最新的Oracle 1Z0-909免費考試真題

問題1

Examine the content of the employee table:

Now examine this PHP script:

Finally examine this desired output:

A. $options = [PDO:: ATTR_DEFAOLT_FETCH__MODE => PDO : : FETCH_BOTH] ;

B. $options = [PDO:: ATTR__DEFAULT_FETCH MODE => PDO: :FETCH_CLASS] ;

C. $options = [PDO:: ATTR_DEFAULT_FETCH__MODE => PDO: : FETCH_ASSOC] ;

D. $options = [PDO:: ATTR_DEFAUXT_FETCH__MODE => PDO: : PDO: :FETCH_OBJ] ;

正確答案: A

問題2

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

Now, examine this statement that execute successfully in s1:
S1> SELECT * FROM emp;
Which is true about the result of the select statement?

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

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

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

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

正確答案: D

問題3

How does InnoDB choose deadlock victims in MySQL?

A. It chooses the transaction with the most accumulated CPU time.

B. It chooses the transaction with the lowest transaction ID.

C. It chooses the transaction with the fewest modified rows.

D. It chooses the transaction with the least accumulated CPU time.

E. It chooses the transaction with the most modified rows.

F. It chooses the transaction randomly.

正確答案: F

問題4

Examine this statement and output:

You execute this statement:
SELECT JSON_SEARCH(product,'one','IT') FROM fshop ;
What is the output?

A. ''$.varieties [3]. origin[0]''

B. product->''$.varieties [4]. origin[1];;

C. ''$.varieties[4]. origin[1]''

D. product->varieties[3]. origin[0]''

正確答案: B

問題5

Examine this statement and output:

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

A.

B.

C.

D.

正確答案: C

問題6

Examine this statement:

A. inserting USE <database >; before line 3

B. user who creates the procedure needing the create and execute privileges

C. user who creates the procedure needing the create routine privilege

D. Inserting DEFINER 'username '@' localhost' clause into the CREATE PROCEDURE statement

E. Inserting COMMIT; SET @m :=: before line 4

正確答案: D

問題7

Examine this statement which has executed successfully:

A. The statement takes advantage of index description_idx.

B. No index will improve statement performance.

C. Execution performance can be improved by using like instead of RLIKE.

D. Execution performance can be improved by, using a composite index with column description as the leftmost prefix column description.

E. Execution performance can be improved by adding an index on column description.

正確答案: C

最新的Oracle MySQL 8.0 Database Developer - 1Z0-909免費考試真題

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