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Group 2@2x
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Vincent Cotro
Vincent Cotro
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2091
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525
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145
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143 questions
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8
Medium
70 votes
2939 runs
4 comments
Understanding the differences between `map()` and `forEach()` methods in JavaScript
Web developer
at Jan 18, 2024
Easy
32 votes
2403 runs
0 comment
Write a SQL query to retrieve the list of employees with a salary greater than 5100.
Back-end developer
sql
select
where
at Mar 30, 2023
Medium
31 votes
2702 runs
3 comments
Write a JavaScript function that fetches data from an API and logs it to the console.
Web developer
promises
async
at Mar 28, 2023
Easy
30 votes
1400 runs
1 comment
Write a Python function that returns the factorial of a number.
Back-end developer
recursion
at Mar 28, 2023
Easy
24 votes
1511 runs
1 comment
Explain the difference between the `include` and `require` functions in PHP.
Back-end developer
functions
errors
at Mar 24, 2023
Easy
15 votes
2369 runs
0 comment
Select only distinct values in a column using SQL
Back-end developer
sql
distinct
at Mar 27, 2023
Easy
15 votes
2313 runs
1 comment
Update a column in an SQL table
Back-end developer
sql
update
at Nov 7, 2023
Easy
12 votes
2381 runs
0 comment
Write a SQL query to insert data into a table
Back-end developer
sql
insert
at Mar 27, 2023
Easy
12 votes
2358 runs
0 comment
Which SQL keyword is used to sort the result of a SELECT statement?
Back-end developer
sql
order by
at Mar 27, 2023
Medium
10 votes
2319 runs
4 comments
Write the SQL query to delete a column from a table
Back-end developer
sql
table
column
at Mar 27, 2023
Easy
10 votes
2257 runs
0 comment
Write a SQL query to retrieve the products with a price less than 1000 and sort the results in descending order of price.
Back-end developer
sql
order by
descending
at Mar 28, 2023
Easy
9 votes
1054 runs
1 comment
Write a SQL query to retrieve the titles of books written by 'John Smith'.
Back-end developer
join
inner join
sql
at Sep 6, 2023
Easy
8 votes
1517 runs
0 comment
Write a React component that updates the document title with each click and resets to 'React App' when the component unmounts.
Web developer
react
hooks
useState
at Apr 5, 2023
Easy
8 votes
965 runs
0 comment
Which of the following utility types makes all properties of a given type optional?
Web developer
typescript
types
at Mar 29, 2023
Easy
7 votes
2341 runs
0 comment
How to delete an SQL table?
Back-end developer
sql
tables
at Mar 27, 2023
Easy
7 votes
793 runs
2 comments
What is the size of a long long in C++?
IT Architect
c++
memory
at Nov 3, 2023
Medium
6 votes
3184 runs
2 comments
Print the number of countries in the array travel.
Web developer
array
for loop
at Sep 5, 2022
Easy
6 votes
2319 runs
5 comments
Write a SQL query to retrieve the names of students enrolled in the course with ID 1.
Back-end developer
join
inner join
sql
at Mar 28, 2023
Easy
6 votes
2242 runs
0 comment
Write a SQL query to calculate the total quantities sold for each product_id.
Back-end developer
sql
sum
group by
at Mar 28, 2023
Vincent Cotro
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Vincent Cotro
Medium
8 votes
521 runs
0 comment
What is the best practice to apply in your code to improve the performance of your application?
Back-end developer
performance
gzip
at Nov 15, 2023
Vincent Cotro
