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78 questions
Expert
8 votes928 runs1 comment

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

Data Scientist
database
projection
selection
Anonymous authorat Mar 28, 2022
Medium
5 votes778 runs1 comment

Which entity provides the legal framework supervising databases in France?

Data Scientist
database
france
Anonymous authorat Sep 19, 2022
Expert
4 votes842 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
Anonymous authorat Mar 28, 2022
Expert
4 votes781 runs
1 comment

What is GDPR?

Data Scientist
data
regulation
Anonymous authorat Sep 19, 2022
Medium
3 votes714 runs0 comment

The decomposition normalization algorithm is?.

Data Scientist
database
normalization
Anonymous authorat Sep 19, 2022
Expert
2 votes651 runs0 comment

What happens when you make the same transaction several times?

Data Scientist
database
transactions
Anonymous authorat Sep 19, 2022
Medium
2 votes360 runs0 comment

Display lines containing 'Error' in all .txt files

System Administrator
grep
bash
Anonymous authorat Sep 19, 2022
Easy
1 vote674 runs0 comment

What is a database?

Data Scientist
data
storage
Anonymous authorat Sep 19, 2022
Expert
1 vote640 runs0 comment

Properties of an elementary functional dependency X$ ightarrow$Y

Data Scientist
database
functional dependency
Anonymous authorat Sep 19, 2022
Medium
1 vote624 runs0 comment

What is the problem with a Cartesian product of tables?

Data Scientist
database
joins
Anonymous authorat Mar 28, 2022
Medium
1 vote361 runs0 comment

Find the default shell for a user in Bash

System Administrator
bash
shell
Anonymous authorat Sep 19, 2022
Hard
1 vote325 runs
1 comment

Find all rows containing patterns 1 and 2 in a file using Bash

System Administrator
bash
grep
regular expression
Anonymous authorat Sep 19, 2022
Medium
1 vote320 runs0 comment

What does the shell prompt `user@user:~$` mean?

System Administrator
bash
shell
Anonymous authorat Sep 19, 2022
Hard
1 vote295 runs
3 comments

How to count the number of lines in a file in Bash

System Administrator
bash
command line
wc
Anonymous authorat Mar 23, 2022
Easy
1 vote282 runs0 comment

What does 2>&1 means in the script below? ``` compile "$i" > "${i%.txt}".ass 2>&1 ```

System Administrator
bash
redirect
Anonymous authorat Sep 19, 2022
Hard
1 vote197 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
Anonymous authorat Mar 28, 2022
Medium
1 vote87 runs1 comment

What type of constraint was violated?

Data Scientist
database
constraint
Anonymous authorat Mar 17, 2023
Medium
1 vote82 runs0 comment

How to set the permissions of a file in Bash?

System Administrator
permissions
chmod
Anonymous authorat Mar 23, 2022
Hard
1 vote80 runs0 comment

Display lines 4 to 12 of a file in Bash

System Administrator
bash
file
Anonymous authorat Mar 23, 2022
Hard
0 vote664 runs0 comment

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

Data Scientist
database
constraints
Anonymous authorat Sep 19, 2022