Fidelity Investments Interview Questions, Process, and Tips

Array and string coding

Q1. Questions were asked on projects
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Q2. Question on cpp, oops
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Q1. Why do you want to join Fidelity
Ans. 
I want to join Fidelity because of its reputation for innovation and commitment to employee development.
• Fidelity is known for its cutting-edge technology and forward-thinking approach

• I am impressed by Fidelity's focus on continuous learning and career growth opportunities

• I believe Fidelity's values align with my own, particularly in terms of integrity and excellence
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Q2. Give an example when you faced a conflict
Ans. 
During a group project, I had a conflict with a team member over the direction of our presentation.
• Team member wanted to focus on one aspect while I wanted to highlight another

• We discussed our viewpoints and compromised on a balanced approach

• Resulted in a successful presentation that covered all important aspects
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Q1. Find the character with the maximum frequency
Ans. 
Iterate through each character in the array of strings and keep track of the frequency of each character. Return the character with the maximum frequency.
• Create a dictionary to store the frequency of each character

• Iterate through each string in the array and then through each character in the string

• Update the frequency count of each character in the dictionary

• Return the character with the maximum frequency
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Q2. Valid parenthesis
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Q1. Have you used Junit? What is the difference between SQl and NoSQl Databases? have you worked with Kafka? Kafka based questions. explain dockerization/ containerization. which java8 feature did you work wit...read more
Ans. 
Yes, I have experience with Junit, SQL and NoSQL databases, Kafka, Dockerization, Java 8 features, stream() operations, and shell scripting in Unix.
• I have used Junit for unit testing in Java projects.

• SQL databases are relational databases that use structured query language for data manipulation, while NoSQL databases are non-relational databases that provide flexible schema design and horizontal scalability.

• I have work...read more
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Q1. What is the most complex sql query you have written till date. Why did you use nested query to achieve your goal? explain the query. which join did you use in the query. have you implemented hashset? how w...read more
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The most complex SQL query involved nested queries for data manipulation. Used inner join. Implemented hashset and avoided trees due to their drawbacks.
• Nested SQL query used for complex data manipulation

• Inner join used for combining data from multiple tables

• Implemented hashset for efficient data storage and retrieval

• Avoided trees due to their drawbacks such as unbalanced structure and slower traversal times
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Q2. Find and replace words in a file using shell scripting. add an index in the beginning of each line in a file using shell scripting. what is multithreading? difference between single threaded and multithrea...read more
Ans. 
Shell scripting for find and replace, adding index to lines, multithreading, hashmap vs hashtable, stack vs queue
• Use sed command for find and replace in shell scripting

• Use awk command to add an index at the beginning of each line in a file

• Multithreading is the ability of a CPU to execute multiple threads concurrently

• Single threaded means only one thread is executed at a time, while multithreaded allows multiple threads...read more
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Q1. Behavioral questions- tell me about yourself. do you have any questions for us?
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Q1. Python Tuples and Arrays
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Q2. Kubernetes Persistent Volumes
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Q1. What was your last project
Ans. 
My last project involved implementing a monitoring system for a large-scale e-commerce platform.
• Designed and implemented a custom monitoring solution using Prometheus and Grafana

• Integrated alerting mechanisms to notify on-call engineers of critical issues

• Optimized monitoring queries and dashboards for performance and usability
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Q2. What did you do
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Q1. Culture fit questions
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Q1. Tell me a time when you failed?
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Q2. Tell me a time when you resolved conflict.
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General aptitude logical , reasoning

DSA Algorithm, SQL queries and some scenario based questions.