Fiserv Senior ETL Developer Interview Questions and Answers

Q1. Sort the list, after many queries
Add your answer
Q2. LRU cache with multi level caching
Ans. 
LRU cache with multi level caching involves implementing a cache with multiple levels of storage, where the least recently used items are evicted first.
• Implement a two-level cache system with a primary cache (e.g. in-memory) and a secondary cache (e.g. disk-based).

• Use a data structure like a doubly linked list and a hash map to efficiently manage the cache and track the least recently used items.

• When an item is accesse...read more
Answered by AI
Add your answer

Q1. Basic oops, .net, c# coding, sql questions
Add your answer

Q1. More coding and details on project
Add your answer

Q1. More on projects and system design and troubleshooting approach
Add your answer

Q1. Salary discussion
Add your answer

Q1. More technical + managerial round even after HR round
Add your answer

One medium and one standard DP question

Q1. Medium level question based on binary search
Add your answer

Q1. Design google-pay
Ans. 
Design Google Pay - a digital wallet platform for online payments and transactions.
• Allow users to securely store payment information such as credit/debit cards, bank accounts, and loyalty cards.

• Enable users to make payments in stores, online, and within apps using their stored payment methods.

• Implement security features like biometric authentication, tokenization, and encryption to protect user data.

• Provide features fo...read more
Answered by AI
Add your answer
Q2. HLD of recursive
Ans. 
High Level Design (HLD) of recursive functions in software development.
• Recursive functions call themselves to solve smaller instances of the same problem.

• HLD of recursive functions involves defining the base case, recursive case, and termination condition.

• Example: HLD of a recursive function to calculate factorial of a number involves defining base case as factorial(0) = 1.
Answered by AI
Add your answer

Q1. Puzzles available on GFG
Add your answer
Q2. Behavioral question
Add your answer

Q1. LLD HLD HM rounds
Add your answer

Q1. Array basics, java basics oops and all
Add your answer

1 hour test conducted by the company

Data structure and all

Q1. Tell me about yourself and about previous organisation.
Ans. 
I am a software developer with 5 years of experience. I previously worked at XYZ Company as a full-stack developer.
• 5 years of experience in software development

• Previous role as a full-stack developer at XYZ Company

• Proficient in programming languages such as Java, Python, and JavaScript
Answered by AI
Add your answer
Q2. Basic technical questions about the framework and the specific language.
Add your answer

Q1. More technical questions
Add your answer

SQL and coding questions

Q1. Salary negotiation
Add your answer