1Z1-922 Exam Study Guide Free Practice Test LAST UPDATED DATE Oct 18, 2025
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NEW QUESTION # 186
Which MySQL datatype would be most appropriate for storing a social security number?
- A. DECIMAL
- B. FLOAT
- C. INT
- D. VARCHAR
Answer: D
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 # 187
What is the default index type used by MySQL for PRIMARY KEY columns?
- A. FULLTEXT
- B. BTREE
- C. HASH
- D. SPATIAL
Answer: B
Explanation:
BTREE is the default index type used for PRIMARY KEY columns in MySQL. BTREE indexing is optimized for searching, sorting, and range queries.
NEW QUESTION # 188
Which MySQL command is used to delete a table from a database?
- A. TRUNCATE TABLE
- B. DROP TABLE
- C. DELETE TABLE
- D. REMOVE TABLE
Answer: B
Explanation:
The DROP TABLE command is used to permanently delete a table and its data from the database.
NEW QUESTION # 189
Which two features are key benefits of the MySQL Performance Schema?
- A. Detailed transaction logs
- B. Real-time monitoring of wait events
- C. Tracking resource usage (CPU, memory, disk)
- D. Query caching
Answer: B,C
Explanation:
MySQL Performance Schema provides real-time monitoring of wait events and tracks resource usage such as CPU, memory, and disk I/O. These features help administrators pinpoint performance bottlenecks and optimize system resources.
NEW QUESTION # 190
Which type of backup should be used to ensure the database can be restored to a specific point in time?
- A. Incremental backup
- B. Binary log backup
- C. Logical backup
- D. Full backup
Answer: B
Explanation:
Binary log backups allow for point-in-time recovery by restoring the database to the state it was in at a specific time. This is done by applying the changes recorded in the binary logs after a full or incremental backup is restored.
NEW QUESTION # 191
Which MySQL tool supports multi-factor authentication (MFA) to strengthen user access security?
- A. MySQL Enterprise Backup
- B. MySQL Enterprise Authentication
- C. MySQL Enterprise Firewall
- D. MySQL Enterprise Monitor
Answer: B
Explanation:
MySQL Enterprise Authentication supports multi-factor authentication (MFA), which adds an additional layer of security by requiring users to provide multiple forms of verification to access the database.
NEW QUESTION # 192
Which SQL keyword is used to combine results from multiple queries into a single result set, removing duplicates?
- A. MERGE
- B. JOIN
- C. UNION
- D. INTERSECT
Answer: C
Explanation:
The UNION keyword is used to combine the result sets of two or more SELECT queries into a single result set, removing any duplicate rows.
NEW QUESTION # 193
Which datatype should be used to store date and time information in MySQL?
- A. TIMESTAMP
- B. All of the above
- C. DATE
- D. DATETIME
Answer: B
Explanation:
MySQL provides several datatypes for handling date and time information, including DATE (for date only), DATETIME (for both date and time), and TIMESTAMP (for automatic timezone adjustments).
NEW QUESTION # 194
What does the InnoDB redo log store in MySQL?
- A. Binary logs for replication
- B. executed SELECT statements
- C. Completed transaction history All
- D. Uncommitted transaction data
Answer: D
Explanation:
The InnoDB redo log stores uncommitted transaction data to ensure that, in the event of a crash, transactions can be recovered and either committed or rolled back. This is part of ensuring durability in the ACID properties.
NEW QUESTION # 195
In MySQL Group Replication, how is data consistency maintained across all members?
- A. quorum before committing transactions By allowing all
- B. binary logs to every member
- C. By using asynchronous replication By requiring a
- D. nodes to apply changes independently By copying all
Answer: A
Explanation:
MySQL Group Replication ensures data consistency by requiring a quorum (a majority of nodes) to agree before committing transactions. This prevents conflicting changes and ensures consistency across all members.
NEW QUESTION # 196
Which of the following is not a valid storage engine in MySQL?
- A. MyISAM
- B. Redis
- C. NDB
- D. InnoDB
Answer: B
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 # 197
Which of the following is a key benefit of MySQL Group Replication?
