Online Questions - Valid Practice To your 1Z1-922 Exam (Updated 360 Questions)
Practice To 1Z1-922 - Remarkable Practice On your MySQL Implementation Associate Exam
NEW QUESTION # 142
What does the WITH GRANT OPTION clause in a MySQL GRANT statement enable a user to do?
- A. Automatically revoke privileges when a user disconnects
- B. Execute queries with elevated privileges
- C. Create and modify new databases
- D. Grant their privileges to other users
Answer: D
Explanation:
The WITH GRANT OPTION clause allows users to pass on their granted privileges to other users. It essentially enables users with certain privileges to share those privileges without the need for direct intervention by an administrator.
NEW QUESTION # 143
Which InnoDB parameter controls the frequency of disk flushes to ensure data durability?
- A. innodb_flush_method
- B. innodb_log_file_size
- C. innodb_flush_log_at_trx_commit
- D. innodb_max_dirty_pages_pct
Answer: C
Explanation:
The innodb_flush_log_at_trx_commit parameter controls how often the InnoDB log is flushed to disk. Setting it to 1 ensures that logs are flushed after every transaction commit, ensuring data durability.
NEW QUESTION # 144
In a MySQL InnoDB Cluster, what is a quorum and why is it important?
- A. It is the process of manually promoting a replica
- B. It is a majority of nodes needed to commit a transaction
- C. It is a set of SQL queries used for replication
- D. It is a backup system for the cluster
Answer: B
Explanation:
A quorum in MySQL InnoDB Cluster refers to the majority of nodes that must agree on committing a transaction to ensure consistency and avoid split-brain scenarios. It is crucial for maintaining data integrity in the cluster.
NEW QUESTION # 145
In a MySQL InnoDB Cluster, what happens when a node becomes unreachable?
- A. All write operations are blocked
- B. The node is automatically demoted to a replica
- C. The cluster stops all transactions until the node recovers
- D. The remaining nodes continue to operate, and the cluster self-heals when the node recovers
Answer: D
Explanation:
If a node in a MySQL InnoDB Cluster becomes unreachable, the remaining nodes continue to operate, and the cluster adjusts by removing the failed node from the group. When the node recovers, it rejoins the cluster and synchronizes its data.
NEW QUESTION # 146
Which index type should be used if you need to perform geospatial searches in MySQL?
- A. FULLTEXT
- B. SPATIAL
- C. BTREE
- D. HASH
Answer: B
Explanation:
SPATIAL indexes are used in MySQL for geospatial data and queries. They support efficient indexing and querying of spatial objects such as points, lines, and polygons.
NEW QUESTION # 147
Which isolation level should be used to prevent dirty reads but allow non-repeatable reads?
- A. REPEATABLE READ
- B. SERIALIZABLE
- C. READ UNCOMMITTED
- D. READ COMMITTED
Answer: D
Explanation:
READ COMMITTED prevents dirty reads, meaning transactions cannot see uncommitted data from other transactions. However, it allows non-repeatable reads, meaning data might change if read multiple times within a transaction.
NEW QUESTION # 148
Which of the following MySQL security tools helps ensure compliance with data protection regulations like GDPR or HIPAA?
- A. MySQL Enterprise Monitor
- B. MySQL Enterprise Authentication
- C. MySQL Enterprise Backup
- D. MySQL Enterprise Audit
Answer: D
Explanation:
MySQL Enterprise Audit helps ensure compliance with data protection regulations such as GDPR or HIPAA by providing detailed logs of database activity, including user access, query execution, and schema changes. These logs can be used for audits and forensic analysis to verify that sensitive data is handled securely.
NEW QUESTION # 149
What does MySQL Enterprise Firewall use to decide whether to allow or block SQL queries?
- A. Query execution time
- B. Database size
- C. Predefined user roles
- D. A learned pattern of allowed SQL queries
Answer: D
Explanation:
MySQL Enterprise Firewall builds a list of allowed SQL query patterns by learning from legitimate queries during the learning phase. It then uses this allowlist to block any queries that deviate from the recognized patterns.
NEW QUESTION # 150
Which of the following is a valid MySQL replication topology?
- A. replication
- B. replication Cross-server
- C. Star replication Circular
- D. replication Multi-primary
Answer: B
Explanation:
Multi-primary replication (also known as multi-master replication) allows multiple servers to act as both a source and a replica, meaning they can accept updates and replicate changes to each other.
NEW QUESTION # 151
Which MySQL datatype should be used to store true or false values?
- A. BOOLEAN
- B. TINYINT
- C. VARCHAR
- D. ENUM
Answer: A
Explanation:
The BOOLEAN datatype is used to store true or false values in MySQL. Internally, it is stored as a TINYINT, with 0 representing false and 1 representing true.
