Which three statements are true about a database instance that has mounted a database but has not opened it?
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Oracle 1Z0-497, Oracle Database 12c Essentials, is part of the Oracle Database Application Development,Oracle Partner Network certification path. It is designed for candidates who want to validate their understanding of Oracle Database 12c core concepts, administration fundamentals, and key architecture topics. This exam matters for professionals who need a solid foundation in Oracle database features and operational knowledge. Preparing well helps you demonstrate practical readiness for real-world Oracle database environments.
| # | Exam Topics | Sub-Topics | Approximate Weightage (%) |
|---|---|---|---|
| 1 | Oracle Database Software | Core database components, software capabilities, release basics | 8% |
| 2 | Administration & Configuration | Basic administration tasks, configuration overview, database setup concepts | 10% |
| 3 | Oracle Database 12c New Features | 12c enhancements, feature changes, multitenant introduction | 12% |
| 4 | Maximum Availability Architecture | High availability concepts, redundancy, failover planning | 9% |
| 5 | Backup and Recovery | Backup methods, recovery concepts, restore procedures | 11% |
| 6 | Monitoring | Performance monitoring, alerts, basic diagnostic checks | 7% |
| 7 | Administering Users and Security | User management, privileges, roles, security basics | 10% |
| 8 | Software Installation and Maintenance | Installation steps, patching basics, maintenance tasks | 8% |
| 9 | Oracle Data Structures | Tables, indexes, segments, logical storage structures | 9% |
| 10 | Oracle Database Instance Architecture | SGA, PGA, background processes, memory architecture | 6% |
| 11 | Oracle Multitenant Architecture | CDB and PDB concepts, container management, architecture overview | 5% |
| 12 | Oracle Network Architecture | Listener basics, connectivity, naming and network components | 5% |
The exam tests whether candidates understand Oracle Database 12c concepts at a practical level, not just in theory. You should be comfortable with database architecture, security, backup and recovery, multitenant concepts, and basic administration tasks. It also checks your ability to recognize correct Oracle features and apply them in real scenarios. Strong preparation helps you answer both concept-based and environment-based questions with confidence.
Which three statements are true about a database instance that has mounted a database but has not opened it?
The session of user SCOTT receives the following error after executing an UPDATE command on the EMP table:
ERROR at line 1:
ORA-00060: deadlock detected while waiting for resource
You find out that a session opened by user JIM has a transaction that caused the deadlock. Which two statements are true about SCOTT's session in this scenario?
Which logical storage relationship is correct?
http://www.dummies.com/how-to/content/basics-of-logical-structures-in-oracle-12c.html
A DBA informs you that an Oracle instance has started. What does this imply?
For which database operation do you need the database to be in MOUNT state?
To enable or disable archiving, the database must be mounted but not open.
Note: See step 5 below.
Changing the Database Archiving Mode
To change the archiving mode of the database, use the ALTER DATABASE statement with the ARCHIVELOG or NOARCHIVELOG clause. To change the archiving mode, you must be connected to the database with administrator privileges (AS SYSDBA).
The following steps switch the database archiving mode from NOARCHIVELOG to ARCHIVELOG:
1.Shut down the database instance
2.Back up the database.
3.Edit the initialization parameter file to include the initialization parameters that specify the destinations for the archived redo log files
4.Start a new instance and mount, but do not open, the database.
STARTUP MOUNT
To enable or disable archiving, the database must be mounted but not open.
5.Change the database archiving mode. Then open the database for normal operations.
ALTER DATABASE ARCHIVELOG;
ALTER DATABASE OPEN;
6.Shut down the database.
SHUTDOWN IMMEDIATE
7.Back up the database.
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This exam is for candidates pursuing the Oracle Database Application Development,Oracle Partner Network certification path and for professionals who want to validate Oracle Database 12c Essentials knowledge.
The difficulty depends on your familiarity with Oracle Database 12c concepts, administration basics, and architecture topics. Candidates with hands-on exposure usually find it easier.
Braindumps alone are not the best approach. You should use them with study and practice so you understand the concepts behind the answers.
Hands-on experience is very helpful because many topics are practical, such as backup and recovery, users and security, and database architecture. It improves confidence for a first attempt pass.
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The Exam PDF provides actual questions and answers for focused review, while the practice test simulates the exam environment and helps you improve speed, accuracy, and time management.
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