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48 interview questionsfor developers (2025)

Test your developer skills before an interview with 48 corrected questions on 80+ topics. Beginner, Intermediate or Expert level.

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48 questions
Easy
45 votes3142 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
19 votes3095 runs0 comment

Select only distinct values in a column using SQL

Back-end developer
sql
distinct
Vincent Cotroat Mar 27, 2023
Easy
18 votes3015 runs1 comment

Update a column in an SQL table

Back-end developer
sql
update
Vincent Cotroat Nov 7, 2023
Easy
17 votes3114 runs0 comment

Write a SQL query to insert data into a table

Back-end developer
sql
insert
Vincent Cotroat Mar 27, 2023
Easy
16 votes3080 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
12 votes3040 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
12 votes1545 runs
2 comments

Write a SQL query to retrieve the titles of books written by 'John Smith'.

Back-end developer
join
inner join
sql
Vincent Cotroat Sep 6, 2023
Easy
11 votes3035 runs0 comment

How to delete an SQL table?

Back-end developer
sql
tables
Vincent Cotroat Mar 27, 2023
Easy
11 votes2934 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
9 votes3011 runs0 comment

Count the number of rows in an SQL table

Back-end developer
sql
count
Vincent Cotroat Mar 27, 2023
Easy
8 votes2608 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
Easy
7 votes2931 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
7 votes2876 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
6 votes2931 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
Hard
6 votes2489 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 votes772 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
5 votes3081 runs
5 comments

Write an INNER JOIN query in SQL

Back-end developer
sql
join
Vincent Cotroat Mar 27, 2023
Medium
4 votes922 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 votes3029 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
Easy
3 votes714 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