Mar-2025 Oracle 1Z0-921 Actual Questions and 100% Cover Real Exam Questions [Q44-Q68]

Mar-2025 Oracle 1Z0-921 Actual Questions and 100% Cover Real Exam Questions

1Z0-921 Free Exam Questions and Answers PDF Updated on Mar-2025

Oracle 1Z0-921 (MySQL 2021 Implementation Essentials) Exam is a certification exam designed to test the knowledge and skills of database administrators and developers in implementing and managing MySQL databases. 1Z0-921 exam covers a wide range of topics, including database architecture, installation and configuration, backup and recovery, security, performance tuning, and troubleshooting. Passing 1Z0-921 exam demonstrates that a candidate has a strong understanding of MySQL and can effectively manage and maintain MySQL databases in a production environment.

The Oracle 1Z0-921 exam consists of 70 multiple-choice questions that must be completed within 105 minutes. The questions are designed to test the candidate's understanding of the MySQL database management system and its associated tools, including MySQL Workbench, MySQL Enterprise Monitor, and MySQL Shell. 1Z0-921 exam is available in English and Japanese, and candidates must achieve a score of at least 63% to pass.

 

NEW QUESTION # 44
You just installed MySQL by Using a Package Manager on Linux.
Where are the default InnoDB redo log files stored?

• A. /var/lib/mysql/innodb
• B. /var/lib/mysql
• C. /etc/my.cnf
• D. /usr/mysql
• E. /usr/redo
• F. /usr/bin/logs

Answer: E

NEW QUESTION # 45
Which three are recommended configurations for installing and running MySQL InnoDB Cluster?

• A. Networks must be in separate regions.
• B. use SSD,s for data and replication logs
• C. The number of machines per group must be 3, 5, 7 or 9.
• D. isolated machine resources
• E. Use Network-attached storage (NAS) for the data files.
• F. Groups must be in even numbers; 2, 4, 6, 8.
• G. smaller VM,s work best - with a maximum of eight vCPU,s and 16GB of RAM

Answer: C,E,F

NEW QUESTION # 46
Which three are levels in which MySQL Enterprise Monitor provides access control?

• A. MySQL Enterprise Operations: the right to deploy the necessary MySQL Enterprise Agent
• B. MySQL Enterprise Operations: the right to start/stop/restart/update MySQL Enterprise Monitor Services
• C. Asset visibility: the rights to access data collected from hosts or MySQL instances
• D. Specific data access: the rights to view specific types of potentially sensitive data
• E. Application administration: the rights to view or change the MySQL Enterprise Monitor configuration

Answer: C,D,E

NEW QUESTION # 47
Consider this SQL statement which is using the innoDB storage engine and with global AUTOCOMMIT = 1:

What is the result after issuing the rollback command?

• A. Both the tables, t1 and t2, are not created because there is an explicit ROLLBACK.
• B. Only the t1 table is created.
• C. Only the t2 table is created.
• D. Both the tables, t1 and t2, are created.

Answer: D

NEW QUESTION # 48
Which Oracle product is certified to work with MySQL Enterprise Edition?

• A. Oracle Enterprise Manager
• B. Oracle Enterprise Backup
• C. Oracle Application Express
• D. Oracle Data Pump

Answer: A

NEW QUESTION # 49
The MySQL Replication Environment (Master and Slave) is prepared.
What two are options for connecting a Java application to the MySQL Master and Slave?

• A.
• B.
• C.
• D.

Answer: B

NEW QUESTION # 50
You need to change the password level for a test system.
Which two allow to change this level before you create new test user/passwords?

• A. Add validate_password_policy=,new level, in the [mysqld] section of the MySQL configuration file.
• B. SET GLOBAL force_password_complex_policy=0;
• C. SET GLOBAL validate_password_policy=,new level,;
• D. Add validate_password=,new level, in the [security] section of the MySQL configuration file.

Answer: A,C

NEW QUESTION # 51
Which two statements are correct about MySQL Enterprise Edition?

