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Fidelity Investments Software Development Engineer Interview Questions and Answers

Updated 18 Jul 2024

Interview questions from similar companies

Interview experience
3
Average
Difficulty level
Moderate
Process Duration
2-4 weeks
Result
Selected Selected

I applied via Walk-in and was interviewed before Mar 2023. There was 1 interview round.

Round 1 - Technical 

(1 Question)

  • Q1. How would you design tiny url implementation?
  • Ans. 

    Design a system to create and manage short URLs for long URLs.

    • Use a database to store mappings of short URLs to long URLs.

    • Generate a unique short URL for each long URL using a hashing algorithm.

    • Implement a redirect service to redirect users from short URLs to long URLs.

    • Consider adding expiration dates for short URLs to manage storage.

    • Implement analytics to track usage of short URLs.

  • Answered by AI

Interview Preparation Tips

Interview preparation tips for other job seekers - Steps :-
1) Functional requirement analysis
2) Non-Functional requirement analysis
3) Capacity estimation
4) Low level system design
5) High level system design

Skills evaluated in this interview

Interview experience
5
Excellent
Difficulty level
Easy
Process Duration
Less than 2 weeks
Result
Selected Selected

I applied via Walk-in and was interviewed before Apr 2023. There were 2 interview rounds.

Round 1 - Coding Test 

Hashmap and string manipulation - optimization

Round 2 - HR 

(1 Question)

  • Q1. Stengths/weaknesses
Interview experience
5
Excellent
Difficulty level
-
Process Duration
-
Result
-
Round 1 - HR 

(1 Question)

  • Q1. Tell me about yourself
  • Ans. 

    I am a passionate software engineer with experience in developing web applications using various technologies.

    • Experienced in developing web applications using HTML, CSS, JavaScript, and frameworks like React and Angular

    • Proficient in backend development with Node.js and databases like MySQL and MongoDB

    • Familiar with version control systems like Git and deployment tools like Docker

  • Answered by AI
Round 2 - HR 

(1 Question)

  • Q1. Tell me about yourself
  • Ans. 

    I am a software engineer with 5 years of experience in developing web applications using Java, Spring Boot, and Angular.

    • 5 years of experience in software development

    • Proficient in Java, Spring Boot, and Angular

    • Strong problem-solving skills

    • Experience working in Agile development environment

    • Passionate about learning new technologies

  • Answered by AI

Interview Preparation Tips

Round: Technical Interview
Experience: Technical on paper test questions:(dis was only for 12 among d 26 shortlisted ppl after apti...others directly had interviews)
5 wer selected in this test who wer nw sent for interviews
TECHNICAL INTERVIEW: (pls list the questions asked in all the rounds)
26 shortlisted after apti (14 directly for interviews & 12 had one more technical on paper test...mentioned above)
der wer min 2 technical rounds for each of them...max were 5

- You are given course dependencies
A->B,C
B->D
C->A
D->nothing
The above dependencies mean...if you want to take course A...you should take courses B and C first....To take B,Course D must be taken first....D is an independent course and can be taken without any prior requirements.
Now you are told these dependencies.Come up with an appropriate data structure to represent these dependencies.Then write a code that finds out all the courses that the student can take up...in this case the student can first take course D because its independent.Now that course D has been taken he can next take up B as it depends on B alone...But the courses A and C can never be taken because they depend on each other...So here all the courses that can be taken are B and D.
After i wrote the code....he asked for all possible test cases
-Given an array of length N....It can be filled with nos. only from 1 to N....find which nos are repeated in the array
-Given pointers to two nodes in a binary tree....find their least common ancestor...each node has pointer to only the parent node...not the left and right child..
-In a binary tree(Not necessarily a BST)...suppose the weight of any node is defined as the product of the key value of the node and the level of the node(Root at level 1)...find the node with maximum weight in the binary tree
-A sorted array of size n is right circularly rotated k times and this rotated array is given to you as input...Find out the value of k in log n time .
-There are some processes running at time T....and there are processes running at time T+30.
You have to find out
1)Which processes died at time T+30,which were alive at time T
2)Which are the new processes at time T+30,which were not there at time T
3)Which are the processes that were there at time T and are still running at time T+30
What data structure will you use to represent the process lists and write code to find out the answers to the 3 questions above
-Given a binary search tree...and a target sum...starting at the root...which all paths add up to the target sum?...if there are multiple paths....return the path with least no. of nodes.


