Fidelity Investments Interview Questions, Process, and Tips

3 hacker rank questions easy to medium level asked to solve in 60 mins.

Q1. Design patterns java when and what to use
Ans. 
Design patterns in Java are reusable solutions to common software design problems.
• Design patterns should be used when there is a recurring problem in software design.

• Design patterns can improve code readability, maintainability, and scalability.

• Examples of design patterns include Singleton, Factory, Observer, and Decorator.

• It's important to choose the right design pattern for the specific problem at hand.

• Design pattern...read more
Answered by AI
Add your answer
Q2. OOPs concepts deep dive - scenario based questions
Add your answer
Q3. Java 8 streams - how they function internally
Ans. 
Java 8 streams are functional programming constructs that allow for efficient processing of large data sets.
• Streams are composed of a source, intermediate operations, and a terminal operation.

• Intermediate operations include filter, map, and sorted, and are lazily evaluated.

• Terminal operations trigger the evaluation of the stream and include forEach, reduce, and collect.

• Streams can be parallelized for even greater perfo...read more
Answered by AI
Add your answer
Q4. Difference between fixed thread pool and cached thread pool
Ans. 
Fixed thread pool has a fixed number of threads while cached thread pool creates new threads as needed.
• Fixed thread pool is suitable for tasks with a known number of threads

• Cached thread pool is suitable for tasks with unknown number of threads

• Fixed thread pool can cause resource wastage if the number of threads is too high

• Cached thread pool can cause performance issues if the number of threads is too high

• Example: Fixe...read more
Answered by AI
Add your answer

Q1. All spring boot scenario based questions
Add your answer
Q2. How to handle spring app config
Ans. 
Spring app config can be handled using various methods such as XML configuration, Java configuration, and annotation-based configuration.
• XML configuration involves creating an XML file and defining beans and their dependencies.

• Java configuration involves creating a Java class and using annotations to define beans and their dependencies.

• Annotation-based configuration involves using annotations to define beans and their ...read more
Answered by AI
Add your answer
Q3. How to improve application performance
Ans. 
Improving application performance requires optimizing code, database queries, and server resources.
• Identify and fix slow database queries

• Use caching to reduce server load

• Optimize code by reducing unnecessary loops and improving algorithms

• Use a content delivery network (CDN) to reduce server load

• Upgrade server hardware or use cloud-based resources

• Minimize HTTP requests and reduce file sizes for faster page load times
Answered by AI
View 1 more answer
Q4. Microservices communication patterns
Ans. 
Microservices use various communication patterns like synchronous, asynchronous, event-driven, and message-based.
• Synchronous communication involves direct request-response interactions between services.

• Asynchronous communication uses messaging systems like RabbitMQ or Kafka to decouple services.

• Event-driven communication involves services publishing events to a message broker, which other services can subscribe to.

• Mess...read more
Answered by AI
Add your answer
Q5. How to use cache with spring boot
Ans. 
Using cache with Spring Boot
• Add @EnableCaching annotation to main class

• Add @Cacheable annotation to methods that need caching

• Configure cache properties in application.properties file

• Use CacheManager to manage caches

• Example: @Cacheable(value = "users", key = "#id")
Answered by AI
Add your answer
Q6. How to use async in spring boot - advantages
Ans. 
Async in Spring Boot allows non-blocking I/O operations, improving application performance.
• Async enables parallel processing of requests, improving throughput.

• It allows the application to handle more requests with the same resources.

• It reduces the response time for long-running operations.

• Use @Async annotation to mark methods as asynchronous.

• Use CompletableFuture to handle async results.

• Example: @Async public Completab...read more
Answered by AI
Add your answer
Q7. How mvc pattern works in spring mvc
Ans. 
Spring MVC follows the Model-View-Controller (MVC) pattern for building web applications.
• Model represents the data and business logic

• View renders the model data and provides user interface

• Controller handles user requests, updates model and selects view

• Spring MVC provides DispatcherServlet as front controller

• RequestMapping annotation maps URL to controller method

• ModelAndView object returns model data and view name
Answered by AI
Add your answer
Q8. What is filter and why it is required
Ans. 
Filter is a method used to extract specific data from a larger set based on certain criteria.
• Filter is required to extract specific data from a larger set.

• It is used to reduce the amount of data that needs to be processed.

• Filter can be applied to arrays, objects, and even strings.

• Examples include filtering out all even numbers from an array or all emails from a list that contain a specific keyword.
Answered by AI
Add your answer
Q9. How authentication and authorization works - oauth2 way of handling them
Ans. 
OAuth2 is a protocol for authentication and authorization that allows third-party applications to access user data without sharing passwords.
• OAuth2 provides a secure and standardized way for users to grant access to their resources to third-party applications.

• It involves the exchange of tokens between the user, the third-party application, and the resource server.

• Authentication is handled by the authorization server, w...read more
Answered by AI
Add your answer
Q10. Difference between jwt and oauth2, how to secure rest endpoints
Ans. 
JWT is a token format while OAuth2 is a protocol. Both can be used to secure REST endpoints.
• JWT is a self-contained token that contains user information and can be used for authentication and authorization.

• OAuth2 is a protocol that allows third-party applications to access user data without sharing passwords.

• To secure REST endpoints, both JWT and OAuth2 can be used depending on the use case.

• For example, JWT can be used...read more
Answered by AI
Add your answer
Q11. Java 8 problem solving
Add your answer

It was easy round with some basic apti questions

Q1. Basic tech round to check your skills
Add your answer
Q2. Asked towrite a basic program
Add your answer

Q1. Wanting to know the long term goals
Add your answer

Simple easy conditional problem

Q1. Basic sorting algorithms
Add your answer
Q2. Internship experience with tech stack
Ans. 
I have experience with various tech stacks during my internships.
• Worked with Java Spring framework for backend development

• Utilized React.js for front-end development

• Used SQL and NoSQL databases for data storage

• Collaborated with team members to integrate APIs and third-party services
Answered by AI
Add your answer

Quantitative/finance questions, for example what is the present value of $1 million?

Given a scenario write a response email

Q1. Why do you wanna work here?
Add your answer
Q2. If you had $100,000 how would you invested today?
Add your answer
Q3. What is your investment philosophy?
Ans. 
My investment philosophy is to focus on long-term growth and value investing.
• I believe in conducting thorough research before making any investment decisions.

• I prioritize companies with strong fundamentals and a competitive advantage in their industry.

• I aim to build a diversified portfolio to mitigate risk and maximize returns.

• I follow a disciplined approach and avoid emotional decision-making.

• I believe in staying info...read more
Answered by AI
Add your answer
Q4. Describe how to conduct DFC analysis
Ans. 
DFC analysis involves identifying and evaluating the direct and indirect costs associated with a project or decision.
• Identify all direct costs, which are expenses that can be directly attributed to the project or decision.

• Identify all indirect costs, which are expenses that are not directly tied to the project but still impact its overall cost.

• Calculate the total cost by adding up all direct and indirect costs.

• Analyze ...read more
Answered by AI
Add your answer
Q5. Tell me something unique that you would contribute to the company
Add your answer