Crest Infosystems Web Developer Interview Questions and Answers

Basic aptitude questions about profit loss, percentage, a few were tricky but solvable.

Q1. What are different hooks that you've used in react.js
Ans. 
Some common hooks used in React.js are useState, useEffect, useContext, and useRef.
• useState - for managing state in functional components

• useEffect - for handling side effects in functional components

• useContext - for accessing context in functional components

• useRef - for accessing DOM elements or values in functional components
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Q2. What is normalisation in DBMS
Ans. 
Normalization in DBMS is the process of organizing data in a database to reduce redundancy and improve data integrity.
• Normalization involves breaking down a database into smaller, more manageable tables.

• It helps in reducing data redundancy by storing data in a structured way.

• Normalization ensures data integrity by minimizing data anomalies.

• There are different normal forms like 1NF, 2NF, 3NF, BCNF, etc.

• Example: In a dat...read more
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Q3. Basic javascript questions
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