CriticalRiver Software Engineer Interview Questions and Answers

Q1. Given the react machine coding example
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Q1. Explain about your projects
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Q1. Oops related questions
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Q2. C language quizzes
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Coding Rount
DSA Round + Puzzle
SQL + Project Discussion
JS

Dsa problems dp and tress problem

Q1. Tell me about your self
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Q2. Projects and intership
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Q1. Given an array Reverse array
Ans. 
Reverse array of strings
• Iterate through the array and swap elements from start to end

• Use two pointers, one at the beginning and one at the end, and swap elements until they meet
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Q2. Giaven a string Reverse string
Ans. 
Reverse a given string
• Use built-in functions like reverse() or loop through the string in reverse order

• Create a new string and append characters from the original string in reverse order

• Convert the string to an array of characters, reverse the array, and then join it back into a string
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Q3. Given array find sum of all elements
Ans. 
Calculate sum of all elements in a given array of strings
• Iterate through the array and convert each element to integer before adding to sum

• Handle edge cases like empty array or non-numeric elements

• Return the final sum after iterating through all elements
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Coding exercise related to probability

Q1. Database design for ride hailing service like uber, ola
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Q2. Tech stack needed to build a real time application
Ans. 
Tech stack for real time applications includes WebSocket, Node.js, Redis, and MongoDB.
• Use WebSocket for real-time communication between client and server

• Node.js for server-side logic and handling multiple connections efficiently

• Redis for caching and storing real-time data

• MongoDB for persistent data storage and retrieval
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