AVIN Systems Senior Software Engineer Interview Questions and Answers

1 hour duration. Sliding window problem. On hacker rank platform. Expected to write a working code and solve it optimally/scalable solution.

Q1. Again a coding test. LLD + hash map. 1 hour on hacker rank.
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Q1. Techical questions and coding questions related profile.
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Q2. Basic concepts about your programming skills.
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Q1. Delete nth node from end in linked list
Ans. 
To delete the nth node from the end in a linked list, we can use a two-pointer approach.
• Use two pointers, one to traverse the list and another to keep track of the nth node from the end.

• Move the second pointer n steps ahead of the first pointer.

• When the second pointer reaches the end of the list, the first pointer will be at the nth node from the end.

• Adjust the pointers to delete the nth node.
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Q2. Project discussion
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Question on dsa and string theory along with oops concepts

Q1. Question on java strings and arrays
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Q1. DSA - level order traversal, sliding window.
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Q1. Atomic transaction in distributed system
Ans. 
Atomic transactions ensure that all operations in a transaction are completed successfully or none at all in a distributed system.
• Atomic transactions guarantee that all operations within a transaction are either all successful or all rolled back.

• In distributed systems, atomic transactions are crucial for maintaining data consistency across multiple nodes.

• ACID properties (Atomicity, Consistency, Isolation, Durability) a...read more
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You either get a problemset on hackerearth or the interviewer gives it to you live. Question difficulty: Easy Level dsa or machine coding questions.

If you do extremely well in the first round yoy do not get the assignment.

Q1. Discussions regarding projects and deep dive into the tech stack.
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Q2. What were the projects you worked on?
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Q3. How did you scale the system
Ans. 
We scaled the system by implementing horizontal scaling and load balancing.
• Implemented horizontal scaling by adding more servers to the system

• Implemented load balancing to distribute the workload evenly across servers

• Used caching to reduce database load

• Optimized database queries and indexes

• Implemented asynchronous processing to handle high traffic

• Used CDN to serve static content

• Implemented auto-scaling to handle sudden
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It was a 1 hour Technical screening round, coding question in java (you cna choose your own language). They asked a difficult version of regex matching question (Leetcode medium-hard).