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I applied via Recruitment Consulltant and was interviewed in Jul 2023. There were 3 interview rounds.
Scheduled for 15 min but it took 30 min[this is completely alright].
- Self-introduction
- Python codes
- ETL questions
- SQL query[test link didn't work, they said that's fine]
Answered 90% of the questions correctly, but the feedback that I received was completely negative. Interviewers were in a hurry and they were not able to concentrate on the interview. They asked questions so fast and I answered most of them correctly and did coding well.
Two interviewers were supposed to join the interview, one joined 10 min late and another joined 15 min late then I had to introduce myself twice :)
I don't know why the feedback was completely negative.
I applied via Campus Placement and was interviewed before Jun 2023. There were 3 interview rounds.
1 hr medium level DSA questions
DFS (Depth First Search) is a traversal algorithm used in tree data structures to explore as far as possible along each branch before backtracking.
DFS starts at the root node and explores as far as possible along each branch before backtracking.
It uses a stack to keep track of nodes to visit next.
DFS can be implemented recursively or iteratively.
Example: In a binary tree, DFS would visit the left child of a node before
SQL normalisation types include 1NF, 2NF, 3NF, BCNF, and 4NF, each with specific rules for eliminating data redundancy.
1NF (First Normal Form) - Each column in a table must contain atomic values, and there should be no repeating groups.
2NF (Second Normal Form) - Table should be in 1NF and all non-key attributes should be fully functionally dependent on the primary key.
3NF (Third Normal Form) - Table should be in 2NF an...
I am open to opportunities in various locations, depending on the job offer and company culture.
Open to relocation for the right opportunity
Prefer locations with good work-life balance
Interested in cities with strong tech communities
Leetcode questions easy to medium level
To find the 2nd highest salary in SQL or PySpark, use the ORDER BY and LIMIT clauses.
Use ORDER BY clause to sort the salaries in descending order
Use LIMIT 1,1 to get the second highest salary
I want to join Visa because of its reputation as a global leader in payment technology and innovation.
Visa's reputation as a global leader in payment technology and innovation aligns with my career goals.
I am excited about the opportunity to work on cutting-edge data engineering projects at Visa.
I believe that joining Visa will provide me with the chance to collaborate with talented professionals in the industry.
Visa's...
It was fine . medium level difficulty.
I applied via Naukri.com and was interviewed before Mar 2023. There were 4 interview rounds.
Hackerrank test with medium level DSA and SQL questions
Big data optimisation techniques involve strategies to improve the performance and efficiency of processing large volumes of data.
Use of distributed computing frameworks like Hadoop and Spark to process data in parallel
Implementing data compression techniques to reduce storage requirements
Utilizing indexing and partitioning to optimize query performance
Applying data pruning and filtering to reduce unnecessary data proc...
Questions related to Spark internals, Tungsten project, and SQL problem for retail transactions.
Spark's internal mechanism includes components like Spark Core, Spark SQL, Spark Streaming, and MLlib.
Tungsten project in Spark aims to improve the performance of Spark by optimizing memory usage and CPU utilization.
To solve the SQL problem, we can use a query to filter transactions for a particular retail and then use the '...
based on 2 interviews
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