[UPDATED Oct-2025] Best Value Available Preparation Guide for 1Z0-922 Exam
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NEW QUESTION # 163
Which backup type in MySQL includes only the changes made since the last full backup?
- A. Full backup
- B. Logical backup
- C. Binary log backup
- D. Incremental backup
Answer: D
Explanation:
An incremental backup stores only the changes made since the last full or incremental backup, reducing the size and time required to perform the backup.
NEW QUESTION # 164
How do you ensure a MySQL table column automatically assigns a unique sequential value to each new row?
- A. Add an AUTO_INCREMENT attribute
- B. Use a sequence
- C. Use a UNIQUE constraint
- D. Add a PRIMARY KEY constraint
Answer: A
Explanation:
The AUTO_INCREMENT attribute ensures that each new row receives a unique sequential value in the specified column, usually used for primary keys.
NEW QUESTION # 165
Which command provides an overview of the current MySQL server status, including uptime, threads, and queries?
- A. SHOW ENGINE INNODB STATUS;
- B. SHOW STATUS;
- C. SHOW PROCESSLIST;
- D. SHOW VARIABLES;
Answer: B
Explanation:
The SHOW STATUS; command provides a detailed overview of the current MySQL server status, including information about connections, queries, uptime, and other performance metrics.
NEW QUESTION # 166
What does MySQL InnoDB Cluster's use of Group Replication ensure?
- A. High performance for read-heavy workloads
- B. Backup files are compressed
- C. Automatic fault tolerance and failover
- D. Transactions are asynchronously replicated
Answer: C
Explanation:
Group Replication in MySQL InnoDB Cluster ensures automatic fault tolerance and failover, allowing the cluster to continue operating if one node fails by automatically promoting another node to take over as the primary server.
NEW QUESTION # 167
Which two commands can be used to restore a MySQL database from a backup?
- A. mysql < backup.sql
- B. mysql --restore
- C. mysql --start-replication
- D. mysqlbackup --apply-log
Answer: A,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 # 168
Which two features are offered by MySQL Enterprise Authentication?
- A. Automatic database backups
- B. Monitoring database performance
- C. Support for multi-factor authentication (MFA)
- D. Integration with LDAP for external authentication
Answer: C,D
Explanation:
MySQL Enterprise Authentication integrates with external authentication systems such as LDAP and Active Directory and also supports multi-factor authentication (MFA) for enhanced security, ensuring users are authenticated through multiple verification methods.
NEW QUESTION # 169
Which datatype is best suited for storing large text documents in MySQL?
- A. TEXT
- B. ENUM
- C. CHAR
- D. BLOB
Answer: A
Explanation:
The TEXT datatype is used to store large text strings, such as paragraphs or documents. It can store up to 65,535 characters.
NEW QUESTION # 170
What does the WITH GRANT OPTION clause do in a GRANT statement?
- A. It allows a user to modify their own privileges
- B. It grants all privileges to a user
- C. It grants a user the ability to pass on their privileges to others
- D. It removes all privileges from the user
Answer: C
Explanation:
The WITH GRANT OPTION clause allows a user to pass on any privileges they have been granted to other users.
NEW QUESTION # 171
Which MySQL backup utility is commonly used for logical backups of databases?
- A. mysqlbinlog
- B. mysqlbackup
- C. mysqladmin
- D. mysqldump
Answer: D
Explanation:
mysqldump is a utility used for logical backups, exporting the data and schema of databases as SQL statements. It is useful for smaller databases or when portability is required.
NEW QUESTION # 172
Which of the following is a key advantage of using MySQL Enterprise Backup over the mysqldump utility?
- A. It provides better error reporting
- B. It performs faster logical backups
- C. It supports incremental and compressed backups
- D. It improves database performance during backups
Answer: C
Explanation:
MySQL Enterprise Backup supports incremental and compressed backups, which reduce storage requirements and improve efficiency compared to mysqldump, which is typically used for full logical backups.
NEW QUESTION # 173
Which tool would you use to monitor SQL query execution and track suspicious database activity?
- A. MySQL Enterprise Firewall
- B. MySQL Enterprise Monitor
Answer: A
Explanation:
MySQL Enterprise Firewall is designed to monitor SQL query execution and block any suspicious activity or unauthorized queries, providing real-time protection against SQL injection and other database attacks.
NEW QUESTION # 174
Which of the following is not a feature included in the MySQL Community Edition?
- A. Performance Schema
- B. InnoDB Storage Engine
- C. MySQL Enterprise Audit
- D. MySQL Replication
Answer: C
Explanation:
MySQL Enterprise Audit, which provides detailed auditing capabilities to track database activities and maintain compliance, is only available in the Enterprise Edition. Other features like Performance Schema, InnoDB, and Replication are included in both editions.
