4 Micron Technology Senior Data Engineer Interview Questions & Answers | Complete Prep Guide 2025

Micron Technology Senior Data Engineer Interview Experiences

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Senior Data Engineer Interview Questions & Answers

Priyanka Maganti

posted on 19 Jun 2024

Interview experience

Excellent

Difficulty level

Easy

Process Duration

2-4 weeks

Result

No response

I applied via Naukri.com and was interviewed in May 2024. There was 1 interview round.

Round 1 - Technical

(4 Questions)

Q1. Write a spark program to find the word with maximum length in a given string

Ans.

Use Spark program to find word with maximum length in a given string

Split the string into words using space as delimiter
Map each word to its length
Find the word with maximum length using reduce operation

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Q2. Write an sql query to change rows into columns and vice versa

Ans.

Use SQL pivot function to change rows into columns and vice versa

Use the PIVOT function in SQL to transform rows into columns
Use the UNPIVOT function in SQL to transform columns into rows
Example: SELECT * FROM table_name PIVOT (SUM(value) FOR column_name IN (value1, value2, value3))
Example: SELECT * FROM table_name UNPIVOT (value FOR column_name IN (value1, value2, value3))

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Q3. Write an sql query to fetch duplicate rows in a table

Ans.

SQL query to fetch duplicate rows in a table

Use GROUP BY and HAVING clause to identify duplicate rows
Select columns to check for duplicates
Example: SELECT column1, column2, COUNT(*) FROM table_name GROUP BY column1, column2 HAVING COUNT(*) > 1;

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Q4. Diff between repartition and colaesce, clustering and partitioning in bq

Ans.

Repartition increases or decreases the number of partitions in a DataFrame, while coalesce only decreases the number of partitions. Clustering is used for organizing data within a partition, while partitioning is dividing data into logical units.

Repartition increases or decreases the number of partitions in a DataFrame, which can be useful for parallelism and performance optimization.
Coalesce only decreases the number ...

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Interview Preparation Tips

Topics to prepare for Micron Technology Senior Data Engineer interview:

Spark
SQL
Python
Google Cloud

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How long does it take to hear back from HR after interview? It's a drive as they're setting up new office. It's been 6 business days (10 days) since I gave interview.

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Software Engineer Interview Questions & Answers

Qualcomm

Anonymous

posted on 18 Sep 2017

I was interviewed in Sep 2017.

Interview Questionnaire

2 Questions

Q1. Find the sum of two numbers without using any mathematical operarors.

Ans.

Use bitwise operations to find the sum of two numbers without using mathematical operators.

Use bitwise XOR to find the sum of two numbers without carrying.
Use bitwise AND and left shift to find the carry.
Repeat the process until there is no carry left.

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Q2. Delete a node from linked list when we are given a reference to the node. But the head pointer is not given.

Ans.

To delete a node from a linked list when only given a reference to the node, we can copy the data of the next node to the given node and delete the next node.

Copy the data of the next node to the given node
Update the next pointer of the given node to skip the next node
Delete the next node

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