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Group 2@2x
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Vincent Cotro
Vincent Cotro
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525
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144 questions
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8
Medium
65 votes
2790 runs
4 comments
Understanding the differences between `map()` and `forEach()` methods in JavaScript
Web developer
at Jan 18, 2024
Easy
29 votes
2233 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
Easy
29 votes
1298 runs
1 comment
Write a Python function that returns the factorial of a number.
Back-end developer
recursion
at Mar 28, 2023
Medium
28 votes
2565 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
21 votes
1414 runs
1 comment
Explain the difference between the `include` and `require` functions in PHP.
Back-end developer
functions
errors
at Mar 24, 2023
Easy
14 votes
2204 runs
0 comment
Select only distinct values in a column using SQL
Back-end developer
sql
distinct
at Mar 27, 2023
Easy
14 votes
2149 runs
1 comment
Update a column in an SQL table
Back-end developer
sql
update
at Nov 7, 2023
Easy
12 votes
2213 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
2193 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
2154 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
2101 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
963 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
902 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
Medium
8 votes
481 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
Easy
7 votes
2181 runs
0 comment
How to delete an SQL table?
Back-end developer
sql
tables
at Mar 27, 2023
Easy
7 votes
1404 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
7 votes
775 runs
2 comments
What is the size of a long long in C++?
IT Architect
c++
memory
at Nov 3, 2023
Medium
6 votes
3052 runs
2 comments
Print the number of countries in the array travel.
Web developer
array
for loop
at Sep 5, 2022
Easy
6 votes
2084 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
Easy
6 votes
2044 runs
0 comment
Write a SQL query to get the total order amount for each customer.
Back-end developer
sql
sum
group by
at Mar 28, 2023
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