Free Oracle MySQL 1Z1-922 Ultimate Study Guide (Updated 360 Questions)
Get to the Top with 1Z1-922 Practice Exam Questions
NEW QUESTION # 134
Which two commands can be used to restore a MySQL database from a backup?
- A. mysql --restore
- B. mysqlbackup --apply-log
- C. mysql --start-replication
- D. mysql < backup.sql
Answer: B,D
Explanation:
The mysql < backup.sql command is used to restore a database from a logical backup created by mysqldump. The mysqlbackup command with the --apply-log option is used to prepare a physical backup for restoration.
NEW QUESTION # 135
Which storage engine should you use if you need transactional support and foreign key constraints?
- A. MEMORY
- B. ARCHIVE
- C. MyISAM
- D. InnoDB
Answer: D
Explanation:
InnoDB is the only storage engine in MySQL that provides full support for transactions and foreign key constraints, making it ideal for applications that require data consistency and integrity.
NEW QUESTION # 136
Which two features of MySQL InnoDB Cluster help ensure high availability?
- A. Multi-source replication
- B. Automatic failover
- C. Distributed transaction consistency
- D. Read-write splitting
Answer: B,C
Explanation:
MySQL InnoDB Cluster ensures high availability through automatic failover, which promotes a replica to primary in case of failure, and distributed transaction consistency, which ensures that transactions are applied consistently across all nodes using Group Replication.
NEW QUESTION # 137
Which two types of locks does the InnoDB storage engine use?
- A. Table-level locking
- B. Row-level locking
- C. Page-level locking
- D. Clustered index locking
Answer: A,B
Explanation:
InnoDB uses row-level locking to allow greater concurrency, but it can also use table-level locking in certain situations to maintain consistency during DDL operations.
NEW QUESTION # 138
Which MySQL security tool provides real-time blocking of suspicious SQL queries to protect against attacks?
- A. MySQL Enterprise Firewall
- B. MySQL Enterprise Audit
- C. MySQL Enterprise Authentication
- D. MySQL Enterprise Backup
Answer: A
Explanation:
MySQL Enterprise Firewall provides real-time blocking of suspicious SQL queries by learning allowed query patterns and detecting deviations from those patterns. This capability is crucial for protecting the database against SQL injection and other malicious query-based attacks.
NEW QUESTION # 139
Which parameter in MySQL configures the maximum number of connections that can be handled simultaneously by the server?
- A. max_connections
- B. innodb_max_connections
- C. max_threads
- D. thread_cache_size
Answer: A
Explanation:
The max_connections parameter in my.cnf sets the maximum number of concurrent connections that the MySQL server can handle. Increasing this value allows more users to connect to the server at the same time.
NEW QUESTION # 140
Which MySQL Enterprise Edition feature helps to enforce user privileges?
- A. MySQL Enterprise Monitor MySQL
- B. MySQL Role-Based Access Control
- C. Cache
- D. Enterprise Backup MySQL Query
Answer: B
Explanation:
MySQL Role-Based Access Control (RBAC) allows for fine-grained control over user privileges, making it easier to manage database security and restrict access to specific actions within the database.
NEW QUESTION # 141
Which of the following grants ALL privileges to a user on a specific database?
- A. GRANT EXECUTE ON database_name.* TO 'user'@'host';
- B. GRANT ALL PRIVILEGES ON database_name.* TO 'user'@'host';
- C. GRANT SELECT ON *.* TO 'user'@'host';
- D. GRANT ALL PRIVILEGES ON *.* TO 'user'@'host';
Answer: B
Explanation:
The GRANT ALL PRIVILEGES ON database_name.* statement gives the specified user all privileges on the selected database.
NEW QUESTION # 142
Which MySQL Enterprise Edition feature allows you to track database activity in order to meet compliance requirements?
- A. MySQL Enterprise Monitor
- B. MySQL Enterprise Firewall
- C. MySQL Enterprise Audit
- D. MySQL Enterprise Backup
Answer: C
Explanation:
MySQL Enterprise Audit helps organizations track database activities and maintain compliance with regulations such as GDPR or HIPAA by logging user access and changes to the database.
NEW QUESTION # 143
Which of the following is a key scalability feature of the HeatWave Cluster?
- A. Automatic failover for transactional workloads
- B. Support for multiple databases
- C. Automatic query optimization
- D. Linear scaling with the addition of more nodes
Answer: D
Explanation:
A key feature of the HeatWave Cluster is its ability to scale linearly. As more HeatWave nodes are added, the performance of analytical queries improves proportionally, making it highly scalable for large datasets and workloads.
NEW QUESTION # 144
Which MySQL Enterprise Edition feature is used to detect and prevent SQL injection attacks?
- A. MySQL InnoDB Cluster
- B. MySQL Enterprise Firewall
- C. MySQL Enterprise Monitor
- D. MySQL Enterprise Backup
Answer: B
Explanation:
MySQL Enterprise Firewall is designed to prevent unauthorized database access, including SQL injection attacks, by analyzing and blocking potentially harmful queries. It is a key security feature included only in the Enterprise Edition.
NEW QUESTION # 145
How can you track the slowest queries in MySQL?
- A. By enabling the Query Cache
- B. By monitoring the Error Log
- C. By using the Slow Query Log
- D. By using MySQL Enterprise Backup
Answer: C
Explanation:
The Slow Query Log is a MySQL feature that records queries that take longer than a specified amount of time to execute. It helps identify queries that may need optimization.
NEW QUESTION # 146
Which two of the following are string datatypes in MySQL?
- A. VARCHAR
- B. BLOB
- C. INT
- D. CHAR
Answer: A,D
Explanation:
CHAR and VARCHAR are string datatypes in MySQL. CHAR is for fixed-length strings, and VARCHAR is for variable-length strings. BLOB is a binary large object, and INT is a numeric datatype.
NEW QUESTION # 147
What role does the InnoDB Storage Engine play in the MySQL architecture?
- A. Storing relational data and handling transactions
- B. Managing server configuration files
- C. Parsing SQL queries
- D. Performing data backups
Answer: A
Explanation:
InnoDB is the default storage engine in MySQL, responsible for storing data in relational tables, ensuring ACID compliance, and handling transactions. It provides features such as row-level locking, foreign key constraints, and crash recovery.
NEW QUESTION # 148
What is the default replication mode used in MySQL when no specific replication mode is configured?
- A. Asynchronous replication
- B. Synchronous replication
- C. Multi-source replication
- D. Semi-synchronous replication
Answer: A
Explanation:
The default replication mode in MySQL is asynchronous replication, where the primary server commits changes without waiting for confirmation from the replicas.
NEW QUESTION # 149
Which feature of MySQL Enterprise Audit assists in detecting unauthorized access?
- A. Data encryption
- B. Backup automation
- C. Logging failed login attempts
- D. Query optimization
Answer: C
Explanation:
MySQL Enterprise Audit logs failed login attempts, helping database administrators detect unauthorized access attempts and take necessary measures to prevent security breaches.
NEW QUESTION # 150
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