EQL Financial Technologies Interview Questions and Answers

Q1. Basic angular and javascript concepts
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Q2. Life cycle of angular
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Angular has a life cycle consisting of several phases that a component goes through from creation to destruction.
• Angular components go through several life cycle hooks such as ngOnInit, ngOnDestroy, etc.

• ngOnInit is called after the component has been initialized and its data-bound properties have been checked.

• ngOnDestroy is called just before the component is destroyed.

• Other life cycle hooks include ngOnChanges, ngDoCh...read more
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Q1. Advanced angular and javascript concepts
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Q1. Advanced javascript html css typescript
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Q1. Common questions on salary expectations and explain about benefits
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1 hour - Reverse linked list k at a time

Q1. Java 8 stream setup
Ans. 
Java 8 stream setup involves creating a stream from a collection or array and applying operations like filter, map, and reduce.
• Create a stream from a collection using stream() method

• Apply operations like filter, map, and reduce to process elements

• Use terminal operations like collect or forEach to get the final result
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Q2. CAP Theorem explanation wanted
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CAP Theorem states that in a distributed system, it is impossible to simultaneously achieve consistency, availability, and partition tolerance.
• Consistency: All nodes in the system have the same data at the same time.

• Availability: Every request gets a response, even if some nodes are down.

• Partition Tolerance: The system continues to operate despite network partitions.

• Examples: MongoDB prioritizes consistency and partiti...read more
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Q1. Dynamo db working style
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DynamoDB is a fully managed NoSQL database service provided by AWS, designed for high performance and scalability.
• DynamoDB is schema-less, allowing for flexible data models

• It offers high availability and durability through replication and automatic backups

• DynamoDB uses primary keys for data retrieval, with optional secondary indexes for querying

• It supports ACID transactions for consistency and reliability

• DynamoDB is de...read more
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Q2. Function vs method
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A function is a standalone block of code that can be called independently, while a method is a function that is associated with a class or object.
• Functions are standalone blocks of code, while methods are functions associated with classes or objects.

• Functions can be called independently, while methods are called on specific instances of classes or objects.

• Functions are defined outside of classes, while methods are defi...read more
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The first round was a coding test, which was outsourced to an external vendor. I was asked 2 basic DSA questions, and there was discussions around the time and space complexity, and scope of optimizing the solutions. Post that there were a few questions around Spring Boot features and basic system design. The interviewer was professional throughout the interview, and the interview process felt more like a discussion, as compared to the standard interview process.

There was another round of coding - this time conducted by the organization itself. It consisted of a medium level DSA question on stacks. I wrote the code on my personal IDE and executed it there itself. The interviewer discussed about the possible edge cases and how I would deal with them. Post solving the question I was asked about my previous projects.

Q1. Discuss in detail about a scenario where a challenging production issue was handled.
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Q2. What are your responsibilities as a senior / team lead in the current organization?
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Q3. How did you handle conflicts with junior engineers and reporting managers?
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This was the final round where the discussion was largely around system design and HLD. It started off with questions are system design patterns and concepts. Then I was asked to design a booking design, with discussions around concurrency control and transaction management.

Q1. DP on Stock buy n sell
Ans. 
Implement a dynamic programming solution for stock buy and sell problem.
• Use dynamic programming to find the maximum profit by buying and selling stocks.

• Keep track of the minimum stock price seen so far and update the maximum profit accordingly.

• Consider edge cases like no profit or negative profit.

• Example: Input [7, 1, 5, 3, 6, 4], Output 5 (buy at 1, sell at 6)
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Excel based assignment with 5-6 questions, involving index match, vlookup, etc
Can be solved using python as well.

Q1. Discussion on assignnent and its solutions. You will have to explain how you arrived at the solutions. Other than that, basic questions were asked.
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Q1. Final round with involves solving 4-5 questions on excel/python while you are live on the interview. Basic generic questions
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Q1. Prepare excel ll;;
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Q2. Why we use vlookup
Ans. 
VLOOKUP is used in Excel to search for a value in a table and return a corresponding value from another column.
• VLOOKUP stands for 'Vertical Lookup'

• It is commonly used to search for specific data in a large dataset

• Helps in quickly finding and retrieving information from a table

• Can be used to merge data from different tables based on a common identifier
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Q1. Assignment discussion
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Q2. Additional excel and python questions
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Q1. Excel and python basic questions
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