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40 interview questionsfor developers (2025)

Test your developer skills before an interview with 40 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

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40 questions
Expert
6 votes800 runs1 comment

How to obtain the surname and first name of people running more than 10 units?

Data Scientist
database
projection
selection
titouan lecampat Mar 28, 2022
Hard
4 votes674 runs
1 comment

What is GDPR?

Data Scientist
data
regulation
titouan lecampat Sep 19, 2022
Medium
3 votes613 runs0 comment

The decomposition normalization algorithm is?.

Data Scientist
database
normalization
titouan lecampat Sep 19, 2022
Easy
3 votes598 runs0 comment

What type of constraint was violated?

Data Scientist
database
primary key
uniqueness
Nicolasat Sep 19, 2022
Expert
2 votes730 runs0 comment

Find the keys of the following functional dependencies: a, b -> c a, b, d -> e c -> a, b d -> f e -> g

Data Scientist
database
functional dependencies
titouan lecampat Mar 28, 2022
Medium
2 votes672 runs1 comment

Which entity provides the legal framework supervising databases in France?

Data Scientist
database
france
titouan lecampat Sep 19, 2022
Expert
2 votes559 runs0 comment

What happens when you make the same transaction several times?

Data Scientist
database
transactions
titouan lecampat Sep 19, 2022
Medium
1 vote535 runs0 comment

What is the problem with a Cartesian product of tables?

Data Scientist
database
joins
titouan lecampat Mar 28, 2022
Hard
1 vote180 runs0 comment

Find the minimum number of functional dependencies to be removed in order to achieve a non redundant coverage.

Data Scientist
database
functional dependencies
titouan lecampat Mar 28, 2022
Medium
1 vote81 runs1 comment

What type of constraint was violated?

Data Scientist
database
constraint
titouan lecampat Mar 17, 2023
Easy
0 vote586 runs0 comment

What is a database?

Data Scientist
data
storage
titouan lecampat Sep 19, 2022
Hard
0 vote568 runs0 comment

Which of these propositions can be types of constraints in a database?

Data Scientist
database
constraints
titouan lecampat Sep 19, 2022
Expert
0 vote561 runs0 comment

Get all the names from the table E={(Name), (first name), time}.

Data Scientist
database
projection
titouan lecampat Sep 19, 2022
Expert
0 vote548 runs0 comment

Properties of an elementary functional dependency X$ ightarrow$Y

Data Scientist
database
functional dependency
titouan lecampat Sep 19, 2022
Medium
0 vote542 runs0 comment

What is a Table in a database?

Data Scientist
database
table
titouan lecampat Sep 19, 2022
Medium
0 vote538 runs0 comment

What does the bond 0..* mean in a database?

Data Scientist
database
cardinality
titouan lecampat Mar 28, 2022
Easy
0 vote538 runs0 comment

A relation must contain at least one key

Data Scientist
database
relation
titouan lecampat Mar 28, 2022
Easy
0 vote537 runs0 comment

How is a database managed with?

Data Scientist
database
management
titouan lecampat Mar 28, 2022
Expert
0 vote537 runs0 comment

Find the normal form of the relation {a -> b; c -> a, d, e; f -> a}.

Data Scientist
database
normal form
titouan lecampat Mar 28, 2022
Medium
0 vote531 runs0 comment

Given a table E={(Name), (first name), time} representing the time for a race, what type of constraint was violated?

Data Scientist
database
constraints
titouan lecampat Mar 28, 2022