CodeClouds Reactjs Developer Interview Questions and Answers

Platform - Mettl
3 Questions of medium level difficulty to do in 2 hours, typically contain concepts like DSA, DP etc.

Q1. What is structure padding?
Ans. 
Structure padding is the insertion of unused bytes between structure members to align them on memory boundaries.
• Padding is added to ensure that each member of a structure starts at a memory address that is a multiple of its size.

• Padding is compiler-dependent and can vary between different platforms and architectures.

• Padding can affect the size of a structure and the performance of the program.

• Example: struct example { ...read more
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Q2. College Project discussion
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Q3. Form a dictionary from name.
Ans. 
Forming a dictionary from name
• Create an empty dictionary

• Iterate through each character in the name

• Add the character as a key and its frequency as value in the dictionary
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1 hour 3 questions easy to medium leetcode.

It was good ...questions were easy and straight forward..basic questions based on ds algo

5 dsa questions + 1 sql + 30 mcq in round 1

Interview round asked a simple question find the 2 largest num in array then moved to oops and some one sql question

Q1. Java script, React JS
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Q2. Data structures and algorithms
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Q1. Write an SQL query to fetch duplicates.
Ans. 
SQL query to fetch duplicates
• Use GROUP BY and HAVING clause to identify duplicates

• Select columns to be checked for duplicates

• Example: SELECT column_name, COUNT(*) FROM table_name GROUP BY column_name HAVING COUNT(*) > 1;
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Q2. Write SQL query to fetch nth highest Salary.
Ans. 
SQL query to fetch nth highest Salary
• Use the ORDER BY clause to sort the salaries in descending order

• Use the LIMIT clause to fetch the nth highest salary

• Consider handling cases where there might be ties for the nth highest salary
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Q1. Java,oop, microservice, JPA
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Q2. Spring boot , MySQL
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Q1. Java, spring boot
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Q2. Microservice, rest api
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