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Updated weekly · Last refresh Aug 30

DataVisor Software Engineer Interview Questions

The questions to prepare for a DataVisor Software Engineer interview. Questions from real interview reports rank first. Updated weekly.

50questions
~8htotal time
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1
CodingStart here. 31 questions · ~295 min
Insert Delete GetRandom in O(1)Medium
Practice

Implement O(1) insert, delete, and uniform random retrieval using an array and hash map.

Data StructuresDataVisor
Swap Adjacent Elements in Linked ListEasy
Practice

Rearrange a singly linked list by swapping every adjacent pair of nodes in place.

DataVisor
Merge Two Sorted ArraysEasy
Practice

Merge two sorted arrays into one sorted array using a two-pointer linear scan.

ArraysSortingTwo PointersDataVisor
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2
Execution8 questions · ~76 min
Spring Boot Microservices at ScaleMedium

Tests knowledge of microservice frameworks and scalable service design.

system designspring bootmicroservicesDataVisor
Redis Caching for High TrafficMedium

Tests caching strategy understanding and performance tradeoffs.

system designcachingDataVisor
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3
Behavioral & Leadership8 questions · ~76 min
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4
More topics3 questions · ~29 min
Java JSON Data JobMedium

Evaluates your practical experience with Java-based data manipulation and JSON handling.

javaDataVisor
Online Streaming System DesignHard

Evaluates system design tradeoffs for real-time ingestion, processing, and delivery at scale.

streamingarchitectureDataVisor
SQL/NoSQL and Kafka FundamentalsMedium

Assesses your understanding of data storage models and event streaming concepts.

kafkanosqlsqlDataVisor
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Sum From 1 to 1,000,000Easy
Practice
Practice drill

Calculate the sum of integers from 1 to 1,000,000 using PostgreSQL aggregation and filtering.

AlgorithmsVirtu Financial
Top-Performing Products QueryMedium
Practice
Practice drill

Rank Tesco products by Q2 revenue using a date-filtered join, aggregation, and RANK window function.

sqlperformance analysisTTesco
Top-Performing Segments QueryMedium
Practice
Practice drill

Rank Volkswagen Group Italia product segments by quarterly revenue over the latest three quarters using joins, aggregation, and RANK().

sqlperformance analysisVolkswagen Group Italia
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.