NEW QUESTION # 175
What is the main limitation of asynchronous replication in MySQL?
- A. It has a higher latency than synchronous replication
- B. It can result in data loss if the primary server crashes before the replicas receive the changes
- C. It requires all replicas to acknowledge each transaction
- D. It only works with InnoDB tables
Answer: B
Explanation:
The primary limitation of asynchronous replication is the potential for data loss. If the primary server crashes before the replicas have received the changes, those changes may be lost.
NEW QUESTION # 176
What is the function of the --apply-log option in the mysqlbackup command?
- A. To start a full backup
- B. To prepare a backup for restoration by applying changes from log files
- C. To apply binary log changes after a backup
- D. To delete old backup files
Answer: B
Explanation:
The --apply-log option in the mysqlbackup command prepares the backup for restoration by applying the changes from the InnoDB log files to ensure the data is consistent and ready to be restored.
NEW QUESTION # 177
How is data loaded from MySQL into the HeatWave Cluster for in-memory analytics?
- A. Through the HeatWave Data Manager
- B. By exporting data to an external disk
- C. Using replication
- D. Through backup and restore
Answer: A
Explanation:
The HeatWave Data Manager is responsible for moving data from MySQL to the HeatWave Cluster for in-memory analytics. It optimizes data placement to improve query execution performance.
NEW QUESTION # 178
Which type of replication is typically used in a MySQL InnoDB Cluster for high availability and fault tolerance?
- A. Group replication
- B. Asynchronous replication
- C. Multi-source replication
- D. Semi-synchronous replication
Answer: A
Explanation:
Group replication is the default replication method used in a MySQL InnoDB Cluster. It provides fault tolerance and high availability by replicating transactions to all nodes and handling automatic failover in case of node failure.
NEW QUESTION # 179
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. thread_cache_size
- D. max_threads
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 # 180
Which of the following is not a valid storage engine in MySQL?
- A. MyISAM
- B. NDB
- C. InnoDB
- D. Redis
Answer: D
Explanation:
Redis is a separate database technology, not a MySQL storage engine. InnoDB, MyISAM, and NDB are all valid storage engines supported by MySQL.
NEW QUESTION # 181
Which component of MySQL is responsible for parsing SQL queries and generating an execution plan?
- A. Storage Engine
- B. MySQL Server
- C. Query Optimizer
- D. Information Schema
Answer: C
Explanation:
The Query Optimizer in MySQL is responsible for parsing SQL queries and generating an optimal execution plan for retrieving or modifying data. It decides the best way to execute a query based on available indexes, table statistics, and other factors.
NEW QUESTION # 182
Which datatype is the best choice for storing binary large objects (BLOBs), such as images or files?
- A. TEXT
- B. INT
- C. ENUM
- D. BLOB
Answer: D
Explanation:
The BLOB datatype is designed to store binary large objects, such as images, audio files, or other multimedia content.
NEW QUESTION # 183
Which of the following MySQL components ensures data integrity by providing crash recovery and transaction support?
- A. Performance Schema
- B. InnoDB Storage Engine
- C. Query Cache
- D. MySQL Replication
Answer: B
Explanation:
The InnoDB Storage Engine ensures data integrity by providing transaction support and crash recovery features. It uses transaction logs to recover data in case of a crash and ensures ACID compliance for data integrity.
NEW QUESTION # 184
Which MySQL command is used to monitor the health of InnoDB by displaying transaction information, lock details, and buffer pool statistics?
- A. SHOW ENGINE INNODB STATUS;
- B. SHOW STATUS;
- C. SHOW PROCESSLIST;
- D. SHOW VARIABLES;
Answer: A
Explanation:
The SHOW ENGINE INNODB STATUS; command provides detailed information about InnoDB transactions, locks, buffer pool statistics, and performance metrics, helping administrators to monitor InnoDB health and optimize performance.
NEW QUESTION # 185
How does MySQL InnoDB Cluster ensure data consistency across all nodes?
- A. By using statement-based replication
- B. By optimizing query execution times
- C. By performing asynchronous replication
- D. By using Group Replication with quorum-based voting
Answer: D
Explanation:
MySQL InnoDB Cluster ensures data consistency through Group Replication with quorum-based voting, where the majority of nodes must agree on a transaction before it is committed. This prevents conflicting data and maintains consistency across the cluster.
NEW QUESTION # 186
What happens in a MySQL InnoDB Cluster if the primary node fails and no quorum is reached?
- A. Replication switches to asynchronous mode
- B. All nodes are automatically restored
- C. The next available node is promoted to primary
- D. The cluster stops processing transactions
Answer: D
Explanation:
If no quorum is reached in a MySQL InnoDB Cluster, the cluster cannot process transactions until a majority of nodes agree on the promotion of a new primary, ensuring data consistency and avoiding split- brain scenarios.
NEW QUESTION # 187
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