20 questions · from 2 interviews
Fidelity interview questions
Every question candidates reported from their Fidelity interviews, most frequently asked first. Each links to the write-up it came from, so you can see the round and how it went.
Fidelity coding and DSA questions
- 01
Count Pairs with Sum Divisible by 60
Given an array of integers, count the number of distinct pairs (i, j) such that i < j and (arr[i] + arr[j]) % 60 == 0.
Medium · From Fidelity Technical Intern(On Campus, India)
- 02
Minimum Path Sum
Given a 2D grid of non‑negative integers, find a path from the top‑left corner to the bottom‑right corner that minimizes the sum of all numbers along its path. You may only move either down or right at any point in time.
Medium · From Fidelity Technical Intern(On Campus, India)
- 03
Semaphore Use Cases
What can Semaphores be used for?
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
Fidelity system design questions
- 01
Project Architecture Review
Provide an in-depth architecture review of one of your projects, discussing individual components, how they were scaled, communication between components, overall data flow, and scheduling of jobs and tasks.
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 02
REST API Implementation Technologies
What technologies are used to implement REST APIs?
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 03
HTTP Protocol and Methods
Discuss the HTTP protocol, various request methods, and the differences between GET and POST.
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 04
POST Request Payload Formats
What are typical payload formats used in POST requests?
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 05
Data Quality Issues and Validations
Describe how you deal with data quality issues and perform validations before data even gets into the system.
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 06
Diagnosing Production Problems
How do you instantly know what went wrong when diagnosing production problems, and what can be done other than a thread dump?
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 07
Containerized Production Problems
How do you diagnose production problems in containers when facilities to login to physical servers are absent, or if monitoring tools like Splunk are down or not showing anything?
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 08
JMS and RabbitMQ Experience
Have you used JMS systems, specifically RabbitMQ?
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 09
Kafka Message Processing by Subscribers
How are messages processed by subscribers on Kafka?
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
Fidelity behavioural and HR questions
- 01
Experience with Risk Systems
Describe your experience with Risk Systems.
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
Fidelity other questions
- 01
Container Technologies Experience
What container technologies have you worked with?
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 02
Java JDBC API
Describe the typical flow of the Java JDBC API, the classes involved, and connection pooling.
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 03
Java Automatic Resource Closing
Describe Java facilities for automatic closing of resources.
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 04
Newer Java Features
Describe newer features of the Java language that you have found most useful.
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 05
Relational Databases and SQL Experience
What is your level of experience with relational databases and SQL?
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 06
Spring Boot Experience and Concepts
Describe your experience with Spring Boot and its main concepts.
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
- 07
Newer Java Features (Virtual Threads)
Discuss newer Java language features, specifically if you have used Virtual Threads.
From Fidelity | Director (Individual Contributor) | Jersey City | Feb 2026 [Reject]
Fidelity interview questions FAQ
What questions are asked in Fidelity interviews?
Candidates reported 20 distinct questions across 2 Fidelity interviews. 3 coding and DSA questions, 9 system design questions, 1 behavioural and HR questions, 7 other questions.