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TCS NQT GuideTCS NQT Programming Logic & CS FundamentalsObject-Oriented Programming (OOPs) Concepts for TCS Technical Round

Object-Oriented Programming (OOPs) Concepts for TCS Technical Round

Learn core concepts, essential formulas, and attempt practice questions designed on the latest TCS NQT testing patterns.

Key Concepts & Formulas

  • 1Four Pillars: Encapsulation, Abstraction, Inheritance, Polymorphism.
  • 2Function overloading: Compile-time polymorphism.
  • 3Virtual functions: Runtime polymorphism.

TCS NQT Style Practice Questions

Practice Question 1

Which OOP concept hides implementation details and shows only functionality?

A) Abstraction
B) Encapsulation
C) Polymorphism
D) Inheritance

Correct Answer: A) Abstraction

Step-by-step Solution: Abstraction hides the internal complexity, exposing only essential features. Encapsulation wraps data and code together.

Practice Question 2

What is method overriding?

A) Subclass providing a specific implementation of a parent method
B) Writing functions with same name but different arguments
C) Deleting a method
D) Copying parent classes

Correct Answer: A) Subclass providing a specific implementation of a parent method

Step-by-step Solution: Method overriding occurs when a child class redefines a parent class method with the exact same signature (runtime polymorphism).

Study Pro-Tip

Learn class constructors, destructors, and access modifiers (public, private, protected).

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