Dataford
Dataford
Top 50
Prep plan
Updated weekly · Last refresh Oct 26

JOHN LEONARD Software Engineer Interview Questions

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

50questions
~8htotal time
Track your progressSign up free to work through all 50 questions and resume where you left off.
Start practicing free →
1
CodingStart here. 15 questions · ~135 min
Longest Palindromic SubstringHard
Practice
Recently asked

Find the earliest longest palindromic substring using Manacher's linear-time string algorithm.

Dynamic ProgrammingJOHN LEONARD
Debug Complex SystemsMedium
Recently asked

Tests your systematic troubleshooting approach and ability to isolate root causes.

Problem SolvingDebuggingJOHN LEONARD
More Coding questions with a free account
2
Execution4 questions · ~36 min
Your Strengths and WeaknessesEasy
Recently asked

Give a specific, self-aware account of your strengths and weaknesses, supported by relevant examples and improvement actions.

Trade-offsSuccess CriteriaExecutionJOHN LEONARD
More Execution 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
Technical Fundamentals3 questions · ~27 min
Do You Have .NET Framework ExperienceEasy
Recently asked

Evaluates fit for .NET-based development needs in the role.

experienceJOHN LEONARD
Interface vs Abstract ClassEasy
Recently asked

Tests core Java OOP knowledge around interfaces and abstract classes.

javaJOHN LEONARD
More Technical Fundamentals questions with a free account
4
System Design4 questions · ~36 min
Build and Verify a Complete SystemHard
Recently asked

Assesses end-to-end ownership and completeness criteria for a system you built.

JOHN LEONARD
More System Design questions with a free account
5
Behavioral & Leadership21 questions · ~189 min
More Behavioral & Leadership questions with a free account
6
More topics3 questions · ~27 min
Interpret Node and Terraform CodeMedium
Recently asked

Evaluates your ability to read and reason about infrastructure and scripting code.

terraformJOHN LEONARD
Combine CSVs Coding ChallengeMedium
Recently asked

Tests your problem-solving approach for a practical data manipulation coding task.

Data ManipulationProblem SolvingJOHN LEONARD
More questions with a free account
Hands-on SQL practiceWrite and run real queries in the editor. 3 drills · ~30 min
Consecutive Login Days SQLHard
Practice
Practice drill

Find each user's longest consecutive login streak by deduplicating login dates and identifying gaps between days.

Date FunctionsData ManipulationProblem SolvingDidi ChuxingByteDance
Camel Banana Case StudyMedium
Practice
Practice drill

Calculate bananas remaining after each transport stage using joins, conditional trip counts, and aggregation.

Data ManipulationProblem Solvingcase studyPhonepe
SQL Window Functions ApproachMedium
Practice
Practice drill

Explain and demonstrate how to rank filtered transaction rows within each account using a PostgreSQL window function.

Window Functionsnull handlingData ManipulationLLloyds Technology Centre
The finish line: interview-readyComplete all 50 questions plus 3 hands-on drills to finish this plan.