Fiserv Software Professional Interview Questions and Answers

Q1. Basics of angular, ts,js
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Q1. Programming questions
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Q1. Family backgroud
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Q1. Sort the list, after many queries
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Q2. LRU cache with multi level caching
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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
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Q1. Basic oops, .net, c# coding, sql questions
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Q1. More coding and details on project
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Q1. More on projects and system design and troubleshooting approach
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Q1. Salary discussion
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Q1. More technical + managerial round even after HR round
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One medium and one standard DP question

Q1. Medium level question based on binary search
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Q1. Design google-pay
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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
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Q2. HLD of recursive
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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.
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Q1. Puzzles available on GFG
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Q2. Behavioral question
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Q1. LLD HLD HM rounds
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Q1. Array basics, java basics oops and all
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1 hour test conducted by the company

Data structure and all