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NEW QUESTION # 113
Which MySQL backup type requires less storage space and is faster because it backs up only the changed data since the last backup?
- A. Logical backup
- B. Cold backup
- C. Incremental backup
- D. Full backup
Answer: C
Explanation:
An incremental backup backs up only the data that has changed since the last backup (either full or incremental), reducing storage space and speeding up the backup process, especially for large databases.
NEW QUESTION # 114
What does the VARCHAR datatype represent in MySQL?
- A. A binary data type
- B. A numeric datatype
- C. A variable-length string
- D. A fixed-length string
Answer: C
Explanation:
VARCHAR is a variable-length string datatype, meaning it only uses as much storage as necessary to store the actual value, up to the defined limit.
NEW QUESTION # 115
Which MySQL Enterprise feature helps with real-time query blocking to protect against SQL injection attacks?
- A. MySQL InnoDB Cluster
- B. MySQL Enterprise Firewall
- C. MySQL Enterprise Monitor
- D. MySQL Query Cache
Answer: B
Explanation:
MySQL Enterprise Firewall monitors and blocks SQL queries in real-time, preventing unauthorized database access and SQL injection attacks.
NEW QUESTION # 116
What type of data does MySQL Enterprise Audit collect?
- A. User activity logs
- B. Backup metadata
- C. Data on query performance
- D. Replication lag statistics
Answer: A
Explanation:
MySQL Enterprise Audit collects detailed logs of user activities, including login attempts and database queries, providing a comprehensive audit trail for security and compliance purposes.
NEW QUESTION # 117
Which of the following is a core requirement for setting up a MySQL InnoDB Cluster?
- A. Full-text indexing must be active
- B. Query caching must be turned off
- C. Binary log and GTID must be enabled
- D. Only one node can act as a primary
Answer: C
Explanation:
A core requirement for setting up a MySQL InnoDB Cluster is that binary logs and Global Transaction Identifiers (GTIDs) must be enabled. These are necessary for tracking and applying transactions consistently across all nodes in the cluster.
NEW QUESTION # 118
Which MySQL datatype would be most appropriate for storing a social security number?
- A. INT
- B. DECIMAL
- C. VARCHAR
- D. FLOAT
Answer: C
Explanation:
VARCHAR is the best datatype for storing a social security number because it often contains non- numeric characters such as hyphens, and the number itself is not used in calculations.
NEW QUESTION # 119
Which two settings can be configured in my.cnf to optimize the performance of MySQL?
- A. query_cache_size
- B. innodb_buffer_pool_size
- C. max_connections
- D. binlog_format
Answer: B,C
Explanation:
innodb_buffer_pool_size optimizes data caching, and max_connections helps handle concurrent connections, both critical for performance tuning. binlog_format is related to replication, not performance.
NEW QUESTION # 120
Which component of MySQL helps detect and block unauthorized SQL queries?
- A. MySQL Enterprise Backup
- B. MySQL Enterprise Firewall
- C. MySQL Enterprise Monitor
- D. MySQL Query Optimizer
Answer: B
Explanation:
MySQL Enterprise Firewall analyzes incoming SQL queries and blocks any that are identified as potentially harmful or unauthorized, such as SQL injection attempts. It learns from legitimate traffic to build an allowlist of acceptable queries.
NEW QUESTION # 121
Which of the following describes the architecture of HeatWave Cluster in MySQL Database Service (MDS)?
- A. HeatWave clusters only support a single database instance
- B. HeatWave replicates transactional workloads across regions
- C. HeatWave processes analytic workloads by using in-memory distributed nodes
- D. HeatWave provides on-disk query optimization
Answer: C
Explanation:
HeatWave is designed to process analytical workloads using in-memory distributed nodes, which execute queries in parallel across multiple nodes, optimizing performance for large-scale analytics.
NEW QUESTION # 122
Which command is used to restart the MySQL server on a Linux system?
- A. systemctl restart mysqld
- B. systemctl restart mysql-server
- C. mysql restart
- D. service mysqld restart
Answer: A
Explanation:
To restart the MySQL server on a Linux system, you would use the systemctl restart mysqld command.
NEW QUESTION # 123
Which of the following is a typical use case for performing incremental backups in MySQL?
- A. To reduce the amount of data that needs to be backed up by saving only the changes since the last backup
- B. To back up only the schema of the database
- C. To store backups on the local server
- D. To back up a read-only database
Answer: A
Explanation:
Incremental backups save only the data changes made since the last full or incremental backup, which helps reduce backup time and storage requirements, especially for large or frequently updated databases.
NEW QUESTION # 124
What is the primary difference between HeatWave and standard MySQL query execution?
- A. HeatWave caches all queries in memory
- B. HeatWave provides backup and recovery features
- C. HeatWave executes analytical queries in memory for faster results
- D. HeatWave handles transactional queries with higher consistency
Answer: C
Explanation:
The primary difference is that HeatWave executes analytical queries in memory, allowing for significantly faster processing compared to standard MySQL, which relies on disk-based query execution.
NEW QUESTION # 125
Which of the following actions can MySQL Enterprise Audit log for compliance purposes?
- A. All of the above
- B. Changes to database schemas
- C. User login attempts
- D. Execution of specific SQL queries
Answer: A
Explanation:
MySQL Enterprise Audit logs user activities, including login attempts, schema changes, and SQL query executions, ensuring a detailed audit trail that supports compliance with security standards like GDPR or HIPAA.
NEW QUESTION # 126
In a MySQL InnoDB Cluster, what is a quorum and why is it important?
- A. It is a set of SQL queries used for replication
- B. It is a majority of nodes needed to commit a transaction
- C. It is the process of manually promoting a replica
- 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 # 127
Which MySQL security tool is designed to track and log access to database systems for compliance purposes?
- A. MySQL Enterprise Authentication
- B. MySQL Enterprise Backup
- C. MySQL Query Cache
- D. MySQL Enterprise Audit
Answer: D
Explanation:
MySQL Enterprise Audit is used to log and track access to database systems, including user login attempts and queries, which helps organizations comply with regulatory requirements like GDPR and HIPAA.
NEW QUESTION # 128
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