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1z0-909 MySQL 8.0 Database Developer Questions and Answers

Questions 4

Examine these statements which execute successfully:

The statements executed without exception. Which two are true?

Options:

A.

No transaction commits.

B.

One row is inserted into band.

C.

Two transactions commit.

D.

No row is inserted into band.

E.

The transaction is rolled back to the savepoint.

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Questions 5

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.

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Questions 6

The variables c and d are declared as integer types.

Examine these initialization statements with placeholder value , which execute successfully:

Now, examine this loop which executes successfully:

Which loop results in the same value of d for all valid values of ?

A)

B)

C)

D)

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

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Questions 7

What is an advantage of using mysqli in PHP programs rather than using PHP Data Objects (PDO)?

Options:

A.

mysqli supports object oriented programming.

B.

mysqli can access databases from other vendors.

C.

mysqli supports non blocking, asynchronous queries.

D.

mysqli includes X DevAPI functions.

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Questions 8

The meeting table stores meeting schedules with participants from five continents. The participants' details are stored in another table.

You need to adjust the start_time and duration columns for optimal storage. What datatype changes would achieve this?

Options:

A.

start_time TIMESTAMP duration TIMESTAMP

B.

start_time TIMESTAMP duration TIME

C.

start_time DATETIME duration DATETIME

D.

start_time TIME duration TIME

E.

start__time DATETIME duration TIME

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Questions 9

Examine this statement and output:

CREATE TABLE geom (g GEOMETRY NOT NOLL, SPATIAL INDEX(g) ) ; Query OK, 0 rows affected, 1 warning (0.01 sec)

An attempt is made to add an SRID attribute to the column using the statement:

ALTER TABLE geom MODIFY COLUMN g geometry NOT NULL SRID 0;

Which is true?

Options:

A.

An error is generated because srid o is an invalid identifier value.

B.

Execution succeeds with a warning.

C.

An error is generated because the index prevents changes to the column.

D.

Execution succeeds and allows the use of the index by the optimizer.

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Exam Code: 1z0-909
Exam Name: MySQL 8.0 Database Developer
Last Update: Sep 25, 2022
Questions: 65

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