College Name: Veermata Jijabai Technological Institute, Mumbai [ VJTI ]

I was interviewed before May 2016.

Interview Preparation Tips

Round: Written Test
Experience: I attended interview at hyderabad location for java Sr.Software Engineer.
1Q) Find out given string palindrome or not.
Ex: madam
2Q) Find first and last index searching number in a array.
Ex: [1,2,3,3,3,3,4,5]
Output : 2,5
3Q) Arrange Strings in alphabetical order.

Tips: Prepare numeric and string related algorithms

Interview Questionnaire 

11 Questions

  • Q1. Print all nodes at a distance k from a given node in binary tree?
  • Q2. RandN function : which generates random number in [1,2,3..N] with equal probability. Given rand5, write a code for rand7 using rand5
  • Ans. 

    Code for rand7 using rand5 function

    • Use rand5 twice to generate a number in [1,25] with equal probability

    • If the number is greater than 21, discard and try again

    • Otherwise, return (number mod 7) + 1

  • Answered by AI
  • Q3. Puzzle: Using all(8,8,3,3) and only operators(*,/,-,+), make 24
  • Q4. How do you implement LRU cache?
  • Ans. 

    LRU cache is implemented using a doubly linked list and a hash map.

    • Create a doubly linked list to keep track of the order of elements in the cache.

    • Create a hash map to store the key-value pairs of the cache.

    • When a new element is added, check if the cache is full. If it is, remove the least recently used element from the linked list and the hash map.

    • When an element is accessed, move it to the front of the linked list to...

  • Answered by AI
  • Q5. Your current project in Company? A lot of questions from CV? Discussion went on for about 15 minutes?
  • Q6. Then had a lot of questions around java script and java. About different design patterns and web services
  • Q7. A lot of questions around java, collections frameworks, multi threading and so on. (This took a good 25-30 minutes )
  • Q8. A strategy question. It would be asked depending on which team you are being interviewed for.Mine was some apple seller problem. Here knowledge of real world scenario helps. Advice is to observe things aro...
  • Q9. Write down function to select pivot element randomly in Quick Sort
  • Ans. 

    Function to randomly select pivot element in Quick Sort

    • Generate a random index within the range of the array

    • Return the element at the randomly generated index as the pivot

  • Answered by AI
  • Q10. He asked me what is a data structure and why do we use one. Explained him. He asked some real life example of stack and queue. All I could gave him was programming examples but when he insisted on real li...
  • Q11. As we were talking very much on each question. He felt like talking more and from tech he went around for some biggest learning from a mistake/biggest achievement of life kind of questions. There were oth...

Interview Preparation Tips

General Tips: I recently interviewed with Goldman Sachs, and had 4 rounds of interview with them at their campus in Bangalore.
Skills: Algorithm, Data structure
College Name: na

Skills evaluated in this interview

I was interviewed in May 2017.

Interview Questionnaire 

6 Questions

  • Q1. Can string class be extended
  • Ans. 

    Yes, the string class can be extended in most programming languages.

    • Inheritance can be used to extend the functionality of the string class.

    • By creating a new class that inherits from the string class, additional methods and properties can be added.

    • Extending the string class allows for customization and adding specific functionality to strings.

    • Example: In Python, the string class can be extended by creating a new class

  • Answered by AI
  • Q2. What are the implecit object in JSP
  • Ans. 

    Implicit objects in JSP are predefined objects that are available for use without any declaration or initialization.

    • Implicit objects in JSP include request, response, session, application, out, config, pageContext, page, exception, and others.

    • These objects provide access to various aspects of the JSP environment and can be used to perform common tasks.

    • For example, the request object allows access to HTTP request parame...

  • Answered by AI
  • Q3. How does hash map works
  • Ans. 

    A hash map is a data structure that uses a hash function to map keys to values.

    • Hash map stores key-value pairs

    • It uses a hash function to compute an index for each key

    • Collisions can occur when two keys hash to the same index

    • Hash maps provide fast access to values based on their keys

  • Answered by AI
  • Q4. Difference between string buffer and string builder
  • Ans. 

