Oracle MySQL 8.0 Database Developer - 1Z0-909 FREE EXAM DUMPS QUESTIONS & ANSWERS]

Question 1

You must enforce data integrity for data Inserted in a JSON column.
Which statement successfully creates a constraint in a 3SON column?

A. CREATE TABLE fshop (id INT NOT NULL AUTO_ INCREMENT, product JSON, CHECK (id>0) ) ENGXNE=InnoDB; B. CREATE TABLE fshop (product JSON CHECK (JSON_VALID(product) ) ) ; C. CREATE TABLE fshop ( product JSON, f INT' GENERATED ALWAYS AS (product->"S - id") ) ; D. CREATE TABLE fshop (id INT NOT NULL AUTOINCREMENT, product JSON, PRIMARY KEY (id)) ENGINE=InnoDB;

Discussion 0

Correct Answer: D Vote an answer

Question 2

Examine this statement which has executed successfully:

A. Execution performance can be improved by adding an index on column description. B. Execution performance can be improved by using like instead of RLIKE. C. The statement takes advantage of index description_idx. D. No index will improve statement performance. E. Execution performance can be improved by, using a composite index with column description as the leftmost prefix column description.

Discussion 0

Correct Answer: B Vote an answer

Question 3

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

A. mysqli supports non blocking, asynchronous queries. B. mysqli includes X DevAPI functions. C. mysqli supports object oriented programming. D. mysqli can access databases from other vendors.

Discussion 0

Correct Answer: C Vote an answer

Question 4

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.

B.

C.

D.

Discussion 0

Correct Answer: B Vote an answer

Question 5

Examine these commands and output:

Which is true?

A. A new view is created because the previous was dropped on execution of the drop table statement. B. It returns an error because the CREATE TABLE statement automatically recreated the view. C. Existing emp_vuL is dropped and a new emp_vu1 created with the new definition. D. It returns an error because the DROP TABLE statement did not drop the view.

Discussion 0

Correct Answer: D Vote an answer

Question 6

Examine these statement which execute successfully:

Now, examine this desired output:

Which two queries will produce the out?

A.

B.

C.

D.

E.

Discussion 0

Correct Answer: A,D Vote an answer

Question 7

The variables c and d are declared as integer types.
Examine these initialization statements with placeholder value <p1>, which execute successfully:
Now, examine this loop which executes successfully:

Which loop results in the same value of d for all valid values of <p1>?
A)

B)

C)

A. Option B B. Option A C. Option C D. Option D

Discussion 0

Correct Answer: B Vote an answer