Dataford
Dataford
Top 50
Company roadmap
Updated weekly · Last refresh Oct 17

Persistent Systems Interview Questions

The questions to prepare for Persistent Systems interviews, across all roles. Questions from real interview reports rank first. Updated daily.

50questions
~9htotal time
Track your progressSign up free to work through all 50 questions and resume where you left off.
Start practicing free →
1
CodingStart here. 5 questions · ~55 min
Reverse a String in PythonEasy
Practice
Recently asked

Reverse a string in Python using character traversal and return the reversed result.

StringsfunctionspythonPersistent Systems
More Coding questions with a free account
2
SQL & Data Manipulation5 questions · ~55 min
Second Highest Without AggregatesHard
Practice
Recently asked

Find the second highest salary in each department without using aggregate functions.

SubqueriesRankingSelf-JoinsPersistent Systems
More SQL & Data Manipulation questions with a free account

Sign up to see every question

Create a free account to unlock this list and practice real interview questions.

Get my prep plan
3
Machine Learning5 questions · ~55 min
Supervised vs Unsupervised LearningEasy

Explain how supervised and unsupervised learning differ, and ground the distinction in a practical ML example.

Unsupervised LearningFeature EngineeringBias-Variance TradeoffPersistent Systems
More Machine Learning questions with a free account
4
Product Sense5 questions · ~55 min
Turn Feedback Into New FeaturesMedium

Approach for turning user feedback into a well-scoped feature, with clear prioritization, MVP definition, and success metrics.

User ResearchFeature PrioritizationUser NeedsPersistent Systems
More Product Sense questions with a free account
5
Execution5 questions · ~55 min
Prioritize Work Under Tight DeadlinesEasy

Explain how you prioritize competing work under time pressure while making trade-offs and keeping stakeholders aligned.

Trade-offsRoadmappingScope ManagementPersistent Systems
More Execution questions with a free account
6
Pipelines5 questions · ~55 min
Data Quality and Schema EvolutionMedium
Recently asked

Approach for handling schema changes and data quality checks in a high-volume data lake pipeline.

schema evolutionData ModelingQualityPersistent Systems
More Pipelines questions with a free account
7
More topics20 questions · ~220 min
Approach to Underperforming ModelsMedium

Structured approach for diagnosing an underperforming model and deciding whether to fix data, thresholding, calibration, or the model.

PrecisionAccuracyRecallPersistent Systems
Design an Enterprise RAG PipelineHard

Design an enterprise RAG system that balances retrieval quality, grounded answers, and low latency over frequently changing internal data.

latencyRAG pipelinesAccuracyPersistent Systems
More questions with a free account
The finish line: interview-readyComplete all 50 questions to finish this plan.