OOPS · EASY CODEX

OOPs Interview Questions — Easy

Q: What is Object-Oriented Programming (OOP) and how does it differ from procedural programming?

- OOP: A paradigm organizing software around objects (data combined with behavior) rather than actions or pure logic. - Procedural: Organizes software sequentially around functions or procedures proce

Q: What is a Class and how does it differ from an Object?

- Class: A static blueprint, template, or user-defined data type that defines variables (state) and methods (behavior) common to all objects of its kind. - Object: A dynamic, runtime instance of a cla

Q: Explain the concept of Encapsulation and its primary benefits.

- Definition: The grouping of data (attributes) and the methods (behavior) that operate on that data into a single unit (class), while restricting direct access to some of the object's components. - B

Q: What is Abstraction in OOP, and how is it different from Encapsulation?

- Abstraction: The process of hiding complex implementation details and showing only the essential features to the outside world. It answers what an object does rather than how it does it. - Encapsula

Q: What is Inheritance, and what problem does it solve?

- Definition: A mechanism where a new class (subclass/child) acquires the properties and behaviors of an existing class (superclass/parent). - Problems Solved: - Code Redundancy: Avoids rewriting comm

Core concepts, definitions, basic syntax, and first principles expected in round 1 screening.

50 Theory Questions5 Free Model Answers

THEORY QUESTIONS & SOLUTIONSShowing 5 of 50 questions

Q1What is Object-Oriented Programming (OOP) and how does it differ from procedural programming?

OOP: A paradigm organizing software around objects (data combined with behavior) rather than actions or pure logic.
Procedural: Organizes software sequentially around functions or procedures processing separate, detached data.
Key Differences: OOP promotes encapsulation, data security, code reuse, and modularity; Procedural is prone to global state mutation and harder to maintain as systems scale.

Q2What is a Class and how does it differ from an Object?

Class: A static blueprint, template, or user-defined data type that defines variables (state) and methods (behavior) common to all objects of its kind.
Object: A dynamic, runtime instance of a class. It occupies physical memory and holds specific values for the defined variables.
Analogy: A class is a house blueprint; an object is the physical house built from that blueprint.

Q3Explain the concept of Encapsulation and its primary benefits.

Definition: The grouping of data (attributes) and the methods (behavior) that operate on that data into a single unit (class), while restricting direct access to some of the object's components.
Benefits:
- Data Hiding: Prevents unauthorized modifications of internal state.
- Flexibility/Maintainability: Internal class implementation can change without affecting external callers.
- Control: Allows validation of inputs via getter and setter methods.

Q4What is Abstraction in OOP, and how is it different from Encapsulation?

Abstraction: The process of hiding complex implementation details and showing only the essential features to the outside world. It answers what an object does rather than how it does it.
Encapsulation: The process of binding data and code together and hiding the internal details (information hiding).
Difference: Abstraction is a design-level concept focused on reducing complexity; Encapsulation is an implementation-level concept focused on securing and hiding data.

Q5What is Inheritance, and what problem does it solve?

Definition: A mechanism where a new class (subclass/child) acquires the properties and behaviors of an existing class (superclass/parent).
Problems Solved:
- Code Redundancy: Avoids rewriting common code across multiple classes.
- Polymorphism Support: Establishes an "Is-A" relationship, enabling dynamic method dispatch.
- Extensibility: Enhances existing functionality without modifying the original code.

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