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Updated weekly · Last refresh Oct 17

DataVisor Software Engineer Interview Questions

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

50questions
~8htotal time
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1
CodingStart here. 30 questions · ~304 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
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2
Execution8 questions · ~81 min
Peak Element CodingMedium

Tests array reasoning and correctness for peak-finding style problems.

TestingsqlAutomationDataVisor
Concurrency and Multithreading in JavaMedium

Tests practical concurrency control and thread-safety knowledge in Java.

system designjavaconcurrencyDataVisor
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3
Behavioral & Leadership8 questions · ~81 min
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4
More topics4 questions · ~40 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
Bean in Spring BootEasy

Evaluates your understanding of Spring's dependency injection and component lifecycle.

technical knowledgespring bootDataVisor
SQL/NoSQL and Kafka FundamentalsMedium

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

kafkanosqlsqlDataVisor

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Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Data Cleaning and PrepMedium
Practice
Practice drill

Prepare valid encounter records by trimming text, excluding missing values, and removing invalid charges.

missing valuesdata cleaningData WranglingMassachusetts General HospitalCognizantDataVisor
Unique Elements and Top-K FrequenciesMedium
Practice
Practice drill

Return the first row for each unique value, then rank the k most frequent values.

large datasetsData Structurescomplex queriesEverlaw
7th Nearest Palindrome CodingHard
Practice
Practice drill

Return the seventh closest palindrome for each valid input number, using recursive query logic and ordered ranking.

Dynamic ProgrammingCTEscomplex queriesDeloitte
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.