• A. Oracle MySQL Enterprise tools & plugins are available as optional services (installation Feature Pack I/II).
• B. MySQL Enterprise Edition can be installed on an Oracle Cloud Infrastructure Compute Instance.
• C. MySQL Enterprise Product Suite can be installed on an Oracle Cloud Infrastructure Virtual Cloud Network.
• D. MySQL configuration can be changed in /etc/lib/myi.cnf.
• E. Oracle offers 24x7, global support for MySQL Enterprise Edition products installed on Oracle Cloud Infrastructure Compute Instances.

Answer: A,D

NEW QUESTION # 52
Which is a correct example of creating an Enterprise Encryption function?

• A. VALIDATE FUNCTION create_asymmetric_priv_key WITH ,openssl_udf.so';
• B. CREATE FUNCTION asymmetric_decrypt RETURNS STRING SONAME ,openss1_udf.so,;
• C. INSERT INTO t1 (key_co1) FUNCTION(CREATE_ASYMMETRIC_PRIV_KEY(,RSA,, 1024));
• D. SET @function = CREATE_ASYMMETRIC_PRIV_KEY(@algo, @key_len);

Answer: B

NEW QUESTION # 53
Which two methods help prevent MySQL security risks?

• A. Grant only permissions that a user requires.
• B. Use the secure installation script "mysql_alays_secure_installation".
• C. Ensure that MySQL accounts have short and easy passwords.
• D. Use a firewall to control access to MySQL ports.
• E. Allow unauthorized clients to connect to the server.
• F. Transmit plain (unencrypted) data over networks.

Answer: E,F

NEW QUESTION # 54
Which MySQL command is used to grant specific privileges to a user on a database?
Response:

• A. SET PRIVILEGES
• B. GRANT
• C. GIVE ACCESS
• D. GRANT PERMISSIONS

Answer: B

NEW QUESTION # 55
Which statement would you use to remove the population column from the city table?

• A. DROP population FROM city;
• B. ALTER TABLE city DROP population;
• C. ALTER TABLE city DELETE population;
• D. ALTER TABLE city LESS population;
• E. DELETE population FROM city;

Answer: B

NEW QUESTION # 56
What are the two main components required to set up persistent storage for MySQL on Kubernetes?
Response:

• A. PVC (Persistent Volume Claim) and PV (Persistent Volume)
• B. Secret and Deployment
• C. PVC (Persistent Volume Claim) and ConfigMap
• D. Pod and ReplicaSet

Answer: A

NEW QUESTION # 57
How does MySQL HeatWave improve query performance?
Response:

• A. By replicating data across multiple servers.
• B. By caching the entire database in memory.
• C. By automatically creating indexes on frequently used columns.
• D. By offloading analytics queries to an in-memory, highly parallel processing engine.

Answer: D

NEW QUESTION # 58
MySQL Enterprise Masking and De-identification can hide or obfuscate sensitive data, by controlling how the data appears. Which three are MySQL Enterprise Masking and De-identification functions?

• A. misspelling
• B. random data substitution
• C. dictionary substitution
• D. whitelisting and substitution
• E. strict or relaxed masking

Answer: B,C,E

NEW QUESTION # 59
Which features of MySQL Enterprise Edition should you use to proactively monitor and track data changes in your databases?

• A. SQL Enterprise Monitor and MySQL Enterprise Authentication
• B. MySQL Audit and MySQL Workbench
• C. MySQL Workbench and MySQL Enterprise Firewall
• D. MySQL Enterprise Monitor and MySQL Audit

Answer: A

NEW QUESTION # 60
When using an Oracle Cloud Infrastructure Compute Instance with MySQL Enterprise Edition installed, you have two choices for backup destinations. What are these two choices?

• A. Cloud tape library
• B. Cloud storage only
• C. Flash-archive recovery area
• D. Both Cloud storage and local storage

Answer: B,D

NEW QUESTION # 61
Which three are characteristics of the JSON data type?

• A. It is based on the TEXT data type.
• B. Key or array references enable quick read-access to look up document elements directly.
• C. It supports indexing directly against the JSON-defined column.
• D. It validates the JSON syntax on insert or merge.
• E. A set of SQL functions substantially support the SQL utilization of the data type.
• F. Comparisons of JSON values are not case-sensitive.

