Circles.Life Senior Software Engineer Interview Questions and Answers

Q1. Find nth elements from last in linked list
Ans. 
Use two pointers to find the nth element from the end of a linked list.
• Use two pointers, one moving n steps ahead of the other

• When the first pointer reaches the end, the second pointer will be at the nth element from the end
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Q2. Difference between hashmap and concurrent hashmap
Ans. 
HashMap is not thread-safe while ConcurrentHashMap is thread-safe and allows concurrent access.
• HashMap is not thread-safe and can lead to ConcurrentModificationException if accessed by multiple threads simultaneously.

• ConcurrentHashMap allows concurrent access by multiple threads without the need for external synchronization.

• ConcurrentHashMap achieves thread-safety by dividing the map into segments, allowing multiple th...read more
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30min duration C coding 10 questions asked

1hr duration interviewer will be giving some random C questions to code

Q1. System programming
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Q2. System design, os concepts
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Q1. Technical Interview + Coding
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Q1. Technical Interview
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The coding test was for 90 mins, and comprised of questions from topics such as DP and hashtables. It was taken on hackerrank platform

Q1. One question related to hashing (particularly about hashcode and equals method)
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Q2. A variation of number of connected islands from graph
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Q1. Thread synchronisation, print alternate numbers using 5 different threads
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Q2. C++ Related questions were asked, in which I was asked about how can I find the size of Object, difference between malloc and calloc. What are semaphores and how are they used
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Q1. It was completely on the project worked on using the spring boot. 1)how to handle if the applciation is restarting continuously 2)how to load multiple applccation property file in sequential way 3)how to h...read more
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Q1. Project related questions
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Q1. Basic PHP Questions on Arrays, implode, explode function difference, include, require difference.etc
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Q2. Basics MySQL questions, asked some queries
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Q1. Asked questions based on payment gateway.
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Q1. Salary discussion, explained roles and responsibilities
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Q1. Spring and spring boot related microservice system design
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Q1. System design project related
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Coding test data structures and language related

Q1. Related to resume technology
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