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MySQL Online Test

The MySQL Online Test uses scenario-based MCQs to evaluate candidates on their proficiency in using MySQL, including their knowledge of SQL queries, database design, normalization, indexing, transactions, and stored procedures. The test aims to evaluate a candidate's ability to work with MySQL databases and use its various features to manage and manipulate data.

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Screen candidates with a 40 mins test

Test duration:  ~ 40 mins
Difficulty level:  Moderate
Availability:  Available as custom test
Questions:
  • 7 SQL MCQs
  • 8 MySQL MCQs
Covered skills:
MySQL
Database Design
SQL Queries
Normalization
Indexing
Joins
Data Manipulation Language
Data Definition Language
Views
Stored Procedures
Triggers
Transactions
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Use the MySQL Test to shortlist qualified candidates

The MySQL Online Test helps recruiters and hiring managers identify qualified candidates from a pool of resumes, and helps in taking objective hiring decisions. It reduces the administrative overhead of interviewing too many candidates and saves time by filtering out unqualified candidates at the first step of the hiring process.

The test screens for the following skills that hiring managers look for in candidates:

  • Able to design and create efficient database structures
  • Proficient in writing SQL queries for data retrieval and manipulation
  • Experienced in database normalization to minimize redundancy and improve data integrity
  • Skilled in indexing techniques for optimizing query performance
  • Able to write complex SQL joins for data extraction from multiple tables
  • Familiar with data manipulation language (DML) for data insertion, updating, and deletion
  • Knowledgeable in data definition language (DDL) for creating and modifying database objects
  • Experienced in working with views for simplifying complex query logic
  • Proficient in writing stored procedures for encapsulating common operations
  • Skilled in implementing triggers to automate actions based on database events
  • Knowledgeable in managing transactions to ensure data consistency and integrity
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Screen candidates with the highest quality questions

We have a very high focus on the quality of questions that test for on-the-job skills. Every question is non-googleable and we have a very high bar for the level of subject matter experts we onboard to create these questions. We have crawlers to check if any of the questions are leaked online. If/ when a question gets leaked, we get an alert. We change the question for you & let you know.

How we design questions

These are just a small sample from our library of 15,000+ questions. The actual questions on this MySQL Online Test will be non-googleable.

🧐 Question

Medium

Multi Select
JOIN
GROUP BY
Solve
Consider the following SQL table:
 image
How many rows does the following SQL query return?
 image

Medium

nth highest sales
Nested queries
User Defined Functions
Solve
Consider the following SQL table:
 image
Which of the following SQL commands will find the ‘nth highest Sales’ if it exists (returns null otherwise)?
 image

Medium

Select & IN
Nested queries
Solve
Consider the following SQL table:
 image
Which of the following SQL queries would return the year when neither a football or cricket winner was chosen?
 image

Medium

Sorting Ubers
Nested queries
Join
Comparison operators
Solve
Consider the following SQL table:
 image
What will be the first two tuples resulting from the following SQL command?
 image

Hard

With, AVG & SUM
MAX() MIN()
Aggregate functions
Solve
Consider the following SQL table:
 image
How many tuples does the following query return?
 image

Medium

Exists Where
Solve
Consider the following MySQL tables:
 image
What cids are returned by the following MySQL query for the above instance of the tables?
 image

Medium

Count, Distinct, SubQuery
Solve
Consider the following MySQL tables:
 image
What will be the output of the following MySQL query?
 image

Medium

Having, Group By
Solve
Consider the following MySQL table. 
 image
How many rows are returned for following MySQL query?
 image
🧐 Question🔧 Skill

Medium

Multi Select
JOIN
GROUP BY

2 mins

SQL
Solve

Medium

nth highest sales
Nested queries
User Defined Functions

3 mins

SQL
Solve

Medium

Select & IN
Nested queries

3 mins

SQL
Solve

Medium

Sorting Ubers
Nested queries
Join
Comparison operators

3 mins

SQL
Solve

Hard

With, AVG & SUM
MAX() MIN()
Aggregate functions

2 mins

SQL
Solve

Medium

Exists Where

2 mins

MySQL
Solve

Medium

Count, Distinct, SubQuery

2 mins

MySQL
Solve

Medium

Having, Group By

2 mins

MySQL
Solve
🧐 Question🔧 Skill💪 Difficulty⌛ Time
Multi Select
JOIN
GROUP BY
SQL
Medium2 mins
Solve
nth highest sales
Nested queries
User Defined Functions
SQL
Medium3 mins
Solve
Select & IN
Nested queries
SQL
Medium3 mins
Solve
Sorting Ubers
Nested queries
Join
Comparison operators
SQL
Medium3 mins
Solve
With, AVG & SUM
MAX() MIN()
Aggregate functions
SQL
Hard2 mins
Solve
Exists Where
MySQL
Medium2 mins
Solve
Count, Distinct, SubQuery
MySQL
Medium2 mins
Solve
Having, Group By
MySQL
Medium2 mins
Solve

Test candidates on core MySQL Hiring Test topics

MySQL: MySQL is an open-source relational database management system that is widely used for storing and managing large volumes of data. It is fast, reliable, and provides excellent scalability, making it a popular choice for various applications. The MySQL skill is measured in this test to assess the candidate's ability to work with databases and perform tasks such as creating, modifying, and querying tables.

