MySQL is an open-source relational database management system (RDBMS) that has been a cornerstone of web applications and data-driven solutions for over two decades. Developed by Oracle, MySQL offers a robust and efficient platform for storing, managing, and retrieving structured data. Its features include support for SQL, high performance, scalability, and extensive community support. MySQL is widely used for web development, e-commerce, content management systems, and more, making it a versatile and trusted database solution for organizations of all sizes, from startups to large enterprises.
Show All Answers
Practice Test
151. What is the purpose of the MySQL "ERROR" log file?
A. To store user authentication data
B. To log database changes
C. To record database errors
D. To optimize query performance
Show Answer
Report This Question
Answer: To record database errors
152. What does the "MySQL Query Cache" do and why might it cause issues?
A. It caches query results
B. It prevents query execution
C. It compresses data
D. It encrypts data
Show Answer
Report This Question
Answer: It caches query results
153. What is the primary purpose of the MySQL "Slow Query Log"?
A. To record successful queries
B. To store query execution plans
C. To identify slow queries
D. To optimize query performance
Show Answer
Report This Question
Answer: To identify slow queries
154. What can cause the "Too Many Connections" error in MySQL?
A. Insufficient disk space
B. Excessive concurrent connections
C. Low query complexity
D. High query performance
Show Answer
Report This Question
Answer: Excessive concurrent connections
155. Which MySQL tool can you use to check and repair corrupted tables?
A. mysqlimport
B. MySQL Workbench
C. mysqlrepair
D. mysqlcheck
Show Answer
Report This Question
Answer: mysqlcheck
156. What is a common reason for the "Can't connect to MySQL server on 'localhost'" error?
A. Incorrect database password
B. Missing client libraries
C. Insufficient disk space
D. Query optimization issues
Show Answer
Report This Question
Answer: Missing client libraries
157. What is the primary reason for the "InnoDB: Error: Table space is full" error in MySQL?
A. Excessive connections
B. Running out of disk space
C. Query cache issues
D. Encryption errors
Show Answer
Report This Question
Answer: Running out of disk space
158. What does the "Deadlock" error in MySQL indicate?
A. A server crash
B. A query optimization issue
C. A situation where two or more transactions block each other
D. A corrupted table
Show Answer
Report This Question
Answer: A situation where two or more transactions block each other
159. What could cause the "Lost connection to MySQL server during query" error?
A. A failed database import
B. Excessive concurrent connections
C. Slow query execution
D. Network issues
Show Answer
Report This Question
Answer: Network issues
160. What is the primary purpose of the "Explain" statement in MySQL?
A. To log query execution time
B. To view and optimize query execution plans
C. To troubleshoot server crashes
D. To export query results
Show Answer
Report This Question
Answer: To view and optimize query execution plans
