Fidelity Investments Software Development Engineer Interview Questions and Answers

Q1. Introduce yourself
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Q2. What has been your experience with framework design and implementation?
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Q3. What is the tech and languages you are comfortable with? Rate yourself on each.
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Q4. What is your experience with finance?
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Q5. What is TDD and BDD? What are the differences and which one do you prefer?
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Q1. Write a program to find the frequency of word in a sentence
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Q2. Write a program to check if the sum of digits of.the given number is a prime number
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Q3. Write an SQL query to get the second highest salary in the table
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Q4. What is the difference between abstract class and interface? Give a use case for both.
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Q5. Explain static and give it's use case.
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Q6. Where are objects stored in memory?
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Medium leetcode question on array list

Q1. Core java and collections, exceptions and threading
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Q2. Core java collections
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Q3. Multi threading
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Q4. Executor framework
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Q1. Threading related questions
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There were three coding questions.

Q1. Could you provide a thorough explanation of the project?
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Q2. OOps Concepts and question from the technical subjects
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Q3. Why Spring Boot
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Q4. JWT Authentication
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Q5. Docker and Kubernetes
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Test was for Web Development - React
75min test
3 Questions
1 Coding Question
2 Scenario based questions

Q1. React Optimization techniques
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Q2. React Advantages
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Q1. How to debug in production environment?
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Q1. Challenges faced during work and how you overcome?
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Q1. Why you choose Wells fargo over other offers?
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Q1. Java difference between Finally, Finalize
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Finally is a block of code that always executes, while Finalize is a method used for cleanup before an object is garbage collected.
• Finally block is used in exception handling to ensure certain code is always executed, regardless of whether an exception is thrown or not.

• Finalize method is called by the garbage collector before an object is reclaimed.

• Finally block is used in try-catch-finally blocks, while Finalize metho...read more
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Q2. Programming question - Find second largest string from a given sentence
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Find the second largest string from a given sentence
• Split the sentence into an array of strings

• Sort the array based on string length

• Return the second last element in the sorted array
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Q3. Difference between AWS cloud front and cloud formation
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AWS CloudFront is a content delivery network (CDN) service, while AWS CloudFormation is an infrastructure as code service.
• CloudFront is used to deliver content to end users with low latency and high data transfer speeds.

• CloudFormation is used to automate the deployment of infrastructure resources in a repeatable and predictable manner.

• CloudFront is a CDN service that caches content at edge locations to reduce latency, ...read more
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Q4. How to improve performance in react js ?
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To improve performance in React JS, optimize rendering, minimize re-renders, use virtualization, lazy loading, code splitting, and memoization.
• Optimize rendering by using shouldComponentUpdate or React.memo for functional components

• Minimize re-renders by using PureComponent or memoization techniques like useMemo or useCallback

• Use virtualization for long lists or tables to render only the visible items

• Implement lazy loa...read more
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Q1. They grind u in javascript,typescript
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Q2. Html css, angular
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Q3. Deep preparation needed
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Asked questions on arrays

Q1. Questions on databases
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Q2. Questions on data structures
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Q3. Questions on sql
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Q4. Questions on projects
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Q5. Questions on java
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Q1. Project Architecture
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Q1. Informatica tech questions
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