NEW QUESTION # 152
Which of the following reduces disk I/O operations in MySQL?
- A. Enabling the general log
- B. Disabling binary logging
- C. Increasing the InnoDB buffer pool size
- D. Enabling the query cache
Answer: C
Explanation:
Increasing the size of the InnoDB buffer pool allows more data and index pages to be cached in memory, reducing the need for disk I/O operations.
NEW QUESTION # 153
Which MySQL replication topology is best suited for geographically distributed databases?
- A. Group replication
- B. Primary-replica replication
- C. Circular replication
- D. Multi-source replication
Answer: D
Explanation:
Multi-source replication allows a single replica to receive updates from multiple primary servers, which can be located in different geographic regions. This topology is useful for geographically distributed databases.
NEW QUESTION # 154
Which InnoDB parameter defines the maximum size of an individual InnoDB table?
- A. innodb_log_file_size
- B. innodb_buffer_pool_size
- C. innodb_data_file_size
- D. innodb_file_per_table
Answer: C
Explanation:
The innodb_data_file_size parameter sets the maximum size of the individual InnoDB tables when they are stored in the shared tablespace.
NEW QUESTION # 155
What is the purpose of the RELOAD privilege in MySQL?
- A. To grant privileges to other users
- B. To load new data into a table
- C. To reload privilege tables without restarting the server
- D. To restart the MySQL server
Answer: C
Explanation:
The RELOAD privilege allows a user to reload the MySQL privilege tables and flush logs without restarting the server. This is useful when updating user privileges or clearing logs without interrupting database service.
NEW QUESTION # 156
When setting up a MySQL Enterprise Server, which parameter in the my.cnf file controls the size of the InnoDB buffer pool?
- A. max_buffer_size
- B. innodb_buffer_pool_size
- C. innodb_log_buffer_size
- D. query_cache_size
Answer: B
Explanation:
The innodb_buffer_pool_size parameter in the my.cnf file specifies the size of the buffer pool in MySQL. A larger buffer pool size can improve performance by reducing disk I/O.
NEW QUESTION # 157
What is the default replication type in MySQL?
- A. Asynchronous replication
- B. Semi-synchronous replication
- C. Multi-source replication
- D. Synchronous replication
Answer: A
Explanation:
The default replication type in MySQL is asynchronous replication, where the primary server does not wait for confirmation from the replica before committing a transaction.
NEW QUESTION # 158
Which of the following SQL commands is blocked by default in MySQL Enterprise Firewall if it detects it as suspicious or unauthorized?
- A. DESCRIBE
- B. INSERT
- C. DROP DATABASE
- D. SELECT
Answer: C
Explanation:
MySQL Enterprise Firewall can block destructive SQL commands, such as DROP DATABASE, if these commands are not part of the normal query patterns learned by the firewall, preventing unauthorized database modification or deletion.
NEW QUESTION # 159
Which MySQL Enterprise Edition feature is used to detect and prevent SQL injection attacks?
- A. MySQL Enterprise Monitor
- B. MySQL InnoDB Cluster
- C. MySQL Enterprise Backup
- D. MySQL Enterprise Firewall
Answer: D
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 # 160
How does MySQL InnoDB Cluster ensure data consistency across all nodes?
- A. By using Group Replication with quorum-based voting
- B. By using statement-based replication
- C. By performing asynchronous replication
- D. By optimizing query execution times
Answer: A
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 # 161
Which of the following describes MySQL Enterprise Audit?
- A. A tool that tracks changes to database schemas
- B. A tool used to monitor replication lag across databases
- C. A utility for creating automated backups of MySQL databases
- D. A feature that logs all access to MySQL databases, including login attempts and query execution
Answer: D
Explanation:
MySQL Enterprise Audit tracks and logs all access to MySQL databases, including login attempts, SQL queries, and user activities. This logging helps organizations comply with data security regulations and ensures accountability.
NEW QUESTION # 162
What key advantage does MySQL Enterprise Edition offer over the Community Edition?
- A. Completely free for commercial use
- B. Advanced security features like encryption
- C. Faster query processing
- D. No need for a license
Answer: B
Explanation:
MySQL Enterprise Edition offers advanced security features such as data encryption, audit logging, and a firewall. These features help ensure compliance with industry regulations and protect sensitive data, which are not available in the Community Edition. The Community Edition is also free but lacks these advanced tools.
NEW QUESTION # 163
What is a logical backup in MySQL?
- A. A backup of the user privileges
- B. A backup of the binary logs
- C. A backup of the data directory
- D. A backup of the database structure and data as SQL statements
Answer: D
Explanation:
A logical backup involves exporting the database structure and data as SQL statements using tools like mysqldump. These backups are portable but can be slower and larger than physical backups.
NEW QUESTION # 164
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