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Oracle Database Administration I Sample Questions (Q29-Q34):
NEW QUESTION # 29
Evaluate these commands which execute successfully:
Which two statements are true about the ORD_ITEMS table and the ORD_SEQ sequence?
(Choose two.)
- A. Any user inserting rows into table ORD_ITEMS must have been granted access to sequence ORD_SEQ
- B. Sequence ORD_SEQ cycles back to 1 after every 5000 numbers and can cycle 20 times
- C. If sequence ORD_SEQ is dropped then the default value for column ORD_NO will be NULL for rows inserted into ORD_ITEMS
- D. Column ORD_NO gets the next number from sequence ORD_SEQ whenever a row is inserted into ORD_ITEMS and no explicit value is given for ORD_NO
- E. Sequence ORD_SEQ is guaranteed not to generate duplicate numbers
Answer: A,E
NEW QUESTION # 30
Examine the description of the employees table:
Which query requires explicit data type conversion?
- A. SELECT join_date I I ' ' II salary FROM employees;
- B. SELECT join_date + '20' FROM employees; SELECT salary * '120.50' FROM employees;
- C. SELECT SUBSTR<join_date, 1, 2) - 10 FROM employees;
- D. SELECT join_date FROM employees WHERE join_date > '10-02-2018';
Answer: D
NEW QUESTION # 31
Which three statements are true about views in an Oracle database? (Choose three.)
- A. The WITH CHECK clause prevents certain rows from being updated or inserted
- B. Tables in the defining query of a view must always exist in order to create the view
- C. Deleting one or more rows using a view whose defining query contains a GROUP BY clause will cause an error
- D. Inserting one or more rows using a view whose defining query contains a GROUP BY clause will cause an error
- E. Views can be updated without the need to re-grant privileges on the view
- F. Data Manipulation Language (DML) can always be used on views
- G. The WITH CHECK clause prevents certain rows from being displayed when querying the view
Answer: B,D,F
NEW QUESTION # 32
Which two statements are true about Enterprise Manager Database Express? (Choose two.)
- A. The same port number can be used for Database Express configurations for databases on different hosts
- B. The same port number can be used for multiple Database Express configurations for multiple databases on the same host
- C. It can be used to switch a database into ARCHIVELOGMODE
- D. It can be used to perform database recovery
- E. It is available only when the database is open
Answer: B,C
Explanation:
Explanation/Reference: https://docs.oracle.com/en/database/oracle/oracle-database/19/admqs/getting-started-with- database-administration.html#GUID-EB851101-07BE-4038-BB9D-06E01CC7F5D5
NEW QUESTION # 33
Which three statements are true about inner and outer joins? (Choose three.)
- A. Outer joins can only be used between two tables per query
- B. A left or right outer join returns only unmatched rows
- C. A full outer join must use Oracle syntax
- D. A full outer join returns matched and unmatched rows
- E. An inner join returns matched rows
- F. Outer joins can be used when there are multiple join conditions on two tables
Answer: B,D,E
Explanation:
https://www.studytonight.com/dbms/joining-in-sql.php
NEW QUESTION # 34
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