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Fidelity Investments Senior Java Developer Interview Questions and Answers
Fidelity Investments Senior Java Developer Interview Experiences
1 interview found
(2 Questions)
- Q1. How is transaction managed in microservices architecture?
- Ans.
Transactions in microservices are managed using distributed transactions or compensating transactions.
Distributed transactions involve multiple microservices coordinating with a transaction manager to ensure data consistency across services.
Compensating transactions involve each microservice having a compensating action to rollback changes if a transaction fails.
Saga pattern is commonly used in microservices to manage ...
- Q2. Questions about java garbage collection
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I was interviewed in Oct 2024.
(4 Questions)
- Q1. Spring cloud gateway
- Q2. JWT Token structure and details
- Q3. Java 11 features
- Q4. Stream related problems
Hackerrank - Hackerrank test including multiple choice and 2 programming questions
(1 Question)
- Q1. Garbage collector internal implementation algorithm
- Ans.
Garbage collector is an automatic memory management system in Java that reclaims memory by deallocating objects no longer in use.
Garbage collector uses different algorithms like Mark-Sweep, Mark-Compact, and Copying to reclaim memory.
Mark-Sweep algorithm marks objects as reachable or unreachable, then sweeps through and deletes the unreachable objects.
Mark-Compact algorithm moves reachable objects to one end of the mem...
Manoj Cheulwar
Selected
I applied via Naukri.com and was interviewed before Feb 2023. There was 1 interview round.
(5 Questions)
- Q1. Java oops concepts , Java memory model , Java, lambda expressions example
- Q2. What are the oops concepts
- Ans.
Object-oriented programming concepts that help in organizing and designing code for reusability and maintainability.
Encapsulation: Bundling data and methods that operate on the data into a single unit (class).
Inheritance: Allowing a class to inherit properties and behavior from another class.
Polymorphism: Ability of objects to take on multiple forms or types.
Abstraction: Hiding the implementation details and showing on
- Q3. What is stream api
- Ans.
Stream API is a feature in Java that allows processing collections of objects in a functional style.
Stream API provides a way to perform operations on collections like filter, map, reduce, etc.
It supports functional programming paradigms like lambda expressions.
Example: List
names = Arrays.asList("Alice", "Bob", "Charlie"); Stream stream = names.stream();
- Q4. What is lambda expressions
- Ans.
Lambda expressions are anonymous functions that allow you to pass behavior as an argument to a method.
Lambda expressions are used to provide a concise way to represent behavior as data.
They are commonly used in functional programming and can be used to implement functional interfaces.
Lambda expressions can be used to iterate through collections using the forEach method.
- Q5. What Java memory model
- Ans.
The Java memory model defines how threads interact through memory when accessing shared data.
Defines the rules for reading and writing to shared variables in a multithreaded environment
Ensures visibility of changes made by one thread to other threads
Specifies the order in which operations are executed and how they are synchronized
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Senior Java Developer Interview Questions & Answers
JPMorgan Chase & Co.
Anonymous
posted on 27 Mar 2024
Selected
I applied via Recruitment Consulltant and was interviewed before Mar 2023. There were 4 interview rounds.
There is coding test consists of Easy / Medium DSA Question on Array/String/Hashing
(1 Question)
- Q1. Java 8 Feature, Immutable, OOPS, Hashmap Internal, Exception Handling, Multthreading lots of Qs asked( Synchonization , Lock ), Collection Framework, Singleton DP.
(1 Question)
- Q1. Project Discussion, Spring Boot Microservice related FAQ, @Transactional, Qualifier, JPA related Question, Design APIs for a given Use Case & Apply Authentication & Authorization, SOLID Design Principles
(1 Question)
- Q1. Explain Latest Project Architechture, asked Cross Question why RDBMS database , why not NoSQL DB used, How OAuth works/ how API Security implemented in your project, Explain any recent Prod Issue you have ...
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Senior Java Developer Interview Questions & Answers
American Express
Aditya Katiyar
posted on 1 Aug 2022
I applied via Referral and was interviewed in Jul 2022. There was 1 interview round.
(1 Question)
- Q1. 1. Eager , Lazy Singleton Design Pattern. 2. Java 8 Stream , Functions (Predicate , Supplier , Consumer ) , Comparator Chaining 3. Designing Pattern -> Count Like / Seen any Post of Instagram , Reduce N/W...
Interview Preparation Tips
Please confirm with HR if they are really interested to hire candidate , In my case i felt they were not really interested to hire .
I applied via Company Website and was interviewed in Nov 2024. There were 2 interview rounds.
(1 Question)
- Q1. Project Architecture
(1 Question)
- Q1. Informatica tech questions
MCQ test consisting of 70 mcqs in 75 minutes from aptitude english and cs fundamentals. If cleared next paper 2 coding qs medium level
(2 Questions)
- Q1. Two sum leetcode problem
- Q2. What problems you faced in your project
- Ans.
I faced challenges with integrating third-party APIs and debugging complex logic.
Difficulty in understanding and implementing third-party APIs
Issues with data synchronization between different systems
Troubleshooting complex logic errors
Managing dependencies and version conflicts
Time constraints affecting problem-solving
Software Developer Interview Questions & Answers
State Street Corporation
Anonymous
posted on 1 Oct 2024
I applied via Campus Placement
DP graphs strings it was good
(2 Questions)
- Q1. Reverse a linkded list
- Ans.
Reverse a linked list by changing the direction of pointers
Start with three pointers: current, previous, and next
Iterate through the list, updating pointers to reverse the direction
Return the new head of the reversed list
- Q2. Print fibonacci series
- Ans.
The Fibonacci series is a sequence of numbers where each number is the sum of the two preceding ones.
Start with two variables initialized to 0 and 1
Loop through desired number of iterations, adding the previous two numbers to get the next number
Print or store each number in the series
Skills evaluated in this interview
(2 Questions)
- Q1. Why do you want to switch
- Ans.
I want to switch to explore new technologies and challenges in a different industry.
Interested in learning new skills and technologies
Seeking new challenges and opportunities for growth
Want to explore different industry perspectives
- Q2. Salry expectations
(2 Questions)
- Q1. Question on oop concepts
- Q2. Coding questions
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