Dataford
Top 16
Prep plan
Updated weekly · Last refresh Sep 22

Unknowns Full Stack Engineer Interview Questions

The questions to prepare for a Unknowns Full Stack Engineer interview. Questions from real interview reports rank first. Updated daily.

16questions
~2htotal time
Track your progressSign up free to work through all 16 questions and resume where you left off.
Start practicing free →
1
Technical FundamentalsStart here. 7 questions · ~57 min
What Is Rest API, Differences Between Rest and Rest APIsMedium

Evaluates understanding of RESTful APIs and terminology.

restapi designUnknowns
Explain the Difference Between REST and REST APIsMedium

Assesses understanding of REST concepts and API design.

restapi designUnknowns
More Technical Fundamentals questions with a free account
2
More topics9 questions · ~73 min
Describe Your Process for Handling Case-Based Scenarios During a System BuildMedium

Evaluates problem solving and design reasoning in build contexts.

system designUnknowns
Explain What You Did in Your Automation Assignment with PuppeteerMedium

Evaluates Puppeteer automation approach and outcomes.

web testingAutomationUnknowns
What Indexing MeansMedium

Assesses your understanding of database indexing and its impact on query performance.

indexingdatabasesUnknowns
Synchronous vs AsynchronousMedium

Tests ability to reason about concurrency, execution flow, and when to use async patterns.

RecursionQueueUnknowns
Case-Based Scenario and Aptitude QuestionMedium

Tests case reasoning and analytical thinking.

Unknowns
Approach to Writing Automation Tests for a WebsiteMedium

Tests test strategy, tooling choices, and coverage considerations.

web testingUnknowns
More 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
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Second Highest Trader SalaryEasy
Practice
Practice drill

Find the second highest distinct salary from a single table using basic PostgreSQL ordering and limiting.

SubqueriesRankingSortingeClinicalWorksNNeenOpal CanadaInformatica
SQL Query for Data ExtractionEasy
Practice
Practice drill

Extract qualifying market observations by venue and price, then return them in chronological order.

JoinsData ManipulationGroup ByEquifaxDPR ConstructionRigUp
SQL Query for Customer DataEasy
Practice
Practice drill

Extract selected customer fields from Unknowns' customer table and return them in customer ID order.

JoinsData Wranglingdatabase queryingUnknowns
The finish line: interview-readyComplete all 16 questions plus 3 hands-on drills to finish this plan.