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47 interview questionsfor developers (2026)

Test your developer skills before an interview with 47 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

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47 questions
Easy
50 votes3519 runs0 comment

Write a SQL query to retrieve the list of employees with a salary greater than 5100.

Back-end developer
sql
select
where
Vincent Cotroat Mar 30, 2023
Easy
20 votes3466 runs0 comment

Select only distinct values in a column using SQL

Back-end developer
sql
distinct
Vincent Cotroat Mar 27, 2023
Easy
19 votes3377 runs1 comment

Update a column in an SQL table

Back-end developer
sql
update
Vincent Cotroat Nov 7, 2023
Easy
18 votes3485 runs0 comment

Write a SQL query to insert data into a table

Back-end developer
sql
insert
Vincent Cotroat Mar 27, 2023
Easy
16 votes3444 runs0 comment

Which SQL keyword is used to sort the result of a SELECT statement?

Back-end developer
sql
order by
Vincent Cotroat Mar 27, 2023
Medium
14 votes3408 runs4 comments

Write the SQL query to delete a column from a table

Back-end developer
sql
table
column
Vincent Cotroat Mar 27, 2023
Easy
11 votes3386 runs0 comment

How to delete an SQL table?

Back-end developer
sql
tables
Vincent Cotroat Mar 27, 2023
Easy
11 votes3277 runs0 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
Vincent Cotroat Mar 28, 2023
Easy
10 votes3364 runs0 comment

Count the number of rows in an SQL table

Back-end developer
sql
count
Vincent Cotroat Mar 27, 2023
Easy
8 votes3444 runs
5 comments

Write an INNER JOIN query in SQL

Back-end developer
sql
join
Vincent Cotroat Mar 27, 2023
Easy
8 votes3276 runs
2 comments

Write a SQL query to increase the salary of all employees by 10%.

Back-end developer
sql
update
salary
Vincent Cotroat Mar 28, 2023
Easy
8 votes3206 runs0 comment

Write a SQL query to get the total order amount for each customer.

Back-end developer
sql
sum
group by
Vincent Cotroat Mar 28, 2023
Easy
8 votes2955 runs1 comment

Write a SQL query to retrieve employees with a salary higher than the average salary.

Back-end developer
sql
average
select
Vincent Cotroat Mar 28, 2023
Hard
8 votes2831 runs2 comments

Write a SQL query to get the order_id and total number of items for each order.

Back-end developer
sql
join
group by
Vincent Cotroat Jan 2, 2024
Easy
6 votes3280 runs0 comment

Write a SQL query to calculate the total quantities sold for each product_id.

Back-end developer
sql
sum
group by
Vincent Cotroat Mar 28, 2023
Easy
6 votes948 runs0 comment

Write a SQL query to get the total sales quantity for each product.

Back-end developer
sql
sum
group by
JOHANat Jul 19, 2024
Easy
4 votes3387 runs
9 comments

Which SQL keyword is used to filter the results of a SELECT statement based on a specified condition?

Back-end developer
sql
select
where
Vincent Cotroat Mar 27, 2023
Medium
4 votes1033 runs1 comment

Write the SQL code to create a table with a primary key

Back-end developer
sql
primary key
Vincent Cotroat Nov 15, 2023
Easy
3 votes753 runs0 comment

Which SQL command allows you to define a constraint on the range of values of a column when creating a table?

Back-end developer
sql
constraints
Louis Prevosteauat May 15, 2023
Hard
2 votes672 runs0 comment

Write a SQL query to get the average of the number of orders per customer.

Data Scientist
sql
error
Clément Devosat Dec 2, 2021