Valid 1Z0-922 Test Answers & Oracle 1Z0-922 Exam PDF
Oracle 1Z0-922 Certification Real 2026 Mock Exam
NEW QUESTION # 100
What is the main limitation of asynchronous replication in MySQL?
- A. It requires all replicas to acknowledge each transaction
- B. It only works with InnoDB tables
- C. It has a higher latency than synchronous replication
- D. It can result in data loss if the primary server crashes before the replicas receive the changes
Answer: D
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 # 101
Which backup method should you use to capture both the database structure and data for disaster recovery in MySQL?
- A. Binary log backup
- B. Incremental backup
- C. Full backup
- D. Logical backup using mysqldump
Answer: C
Explanation:
A full backup captures both the database structure and all data, providing a complete snapshot of the database at the time of the backup. This is essential for disaster recovery, as it ensures that you can restore the entire database from a single backup.
NEW QUESTION # 102
Which of the following is a valid MySQL replication topology?
- A. replication Cross-server
- B. replication Multi-primary
- C. Star replication Circular
- D. replication
Answer: A
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 # 103
Which type of buffering is provided by the InnoDB Buffer Pool?
- A. Data and index page buffering
- B. Binary log buffering
- C. Log buffer flushing
- D. Query result buffering
Answer: A
Explanation:
The InnoDB Buffer Pool caches frequently accessed data and index pages, reducing the need for disk I/O and improving query performance.
NEW QUESTION # 104
How can you track the slowest queries in MySQL?
- A. By using the Slow Query Log
- B. By using MySQL Enterprise Backup
- C. By monitoring the Error Log
- D. By enabling the Query Cache
Answer: A
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 # 105
Which datatype is the best choice for storing binary large objects (BLOBs), such as images or files?
- A. BLOB
- B. TEXT
- C. ENUM
- D. INT
Answer: A
Explanation:
The BLOB datatype is designed to store binary large objects, such as images, audio files, or other multimedia content.
NEW QUESTION # 106
Which two tables in the mysql system database store global and database-level privileges for users?
- A. columns_priv
- B. user
- C. tables_priv
- D. db
Answer: B,D
Explanation:
The user table in the mysql system database stores global privileges for each user. The db table stores database-level privileges, controlling access to specific databases. The tables_priv and columns_priv tables are used for table-level and column-level privileges, respectively.
NEW QUESTION # 107
Which command is used to add an index to an existing table in MySQL?
- A. INSERT INDEX
- B. ADD INDEX
- C. CREATE INDEX
- D. MODIFY INDEX
Answer: C
Explanation:
To add an index to an existing table, you use the CREATE INDEX command in MySQL.
NEW QUESTION # 108
Which components are essential for a MySQL InnoDB Cluster setup?
- A. MySQL Router, MySQL Server, and MySQL Shell
- B. MySQL Proxy, MySQL Firewall, and MySQL Router
- C. MySQL Enterprise Backup, MySQL Replication, and MySQL Query Cache
- D. MySQL Router, MySQL Query Optimizer, and MySQL Admin
Answer: A
Explanation:
A MySQL InnoDB Cluster setup includes three key components: MySQL Router (for routing client traffic), MySQL Server (for hosting the database), and MySQL Shell (for configuring and managing the cluster).
NEW QUESTION # 109
Which MySQL Enterprise Edition feature allows you to control database access and permissions at a granular level?
- A. MySQL Enterprise Audit
- B. MySQL Workbench
- C. MySQL Role-based Access Control (RBAC)
- D. MySQL Replication
Answer: C
Explanation:
MySQL Role-based Access Control (RBAC) allows for granular control of user permissions, making it easier to manage database security. It is an important feature of the Enterprise Edition for managing large-scale user access.
NEW QUESTION # 110
Which statement would you use to grant a user access to a specific database?
- A. GRANT SELECT, INSERT ON *.* TO 'user'@'host';
- B. GRANT ALL PRIVILEGES TO 'user';
- C. GRANT ALL PRIVILEGES ON database_name.* TO 'user'@'host';
- D. GRANT SELECT, INSERT ON database_name.* TO 'user'@'host';
Answer: D
Explanation:
The statement GRANT SELECT, INSERT ON database_name.* allows the specified user to perform SELECT and INSERT operations on all tables within the specified database. Granting privileges at the database level restricts access to only that database.
NEW QUESTION # 111
What is the purpose of the MySQL Buffer Pool in the InnoDB storage engine?
- A. It stores binary logs
- B. It performs backups of the database
- C. It manages user authentication
- D. It caches data and indexes to improve query performance
Answer: D
Explanation:
The Buffer Pool in InnoDB is a memory area where frequently accessed data and index pages are cached to improve query performance by reducing the need for disk I/O operations.
NEW QUESTION # 112
Which MySQL Enterprise Security Tool can log failed login attempts to detect potential attacks?
- A. MySQL Enterprise Firewall
- B. MySQL Enterprise Monitor
- C. MySQL Enterprise Audit
- D. MySQL Enterprise Authentication
Answer: C
Explanation:
MySQL Enterprise Audit logs failed login attempts, allowing administrators to track unauthorized access attempts and take necessary actions to secure the system.
NEW QUESTION # 113
Which of the following best describes the difference between logical and physical backups in MySQL?
- A. Logical backups export data as SQL statements, while physical backups copy the actual data files
- B. required for MyISAM, while physical backups are required for InnoDB
- C. Logical backups are faster, but physical backups are more space-efficient Logical backups are
- D. Logical backups copy the actual data files, while physical backups export data as SQL statements
Answer: A
Explanation:
Logical backups export the database as SQL statements (using tools like mysqldump), while physical backups copy the actual data files and logs (using tools like mysqlbackup). Physical backups are typically faster for large datasets but require more storage space.
NEW QUESTION # 114
Which of the following is not a feature included in the MySQL Community Edition?
- A. InnoDB Storage Engine
- B. Performance Schema
- 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 # 115
What is the main benefit of using the HeatWave Cluster in MySQL Database Service?
- A. Simplified database backups
- B. Real-time analytics on large datasets
- C. Enhanced query performance for OLTP workloads
- D. Improved transaction consistency
Answer: B
Explanation:
The main benefit of the HeatWave Cluster is its ability to provide real-time analytics on large datasets by processing queries in-memory, leading to faster query performance for analytical workloads.
NEW QUESTION # 116
What does the SELECT privilege allow a user to do in MySQL?
- A. Update existing records
- B. Read data from tables
- C. Insert new records
- D. Create new databases
Answer: B
Explanation:
The SELECT privilege allows users to retrieve or read data from tables. Users can run queries that fetch data, but they cannot modify, insert, or delete data unless they have the appropriate privileges.
NEW QUESTION # 117
What makes HeatWave particularly suitable for real-time analytics?
- A. It optimizes transactional queries for consistency
- B. It reduces the size of the binary logs
- C. It executes queries directly in memory, avoiding disk I/O
- D. It stores query results on disk for future use
Answer: C
Explanation:
HeatWave is suitable for real-time analytics because it processes queries in-memory, which eliminates the need for disk I/O, significantly reducing query execution time for large datasets.
NEW QUESTION # 118
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