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1z0-909 Exam Dumps : MySQL 8.0 Database Developer

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MySQL 8.0 Database Developer Questions and Answers

Question 1

Examine these statements and output:

Now, examine this command:

Mysql> ROLLBACK;

What is true about the effect of the command?

Options:

A.

It undoes the update command.

B.

It returns an error because there is no active transaction.

C.

It undoes the insert command.

D.

It undoes both insert and update commands.

E.

It has no effect.

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Question 2

Examine the Test.php script which is numbered for clarity, and its output:

PHP Fatal error: Uncaught Error: call to underined function mysqli_connect () in Test.php:2

Which action will fix this error?

Options:

A.

Enable the mysqli extension in the php.ini file.

B.

Replace line 2 with Slink = mysql.connect {"localhost: 3306n, "username", "pas "schema") ;

C.

Replace line 2 With: Slink = mysql_xdevapi\getSession

("mysqlx://username:password@localhost:3306","schema");

D.

Install the PHP executable in the path used by the MySQL installation.

Question 3

Which select statement returns true?

Options:

A.

SELECT NULL <> NULL;

B.

SELECT NULL <=> NULL;

C.

SELECT NULL = NULL;

D.

SELECT NULL := NULL;