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1z0-909 MySQL 8.0 Database Developer Question and Answers

MySQL 8.0 Database Developer

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Total Questions : 65

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Question # 1

Examine this statement and output:

Question # 1

Now, examine these desired output values:

Question # 1

Which statement updates the table data as require

Options:

A.  

UPDATE exam_result SET score=TRUNCATE

B.  

UPDATE examresult SET score=ROUND(CEIL(score

C.  

UPDATE exam_result SET score=CEIL(TRUNCATE(sco

D.  

UPDATE exam_result SET score=CEIL(ROUND(score,1));

E.  

UPDATE exam_result SET score=ROUND(score,1);

F.  

UPDATE exam_result SET score=TRUNCATE(score,1);

Discussion 0
Question # 2

Examine these commands which execute successfully in the sequence shown in Sessions S1 and S2:

Question # 2

Now, examine this statement that execute successfully in s1:

S1> SELECT * FROM emp;

Which is true about the result of the select statement?

Options:

A.  

The inserted row is returned because the transaction is auto committed in S2.

B.  

The inserted row is not returned because the isolation level is READ COMMITTED in S2.

C.  

The inserted row is not returned because the transaction still active in s2.

D.  

The inserted row is returned because the isolation level is RPEATABLE READ in S1.

Discussion 0
Question # 3

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)

Question # 3

B)

Question # 3

C)

Question # 3

D)

Question # 3

Options:

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

Discussion 0
Question # 4

Examine this event's metadata:

Question # 4

Now examine this command:

DROP USER 'userl'e'localhost';

Which effect will the command have on the event?

Options:

A.  

The event is scheduled and executed but fails. The system will log an error.

B.  

The event is scheduled but will no longer execute. The system will log an error.

C.  

The event will be dropped without an error or warning.

D.  

The event is not scheduled and will no longer execute. The system will log an error.

Discussion 0
Question # 5

How does InnoDB choose deadlock victims in MySQL?

Options:

A.  

It chooses the transaction with the lowest transaction I

D.  

B.  

It chooses the transaction with the least accumulated CPU time.

C.  

It chooses the transaction with the most accumulated CPU time.

D.  

It chooses the transaction randomly.

E.  

It chooses the transaction with the most modified rows.

F.  

It chooses the transaction with the fewest modified rows.

Discussion 0
Question # 6

Your session has sqi_mode set to default.

Examine this statement which executes successfully:

Question # 6

Now examine this statement:

Question # 6

Which two changes are required to the insert statement so that it inserts the correct data?

• std_id = 10301

• firstname = Mary

• lastname = O'Hagen

• birthdate = November 26, 1997

• reg_date = the current date

Options:

A.  

Change DATE () to DAY ().

B.  

Change "O'Hagen" to 'o\'Hagen'.

C.  

Change date () to CURRENT_TIMESTAMP () .

D.  

Change " NULL " to NULL.

E.  

Change " NULL " to ' NULL ' .

F.  

Change "O'Hagen" to "O\'Hagen".

Discussion 0
Question # 7

Examine this statement and output:

Question # 7

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

A)

Question # 7

B)

Question # 7

C)

Question # 7

D)

Question # 7

Options:

A.  

Option A

B.  

Option B

C.  

Option C

D.  

Option D

Discussion 0
Question # 8

Which two statements are true about AUTO_INCREMENT?

Options:

A.  

AUTO_INCREMENT values allocated to a transaction that is rolled back are not reused.

B.  

A table can have multiple AUTO_INCREMENT columns.

C.  

A server restart always resets the AUTO_INCREMENT value to largest value in the AUTO_INCREMENT column plus 1.

D.  

The decimal data type supports AUTO_INCREMENT.

E.  

An AUTO_INCREMENT column must be indexed.

Discussion 0
Question # 9

Examine these commands and output:

Question # 9

Question # 9

Which is true about the execution of the insert statement?

Options:

A.  

It returns an error.

B.  

It inserts a row in the view and base table.

C.  

It inserts a new row in the base table only.

D.  

It inserts a new row in the view only.

Discussion 0