Echo IT Solutions Interview Questions and Answers

There was some basic theoretical question and some basic coding question

Q1. What is doubly LinkedList?
Ans. 
A doubly LinkedList is a data structure where each node contains a reference to the next and previous node.
• Nodes have two pointers - one to the next node and one to the previous node

• Allows traversal in both directions

• Example: Doubly LinkedList: 1 <-> 2 <-> 3 <-> 4
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Q2. What is B-tree and why it is used?
Ans. 
B-tree is a self-balancing tree data structure that maintains sorted data and allows for efficient search, insertion, and deletion operations.
• B-tree is commonly used in databases and file systems for indexing.

• It is designed to reduce the number of disk accesses required to perform operations on large datasets.

• B-tree nodes can have multiple children, typically ranging from 2 to a few hundred.

• Example: In a database, B-tr...read more
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Q1. Abt job role & work experience
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