Answer: B,C,D

NEW QUESTION # 62
Which MySQL Enterprise Edition plug-in replaces real values with substitutes?

• A. MySQL Enterprise Scalability
• B. MySQL Enterprise Data Masking and De-identification
• C. MySQL Enterprise Audit
• D. MySQL Enterprise Transparent Data Encryption (TDE)
• E. MySQL Enterprise No-Login Authentication

Answer: B

NEW QUESTION # 63
You have a backup image file that is backed up using MySQL Enterprise Backup with the -compress option:
/home/mysq1/backup/full/mybackup/myimage. Img

You are required to perform a database restore to a new machine to provision the database. Which command can provision the new database in the datadir as /home/mysql/data/MEB?

• A.
• B.
• C.
• D.
• E.

Answer: B

NEW QUESTION # 64
You set up a compressed full backup file from mysqlbackup by using the --compress option for MySQL Database backup. You are required to restore the database and apply the log.
Which two options should you add to the mysqlbackup to achieve the restoration of the database?

• A. --uncompress-and-apply-log
• B. --copy-back-and-apply-log
• C. --decompress
• D. --uncompress
• E. --apply-log-and-copy-back

Answer: B,D

NEW QUESTION # 65
After installing MySQL 8.0, you initialize the data directory with the --initialize command. Which two are places where you can find the root password?

• A. The root password is not given and is blank. You must manually set the root password.
• B. The root_pw variable stored in the mysq1.install table.
• C. The root password inserted in the error log set by the --log-error=[file_name] variable
• D. As root, execute the show password command by using the SHA-256 password encryption plug-in.
• E. The root password displayed on the screen via a [warning] message.

Answer: B,D

NEW QUESTION # 66
What is true about MySQL Enterprise Transparent Data Encryption (TDE)?

• A. Encryption key is stored in a centralized key memory location
• B. Enables data-at-rest encryption by encrypting the physical files of the database.
• C. Tablespace keys are managed manually behind the scenes.
• D. Data is encrypted automatically, in real time, after it is written to storage.

Answer: B

NEW QUESTION # 67
You have three machines with MySQL Databases running on Linux platform.
Which backup procedures would allow online and remote backup of the MySQL Database on the three machines to a connected Storage NFS?

• A. 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on the machine that is used to start the backup.3. Start mysqlbackup on only one machine with the installation to back up the databases for the three machines to the mounted volume using - - backup-dir and by specifying -- config-files=my1.cnf, my2.cnf, my3.cnf.my1.cnf, my2cnf, and my3.cnf are the MySQL Database Configuration files on the three machines.4. Validate the backup by using the mysqlbackup program to ensure that the backup created is valid.
• B. 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Workbench on a separate machine, which is used to connect to the three machines to back up and restore.3. Startup MySQL backup from MySQL Workbench to back up the three databases.4. Validate the backup by using MySQL Workbench to ensure that the backup created is valid.
• C. 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on machine which is used to start the backup.3. Start mysqlbackup on only one machine with the installation to back up the databases for the three machines to the mounted volume using - -backup-dir and by giving--hosts=machine1:port1, machine2:port2, machine3:port3.4. Validate the backups using the mysqlbackup program to ensure that the backups created are valid.
• D. 1. Mount the Remote Storage NFS volume to each of the three machines with proper privilege for the backup OS user to have all access.2. Install MySQL Enterprise Backup on all three machines.3. Start mysqlbackup on all machines to back up the database to the mounted volume using - -backup-dir.4. Validate the backup using the mysqlbackup program to ensure that the backup created is valid.

Answer: D

NEW QUESTION # 68
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To pass the Oracle 1Z0-921 exam, you need to have a solid understanding of MySQL architecture, installation, configuration, backup and recovery, security, and performance tuning. You should also be able to troubleshoot common problems and optimize MySQL databases for maximum efficiency. By passing 1Z0-921 exam, you can demonstrate your proficiency in these areas and differentiate yourself as a MySQL expert in the job market. The Oracle 1Z0-921 certification can help you advance your career and increase your earning potential as a MySQL professional.

 

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