    StringBuffer and StringBuilder are both used to manipulate strings, but StringBuffer is thread-safe while StringBuilder is not.

    • StringBuffer is synchronized, making it safe for use in multi-threaded environments.

    • StringBuilder is not synchronized, making it faster but not thread-safe.

    • StringBuffer is preferred when multiple threads are involved, while StringBuilder is preferred for single-threaded scenarios.

    • Both classes p...

  • Answered by AI
  • Q5. What is MVC
  • Ans. 

    MVC is a software architectural pattern that separates an application into three main components: Model, View, and Controller.

    • Model represents the data and business logic of the application.

    • View is responsible for displaying the user interface.

    • Controller handles user input, updates the model, and interacts with the view.

    • MVC promotes separation of concerns and modularity in software development.

    • Example: In a web applica...

  • Answered by AI
  • Q6. What are the annotation used in RESTFULL web services
  • Ans. 

    Annotations used in RESTful web services

    • 1. @Path - Specifies the URI path for the resource

    • 2. @GET - Specifies that the method handles HTTP GET requests

    • 3. @POST - Specifies that the method handles HTTP POST requests

    • 4. @PUT - Specifies that the method handles HTTP PUT requests

    • 5. @DELETE - Specifies that the method handles HTTP DELETE requests

    • 6. @PathParam - Binds the value of a URI template parameter to a method paramete...

  • Answered by AI

Interview Preparation Tips

Skills: Java Application Development

Skills evaluated in this interview

I was interviewed before Mar 2021.

Round 1 - Coding Test 

(3 Questions)

Round duration - 90 minutes
Round difficulty - Medium

There were 33 questions in total. The objective questions were simple.

  • Q1. 

    Sort Big List Dates Problem Statement

    Mary is an enthusiastic party-goer who struggles with remembering event dates. Help Mary by sorting a given list of event dates in an ascending order.

    Example:

    Inpu...
  • Ans. 

    Sort a list of event dates in ascending order based on year, month, and day.

    • Sort the list of dates based on year, then month, and finally day.

    • Use a sorting algorithm to rearrange the dates in ascending order.

    • Ensure the constraints are met for each date in the list.

  • Answered by AI
  • Q2. 

    Pair Sum Problem Statement

    You are given an integer array 'ARR' of size 'N' and an integer 'S'. Your task is to find and return a list of all pairs of elements where each sum of a pair equals 'S'.

    Note:
    ...
  • Ans. 

    Given an array and a target sum, find all pairs of elements that add up to the target sum.

    • Iterate through the array and for each element, check if the complement (target sum - current element) exists in a hash set.

    • If the complement exists, add the pair to the result list.

    • Sort the pairs based on the first element and then the second element.

    • Handle edge cases like duplicate elements and pairs with the same values.

    • Example...

  • Answered by AI
  • Q3. 

    Maximum Sum Problem Statement

    Given an integer N, your task is to recursively break it into three integer parts: N / 2, N / 3, and N / 4. You need to compute the maximum sum possible by dividing the numbe...

  • Ans. 

    Given an integer N, recursively break it into three parts and find the maximum sum possible.

    • Recursively divide N into N/2, N/3, and N/4 to find the maximum sum

    • Compare the sum obtained by dividing N with the sum of N itself

    • Return the maximum sum for each test case

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAMorgan Stanley interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 4 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more

Final outcome of the interviewRejected

Skills evaluated in this interview

I was interviewed before Mar 2021.

Round 1 - Face to Face 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Medium

Technical Interview round with questions based on DSA.

  • Q1. 

    Duplicate Integer in Array

    Given an array ARR of size N, containing each number between 1 and N-1 at least once, identify the single integer that appears twice.

    Input:

    The first line contains an integer...
  • Ans. 

    Identify the duplicate integer in an array containing numbers between 1 and N-1.

    • Iterate through the array and keep track of the frequency of each element using a hashmap.

    • Return the element with a frequency greater than 1 as the duplicate integer.

    • Ensure the constraints are met and a duplicate number is guaranteed to be present.

  • Answered by AI
  • Q2. 

    Sum Root to Leaf Numbers

    You are given an arbitrary binary tree consisting of N nodes, each associated with an integer value from 1 to 9. Each root-to-leaf path can be considered a number formed by concat...

