Telecomone Teleservices Omcr Engineer Interview Questions and Answers

Q1. Java8 stream api code
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Q2. Right view of tree Spring boot situation based question
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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. Tell me about your past experience?
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Q1. Technical Interview + Coding
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Q1. Technical Interview
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They will give 3 questions

Q1. There will be technical round after finishing of exam
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Q2. And HR round also will be same time of Technical
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Q1. Questions on ReactJS and code snippets
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It was a machine coding round

Q1. Introduce yourself
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Q1. Talk about your assignment
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