Attempt all questions in brief. 2 x 10 = 20a. Differentiate between Object and Class.b. Describe the difference between Abstract Classes and Interfaces.c. List down the different types of Relationships in Class diagrams.d. Explain the terms Association, Aggregation, and Composition relationships.e. List down the different phases of Object-Oriented Analysis.f. Differentiate between Procedural and Object-Oriented language features.g. What is the namespace in C++? Explain its significance.h. Describe the concept of typecasting in C++.i. Discuss operator overloading in C++.j. Differentiate between private and public members of a class in C++

a. Object vs Class: A class is a blueprint or template that describes the behavior/state that the objects of the class all share. An object is an instance of a class.

b. Abstract Classes vs Interfaces: Abstract classes can have implementations for some of its members, but the interface can't have implementation for any of its members. Interfaces cannot have fields where as an abstract class can have fields.

c. Types of Relationships in Class diagrams: There are mainly four types of relationships: Association, Aggregation, Composition, and Inheritance.

d. Association, Aggregation, and Composition relationships: Association is a relationship where all objects have their own lifecycle and there is no owner. Aggregation is a specialized form of Association where all objects have their own lifecycle, but there is ownership. Composition is a specialized form of Aggregation where the child cannot exist independent of the parent.

e. Phases of Object-Oriented Analysis: The phases are: Problem definition, Object-oriented analysis, Object-oriented design, Implementation, and Testing.

f. Procedural vs Object-Oriented language features: Procedural programming is based upon the modular approach in which the larger programs are broken into procedures. Object-oriented programming is based upon the concept of objects, which contains data in the form of fields, also known as attributes and code in the form of procedures, also known as methods.

g. Namespace in C++: A namespace is a declarative region that provides a scope to the identifiers (names of the types, function, variables etc) inside it. It is used to organize code into logical groups and to prevent name collisions.

h. Typecasting in C++: Typecasting is a way to convert a variable from one data type to another data type. For example, if you want to store a 'long' value into a simple integer then you need to typecast 'long' to 'int'.

i. Operator overloading in C++: Operator Overloading means giving extended meaning beyond their predefined operational meaning. For example, we can overload an addition operator (+) to perform addition of two user-defined data types.

j. Private vs public members of a class in C++: Public members are accessible from anywhere where the object is visible while private members are only accessible within the class they are defined.