between 1-D and 2-D arrays.
Explain traversal vs searching.
Compare stack and queue.
Explain circular queue.
Explain binary search steps.
5-MARK
Explain stack and queue differences.
Explain insertion sort with example.
Write algorithm for queue operations.
Explain searching vs sorting.
Write C++ program for sorting array.
UNIT-3 DBMS & SQL
1-MARK
What is database?
What is relational database?
What is relational algebra?
What is SQL?
What is primary key?
What is tuple?
What is relation?
What is domain?
What is table?
2-MARK
Define relational algebra.
Define DDL and DML.
Define SQL.
Define primary key and candidate key.
Define DBMS.
Advantages of SQL.
Define column constraints.
What is XML?
3-MARK
Difference between primary key and candidate key.
Explain SQL aggregate functions.
Explain SQL clauses.
Explain relational algebra operations.
Explain DDL vs DML.
Explain equi-join.
Explain SQL data types.
5-MARK
Explain SQL clauses with example.
Explain DBMS concepts.
Explain relational model keys.
Write SQL table creation commands.
Explain JOIN operations.
UNIT-4 BOOLEAN ALGEBRA
1-MARK
What is Boolean algebra?
What is logic gate?
What is truth table?
What is SOP?
What is POS?
What is Boolean variable?
2-MARK
State De-Morgan laws.
Define K-map simplification.
Define Boolean operators.
Uses of Boolean algebra.
Define SOP and POS.
3-MARK
Explain logic gates.
Explain Boolean operators.
Explain K-map.
Explain De-Morgan with example.
Explain SOP and POS forms.
5-MARK
Explain Boolean operators with truth table.
Explain K-map minimization.
Explain logic gates with diagram.
Explain Boolean algebra laws.
UNIT-5 NETWORKING & OSS
1-MARK
What is topology?
What is network?
What is bandwidth?
What is protocol?
What is LAN?
What is WAN?
What is switching?
What is TCP/IP?
2-MARK
Define bandwidth.
Define wireless communication.
Define TCP/IP.
Uses of optical fibre.
Define FTP.
Define networking.
Define transmission media.
3-MARK
Explain switching techniques.
Explain network topologies.
Explain client-side scripting.
Explain satellite communication.
Difference LAN vs WAN.
Explain coaxial cable uses.
Explain protocols.
5-MARK
Explain network topologies.
Explain domain names.
Explain transmission media.
Explain networking concepts.
Explain protocols (SMTP vs POP3).
VERY HIGH-PROBABILITY 2026 (TOP 25)
Constructor overloading
Function overloading
Inheritance types
Encapsulation
Stack operations
Queue operations
Stack vs Queue
Insertion sort
1-D vs 2-D array
SQL clauses
DDL vs DML
Primary vs Candidate key
Relational algebra
De-Morgan laws
K-map
Boolean operators
Logic gates
Network topologies
Switching techniques
Bandwidth
TCP/IP
Optical fibre
Client-side scripting
Domain name
SMTP vs POP3
MOST PROBABLE 2026 QUESTIONS WITH YEAR FREQUENCY
(2015–2025 PAPERS ANALYSIS)
★★★★★ asked 5+ yrs
★★★★ asked 3–4 yrs
★★★ asked 2 yrs
★★ rare
★ low
UNIT-1 OOP IN C++
1-MARK
2-MARK
3-MARK
5-MARK
UNIT-2 DATA STRUCTURE
1-MARK
2-MARK
3-MARK
5-MARK
UNIT-3 DBMS & SQL
1-MARK
2-MARK
3-MARK
5-MARK
UNIT-4 BOOLEAN ALGEBRA
1-MARK
2-MARK
3-MARK
5-MARK
UNIT-5 NETWORKING
1-MARK
2-MARK
3-MARK
5-MARK
🔥 MOST LIKELY 2026
★★★★★
Stack operations
Queue operations
Sorting
De-Morgan
K-map
LAN vs WAN
Bandwidth
OOP basics
★★★★
Polymorphism
Constructor
Function overloading
SQL functions
Topologies
Optical fibre
★★★
Encapsulation
DDL vs DML
Relational algebra
Switching
Protocols
Arrays
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