HCLTech SSE Interview Questions and Answers

Components are individual parts that make up a larger system or object.

• Components can be physical or digital.

• Examples of physical components include nuts and bolts in a machine.

• Examples of digital components include software modules in a computer program.

• Components work together to create a functioning whole.

• Components can be replaced or upgraded without replacing the entire system.

Hashmap is a data structure that stores key-value pairs and uses hashing to locate values based on their keys.

• Hashmap uses an array to store the key-value pairs

• The key is hashed to generate an index in the array

• If two keys hash to the same index, a collision occurs and the values are stored in a linked list

• Hashmap provides constant time complexity for insertion, deletion, and retrieval of values