Opendoors fintech Interview Questions and Answers

2 leetcode medium questions were asked

Q1. 1 feature design end to end
Ans. 
Designing a feature for a social media platform to allow users to create and share photo albums.
• Allow users to create and name albums

• Provide an interface for users to upload and organize photos within albums

• Implement privacy settings to control who can view and contribute to albums

• Include features like tagging, commenting, and liking photos within albums

• Enable users to share albums with others via links or social media
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Q1. Basic hr questions
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Q1. Design Zomato Ordering System
Ans. 
Design a Zomato Ordering System for online food delivery.
• Allow users to browse restaurants and menus

• Implement user authentication and profile management

• Enable users to place orders and make payments online

• Include features like order tracking and ratings/reviews

• Integrate with restaurant partners for order fulfillment
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2 Codes on Hackerrank

Q1. Questions on Tree
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Q2. Questions on Java
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Q1. Hiring Manager Round
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2 Ds questions. About Linked list ans arrays and some aptitude questions.

Q1. Implement Merge Sort algo
Ans. 
Merge Sort is a divide and conquer algorithm that divides the input array into two halves, sorts them recursively, and then merges the sorted halves.
• Divide the array into two halves

• Recursively sort each half

• Merge the sorted halves back together
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Q2. Two sum problem in optimised form
Ans. 
The Two Sum problem involves finding two numbers in an array that add up to a specific target.
• Use a hashmap to store the difference between the target and each element in the array.

• Iterate through the array and check if the current element's complement exists in the hashmap.

• Return the indices of the two numbers that add up to the target.
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Q1. Discussion about the projects in resume
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Q2. NoSql Vs Sql , advantages and disadvantages
Ans. 
NoSQL databases are non-relational, flexible, and scalable, while SQL databases are relational, structured, and consistent.
• NoSQL databases are schema-less, allowing for flexibility in data models.

• SQL databases use structured query language for data manipulation and retrieval.

• NoSQL databases are horizontally scalable, making them suitable for big data applications.

• SQL databases are vertically scalable, which can be more...read more
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2 hackerearth problem solving questions was asked.

Q1. 1. Trees related questions were asked.
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Q2. 2. Some java basic questions were asked
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Q1. Kinda cultural fitment round where manager use to ask what you’ll do in situation like that.
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Q1. Asked about expectations and all
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It was hackerrank test

Q1. Self introduction
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PPT Assignment comparing all APIs

Q1. Domain knowledge
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Q1. Insights about company and candidate
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Q2. If I know Data structures or not?
Ans. 
Yes, I have knowledge of data structures.
• I have experience with common data structures like arrays, linked lists, stacks, queues, trees, and graphs.

• I understand the time and space complexity of different data structures and their operations.

• I have implemented data structures in various programming languages like C++, Java, and Python.

• For example, I have used a hash table to efficiently store and retrieve data in consta
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