Deloitte
Multinational professional services network with offices in over 150 countries.
4 Rounds
~21 Days
Medium
The Interview Loop
Recruiter Screen (30 min)
Standard fit check, behavioral questions, and resume overview.
Technical Loop (3-4 Rounds)
Deep dive into domain knowledge, coding, and system design.
Interview Question Bank
Data Engineer
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Technical
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hard
In a recent client project, you had to process a massive dataset using PySpark, but one of the tasks took significantly longer than the others. How do you identify and resolve data skew in Spark?
#PySpark
#Performance Tuning
#Data Skew
Data Engineer
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Technical
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medium
What is a Broadcast Hash Join in Spark? When would you use it, and what are its limitations?
#Spark SQL
#Joins
#Optimization
Data Engineer
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Technical
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hard
You are running a PySpark job that keeps failing with an 'OutOfMemoryError: Java heap space'. What steps do you take to debug and fix this?
#PySpark
#Troubleshooting
#Memory Management
Data Engineer
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Technical
•
medium
What are the key features of Delta Lake, and how does it solve the limitations of traditional data lakes?
#Delta Lake
#ACID Transactions
#Databricks
Data Engineer
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Technical
•
medium
How do you handle schema evolution in a data lake environment when upstream source systems add, remove, or change the data types of columns?
#Schema Evolution
#Parquet
#Delta Lake
Difficulty Radar
Based on recent AI-sourced data.
Meet Your Interviewers
The "Standard" Interviewer
Senior EngineerFocuses on core competencies, system constraints, and clear communication.
SimulateUnwritten Rules
Think Out Loud
Always explain your thought process before writing code or drawing architecture.