Free Oracle 1Z0-921 Exam Dumps Questions & Answers


Exam Code/Number:	1Z0-921Join the discussion
Exam Name:	MySQL 2021 Implementation Essentials
Certification:	Oracle
Free Question Number:	78
Publish Date:	Oct 07, 2026
# of views:	3387
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Total 78 questions

Question 1

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?

A.mysqlbackup from MySQL Enterprise Backup allows logical backup with concurrency built in to get faster backup speed and restoration speed.
B.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.
C.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.
D.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.
E.MySQL Enterprise Backup does not back up system data so that it is much faster.

Question 2

Which three prerequisites are needed for creating an Oracle Linux VM instance in the Oracle Cloud Infrastructure?

A.subnet configured on a Virtual Cloud Network (VCN)
B.bare metal Oracle Linux shape
C.Object Storage
D.ssh key pair
E.Custom Image
F.existing VCN

Question 3

The slave connects to the master and asks for updated records. What command was issued for this to happen?

A.SLAVE START
B.START SLAVE
C.START RUN SLAVE
D.SLAVE RUN
E.RUN SLAVE

Question 4

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

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

Question 5

What SQL keyword must be specified when creating a foreign key constraint?

A.the SET_FOREGIN variable in the my .cnf file
B.unique PRIMARY key values for both child and parent tables
C.an index on the foreign key
D.a REFERENCES in the child table to the parent table
E.a TRIGGER on the child table for cascading delete statements