Oracle itexams oracle Database 19c 1z0-083 Dumps Pdf by Declan q254 vce pdf

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Exam Name:	Oracle Database Administration II
Exam Code:	1z0-083 Dumps
Vendor:	Oracle	Certification:	Oracle Database 19c
Questions:	286 Q&A's	Shared By:	declan

Question 52

Choose the best answer. Which should be tuned first when doing a performance tuning exercise for an Oracle Database environment?

Options:

log writer performance

database writer performance

general operating system health

SQL statements

database instance memory management and sizes

Discussion

Question 53

Choose two. Which two restrictions apply when the RMAN BACKUP AS COPY command is used to create a backup?

Options:

Backups can be taken only if a fast recovery area is configured.

Backups can be written only to disk.

Backups can be taken only for data files.

Binary compression cannot be applied to the backup.

Backups can be written only if checksums are stored for each block.

Backups can be written only to media.

Discussion

Question 54

Choose two You upgrade your database from pre-12c to a multitenant container database (CDB) that contains pluggable databases (PDBs). Examine the query and its output: SQL> SELECT * FROM v $PWFILE_users; USERNAME SYSDB SYSOP SYSAS SYSBA SYSDG SYSKM CON_ID ------------------------------------------------------------------------SYS TRUE TRUE FALSE FALSE FALSE FALSE 0 Which two tasks must you perform to add users with the SYSBACKUP, SYSDG, and SYSKM prileges to the password file?

Options:

Re-create or migrate the password file to the Oracle Database 12c format

Grant the SYSBACKUP, SYSDG, and SYSKM privileges to the intended users.

Copy the password file from a sample file in the DBS dierectory

Assign appropriate operating system groups to SYSBACKUP, SYSDG, and SYSKM.

Discussion

Question 55

Which two are true about Oracle Optimizer Statistics, their use, and their collection? (Choose two.)

Options:

The number of table rows is considered when evaluating the cost of accessing a table using an index.

Index balanced B*Tree height is considered when evaluating the cost of using an index.

The Statistics Advisor can help recommend the best way to gather statistics.

Statistics collected using DBMS_STATS always yield the best optimizer result.

The Statistics Advisor generates actions for all recommendations.

Discussion

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