Fiserv Senior Software Developer Interview Questions and Answers

DSA leetcode on hackerrank

The Two-Sum Problem solve using any programming language(like C#, Python, JavaScrpit ...)

Q1. -About Your project & architecture -Dependency injection -Azure Function & other services -Authentication & Authorization (JWT)
Ans. Dependency injection is a technique for achieving inversion of control between class and their objects
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Q2. What is Angular Interceptor?
Ans. 
Angular Interceptor is a middleware that intercepts HTTP requests and responses.
• It can be used to add headers, modify requests, handle errors, and more.

• Interceptors can be global or specific to a certain request.

• Example use cases include adding authentication tokens to requests or logging responses.

• Interceptors are implemented using the HttpInterceptor interface in Angular.
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Q3. What is Microservice C#?
Ans. 
Microservice C# is a software architecture pattern where an application is built as a collection of small, independent services.
• Each service is responsible for a specific task or feature

• Services communicate with each other through APIs

• Allows for scalability, flexibility, and easier maintenance

• Examples include Netflix, Amazon, and Uber
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Q4. About angular state management?
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Q5. It's the process of managing the state of the user controls.
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Q1. Tell me about yourself.
Ans. 
I am a senior software developer with over 10 years of experience in developing and implementing software solutions.
• I have expertise in multiple programming languages including Java, Python, and C++.

• I have experience in developing web applications using frameworks such as Spring and Django.

• I have worked on projects involving database design and management using SQL and NoSQL databases.

• I have experience in leading devel...read more
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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
Ans. 
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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