Reliable Data Services Interview Questions and Answers for Freshers

HashMap is a data structure that stores key-value pairs and uses hashing to retrieve values quickly.

• HashMap uses an array of buckets to store key-value pairs

• The hash code of the key is used to determine the index of the bucket

• If multiple keys have the same hash code, they are stored in a linked list within the bucket

• When retrieving a value, the hash code of the key is used to find the bucket and then the linked list is...read more

OOP in Java stands for Object-Oriented Programming which is a programming paradigm based on objects.

• OOP focuses on creating objects that have properties and methods

• Encapsulation, Inheritance, and Polymorphism are the key concepts of OOP

• Java supports OOP through classes and interfaces

• Example: A car can be represented as an object with properties like color, model, and methods like start, stop, and accelerate

To do sales effectively, you need to understand your product, build relationships, communicate persuasively, and follow up consistently.

• Understand your product: Know the features, benefits, and unique selling points of what you're selling.

• Build relationships: Establish trust and rapport with potential customers by listening, empathizing, and addressing their needs.

• Communicate persuasively: Clearly articulate how your p...read more