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Oracle Database Administration I Sample Questions (Q20-Q25):

NEW QUESTION # 20
Which two are true about the roles? (Choose two.)

A. A role must be disabled before it can be revoked from a user.
B. All privileges and roles granted to a user are enabled by default when the user logs in.
C. The SET ROLE statement enables as well as disables roles in a session.
D. The SET ROLE statement can be used once per session.
E. The ALTER USER statement must be used to set specific default roles for a user.

Answer: B,C

NEW QUESTION # 21
Which two statements are true about Enterprise Manager (EM) Express?

A. You can shut down a database instance using EM Express.
B. You can use a single instance of EM Express to manage multiple database running on the same server.
C. You cannot start up a database instance using EM Express.
D. By default, EM express is available for a database after database creation using DBCA.
E. EM Express uses a separate repository database to store target database metadata.

Answer: A,D

NEW QUESTION # 22
Which two statements are true about the rules of precedence for operators? (Choose two.)

A. The concatenation operator | | is always evaluated before addition and subtraction in an expression
B. Arithmetic operators with equal precedence are evaluated from left to right within an expression
C. Multiple parentheses can be used to override the default precedence of operators in an expression
D. NULLS influence the precedence of operators in an expression
E. The + binary operator has the highest precedence in an expression in a SQL statement

Answer: C,E

Explanation:
https://docs.oracle.com/cd/B19306_01/server.102/b14200/operators001.htm

NEW QUESTION # 23
Which two statements are true about single row functions? (Choose two.)

A. CONCAT : can be used to combine any number of values
B. MOD : returns the quotient of a division operation
C. TRUNC : can be used to combine any number of values
D. CEIL : can be used for positive and negative numbers
E. FLOOR : returns the smallest integer greater than or equal to a specified number

Answer: B,C

NEW QUESTION # 24
Which three statements are true about views in an Oracle database? (Choose three.)

A. Data Manipulation Language (DML) can always be used on views
B. Views can be updated without the need to re-grant privileges on the view
C. The WITH CHECK clause prevents certain rows from being updated or inserted
D. The WITH CHECK clause prevents certain rows from being displayed when querying the view
E. Deleting one or more rows using a view whose defining query contains a GROUP BY clause will cause an error
F. Tables in the defining query of a view must always exist in order to create the view
G. Inserting one or more rows using a view whose defining query contains a GROUP BY clause will cause an error

Answer: A,F,G

NEW QUESTION # 25
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