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Oracle 1Z0-921 (MySQL 2021 Implementation Essentials) Certification Exam is an entry-level certification exam designed for individuals who want to demonstrate their knowledge and skills in implementing and managing MySQL databases. 1Z1-921 exam covers a wide range of topics, including database design, installation and configuration, security, backup and recovery, and performance tuning.
NEW QUESTION # 25
Which query will find rows in a table that have no counterpart in another table?
- A. SELECT left_tbl.*FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id=right_tbl.idWHERE right_tbl.id IS NULL;
- B. SELECT t1.name, t2.name2FROM employee t1 INNER JOIN info t2 WHERE t1.name=t2.name;
- C. SELECT *FROM table1 INNER JOIN table2 ON table1.id=table2.id WHERE table1.id=! table2.id;
- D. SELECT t1.name, t2.name2FROM employee AS t1 INNER JOIN info AS t2 ON t1.name= t2.name2;
Answer: A
NEW QUESTION # 26
You want to create an encrypted table. So, you enter this command:
CREATE TABLE 'test_encryption2% (
'id' int(10) unsigned NOT NULL AUTO_INCREMENT,
'server_name' varchar(15) NOT NULL,
PRIMARY KEY ('id') ) ENGINE=MYISAM AUTO_INCREMENT=l DEFAULT CHARSET=latin1 ENCRYPTION = 'Y1; You receive the following error:
ERROR 1031 (HY000): Table storage engine for 'test_encryption2' doesn't have this option Which statement correctly explains the reason for this error?
- A. The encryption feature only works with InnoDB tables. You are creating a MylSAM table, and it is causing the error.
- B. The test_encryption2 already exist. You are not using the correct option to recreate it and it is causing the error.
- C. You cannot use the AUTO_INCREMENT option to create an encrypted table. This is what is causing the error.
- D. The term "server_name" is a reserved MySQL term. You cannot use it for the new table. This is what is causing the error.
Answer: A
NEW QUESTION # 27
When should you perform a backup in a MySQL database?
Response:
- A. After every successful query execution.
- B. Only during scheduled maintenance windows.
- C. After critical data updates or before making significant changes to the database.
- D. Only when the database size exceeds a certain limit.
Answer: C
NEW QUESTION # 28
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 # 29
What are Security Lists in Oracle Cloud Infrastructure?
- A. They are user-role designations that assign rights to certain internal users and external users.
- B. They allow administrators access to applications in the cloud and external servers.
- C. Security lists are data encryption levels that control who can see the data.
- D. They contain rules established by HIPAA for securing end-user data.
- E. They are essentially firewall rules that help control traffic between OCI instances.
Answer: E
NEW QUESTION # 30
You just installed MySQL by Using a Package Manager on Linux.
Where are the default InnoDB redo log files stored?
- A. /usr/bin/logs
- B. /usr/mysql
- C. /etc/my.cnf
- D. /var/lib/mysql
- E. /usr/redo
- F. /var/lib/mysql/innodb
Answer: E
NEW QUESTION # 31
What SQL keyword must be specified when creating a foreign key constraint?
- A. unique PRIMARY key values for both child and parent tables
- B. a TRIGGER on the child table for cascading delete statements
- C. a REFERENCES in the child table to the parent table
- D. the SET_FOREGIN variable in the my .cnf file
- E. an index on the foreign key
Answer: B
NEW QUESTION # 32
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. Both Cloud storage and local storage
- B. Cloud storage only
- C. Flash-archive recovery area
- D. Cloud tape library
Answer: A,B
NEW QUESTION # 33
You want to change the default behavior of MySQL Enterprise Monitor (MEM). New instances detected by a MEM agent should automatically monitor discovered instances.
How can you change the Advisor Setting?
- A. Go to the configuration section (Advisors) and edit the default settings of the MySQL Process Discovery according to the existing users of your new MySQL instances.
- B. Go to the configuration section (Users) and create a new user according to the existing users of your new MySQL instances.
- C. Go to the configuration section (MEM) and configure the default login credentials.
- D. Go to the configuration section (Advisors) and create a new advisor rule for new MySQL instances based on the MySQL Advisor Wizard.
Answer: A
NEW QUESTION # 34
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. SET GLOBAL force_password_complex_policy=0;
- B. Add validate_password_policy=,new level, in the [mysqld] section of the MySQL configuration file.
- C. Add validate_password=,new level, in the [security] section of the MySQL configuration file.
