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Oracle 1Z0-921: MySQL 2021 Implementation Essentials exam requires a solid understanding of MySQL and its features. Candidates who prepare for the exam through training, hands-on practice, and reading materials are more likely to pass the exam on the first attempt. Candidates can prepare for the exam by taking online training courses, attending classroom training, reading books, and practicing with sample questions.

Oracle 1Z0-921 certification exam, also known as the MySQL 2021 Implementation Essentials exam, is an industry recognized certification that validates the skills and knowledge of MySQL database administrators, developers, and other IT professionals. 1Z0-921 Exam is designed to test the candidate's proficiency in MySQL database architecture, installation and configuration, security, backup and recovery, performance tuning, and troubleshooting.

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Oracle MySQL 2021 Implementation Essentials Sample Questions (Q71-Q76):

NEW QUESTION # 71
Which three are characteristics of the JSON data type?

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

Answer: C,D,E

NEW QUESTION # 72
Which three prerequisites are needed for creating an Oracle Linux VM instance in the Oracle Cloud Infrastructure?

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

Answer: A,C,E

NEW QUESTION # 73
Which two statements are true about the creation or use of a Virtual Cloud Network (VCN)?

A. You can connect directly to the VCN without a define subnet.
B. Your instance does not have a public IP address, so you cannot connect with a public subnet.
C. You must have an Internet gateway to connect to a public address on an Oracle Linux instance.
D. You can connect directly to an instance over the internet, without a public IP address.
E. You must have an IPSec VPN to connect to an Oracle Linux instance.

Answer: A,D

NEW QUESTION # 74
Which statement would you use to remove the population column from the city table?

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

Answer: C

NEW QUESTION # 75
Which is true about inserting an additional line in a single document stored in MySQL document store?

A. You cannot insert a single line, you have to replace the entire document with a new document.
B. The path specified must be an array position past the end of an array using the JSON_POSITION statement.
C. Any new lines can only be inserted at the end of the document.
D. You specify the new element,s position in the JSON_ARRAY_INSERT statement.

Answer: D

NEW QUESTION # 76
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