MySQL 8.0 Database Developer (1Z0 - 909) Exam Questions 2026 MySQL 8.0 Database Developer (1Z0 - 909) Questions 2026 Contains 370+ exam questions to pass the exam in first attempt. SkillCertPro offers real exam questions for practice for all major IT certifications. • For a full set of 380 questions. Go to https://skillcertpro.com/product/mysql - 8 - 0 - database - developer - 1z0 - 909 - exam - questions/ • SkillCertPro offers detailed explanations to each question which helps to understand the concepts better. • It is recommended to score above 85% in SkillCertPro exams before attempting a real exam. • SkillCertPro updates exam questions every 2 weeks. • You will get life time access and life time free updates • SkillCertPro assures 100% pass guarantee in first attempt. Below are the free 10 sample questions. Question 1: What is the purpose of the EXPLAIN statement in MySQL? A. To execute a query and retrieve the result set. B. To retrieve metadata about the tables used in a query. C. To optimize the query syntax. D. To analyze the query execution plan. Answer: D Explanation: The EXPLAIN statement in MySQL is used to analyze the query execution plan, helping to identify performance bottlenecks and optimize the query. Question 2: What is the purpose of a MySQL stored procedure? A. To manage database connections B. To load and store data in a database C. To define custom functions D. To execute a sequence of SQL statements Answer: D Explanation: The purpose of a MySQL stored procedure is to execute a sequence of SQL statements. Question 3 : Which MySQL configuration option can be adjusted to control the maximum number of rows examined for query optimization? A. max_rows_examined B. max_examined_rows C. optimization_max_rows D. query_optimization_rows Answer: A Explanation: The MySQL configuration option “max_rows_examined“ can be adjusted to control the maximum number of rows examined for query optimization, helping to limit the resources consumed by query execution. Question 4 : What is the purpose of the ORDER BY clause in a SQL query? A. To sort the queried data in ascending or descending order B. To join multiple tables in a query C. To aggregate data and perform calculations D. To filter the data based on a specific condition Answer: A Explanation: The ORDER BY clause is used to sort the queried data in ascending or descending order in a SQL query. Question 5 : What is the purpose of the INNER JOIN clause in a SQL query? A. To filter the data based on a specific condition B. To sort the queried data in ascending or descending order C. To aggregate data from multiple tables D. To combine rows from different tables based on a related column Answer: D Explanation: The INNER JOIN clause is used to combine rows from different tables based on a related column in a SQL query. • For a full set of 380 questions. Go to https://skillcertpro.com/product/mysql - 8 - 0 - database - developer - 1z0 - 909 - exam - questions/ • SkillCertPro offers detailed explanations to each question which helps to understand the concepts better. • It is recommended to score above 85% in SkillCertPro exams before attempting a real exam. • SkillCertPro updates exam questions every 2 weeks. • You will get life time access and life time free updates • SkillCertPro assures 100% pass guarantee in first attempt. Question 6 : What is the purpose of a MySQL trigger? A. To automatically index columns in a table B. To create temporary tables in a database C. To perform actions before or after an INSERT, UPDATE, or DELETE operation on a table D. To encrypt data in a table Answer: C Explanation: The purpose of a MySQL trigger is to perform actions before or after an INSERT, UPDATE, or DELETE operation on a table. Question 7 : What is the purpose of the LIMIT clause in a SQL query? A. To specify the number of records to be deleted B. To join multiple tables in a query C. To order the queried data in ascending order D. To restrict the number of rows returned by a query Answer: D Explanation: The LIMIT clause is used to restrict the number of rows returned by a query. Question 8 : What is the purpose of query rewriting in query optimization? A.To modify a query to enhance performance. B.To remove unnecessary calculations from a query. C.To convert a query into an optimized execution plan. D.To rewrite a query using simpler syntax. Answer: A Explanation: Query rewriting is the process of modifying a query to enhance performance, by rewriting the query structure or introducing optimization techniques. Question 9 : What is the purpose of using savepoints in a transaction? A. To optimize the query execution plan B. To specify a point in a transaction where it can be rolled back to if needed C. To isolate concurrent transactions from each other D. To create temporary tables within a transaction Answer: B Explanation: Savepoints in a transaction are used to specify a point within the transaction where it can be rolled back to if needed. Question 10 : What is the default value for a TIMESTAMP column in MySQL? A. 1 B. NULL C. CURRENT_TIMESTAMP Answer: B Explanation: NULL By default, a TIMESTAMP column in MySQL is initialized with a NULL value. If you want to automatically set the current timestamp when a new row is inserted, you can use the DEFAULT CURRENT_TIMESTAMP clause during table creation. • For a full set of 380 questions. Go to https://skillcertpro.com/product/mysql - 8 - 0 - database - developer - 1z0 - 909 - exam - questions/ • SkillCertPro offers detailed explanations to each question which helps to understand the concepts better. • It is recommended to score above 85% in SkillCertPro exams before attempting a real exam. • SkillCertPro updates exam questions every 2 weeks. • You will get life time access and life time free updates • SkillCertPro assures 100% pass guarantee in first attempt.