- D. SET GLOBAL validate_password_policy=,new level,;
Answer: B,D
NEW QUESTION # 35
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. Specific data access: the rights to view specific types of potentially sensitive data
- C. MySQL Enterprise Operations: the right to start/stop/restart/update MySQL Enterprise Monitor Services
- D. Application administration: the rights to view or change the MySQL Enterprise Monitor configuration
- E. Asset visibility: the rights to access data collected from hosts or MySQL instances
Answer: B,D,E
NEW QUESTION # 36
Which two statements about the download of MySQL Enterprise Backup are correct?
- A. MySQL Enterprise Backup can be downloaded from My Oracle Support (MOS).
- B. MySQL Enterprise Backup comes with MySQL Utilities Package, which is available for download publicly on http://www.mysql.com.
- C. MySQL Enterprise Backup comes with MySQL Connector and is freely available for download.
- D. MySQL Enterprise Backup comes with all MySQL editions including community edition.
- E. MySQL Enterprise Backup is a separate package from MySQL Enterprise Edition. It can be downloaded from https://edelivery.oracle.com.
Answer: D,E
NEW QUESTION # 37
Which statement would you use to remove the population column from the city table?
- A. ALTER TABLE city DELETE population;
- B. DELETE population FROM city;
- C. DROP population FROM city;
- D. ALTER TABLE city LESS population;
- E. ALTER TABLE city DROP population;
Answer: E
NEW QUESTION # 38
What is Kubernetes in the context of MySQL?
Response:
- A. A database management tool for MySQL.
- B. An open-source container orchestration platform.
- C. A database engine for MySQL.
- D. A cloud service provided by Oracle for MySQL databases.
Answer: B
NEW QUESTION # 39
Which features of MySQL Enterprise Edition should you use to proactively monitor and track data changes in your databases?
- A. MySQL Audit and MySQL Workbench
- B. MySQL Workbench and MySQL Enterprise Firewall
- C. MySQL Enterprise Monitor and MySQL Audit
- D. SQL Enterprise Monitor and MySQL Enterprise Authentication
Answer: D
NEW QUESTION # 40
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 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.
- 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 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.
- 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 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.
- 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 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.
Answer: C
NEW QUESTION # 41
An Oracle Cloud Infrastructure customer already has many database instances configured and running in the cloud; however, they are reporting that they are unable to create any more instances.
What could be the problem?
- A. The customer account might have reached resource quota/limits.
- B. The customer has not kept up with their patching requirements; new instances cannot be created unless the majority or the template of existing instances are up-to-date.
- C. The customer reached the database instance limit of 32.
- D. The customer does not have proper user rights.
Answer: C
NEW QUESTION # 42
You establish MySQL Enterprise Server on Oracle Cloud Infrastructure connection via Secure Shell (SSH) For accessing a new MySQL Enterprise Edition on an Oracle Cloud Infrastructure (OCI) Instance you " Add SSH key " information during the OCI instance setup. You want to use Putty from your Windows Client to install MySQL.
What are the correct steps to accomplish this?
- A. Convert the private key to ppk format first and use the new private key for authentication.
- B. Open Port 22 on your OCI Instance and convert the private key to ppk format. This new private key can be used for authentication.
- C. Open Port 22 on your OCI Instance and configure Putty with the ssh private key.
- D. Use the provided private key for authentication.
Answer: B
NEW QUESTION # 43
Which three are requirements for MySQL Group Replication (GR)?
- A. Primary keys are required on every replicated table.
- B. The binary log format must be set to mixed.
- C. Data to be replicated must be stored in the InnoDB transactional storage engine.
- D. The use of global transaction identifiers is required.
- E. GR only works with MySQL versions 8.0.12 or higher.
- F. The minimum number of required nodes for achieving a consensus is two.
Answer: A,B,C
NEW QUESTION # 44
Which MySQL command is used to grant specific privileges to a user on a database?
Response:
- A. GRANT
- B. SET PRIVILEGES
- C. GIVE ACCESS
- D. GRANT PERMISSIONS
Answer: A
NEW QUESTION # 45
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Oracle 1Z0-921 (MySQL 2021 Implementation Essentials) Certification Exam is designed for individuals who are interested in validating their knowledge and skills in MySQL database implementation. MySQL 2021 Implementation Essentials certification exam is intended for database administrators, developers, and other IT professionals who are responsible for managing and maintaining MySQL databases. It is an entry-level certification exam that confirms the candidate's proficiency in basic MySQL concepts and implementation tasks.
1Z1-921 Certification All-in-One Exam Guide Apr-2025: https://testinsides.actualpdf.com/1Z1-921-real-questions.html