- A. It uses binary logs for faster backups
- B. It requires no configuration changes
- C. It provides automatic failover and high availability
- D. It allows multi-source replication
Answer: C
Explanation:
MySQL Group Replication provides high availability by enabling automatic failover. If a primary node fails, another node in the group can take over without manual intervention.
NEW QUESTION # 198
Which MySQL Enterprise Security Tool can help prevent SQL injection attacks by analyzing and blocking suspicious queries?
- A. MySQL Enterprise Audit
- B. MySQL Enterprise Backup
- C. MySQL Enterprise Firewall
- D. MySQL Enterprise Authentication
Answer: C
Explanation:
MySQL Enterprise Firewall helps prevent SQL injection attacks by analyzing incoming queries and blocking those that appear suspicious or unauthorized. It learns legitimate query patterns over time and protects the database from malicious SQL queries.
NEW QUESTION # 199
How does MySQL handle database transactions with the InnoDB storage engine?
- A. By storing transactions in the binary log
- B. Through table-level locking
- C. Using the two-phase commit protocol
- D. Using row-level locking and ACID properties
Answer: D
Explanation:
InnoDB supports transactions using row-level locking, ensuring ACID properties (Atomicity, Consistency, Isolation, Durability) for reliable database transactions.
NEW QUESTION # 200
How does HeatWave improve the performance of MySQL Database Service for analytical queries?
- A. By compressing data before processing
- B. By caching queries on disk
- C. By reducing the replication overhead
- D. By parallelizing query execution across multiple nodes
Answer: D
Explanation:
HeatWave improves the performance of analytical queries by parallelizing query execution across multiple HeatWave nodes. This allows complex queries to be processed faster by dividing the workload across several in-memory nodes.
NEW QUESTION # 201
Which two components are part of the MySQL architecture?
- A. Storage Engine Layer
- B. Data Dictionary
- C. Backup Scheduler
- D. SQL Parser
Answer: A,D
Explanation:
The SQL Parser and the Storage Engine Layer are key components of the MySQL architecture. The SQL Parser translates SQL queries into execution plans, while the Storage Engine Layer manages how data is stored and retrieved.
NEW QUESTION # 202
Which privilege is required to grant privileges to other users?
- A. UPDATE
- B. SELECT
- C. GRANT OPTION
- D. INSERT
Answer: C
Explanation:
The GRANT OPTION privilege allows a user to grant the privileges they have to other users.
NEW QUESTION # 203
Which MySQL Enterprise Edition feature allows you to control database access and permissions at a granular level?
- A. MySQL Enterprise Audit
- B. MySQL Replication
- C. MySQL Role-based Access Control (RBAC)
- D. MySQL Workbench
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 # 204
Which MySQL datatype is ideal for storing fixed-length strings?
- A. ENUM
- B. TEXT
- C. VARCHAR
- D. CHAR
Answer: D
Explanation:
CHAR is ideal for storing fixed-length strings. It always uses the same amount of space, padding shorter strings with spaces.
NEW QUESTION # 205
Which MySQL replication feature allows you to replicate data from multiple databases on different primary servers to a single replica?
- A. Multi-source replication
- B. Circular replication
- C. Multi-primary replication
- D. Primary-replica replication
Answer: A
Explanation:
Multi-source replication allows a single replica to receive data from multiple primary servers, even if they have different databases. This feature is useful for consolidating data from multiple databases.
NEW QUESTION # 206
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 Router, MySQL Query Optimizer, and MySQL Admin
- D. MySQL Enterprise Backup, MySQL Replication, and MySQL Query Cache
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 # 207
Which feature allows MySQL Enterprise Authentication to enforce password policies?
- A. Query optimization
- B. Transactional replication
- C. Data encryption
- D. Password expiration and history
Answer: D
Explanation:
MySQL Enterprise Authentication supports password policies, including enforcing password complexity, expiration, and history, which improves security by ensuring strong authentication credentials.
NEW QUESTION # 208
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