Verified 1Z1-921 &As – Provide 1Z1-921 with Correct Answers [Q35-Q51]

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Verified 1Z1-921 Exam Dumps Q&As – Provide 1Z1-921 with Correct Answers

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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 1Z1-921 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.

NO.35 Which three statements describe MySQL Enterprise Backup?

MySQL Enterprise Backup can be used to import/export data from on-premises MySQL installations.

MySQL Enterprise Backup provides the point-in-time recovery functionality.

MySQL Enterprise Backup can be used to send backups to Oracle Cloud Infrastructure Storage Service.

MySQL Enterprise Backup offers backup based on Oracle RMAN with optimized row locking.

MySQL Enterprise Backup is an optimized backup based on mysqldump with optimized row locking.

NO.36 By using the asynchronous MySQL Replication architecture, data can be replicated to slaves. Identify three use cases of MySQL Replication.

MySQL Replication Connector/J (ReplicationDriver) is provided to allow read capability on slave and write capability on master.

MySQL Enterprise Backup will back up from Slave automatically.

It provides multi-master access where the application can write and read data across the database servers.

It allows backup to be done on the slave without impacting the master.

You can create a slave server for reporting applications, which get only read access to the slave servers. It off-loads the master server. Additional servers allow different database server configuration.

NO.37 Which of the following statements is true regarding MySQL user account privileges?
Response:

A user with the SUPER privilege can only read data from the database.

The GRANT option allows a user to revoke privileges from other users.

The USAGE privilege allows a user to connect to the MySQL server but grants no other privileges.

The RELOAD privilege allows a user to delete data from a table.

NO.38 How would you restrict a user Joe from accessing all MySQL database objects?

CREATE USER ,joe’@,0.0.0.0, SET Password=PASSWORD(,% ! %,)

REVOKE ALL PRIVILEGES, GRANT OPTION FROM ,joe,@,%,;

UPDATE mysql.user SET Password=PASSWORD(,Invalid,) WHERE User=,joe’;

Insert Joe,s name into the mysql.user_restriction cable, and issue the FLUSH PRIVILEGES command.

CREATE USER , joe,@1′ %’ DENY ALL PRIVILEGES

NO.39 An existing MySQL Database environment has been doing backup and restore in a logical way by using the mysq1dump and mysq1 client utilities. When the backup is started using mysqldump with single-transaction mode, the existing application has long wait time. When the restore is required, it takes more than three hours to restore.
What two are benefits of using mysqlbackup from MySQL Enterprise Backup in this situation?

MySQL Enterprise Backup does not back up system data so that it is much faster.

MySQL Enterprise Backup provides tape backup integration by default. It has the virtual tape option, which allows backup to tape device directly without extra third-party software integration.

mysqlbackup can back up tables with the InnoDB engine without blocking. The backup is hot with InnoDB. Together with Incremental Backup, mysqlbackup from MySQL Enterprise Backup shortens the backup windows.

mysqlbackup utilities dump the full database into a SQL file, which is imported into the mysql client in single-thread mode. mysqlbackup restores data from physical backups. Physical backup methods are faster than logical methods because they involve only file coping without conversion.

mysqlbackup from MySQL Enterprise Backup allows logical backup with concurrency built in to get faster backup speed and restoration speed.

NO.40 Which is true about inserting an additional line in a single document stored in MySQL document store?

You specify the new element,s position in the JSON_ARRAY_INSERT statement.

Any new lines can only be inserted at the end of the document.

You cannot insert a single line, you have to replace the entire document with a new document.

The path specified must be an array position past the end of an array using the JSON_POSITION statement.

NO.41 Which activity will take place if a table is created with both the compression and encryption options?

The compression is performed before tablespace data is encrypted.

The tablespace data is encrypted first and then compression is performed.

The system generates an error because the COMPRESSION and ENCRYPTION options cannot be used together.

The compression is performed, the ”data_at_rest_flag” is turned on and the tablespace data is encrypted.

NO.42 Which two statements are true about the creation or use of a Virtual Cloud Network (VCN)?

You can connect directly to the VCN without a define subnet.

Your instance does not have a public IP address, so you cannot connect with a public subnet.

You must have an Internet gateway to connect to a public address on an Oracle Linux instance.

You can connect directly to an instance over the internet, without a public IP address.

You must have an IPSec VPN to connect to an Oracle Linux instance.

NO.43 You execute this statement:
SELECT NULL=NULL;
What is the result?

FALSE

NULL

TRUE

NO.44 The user -os-user’@”localhost” was created to monitor connections and shut down the server, and was granted these privileges:
GRANT PROCESS, SHUTDOWN ON *.* TO “OS-user*@”localhost’;
Which three are commands that the os-user can execute?

SHOW PROCESSLIST;

SHUTDOWN

SHOW STATUS;

SHOW BINLOG EVENTS;

KILL PROCESS;

GRANT PROXY

NO.45 The MySQL Replication Environment (Master and Slave) is prepared.
What two are options for connecting a Java application to the MySQL Master and Slave?

NO.46 What SQL keyword must be specified when creating a foreign key constraint?

a TRIGGER on the child table for cascading delete statements

a REFERENCES in the child table to the parent table

unique PRIMARY key values for both child and parent tables

the SET_FOREGIN variable in the my .cnf file

an index on the foreign key

NO.47 Which MySQL Enterprise Edition plug-in replaces real values with substitutes?

MySQL Enterprise Audit

MySQL Enterprise Scalability

MySQL Enterprise No-Login Authentication

MySQL Enterprise Transparent Data Encryption (TDE)

MySQL Enterprise Data Masking and De-identification

NO.48 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?

Flash-archive recovery area

Cloud storage only

Cloud tape library

Both Cloud storage and local storage

NO.49 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?

The customer does not have proper user rights.

The customer reached the database instance limit of 32.

The customer account might have reached resource quota/limits.

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.

NO.50 You are using the innoDB engine and the innodb_f ile_per_table option is set.
You delete a significant number of rows of a large table named inventory and issue the command optimize table inventory.
What will happen to the inventory table?

The table will be optimized and replicated.

The table will be checked for errors and repaired.

The table storage space will be reduced.

The table statistics will be stored.

NO.51 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?

–uncompress-and-apply-log

–apply-log-and-copy-back

–copy-back-and-apply-log

–uncompress

–decompress

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