1Z0-055 | how many questions of 1Z0-055 practice test?
Q151. You are using Recovery Manager (RMAN) to perform backups. In which three situations would you perform a compressed backup? (Choose three.)
A. You are backing up to tape and your tape device performs its own compression.
B. You are making image copies, and you have not enabled tablespace compression.
C. You are using disk-based backups and disk space in your Flash Recovery Area, or other disk-based backup destinations are limited.
D. You are performing your backups to some device over a network where reduced network bandwidth is more important than CPU usage.
E. You are using some archival backup media, such as CD or DVD, where reducing backup sizes saves media costs and archival storage.
Answer: C,D,E
Q152. You want the Automatic SQL Tuning process to stop accepting and implementing the recommended SQL profiles automatically. Which action would you perform to achieve this?
A. Edit the automatic maintenance window group configuration.
B. Set the CURSOR_SHARING parameter to EXACT for the database instance.
C. Use the DBMS_SQLTUNE.SET_TUNING_TASK_PARAMETERS procedure to set ACCEPT_SQL_PROFILES to FALSE.
D. Set the SQLTUNE_CATEGORY parameter to DEFAULT for the database instance.
Answer: C
Q153. Which tasks can be accomplished using the Enterprise Manager Support Workbench in Oracle Database 11g? (Choose all that apply.)
A. Generate reports on data failure such as data file failures.
B. You can package and upload diagnostic data to Oracle Support.
C. You can track the Service Request (SR) and implement repairs.
D. You can manually run health checks to gather diagnostic data for a problem.
Answer: B,C,D
Q154. Evaluate the following code:
SQL>VARIABLE task_name VARCHAR2(255);
SQL>VARIABLE sql_stmt VARCHAR2(4000);
SQL>BEGIN
:sql_stmt := 'SELECT COUNT(*) FROM customers
WHERE cust_state_province =''CA'''
:task_name := 'MY_QUICKTUNE_TASK'
DBMS_ADVISOR.QUICK_TUNE(DBMS_ADVISOR.SQLACCESS_ADVISOR,
:task_name, :sql_stmt);
END;
What is the outcome of this block of code?
A. It creates a task and workload, and executes the task.
B. It creates a task and workload but does not execute the task.
C. It produces an error because a template has not been created.
D. It produces an error because the SQL Tuning Set has not been created.
Answer: A
Q155. You want to take the backup of the USERS tablespace. It has a single data file of 900 MB. You have tape drives of 300 MB each. The SBT channel is configured for the RMAN. To accomplish the backup, you issued the following RMAN command:
RMAN> BACKUP SECTION SIZE 300M TABLESPACE users;
Which two statements are true regarding the execution of the above command? (Choose two.)
A. The backup piece size will be limited to 300 MB.
B. The operation is accomplished using the default channel available.
C. The RMAN parallelizes the backup although the parallelism is not set for a channel.
D. Three channels for the tape drive must be configured by setting the parallelism to three.
Answer: A,B
Q156. The Database Resource Manager is automatically enabled in the maintenance window that runs the Automated Maintenance Task. What is the reason for this?
A. to prevent the creation of an excessive number of scheduler job classes
B. to allow the Automated Maintenance Tasks to use system resources without any restriction
C. to allow resource sharing only among the Automated Maintenance Tasks in the maintenance window
D. to prevent the Automated Maintenance Tasks from consuming excessive amounts of system resources
Answer: D
Q157. You have the following requirements in relation to the detection of block corruption for your database instance:
1. Check for logical self-consistency of data blocks when modified in memory.
2. Checksums are calculated before and after the block change.
3. Checks are performed for the lost writes to the physical standby database.
Which method would help you perform the above checks automatically?
A. Set the DB_SECUREFILE parameter to PERMITTED.
B. Set the DB_ULTRA_SAFE parameter to DATA_ONLY.
C. Set the DB_LOCK_CHECKSUM parameter to TYPICAL.
D. Set the DB_LOST_WRITE_PROTECT parameter to TYPICAL.
Answer: B
Q158. Which two statements are true regarding table compression? (Choose two.)
A. It requires uncompress operation during I/O.
B. It saves disk space and reduces memory usage.
C. It saves disk space but has no effect on memory usage.
D. It incurs extra CPU overhead during DML but not direct loading operations.
E. It incurs extra CPU overhead during DML as well as direct loading operations.
Answer: B,E
Q159. Which statements describe the capabilities of the DBMS_NETWORK_ACL_ADMIN package? (Choose all that apply.)
A. It can be used to allow the access privilege settings for users but not roles.
B. It can be used to allow the access privilege settings for users as well as roles.
C. It can be used to control the time interval for which the access privilege is available to a user.
D. It can be used to selectively restrict the access for each user in a database to different host computers.
E. It can be used to selectively restrict a user's access to different applications in a specific host computer.
Answer: B,C,D
Q160. Your system has been upgraded from Oracle Database 10g to Oracle Database 11g. You imported SQL Tuning Sets (STS) from the previous version. After changing the OPTIMIZER_FEATURE_ENABLE parameter to 10.2.0.4 and running the SQL Performance Analyzer, you observed performance regression for a few SQL statements. What would you do with these SQL statements?
A. Set OPTIMIZER_USE_PLAN_BASELINES to FALSE to prevent the use of regressed plans.
B. Capture the plans from the previous version using STS and then load them into the stored outline.
C. Capture the plans from the previous version using STS and then load them into SQL Management Base (SMB).
D. Set OPTIMIZER_CAPTURE_SQL_PLAN_BASELINES to FALSE to prevent the plans from being loaded to the SQL plan baseline.
Answer: C