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Oracle Database Administration I Sample Questions (Q67-Q72):

NEW QUESTION # 67
Your database instance is started with a PFILE.
Examine these parameters:

You want to increase the size of the buffer cache.
Free memory is available to increase the size of the buffer cache.
You execute the command:
SQL> ALTER SYSTEM SET DBCACHESIZE=1024M;
What is the outcome?

• A. It fails because the SCOPE clause is missing
• B. The value is changed for the current instance and in the PFILE
• C. Change is applied to the current instance, but does not persist after instance restart
• D. The value is changed only in the PFILE and takes effect at the next instance startup

Answer: C Explanation:
Explanation/Reference: https://docs.oracle.com/database/121/SQLRF/statements2017.htm#SQLRF00902
NEW QUESTION # 68
In the ORCL database, UNDOTBS1 is the active undo tablespace with these properties:
1. A size of 100 MB
2. AUTOEXTEND is off
3. UNDORETENTION is set to 15 minutes
4. It has RETENTION GUARANTEE
UNDOTBS1 fills with uncommitted undo 10 minutes after the database opens.
What will happen when the next update is attempted by any transaction?

• A. It fails and returns the error message "ORA-30036: unable to extend segment by 8 in undo tablespace
  'UNDOTBS1'".
• B. It succeeds and the least recently written undo block of UNDOTBS1 is overwritten by the generated undo.
• C. It succeeds and the generated undo is stored in SYSAUX.
• D. It succeeds and the least recently read undo block of UNDOTBS1 is overwritten by the generated undo.
• E. It succeeds and the generated undo is stored in SYSTEM.

Answer: B
NEW QUESTION # 69
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. The + binary operator has the highest precedence in an expression in a SQL statement
• D. NULLS influence the precedence of operators in an expression
• E. Multiple parentheses can be used to override the default precedence of operators in an expression

Answer: C,E Explanation:
Explanation/Reference: https://docs.oracle.com/cd/B19306_01/server.102/b14200/operators001.htm
NEW QUESTION # 70
Which two types of files are opened by a database instance in the NOMOUNT state?

• A. the alert log
• B. data files
• C. the initialization parameter file
• D. control files
• E. online redo logs

Answer: B,C
NEW QUESTION # 71
Which two statements are true about the DUAL table? (Choose two.)

• A. It can display multiple rows and columns
• B. It can display multiple rows but only a single column
• C. It consists of a single row and single column of VARCHAR2 data type
• D. It can be accessed by any user who has the SELECT privilege in any schema
• E. It can be accessed only by the SYS user
• F. It can be used to display only constants or pseudo columns

Answer: A,C
NEW QUESTION # 72
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