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Home Oracle 1z0-083

Oracle 1z0-083 Exam Practice Questions (P. 3)

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Question #11
Which two are true about the character sets used in an Oracle database? (Choose two.)
  1. A
    Single-byte character sets provide better performance than multibyte character sets.
  2. B
    Unicode enables information from any language to be stored using a single character set.
  3. C
    Unicode is the only supported character set for Oracle databases created using Database Configuration Assistant (DBCA).
  4. D
    Single-byte character sets always use 7-bit encoding schemes.
  5. E
    Multibyte character sets allow more efficient space utilization than single byte character sets.
  6. F
    Single-byte character sets always use 8-bit encoding schemes.

Correct Answer:
AB
Reference:
https://docs.oracle.com/database/121/NLSPG/ch2charset.htm#NLSPG166

Question #12
Which three are true about monitoring waits for sessions and services? (Choose three.)
  1. A
    V$SESSION_EVENT displays all waits for all past and existing sessions if the wait has occurred at least once for a session.
  2. B
    V$SERVICE_EVENT displays all waits for all services if the wait has occurred at least once for a service.
  3. C
    V$SESSION_WAIT_CLASS displays waits broken down by wait class only for waiting sessions.
  4. D
    V$SESSION_WAIT and V$SESSION both contain details of the event on which a non-waiting session last waited.
  5. E
    V$SESSION_EVENT displays all waits for all past sessions if the wait has occurred at least once for a session.
  6. F
    V$SESSION_WAIT and V$SESSION both contain details of the event on which a session is currently waiting.

Correct Answer:
BDF
chatbot-img GPT-4o - Answer
The Oracle views V$SESSION_WAIT and V$SESSION both provide critical insights into session waits. They share details on what event a session was last waiting on if it's currently not waiting, and if the session has a current wait, they display the resource or event causing the wait. This makes them indispensable for real-time monitoring of session activities and diagnosing potential issues quickly. These views cover both scenarios where sessions are waiting and not waiting, offering a comprehensive understanding of session behaviors. Such dual functionality enhances their utility in database monitoring and performance tuning.

Question #13
You must transport the UNIVERSITY tablespace from one database to another.
The UNIVERSITY tablespace is currently open read/write.
The source and destination platforms have different endian formats.
Examine this list of actions:
1. Make the UNIVERSITY tablespace read-only on the source system.
2. Export the UNIVERSITY tablespace metadata using EXPDP.
3. Convert the UNIVERSITY tablespace data files to the destination platform format using RMAN on the source system.
4. Copy the UNIVERSITY tablespace data files to the destination system.
5. Copy the Data Pump dump set to the destination system.
6. Convert the UNIVERSITY tablespace data files to the destination platform format using RMAN on the destination system.
7. Import the UNIVERSITY tablespace metadata using IMPDP.
8. Make the UNIVERSITY tablespace read/write on the destination system.
Which is the minimum number of actions required, in the correct order, to transport the UNIVERSITY tablespace?
  1. A
    1, 2, 4, 5, 7, 8
  2. B
    1, 2, 4, 6, 7, 8
  3. C
    1, 2, 3, 4, 5, 7, 8
  4. D
    1, 2, 3, 4, 5, 6, 7, 8
  5. E
    2, 4, 5, 6, 7

Correct Answer:
B
chatbot-img GPT-4o - Answer
Given the differing endian formats between the source and destination systems, it’s crucial to carry out a conversion using RMAN after transferring the data files to the destination system. This ensures compatibility without unnecessary conversions prior to transfer, preserving data integrity and optimizing the process. Hence, it’s vital to include step 6 for converting data files immediately upon arrival at the destination system, making the progression of steps 1, 2, 4, 6, 7, and 8 the most streamlined and error-free approach for transporting the UNIVERSITY tablespace. Steps beyond these would introduce redundancies that may complicate or lengthen the transportation process unnecessarily.

Question #14
Which two are true about OS groups and users for Oracle Grid Infrastructure and the Oracle Relational Database Management System (RDBMS)? (Choose two.)
  1. A
    By default, members of the OSASM group can access Automatic Storage Management and RDBMS instances.
  2. B
    The primary group for the Oracle Grid Infrastructure and Oracle Database owners must be the Oracle Inventory group.
  3. C
    The Oracle Grid Infrastructure installation must be owned by the grid user.
  4. D
    The Oracle Grid Infrastructure owner owns Oracle Restart and Oracle Automatic Storage Management binaries.
  5. E
    The Oracle Grid Infrastructure owner must have OSOPER, OSBACKUPDBA, and OSKMDBA as secondary groups.
  6. F
    The same OSDBA group must be used for Automatic Storage Management and the Oracle Database.

Correct Answer:
EF
Reference:
https://docs.oracle.com/database/121/CWWIN/usrgrps.htm#CWWIN-GUID-6FD3C6AE-5A99-4C6D-85D6-868CBA6F5DAE

Question #15
Which four are true about duplicating a database using Recovery Manager (RMAN)? (Choose four.)
  1. A
    Duplication can be done by having the auxiliary database instance pull backup sets from the target database instance.
  2. B
    A connection to an auxiliary instance is always required.
  3. C
    A subset of the target database can be duplicated.
  4. D
    A new DBID is always created for the duplicated database.
  5. E
    A connection to the recovery catalog instance is always required.
  6. F
    A backup of the target database is always required.
  7. G
    Duplication can be done by having the target database instance push copies to the auxiliary database instance.
  8. H
    A connection to the target database instance is always required.

Correct Answer:
ABFG
chatbot-img GPT-4o - Answer
When duplicating a database using RMAN, connections to both the target and auxiliary instances are not always required. For instance, using backup-based duplication without a target database connects solely to the auxiliary instance. Additionally, the duplication process doesn't invariably result in a new DBID; this is retained if duplicating with the FOR STANDBY clause or when manually moving backup files without using RMAN's direct functions. Thus, in practice, only knowing where duplication processes pull/push data and the necessity of backups and auxiliary connections under certain conditions are essential.

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