MathCo Interview Questions, Process, and Tips

Q1. Questions related to Css, React
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Questions related to React hooks and all

Q1. Previous company and general discussion
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Q1. General discussion about company
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Q1. Expectation is to lead the data engineering team . So have to be technically strong. It was replacement position . Clearly have been informed Commercial LS experience was not mandatory. All the questions o...read more
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Q1. This was conducted by partner of the organisation. After hearing about the salary he said Commercial LS is mandatory. Need not be technically sound.
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Q1. Describe the Project Architecture End-to-End
Ans. 
The project architecture end-to-end includes the overall design and structure of the project from start to finish.
• The architecture should include the hardware and software components, as well as the communication protocols and data flow.

• It should also consider the scalability, security, and performance of the system.

• Examples of project architecture include client-server, microservices, and event-driven architectures.

• Th...read more
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Q2. Explain how will you implement SCD Type 2.
Ans. 
SCD Type 2 is implemented by creating a new record for each change and maintaining a history of changes.
• Identify the business key and version number for the dimension table.

• Create a new record with a new version number for each change to the dimension data.

• End-date the previous record and start-date the new record to maintain a history of changes.

• Use effective dates to determine which record is active at any given poin...read more
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Q1. Display only those elements which do not occur more than once.
Ans. 
Display non-repeated elements
• Iterate through the elements and count their occurrences

• Display only those elements with occurrence count of 1

• Use a hash table or dictionary to store the counts

• Time complexity: O(n)
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Q2. Difference between a list and a tuple. Explain a use case where you will use a tuple.
Ans. 
List vs Tuple and use case for Tuple
• List is mutable while Tuple is immutable

• List uses square brackets while Tuple uses parentheses

• Tuple is used when data needs to be protected from modification

• Tuple is also used for returning multiple values from a function
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Q1. System design make my trip
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Q1. How to handle failure
Ans. 
Handling failure involves learning from mistakes, staying positive, and adapting to challenges.
• Acknowledge the failure and take responsibility for it

• Analyze the reasons for the failure and learn from it

• Stay positive and maintain a growth mindset

• Adapt your approach and try again with a new strategy

• Seek feedback from others and use it to improve

• Remember that failure is a part of the learning process
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1 hour round of the apti round

Basic SQL queries, and coding ques

Designing a system for advertising and optimize it