MySQL 8.0 Database Developer (1Z0-909) Exam Questions 2024

MySQL 8.0 Database Developer (1Z0-909) Practice Tests 2024. Contains 350+ exam questions to pass the exam in first attempt.

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Below are the free 10 sample questions.

Question 1:

What is the role of the MySQL Query Optimizer?

A. To automatically create indexes for all database tables

B. To manage user access and permissions

C. To analyze query execution plans and choose the most efficient one

D. To optimize query performance by rewriting SQL queries

Answer: C

Explanation:

The MySQL Query Optimizer analyzes the available execution plans for a query and chooses the one that is expected to be most efficient based on the available indexes and statistics.

Question 2:

What is the benefit of using an ORM (Object Relational Mapping) in data-driven applications?

A. It enables real-time data analytics

B. It improves database performance

C. It simplifies the process of querying data

D. It enhances data security

Answer: C

Explanation:

ORMs provide a higher-level abstraction for interacting with databases, simplifying the process of querying and manipulating data.

Question 3:

Which of the following factors can impact query performance in MySQL?

A. Index usage

B. Server hardware specifications

C. Database size

D. Network latency

Answer: A

Explanation:

Factors such as index usage, network latency, server hardware specifications, and database size can impact query performance in MySQL.

Question 4:

Which of the following is an example of a transactional resource in MySQL?

A. Index

B. Column

C. Lock

D. Table

Answer: C

Explanation:

Locks are transactional resources in MySQL that are used to control concurrent access to database objects.

Question 5:

What is an API in the context of data-driven applications?

A. An Automated Performance Indicator

B. An Algorithmic Programming Instruction

C. An Advanced Programming Integration

D. An Application Programming Interface

Answer: D

Explanation:

API stands for Application Programming Interface, which defines the methods for how different software components should interact with each other.

For a full set of 350 questions. Go to

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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 the DELETE statement in MySQL?

A. To update data in a table.

B. To delete data from a table.

C. To retrieve data from a table.

D. To insert new data into a table.

Answer: B

Explanation:

The purpose of the DELETE statement in MySQL is to delete data from a table.

Question 7:

What is the syntax for creating a stored function in MySQL?

A. CREATE VIEW view_name AS SELECT ...

B. CREATE FUNCTION function_name RETURNS return_type BEGIN ... END

C. CREATE PROCEDURE procedure_name (parameters) BEGIN ... END

D. CREATE TRIGGER trigger_name BEFORE INSERT ON table_name FOR EACH ROW BEGIN ... END

Answer: B

Explanation:

The syntax for creating a stored function in MySQL is CREATE FUNCTION function_name RETURNS return_type BEGIN … END.

Question 8:

Which of the following is an example of a query optimization technique that can be used in MySQL?

A. Encryption

B. Load balancing

C. Caching

D. Compression

Answer: C

Explanation:

Caching is a query optimization technique that involves storing the results of frequently executed queries in memory for faster retrieval.

Question 9:

What is an API in MySQL?

A. A programming interface that allows applications to interact with MySQL

B. A graphical user interface for managing MySQL databases

C. A command-line tool for executing SQL queries in MySQL

D. A type of database engine in MySQL

Answer: A

Explanation:

An API in MySQL is a programming interface that allows applications to interact with MySQL.

Question 10:

Which of the following connectors is officially supported by MySQL for connecting with Java applications?

A. SQLAlchemy

B. ODBC

C. ADO.NET

D. JDBC

Answer: D

Explanation:

JDBC (Java Database Connectivity) is the official connector supported by MySQL for connecting with Java applications.

For a full set of 350 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.