Shri Chhatrapati Shivaji Maharaj College of Engineering Computer Engineer Interview Questions, Process, and Tips

Object is an instance of a class that has its own set of properties and methods. A class is a blueprint for creating objects.

• An object is a real-world entity with its own set of attributes and behaviors.

• A class is a template or blueprint for creating objects.

• Objects are created from classes using the 'new' keyword.

• Classes can have properties (variables) and methods (functions).

• Inheritance allows classes to inherit prop...read more

Overloading is having multiple methods with the same name but different parameters. Overriding is having a method in child class with the same name and signature as in parent class.

• Overloading is compile-time polymorphism while overriding is runtime polymorphism.

• Overloading is done in the same class while overriding is done in different classes.

• Overloading is used to provide different implementations of the same method...read more

Inheritance is a mechanism in object-oriented programming where a new class is created by inheriting properties of an existing class.

• Inheritance allows for code reuse and promotes code organization.

• The existing class is called the parent or superclass, while the new class is called the child or subclass.

• The child class inherits all the properties and methods of the parent class, and can also add its own unique properti...read more

Trigger is a database object that executes automatically in response to certain events. Cursor is a database object used to manipulate data.

• Triggers are used to maintain data integrity and consistency.

• Triggers can be used to audit changes made to the database.

• Cursors are used to iterate through a set of rows returned by a query.

• Cursors can be used to update or delete rows in a table.

• Triggers and cursors are commonly us

Union and intersection are set operations used in mathematics and computer science.

• Union combines two sets and removes duplicates

• Intersection returns the common elements between two sets

• Example of union: {1,2,3} union {3,4,5} = {1,2,3,4,5}

• Example of intersection: {1,2,3} intersection {3,4,5} = {3}

Encapsulation is the process of hiding implementation details and exposing only necessary information.

• Encapsulation helps in achieving data abstraction and information hiding.

• It allows for better control over data and prevents unauthorized access.

• An example of encapsulation is a class in object-oriented programming, where the data members are private and can only be accessed through public methods.