Fiserv Senior Associate Software Engineer Interview Questions and Answers

Q1. What are the best and worst solutions for the coding problem "Longest Substring Without Repeating Characters," including a detailed explanation of each solution along with their time and space complexity?
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Q1. Questions regarding Redis and cache eviction policies, and how would you implement a low-level design for the Least Recently Used (LRU) cache algorithm?
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The DSA round happens with pseudo code

Q1. Question asked from my resume
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Q2. How I implemented everything
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Q1. Why you want to join
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Q2. Where do you see yourself in five years
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Q1. Java Fundamentals
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Q2. System Design
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Q1. Previous experience
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Q2. Spring boot
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Q1. Offer discussion
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Q2. Onboarding process
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Q1. Explain the react lifecycle functions and how they work
Ans. 
React lifecycle functions are methods that are automatically called at specific points in a component's life cycle.
• Mounting: constructor, render, componentDidMount

• Updating: render, componentDidUpdate

• Unmounting: componentWillUnmount
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Q2. Css box model, difference between padding and margin
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Padding is the space inside the border of an element, while margin is the space outside the border.
• Padding is used to create space between the content and the border of an element.

• Margin is used to create space between the border of an element and other elements.

• Padding affects the size of the content area, while margin affects the positioning of the element.

• Example: padding: 10px will create 10 pixels of space inside ...read more
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Q1. What are your salary expectations in CTC and variables?
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Q2. Will you relocate to the location required?
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Data structures and algo. 2 ques were asked in hackerrank

Q1. Questions related to System design
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Q1. Basic question related to Spring and Java
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Java coding questions, basic Java questions.

Q1. Java basics questions.
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Q2. Live coding.
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Q1. Discussion on previous experience and projects.
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Q2. System design question
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Q1. Questions on SQL, Java advanced, personal projects, Java frameworks, UI based questions, Agile methodologies.
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Q2. Interview discussion with the whole team.
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Q1. Benefits discussion.
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Q2. Salary discussion.
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Q1. LLD/Machine coding - Design a social media application with users, posts, comments, likes, etc. There is also an admin who needs to approve post creation and can delete any post they want. Create appropria...read more
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Q1. High-level design - Design a chat-based application like WhatsApp with only user-to-user chat feature (no group chats). Explain and draw out the E2E design by mentioning all the components and design decis...read more
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Q1. Hiring Manager - basic questions like why Razorpay, what are your career goals, what does career growth look like for you, etc.
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