Database Design: Database design is the process of creating a structure and layout for a database that ensures efficient data storage and retrieval. It involves defining the tables, relationships, and constraints based on the requirements of the system. Measuring the database design skill in this test helps evaluate the candidate's ability to design a well-structured database that meets the needs of the application.

SQL Queries: SQL (Structured Query Language) is a programming language used for managing relational databases. It allows users to retrieve, manipulate, and analyze data stored in tables using various types of queries. Testing the SQL query skill in this test helps assess the candidate's proficiency in writing efficient and accurate queries to retrieve specific data from the database.

Normalization: Normalization is the process of organizing data in a database to eliminate redundancy and dependency issues. It involves breaking down data into smaller, manageable tables and defining relationships between them. Evaluating the candidate's knowledge of normalization in this test helps ensure they can design and maintain databases that adhere to best practices and minimize data integrity problems.

Indexing: Indexing is a technique used to improve the performance of database queries by creating data structures, called indexes, that provide quick access to specific data. It involves selecting appropriate columns to create indexes on and optimizing their usage. Measuring the indexing skill in this test helps determine the candidate's ability to optimize query performance and optimize the overall database efficiency.

Joins: Joins in SQL are used to combine rows from two or more tables based on related columns between them. They allow for the retrieval of data from multiple tables by establishing relationships and specifying join conditions. Testing the join skill in this test helps evaluate the candidate's ability to retrieve and combine data from multiple tables using various types of joins.

Data Manipulation Language: Data Manipulation Language (DML) is a subset of SQL used for performing actions such as inserting, updating, and deleting data in a database. It allows users to modify the content of tables to reflect changes in the application. Assessing the DML skill in this test helps ensure the candidate can manipulate data accurately and efficiently.

Data Definition Language: Data Definition Language (DDL) is a subset of SQL used for creating, modifying, and deleting database structures and objects. It includes commands to create tables, define constraints, and alter the database schema. Measuring the DDL skill in this test helps evaluate the candidate's ability to design and manage the structure of a database effectively.

Views: Views in SQL are virtual tables created based on the result of a predefined query. They provide a way to simplify complex queries, enhance data security, and improve query performance. Evaluating the view skill in this test helps determine the candidate's proficiency in creating and utilizing views to facilitate data retrieval and manipulation.

Stored Procedures: Stored procedures are precompiled database programs that are stored in the database. They allow for the execution of complex tasks and logic on the server-side, reducing network traffic and improving performance. Testing the stored procedure skill in this test helps assess the candidate's ability to design, write, and manage stored procedures to optimize database performance and enhance application functionality.

Triggers: Triggers in SQL are a set of actions or instructions that are automatically executed in response to a specific event, such as an insert, update, or delete operation on a table. They help enforce data integrity, implement complex business rules, and maintain consistency in the database. Measuring the trigger skill in this test helps determine the candidate's proficiency in designing and implementing triggers to automate database actions and ensure data integrity.

Transactions: Transactions in databases ensure the atomicity, consistency, isolation, and durability of multiple database operations as a single unit of work. They help maintain data integrity and prevent data inconsistencies in case of failures or concurrent access. Assessing the transaction skill in this test helps evaluate the candidate's knowledge of transaction management and their ability to design and implement robust and reliable applications.

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Have questions about the MySQL Hiring Test?

How does pricing work?

You can check out our pricing plans.

Can I customize the test?

Yes, absolutely. Custom assessments are set up within 48 hours based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test. You can also customize a test by uploading your own questions.

Can I combine multiple skills into one test?

Yes, absolutely. Custom assessments are set up based on your job description, and will include questions on all must-have skills you specify. Here's a quick guide on how you can request a custom test.

What roles can I use the MySQL Test for?

Here are few roles for which we recommend this test:

  • MySQL Developer
  • MySQL Administrator
  • Database System Administrator
  • SQL Consultant
  • Data Analyst
Can I see a sample test, or do you have a free trial?

Yes!

The free trial includes one sample technical test (Java/ JavaScript) and one sample aptitude test that you will find in your dashboard when you sign up. You can use it to review the quality of questions and the candidate experience of giving a test on Adaface.

You can preview any of the 500+ tests and see the sample questions to decide if it would be a good fit for your requirements.

How do I interpret test scores?

The primary thing to keep in mind is that an assessment is an elimination tool, not a selection tool. A skills assessment is optimized to help you eliminate candidates who are not technically qualified for the role, it is not optimized to help you find the best candidate for the role. So the ideal way to use an assessment is to decide a threshold score (typically 55%, we help you benchmark) and invite all candidates who score above the threshold for the next rounds of interview.

I'm a candidate. Can I try a practice test?

No. Unfortunately, we do not support practice tests at the moment. However, you can use our sample questions for practice.

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