FactSet ml engineer Interview Questions, Process, and Tips

1 coding question based on DP for 25 minutes and 30 MCQs on Java , OOPS and code snippet questions also some basic questions based on trees like number of leaf nodes in a complete binary tree with n nodes.

Q1. Write code for finding palindrome of a string
Ans. 
Code to find palindrome of a string
• Iterate through the string from both ends and compare characters

• Use two pointers, one starting from the beginning and one from the end

• If characters at both pointers match, continue checking until they meet in the middle

• If all characters match, the string is a palindrome
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Q2. What is dynamic memory allocation in Java
Ans. 
Dynamic memory allocation in Java refers to the process of allocating memory for objects at runtime.
• Dynamic memory allocation allows for objects to be created and destroyed during program execution.

• The 'new' keyword is used to dynamically allocate memory for objects in Java.

• Dynamic memory allocation helps in managing memory efficiently by allocating memory only when needed.

• Example: int[] arr = new int[5]; dynamically a
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Q3. You are designing an e commerce website which database will you choose and what will you use for authentication given that you can't use JWT or even third party like Google authentication
Ans. 
I would choose a relational database like MySQL and implement a custom authentication system using session management.
• Choose a relational database like MySQL for storing user data, product information, and orders.

• Implement a custom authentication system using session management to securely authenticate users without JWT or third-party services.

• Use encryption techniques to store and validate user passwords securely.

• Util...read more
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Q1. What is HTML and CSS?
Ans. 
HTML and CSS are markup languages used for creating and styling web pages.
• HTML stands for HyperText Markup Language and is used for structuring content on web pages.

• CSS stands for Cascading Style Sheets and is used for styling the appearance of web pages.

• HTML uses tags to define elements like headings, paragraphs, images, and links.

• CSS allows for customization of colors, fonts, layout, and other visual aspects of a web...read more
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Q2. Operating Systems, DBMS, Python
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Q1. L1 technical basic C#
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Q1. L2 technical basic and advance
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Q1. Salary discussion
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Q1. Flatten a tree in right preorder
Ans. 
Flatten a tree in right preorder
• Traverse the tree in right-preorder (root, right, left)

• Use a stack to keep track of nodes

• Pop nodes from stack and add to result array
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Online coding round was conducted .

Q1. Java question, selenium questions, testing
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Q1. Why, how when how much
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Q1. What is policy manager
Ans. 
Policy manager is a software tool used to centrally manage and enforce policies across an organization's systems and applications.
• Policy manager helps define, monitor, and enforce policies related to security, compliance, access control, and other governance aspects.

• It allows administrators to set rules and regulations that govern how data and resources are accessed and used within an organization.

• Policy manager can au...read more
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They asked general aptitude questions ones you can easily practice from indiabix

Be prepared with medium level DSA questions. They touched upon topics like trees, DP, hashing etc.

Q1. They had a total of two technical rounds where one was with the manager you will be working under. The touched upon some puzzles and reasoning questions. The questions will mostly be around you resume so m...read more
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Q1. General HR questions
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It was good but prepared on technical basis

Q1. What is primary key
Ans. 
Primary key is a unique identifier for each record in a database table.
• Primary key ensures each record in a table is unique

• It can be a single column or a combination of columns

• Primary key values cannot be NULL

• Example: In a table of students, student ID can be a primary key
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Q2. What is foreign key
Ans. 
Foreign key is a column or a set of columns in a table that uniquely identifies a row in another table.
• A foreign key establishes a relationship between two tables in a database.

• It ensures referential integrity by enforcing a link between the data in the two tables.

• Foreign key constraints prevent actions that would destroy links between tables, such as deleting a row that is referenced by another table.

• Example: In a dat...read more
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