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Oracle 1z0-909 Dumps

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MySQL 8.0 Database Developer Questions and Answers

Question 1

Examine the output:

as

Which explain command will obtain the output?

Options:

A.

EXPLAIN ANALYZE

B.

EXPLAIN PARTITIONS

C.

EXPLAIN FORMAT=TREE

D.

EXPLAIN PORMAT^TRADITIONAL

E.

EXPLAIN PORMAT=JSON

Question 2

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

as

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

Examine this statement and output:

as

Which is true?

Options:

A.

The underlying table's index on the Name column is not chosen because of low selectivity.

B.

myview cannot be automatically indexed.

C.

myview was defined with the temptable processing algorithm.

D.

Column Name in myview can be indexed if the is_updatable attribute is true.

Question 4

Which two are true about MySQL connectors?

Options:

A.

Connectors must be installed on both the client and server hosts.

B.

Connector/J is based on Connector/C.

C.

Connector/ODBC is available on Unix, Windows, and MacOS X.

D.

Connector/NET runs on the Windows platform only.

E.

Connector/Python is released in precompiled binary and source code.

Question 5

Examine this statement and output:

as

Which will provide the same level of detail when the error is encountered within a stored routine?

A)

as

B)

as

C)

as

D)

as

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 6

The employee table includes these columns:

e_id INT, e_name VARCHAR (45), dept_id INT salart INT

You must create a stored function, getMaxSalary(), which returns the maximum salary paid for a given department id.

Which statement will create the function?

A)

as

B)

as

C)

as

D)

as

Options:

A.

Option A

B.

Option B

C.

Option C

D.

Option D

Question 7

Examine this bar graph based on columns from the players table:

as

Which two statements would generate this bar graph?

Options:

A.

SELECT Name, Gender, Sport, REPEAT('# 'Y GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

B.

SELECT Name, Gender, Sport, LENGTH (GPA*10, '# ') AS GPA_Graph FROM players ORDER BY GPA DESC;

C.

SELECT Name, Gender, Sport, CHAR_LENGTH ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

D.

SELECT Name, Gender, Sport, RPAD ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

E.

SELECT Name, Gender, Sport, CONCAT ('# ' GPA*10) AS GPA_Graph FROM players ORDER BY GPA DESC;

Question 8

Examine this statement:

DECLARE not_found CONDITION FOR SQLSTATE '02000';

In which two statements can not found be used?

Options:

A.

in a leave statement to exit a loop

B.

in an if statement

C.

in a while loop

D.

in a handler declaration

E.

in a signal statement

Question 9

Examine this statement which executes successfully:

CREATE TABLE 'fshop’ ('product' JSON DEFAULT NULL ) ENGINE=InnoDB;

Now, examine a json value contained in the table:

{"name" : "orange", "varieties" : [{"VarietyName":"Clementine", "Origin" : ["PA", "BU"] }, {"VarietyName": "tangerine", "Origin" : ["CH","JP"]>]>

Which will cause documents to be indexed over the 'name' key?

Options:

A.

ALTER TABLE fshop ADD COLUMN name VARCHAR(20) AS (product-

>* S .varieties. VarietyName ' ) VIRTUAL, ADD KEY idx_name (name.) ;

B.

ALTER TABLE fshop ADD COLUMN name VARCHAR(100) AS (product->' S - varieties' ) VIRTUAL, ADD KEY idx_name (name) ;

C.

ALTER TABLE fshop ADD COLUMN name VARCHAR(20) AS (product->' S - name' ) VIRTUAL, ADD KEY idx_name (name) ;

D.

ALTER TABLE fshop ADD COLUMN name VARCHAR(20), ADD KEY idx_name (name) ;

E.

ALTER TABLE fshop ADD name VARCHAR(20) AS (JSON_ONQUOTE (product->"S.varieties.VarietyName")), ADD INDEX (name);

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