Download Oracle Database 12c: Installation and Administration.1z0-062.Prep4Sure.2020-03-02.227q.vcex

Vendor: Oracle
Exam Code: 1z0-062
Exam Name: Oracle Database 12c: Installation and Administration
Date: Mar 02, 2020
File Size: 2 MB
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Demo Questions

Question 1
Examine the parameters for your database instance:
  
You execute the following command:
SQL> ALTER TABLESPACE undotbs1 RETENTION NOGUARANTEE; 
Which statement is true in this scenario?
  1. Undo data is written to flashback logs after 1200 seconds.
  2. Inactive undo data is retained for 1200 seconds even if subsequent transactions fail due to lack of space in the undo tablespace.
  3. You can perform a Flashback Database operation only within the duration of 1200 seconds.
  4. An attempt is made to keep inactive undo for 1200 seconds but transactions may overwrite the undo before that time has elapsed.
Correct answer: D
Question 2
A user establishes a connection to a database instance by using an Oracle Net connection. You want to ensure the following:
  1. The user account must be locked after five unsuccessful login attempts. 
  2. Data read per session must be limited for the user. 
  3. The user cannot have more than three simultaneous sessions. 
  4. The user must have a maximum of 10 minutes session idle time before being logged off automatically. 
How would you accomplish this?
  1. by granting a secure application role to the user
  2. by implementing Database Resource Manager
  3. by using Oracle Label Security options
  4. by assigning a profile to the user
Correct answer: D
Question 3
As a user of the ORCL database, you establish a database link to the remote HQ database such that all users in the ORCL database may access tables only from the SCOTT schema in the HQ database. SCOTT’s password is TIGER. The service mane “HQ” is used to connect to the remote HQ database. 
Which command would you execute to create the database link?
  1. CREATE DATABASE LINK HQ USING 'HQ';
  2. CREATE DATABASE LINK HQ CONNECT TO CURRENT_USER USING ‘HQ’;
  3. CREATE PUBLIC DATABASE LINK HQ CONNECT TO scott IDENTIFIED BY tiger USING 'HQ';
  4. CREATE DATABASE LINK HQ CONNECT TO scott IDENTIFIED BY tiger USING 'HQ';
Correct answer: C
Question 4
Which two statements are true about the logical storage structure of an Oracle database? (Choose two.)
  1. An extent contains data blocks that are always physically contiguous on disk.
  2. An extent can span multiple segments.
  3. Each data block always corresponds to one operating system block.
  4. It is possible to have tablespaces of different block sizes.
  5. A data block is the smallest unit of I/O in data files.
Correct answer: DE
Explanation:
Question 5
Which statement is true about the Log Writer process?
  1. It writes when it receives a signal from the checkpoint process (CKPT).
  2. It writes concurrently to all members of multiplexed redo log groups.
  3. It writes after the Database Writer process writes dirty buffers to disk.
  4. It writes when a user commits a transaction.
Correct answer: D
Explanation:
References:http://docs.oracle.com/cd/B19306_01/server.102/b14220/process.htm (see log writer process (LGWR))
References:
http://docs.oracle.com/cd/B19306_01/server.102/b14220/process.htm (see log writer process (LGWR))
Question 6
The HR user receives the following error while inserting data into the sales table:
  
On investigation, you find that the users tablespace uses Automatic Segment Space Management (ASSM). It is the default tablespace for the HR user with an unlimited quota on it. 
Which two methods would you use to resolve this error? (Choose two.)
  1. Altering the data file associated with the USERS tablespace to extend automatically
  2. Adding a data file to the USERS tablespace
  3. Changing segment space management for the USERS tablespace to manual
  4. Creating a new tablespace with autoextend enabled and changing the default tablespace of the HR user to the new tablespace
  5. Enabling resumable space allocation by setting the RESUMABLE_TIMEOUT parameter to a nonzero value
Correct answer: AB
Question 7
Which three factors influence the optimizer's choice of an execution plan? (Choose three.)
  1. the optimizer_mode initialization parameter
  2. operating system (OS) statistics
  3. cardinality estimates
  4. object statistics in the data dictionary
  5. fixed baselines
Correct answer: ACD
Explanation:
Question 8
Examine the resources consumed by a database instance whose current Resource Manager plan is displayed. 
  
Which two statements are true? (Choose two.)
  1. An attempt to start a new session by a user belonging to DSS_QUERIES fails with an error.
  2. An attempt to start a new session by a user belonging to OTHER_GROUPS fails with an error.
  3. The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited for the CPU due to resource management.
  4. The CPU_WAIT_TIME column indicates the total time that sessions in the consumer group waited for the CPU due to I/O waits and latch or enqueue contention.
  5. A user belonging to the DSS__QUERIES resource consumer group can create a new session but the session will be queued.
Correct answer: CE
Question 9
Which action takes place when a file checkpoint occurs?
  1. The checkpoint position is advanced in the checkpoint queue.
  2. All buffers for a checkpointed file that were modified before a specific SCN are written to disk by DBWn and the SCN is stored in the control file.
  3. The Database Writer process (DBWn) writes all dirty buffers in the buffer cache to data files.
  4. The Log Writer process (LGWR) writes all redo entries in the log buffer to online redo log files.
Correct answer: B
Question 10
Which task would you recommend before using the Database Upgrade Assistant (DBUA) to upgrade a single-instance Oracle 11g R2 database to Oracle Database 12c?
  1. shutting down the database instance that is being upgraded
  2. executing the catctl.pl script to run the upgrade processes in parallel
  3. running the Pre-Upgrade Information Tool
  4. copying the listener.ora file to the new ORACLE_HOME
Correct answer: C
Explanation:
References:http://docs.oracle.com/cd/E11882_01/server.112/e23633/upgrade.htm#UPGRD12395
References:
http://docs.oracle.com/cd/E11882_01/server.112/e23633/upgrade.htm#UPGRD12395
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