Fidelity Investments Java Developer Interview Questions and Answers

I am a highly motivated individual with a passion for learning and achieving my goals.

• I have a degree in computer science and have worked as a software developer for 3 years.

• I am proficient in multiple programming languages including Java, Python, and C++.

• I enjoy working in a team environment and collaborating with others to solve complex problems.

• In my free time, I enjoy hiking and exploring new places.

I grew up in a small town with my parents and younger sister. We were a close-knit family.

• Grew up in a small town

• Close-knit family

• Parents and younger sister

• Participated in community events

• Enjoyed outdoor activities

I enjoy reading, hiking, and trying new recipes in my free time.

• Reading books on various topics, including fiction, non-fiction, and self-improvement

• Hiking in local parks and nature reserves to explore new trails and enjoy the outdoors

• Experimenting with new recipes and cooking techniques in the kitchen

• Attending cultural events such as concerts, plays, and art exhibits

• Spending time with family and friends, playing board

I would expect a supportive work environment, opportunities for growth and development, and a commitment to excellence.

• Supportive and collaborative team culture

• Clear communication and feedback

• Opportunities for professional development and advancement

• Commitment to high-quality work and customer satisfaction

• Competitive compensation and benefits package

Yes, I have a cousin who lives in Bangalore.

• I have a cousin who has been living in Bangalore for the past 5 years.

• We keep in touch and he has shown me around the city during my visits.

• He works in the IT industry and enjoys the vibrant culture of Bangalore.

Loop in a circular linked list can be found using Floyd's cycle-finding algorithm.

• Initialize two pointers, slow and fast, both pointing to the head of the linked list.

• Move slow pointer by one node and fast pointer by two nodes in each iteration.

• If there is a loop, both pointers will eventually meet at some point.

• If there is no loop, fast pointer will reach the end of the linked list.

• Time complexity of this algorithm is

Pre-fix and post-fix operations can be performed on a string expression using appropriate operators.

• Pre-fix operation involves placing the operator before the operand in the expression.

• Post-fix operation involves placing the operator after the operand in the expression.

• Examples of pre-fix operators include ++, --, !, and ~.

• Examples of post-fix operators include ++ and --.

Data analytics is the process of examining data sets to draw conclusions about the information they contain.

• Data analytics involves collecting, cleaning, and analyzing data to identify patterns and trends.

• It can help businesses make informed decisions by providing insights into customer behavior, market trends, and operational efficiency.

• For example, a retail company can use data analytics to analyze sales data and ide...read more

Strengths include adaptability and teamwork. Weaknesses include public speaking. Non-core background allows for diverse perspective. JPMorgan Chase's reputation and opportunities attract me.

• Strengths: adaptability, teamwork

• Weakness: public speaking

• Non-core background brings diverse perspective

• Attracted to JPMorgan Chase's reputation and opportunities

I would pursue my entrepreneurial dream and start my own company.

• I would conduct market research to validate my idea and identify potential competitors.

• I would create a business plan outlining my goals, strategies, and financial projections.

• I would secure funding through investors or loans.

• I would assemble a team of talented individuals with diverse skills and experiences.

• I would continuously evaluate and adapt my busi

I would listen to both sides, gather more information, and try to find a compromise that satisfies everyone.

• Listen to both sides and understand their perspectives

• Gather more information about both ideas

• Try to find common ground and a compromise that satisfies everyone

• Encourage open communication and respect for each other's ideas

• Consider the potential impact and benefits of each idea

• Involve a neutral third party if nec

Company is a global technology company known for its innovative products and services.

• Founded in 1976 by Steve Jobs, Steve Wozniak, and Ronald Wayne.

• Known for products such as iPhone, iPad, Mac computers, and Apple Watch.

• Offers services like Apple Music, iCloud, and Apple Pay.

• Has a strong focus on design and user experience.

The algorithm reverses a given string.

• Iterate through the string from the last character to the first character.

• Append each character to a new string or an array in reverse order.

• Return the reversed string or array.

As the CEO, I would select the candidate based on their qualifications and skills, regardless of their background or personal characteristics.

• I would focus on the qualifications, skills, and experience of each candidate.

• I would consider their ability to contribute to the company's goals and objectives.

• I would ensure a fair and unbiased selection process.

• I would prioritize diversity and inclusion in the workplace.

• I woul...read more

Code for rand7 using rand5 function

• Use rand5 twice to generate a number in [1,25] with equal probability

• If the number is greater than 21, discard and try again

• Otherwise, return (number mod 7) + 1

LRU cache is implemented using a doubly linked list and a hash map.

• Create a doubly linked list to keep track of the order of elements in the cache.

• Create a hash map to store the key-value pairs of the cache.

• When a new element is added, check if the cache is full. If it is, remove the least recently used element from the linked list and the hash map.

• When an element is accessed, move it to the front of the linked list to...read more

Function to randomly select pivot element in Quick Sort

• Generate a random index within the range of the array

• Return the element at the randomly generated index as the pivot

Yes, the string class can be extended in most programming languages.

• Inheritance can be used to extend the functionality of the string class.

• By creating a new class that inherits from the string class, additional methods and properties can be added.

• Extending the string class allows for customization and adding specific functionality to strings.

• Example: In Python, the string class can be extended by creating a new class

Implicit objects in JSP are predefined objects that are available for use without any declaration or initialization.

• Implicit objects in JSP include request, response, session, application, out, config, pageContext, page, exception, and others.

• These objects provide access to various aspects of the JSP environment and can be used to perform common tasks.

• For example, the request object allows access to HTTP request parame...read more

A hash map is a data structure that uses a hash function to map keys to values.

• Hash map stores key-value pairs

• It uses a hash function to compute an index for each key

• Collisions can occur when two keys hash to the same index

• Hash maps provide fast access to values based on their keys

StringBuffer and StringBuilder are both used to manipulate strings, but StringBuffer is thread-safe while StringBuilder is not.

• StringBuffer is synchronized, making it safe for use in multi-threaded environments.

• StringBuilder is not synchronized, making it faster but not thread-safe.

• StringBuffer is preferred when multiple threads are involved, while StringBuilder is preferred for single-threaded scenarios.

• Both classes p...read more

MVC is a software architectural pattern that separates an application into three main components: Model, View, and Controller.

• Model represents the data and business logic of the application.

• View is responsible for displaying the user interface.

• Controller handles user input, updates the model, and interacts with the view.

• MVC promotes separation of concerns and modularity in software development.

• Example: In a web applica...read more

Annotations used in RESTful web services

• 1. @Path - Specifies the URI path for the resource

• 2. @GET - Specifies that the method handles HTTP GET requests

• 3. @POST - Specifies that the method handles HTTP POST requests

• 4. @PUT - Specifies that the method handles HTTP PUT requests

• 5. @DELETE - Specifies that the method handles HTTP DELETE requests

• 6. @PathParam - Binds the value of a URI template parameter to a method paramete...read more