Free Oracle 1Z0-909 Exam Questions

Become Oracle Certified with updated 1Z0-909 exam questions and correct answers

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Total 65 Questions | Updated On: Jan 26, 2025

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Question 1

You must write a statement that combines the first_name and last_name columns from the

employees table as "last_name, first_name."

Which two statements will do this?

A : LECT last_name + ', ' + first_name FROM employees;

B : LECT CONCAT_WS(', ',last_name,first_name) FROM employees;

C : LECT GROUP_CONCAT(last_name, first_name) FROM employees;

D : LECT last_name, ‘ , ',first_name FROM employees;

E : LECT CONCAT(last name,', ',first_name) FROM employees;

Answer: A,B

Question 2

Examine these statement which execute successfully:

Now, examine this desired output:

Which two queries will produce the out?

A :

B :

C :

D :

E :

Answer: B,C

Question 3

Examine the output:

Which explain command will obtain the output?

A : PLAIN ANALYZE

B : PLAIN PARTITIONS

C : PLAIN FORMAT=TREE

D : PLAIN PORMAT^TRADITIONAL

E : PLAIN PORMAT=JSON

Answer: A

Question 4

Examine this statement which has executed successfully:

A : ecution performance can be improved by using like instead of RLIKE.

B : statement takes advantage of index description_idx.

C : ecution performance can be improved by, using a composite index with column description as the leftmost prefix column description.

D : index will improve statement performance.

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

Answer: A

Question 5

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

Answer: C

Page: 1 / 13

Total 65 Questions | Updated On: Jan 26, 2025

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