Certification 1z0-071 Exam - Associate 1z0-071 Level Exam

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Oracle Database SQL Sample Questions (Q274-Q279):

NEW QUESTION # 274
View the Exhibit and examine the structure in the DEPARTMENTS tables. (Choose two.)

Examine this SQL statement:
SELECT department_id "DEPT_ID", department_name, 'b' FROM
departments
WHERE departments_id=90
UNION
SELECT department_id, department_name DEPT_NAME, 'a' FROM
departments
WHERE department_id=10
Which two ORDER BY clauses can be used to sort the output?

A. ORDER BY 3;
B. ORDER BY DEPT_ID;
C. ORDER BY DEPT_NAME;
D. ORDER BY 'b';

Answer: A,B

NEW QUESTION # 275
Which two are true about transactions in the Oracle Database?

A. DDL statements automatically commit only data dictionary updates caused by executing the DDL.
B. DML statements always start new transactions.
C. A DDL statement issued by a session with an uncommitted transaction automatically Commits that transaction.
D. An uncommitted transaction is automatically committed when the user exits SQL*Plus.
E. A session can see uncommitted updates made by the same user in a different session.

Answer: C,D

Explanation:
This question appears to be a duplicate of question no. 269, and the correct answers provided there apply here as well.
B . True. A DDL statement automatically commits any outstanding uncommitted transaction in the session. E. True. Exiting SQL*Plus without explicitly committing a transaction will cause the uncommitted transaction to be rolled back, not committed.
A, C, and D are incorrect for the same reasons provided in the explanation for question no. 269.

NEW QUESTION # 276
Evaluate the following CREATE TABLE command:

Which statement is true regarding the above SQL statement?

A. It would give an error because the USING INDEX is not permitted in the CRETAE TABLE command.
B. It would execute successfully and two indexes ORD_ITM_IDX and ORD_ITM_ID PK would be created.
C. It would give an error because the USING INDEX clause cannot be used on a composite primary.
D. It would execute successfully and only ORD_ITM_IDX index would be created.

Answer: D

NEW QUESTION # 277
Which two statements are true about a self join?

A. It can be a left outer join.
B. It must be a full outer jolin.
C. It can be an inner join.
D. The join key column must have an index.
E. It must be an equijoin.

Answer: C,D

NEW QUESTION # 278
Examine the description of the CUSTOMERS table:

CUSTNO is the PRIMARY KEY.
You must determine if any customers' details have been entered more than once using a different CUSTNO, by listing all duplicate names.
Which two methods can you use to get the required result?

A. LEFT OUTER JOIN with self join
B. FULL OUTER JOIN with self join
C. self join
D. RIGHT OUTER JOIN with self join
E. subquery

Answer: C,E

NEW QUESTION # 279
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