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Backend Software Engineer Interview Questions

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9,115 backend software engineer interview questions shared by candidates

1. What is difference between Array and LinkedList. Tell me 2 cases where i can use array and linked list and How it will benefit ? 2. What is HTTP and What is technical difference between GET and POST method ? 3. Find Kth Largest Element of a given Array. What is time complexity of merge sort and how does it come, derive it ? 4. What is the TC of PriorityQueue(insert, get, delete) and How does it come. How does its internal work ? 5. What you can modify MinPriorityQueuq into MaxPriorityQueue. What is comparator and What is lambda function and what does lambda function signify and benefits ? 6. Given 2 Table : Table A = [ID, Name] Table B = [RefId, Value] Now, RefId is the Id of Table A. Now I have a RefId, I have given RefID and I want Name from Table A. Then Write the Syntax for this query. 7. What is PolyMorphism. Tell me about Overloading and overriding and where can i use it. And how will it benefits us ? 8. What is SOLID Principal and explain each.
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Backend Developer

Interviewed at ninjacart

3.5★
Mar 21, 2024

1. What is difference between Array and LinkedList. Tell me 2 cases where i can use array and linked list and How it will benefit ? 2. What is HTTP and What is technical difference between GET and POST method ? 3. Find Kth Largest Element of a given Array. What is time complexity of merge sort and how does it come, derive it ? 4. What is the TC of PriorityQueue(insert, get, delete) and How does it come. How does its internal work ? 5. What you can modify MinPriorityQueuq into MaxPriorityQueue. What is comparator and What is lambda function and what does lambda function signify and benefits ? 6. Given 2 Table : Table A = [ID, Name] Table B = [RefId, Value] Now, RefId is the Id of Table A. Now I have a RefId, I have given RefID and I want Name from Table A. Then Write the Syntax for this query. 7. What is PolyMorphism. Tell me about Overloading and overriding and where can i use it. And how will it benefits us ? 8. What is SOLID Principal and explain each.

The interview was conversational where we discussed my prior experience, how I learn new technologies and how I go about testing and reviewing software. The hiring manager talked about what they do, the challenges they face, and what this specific role's responsibilities are.
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Senior Software Engineer - Backend Platform

Interviewed at Samsung Electronics America

2.9★
May 26, 2022

The interview was conversational where we discussed my prior experience, how I learn new technologies and how I go about testing and reviewing software. The hiring manager talked about what they do, the challenges they face, and what this specific role's responsibilities are.

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