  • Ans. 

    Calculate the total sum of all root to leaf paths in a binary tree formed by concatenating node values.

    • Traverse the binary tree from root to leaf nodes, keeping track of the current path sum

    • Add the current node value to the path sum and multiply by 10 for each level

    • When reaching a leaf node, add the final path sum to the total sum

    • Return the total sum modulo (10^9 + 7)

  • Answered by AI
  • Q3. 

    Topological Sort Problem Statement

    You are given a directed acyclic graph (DAG). Your task is to perform topological sorting of the graph and return any valid ordering.

    Explanation:

    A directed acyclic g...

  • Ans. 

    Implement a function to perform topological sorting on a directed acyclic graph (DAG) and return any valid ordering.

    • Create a graph data structure to represent the DAG

    • Use depth-first search (DFS) to perform topological sorting

    • Maintain a visited array to keep track of visited nodes

    • Return the ordering of nodes after DFS traversal

  • Answered by AI
Round 2 - Face to Face 

(3 Questions)

Round duration - 60 minutes
Round difficulty - Easy

Technical interview round with questions based on DSA.

  • Q1. 

    LCA of Binary Tree Problem Statement

    You are given a binary tree consisting of distinct integers and two nodes, X and Y. Your task is to find and return the Lowest Common Ancestor (LCA) of these two nodes...

  • Ans. 

    Find the Lowest Common Ancestor (LCA) of two nodes in a binary tree.

    • Traverse the binary tree to find the paths from the root to nodes X and Y.

    • Compare the paths to find the last common node, which is the LCA.

    • Handle cases where one node is an ancestor of the other.

    • Consider edge cases like when X or Y is the root node.

    • Implement a recursive or iterative solution to find the LCA efficiently.

  • Answered by AI
  • Q2. 

    Rotated Array Minimum Finder

    You are provided with a sorted array that has undergone 'K' rotations (the exact value of 'K' is unknown). A rotation involves shifting each element of the array to the right,...

  • Ans. 

    Implement a function to find the minimum number in a rotated sorted array efficiently.

    • Use binary search to find the minimum element in the rotated array.

    • Compare the mid element with the start and end elements to determine which half of the array to search next.

    • Continue the binary search until the minimum element is found.

  • Answered by AI
  • Q3. 

    Maximum Binary Tree Construction Problem

    Given an array TREE of 'N' unique integers, construct a maximum binary tree using the following rules:

    1. The root of this tree is the maximum number in TREE.
    2. T...
  • Ans. 

    Construct a maximum binary tree from an array of unique integers following specific rules.

    • Find the maximum number in the array to set as the root of the tree.

    • Recursively construct the left subtree with elements before the maximum number.

    • Recursively construct the right subtree with elements after the maximum number.

  • Answered by AI

Interview Preparation Tips

Eligibility criteriaAbove 7 CGPAMorgan Stanley interview preparation:Topics to prepare for the interview - Data Structures, Algorithms, System Design, Aptitude, OOPSTime required to prepare for the interview - 6 monthsInterview preparation tips for other job seekers

Tip 1 : Must do Previously asked Interview as well as Online Test Questions.
Tip 2 : Go through all the previous interview experiences from Codestudio and Leetcode.
Tip 3 : Do at-least 2 good projects and you must know every bit of them.

Application resume tips for other job seekers

Tip 1 : Have at-least 2 good projects explained in short with all important points covered.
Tip 2 : Every skill must be mentioned.
Tip 3 : Focus on skills, projects and experiences more.

Final outcome of the interviewRejected

Skills evaluated in this interview

Fidelity Investments Interview FAQs

How many rounds are there in Fidelity Investments Software Development Engineer interview?
Fidelity Investments interview process usually has 1 rounds. The most common rounds in the Fidelity Investments interview process are Technical.
What are the top questions asked in Fidelity Investments Software Development Engineer interview?

Some of the top questions asked at the Fidelity Investments Software Development Engineer interview -

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Fidelity Investments Software Development Engineer Interview Process

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Fidelity Investments Software Development Engineer Salary
based on 8 salaries
₹9 L/yr - ₹16.4 L/yr
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