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Test 1Z1-921 Collection - Latest 1Z1-921 Exam Fee

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Oracle 1Z0-921 (MySQL 2021 Implementation Essentials) Certification Exam is an excellent way for individuals to demonstrate their expertise in managing MySQL databases and gain recognition within the industry. By passing 1Z1-921 Exam, candidates can prove to their employers and peers that they have the knowledge and skills necessary to manage MySQL databases effectively and efficiently.

Oracle MySQL 2021 Implementation Essentials Sample Questions (Q17-Q22):

NEW QUESTION # 17
You have been using mysqldump for logical backups of your MySQL databases. Your MySQL database size has been growing. Which two options can reduce the backup size and speed up the backup time?

A. Use MySQL Enterprise Backup with the - -compress option to compress the backup files and use - - compress-level to select the level of compression.
B. Use MySQL Enterprise Backup with the - -size=compress to compress the backup file.
C. Use MySQL Enterprise Backup with the - - incremental policy to back up incrementally based on previous full backup.
D. Use mysqldump with the - -changesonly option.
E. Use mysqldump with - -incremental together with the - -compress option to back up incrementally based on previous full backup and compress the incremental backup files.

Answer: A,D

NEW QUESTION # 18
Which three prerequisites are needed for creating an Oracle Linux VM instance in the Oracle Cloud Infrastructure?

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

Answer: A,C,D

NEW QUESTION # 19
Which two deployment architectures could you use for scaling-out database reads?

A. Edit the configuration file and increase the value for parallel_read_workers and reboot the server
B. Adding a memcached-tier for caching data and objects in RAM to reduce the number of times an external data source must be read.
C. Changing the system setting with memory stickiness to true in order not to swap out mysq1dfrom memory.
D. Implementing a three-node, single-primary InnoDB Cluster.
E. Altering the storage engine for all tables to memory to increase performance.

Answer: D,E

NEW QUESTION # 20
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. As root, execute the show password command by using the SHA-256 password encryption plug-in.
B. The root password displayed on the screen via a [warning] message.
C. The root password inserted in the error log set by the --log-error=[file_name] variable
D. The root_pw variable stored in the mysq1.install table.
E. The root password is not given and is blank. You must manually set the root password.

Answer: A,D

NEW QUESTION # 21
Which query will find rows in a table that have no counterpart in another table?

A. SELECT *FROM table1 INNER JOIN table2 ON table1.id=table2.id WHERE table1.id=! table2.id;
B. SELECT t1.name, t2.name2FROM employee t1 INNER JOIN info t2 WHERE t1.name=t2.name;
C. SELECT t1.name, t2.name2FROM employee AS t1 INNER JOIN info AS t2 ON t1.name= t2.name2;
D. SELECT left_tbl.*FROM left_tbl LEFT JOIN right_tbl ON left_tbl.id=right_tbl.idWHERE right_tbl.id IS NULL;

Answer: D

NEW QUESTION # 22
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