Airports Authority of India Ground Staff Interview Questions and Answers

HANA is an in-memory database and application development platform developed by SAP.

• HANA stands for High-Performance Analytic Appliance.

• It allows real-time processing of large amounts of data.

• It can be used for data warehousing, analytics, and application development.

• HANA is used by businesses to gain insights from their data and make better decisions.

• Examples of companies using HANA include Coca-Cola, Nestle, and Merc

An array is a collection of elements of the same data type, stored in contiguous memory locations.

• Arrays can be one-dimensional or multi-dimensional

• Elements in an array can be accessed using their index

• Arrays can be initialized with values at declaration

• Arrays can be sorted or searched using built-in functions

OOPs stands for Object-Oriented Programming. It is a programming paradigm that uses objects to design applications.

• OOPs focuses on creating reusable code and organizing it into objects.

• It uses concepts like inheritance, encapsulation, and polymorphism.

• Examples of OOPs languages are Java, C++, Python, etc.

An abstract class is a class that cannot be instantiated and is used as a base class for other classes.

• An abstract class can have abstract methods that must be implemented by its subclasses.

• Abstract classes can have non-abstract methods and fields.

• An abstract class can be used to define a common interface for a group of related classes.

• Example: Animal is an abstract class and Dog, Cat, and Bird are its subclasses.

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