Oracle 1Z0-921 : MySQL 2021 Implementation Essentials

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Oracle 1Z0-921 Exam Syllabus Topics:

Oracle MySQL 2021 Implementation Essentials Sample Questions:

1. Which two statements are true about MySQL Enterprise Authentication?

A) MySQL Enterprise Authentication determines what operation the user can perform.
B) MySQL Enterprise Authentication supports Windows Active Directory.
C) MySQL Enterprise Authentication makes it more difficult to set up security because you have different sets of security policies.
D) MySQL Enterprise Edition automatically connects to Oracle Password Vault to verify user passwords..
E) MySQL Enterprise Authentication supports Linux Pluggable Authentication Modules (PAM).

2. Which statement would you use to remove the population column from the city table?

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

3. 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;

4. You execute this statement:
SELECT NULL=NULL;
What is the result?

A) 1
B) 0
C) TRUE
D) NULL
E) FALSE

5. Which three are recommended configurations for installing and running MySQL InnoDB Cluster?

A) use SSD,s for data and replication logs
B) Use Network-attached storage (NAS) for the data files.
C) Networks must be in separate regions.
D) isolated machine resources
E) Groups must be in even numbers; 2, 4, 6, 8.
F) The number of machines per group must be 3, 5, 7 or 9.
G) smaller VM,s work best - with a maximum of eight vCPU,s and 16GB of RAM

Solutions: