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Quiz von Abdullah Albyati, aktualisiert more than 1 year ago
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Erstellt von Abdullah Albyati
vor mehr als 4 Jahre
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Frage 1
Frage
Which statement is true about the Log Writer process?
Antworten
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A. It writes when it receives a signal from the checkpoint process (CKPT).
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B. It writes concurrently to all members of multiplexed redo log groups.
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C. It writes after the Database Writer process writes dirty buffers to disk.
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D. It writes when a user commits a transaction.
Frage 2
Frage
Which two tasks can be performed on an external table? (Choose two.)
Antworten
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A. partitioning the table
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B. creating an invisible index
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C. updating the table by using an update statement
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D. creating a public synonym
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E. creating a view
Frage 3
Frage
Which action takes place when a file checkpoint occurs?
Antworten
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A. The checkpoint position is advanced in the checkpoint queue.
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B. 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.
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C. The Database Writer process (DBWn) writes all dirty buffers in the buffer cache to data files.
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D. The Log Writer process (LGWR) writes all redo entries in the log buffer to online redo log files.
Frage 4
Frage
Examine the query and its output:
What might have caused three of the alerts to disappear?
Image:
0001500001 (image/png)
Antworten
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A. The threshold alerts were cleared and transferred to DBA_ALERT_HISTORY.
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B. An Automatic Workload Repository (AWR) snapshot was taken before the execution of the second query.
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C. An Automatic Database Diagnostic Monitor (ADOM) report was generated before the execution of the second query.
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D. The database instance was restarted before the execution of the second query.
Frage 5
Frage
Examine the current value for the following parameters in your database instance:
SGA_MAX_SIZE = 1024M -
SGA_TARGET = 700M -
DB_8K_CACHE_SIZE = 124M -
LOG_BUFFER = 200M -
You issue the following command to increase the value of DB_8K_CACHE_SIZE:
SQL> ALTER SYSTEM SET DB_8K_CACHE_SIZE=140M;
Which statement is true?
Antworten
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A. It fails because the DB_8K_CACHE_SIZE parameter cannot be changed dynamically.
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B. It succeeds only if memory is available from the autotuned components if SGA.
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C. It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_TARGET.
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D. It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_MAX_SIZE.
Frage 6
Frage
Which three features work together, to allow a SQL statement to have different cursors for the same statement based on different selectivity ranges? (Choose three.)
Antworten
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A. Bind Variable Peeking
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B. SQL Plan Baselines
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C. Adaptive Cursor Sharing
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D. Bind variable used in a SQL statement
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E. Literals in a SQL statement
Frage 7
Frage
You notice a performance change in your production Oracle 12c database. You want to know which change caused this performance difference.
Which method or feature should you use?
Antworten
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A. Compare Period ADDM report
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B. AWR Compare Period report
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C. Active Session History (ASH) report
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D. Taking a new snapshot and comparing it with a preserved snapshot
Frage 8
Frage
Which three statements are true about Automatic Workload Repository (AWR)? (Choose three.)
Antworten
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A. All AWR tables belong to the SYSTEM schema.
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B. The AWR data is stored in memory and in the database.
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C. The snapshots collected by AWR are used by the self-tuning components in the database
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D. AWR computes time model statistics based on time usage for activities, which are displayed in the v$SYS time model and V$SESS_TIME_MODEL views.
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E. AWR contains system wide tracing and logging information.
Frage 9
Frage
Examine the contents of SQL loader control file:
Which three statements are true regarding the SQL* Loader operation performed using the control file? (Choose three.)
Image:
0005600001 (image/jpeg)
Antworten
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A. An EMP table is created if a table does not exist. Otherwise, if the EMP table is appended with the loaded data.
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B. The SQL* Loader data file myfile1.dat has the column names for the EMP table.
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C. The SQL* Loader operation fails because no record terminators are specified.
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D. Field names should be the first line in the both the SQL* Loader data files.
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E. The SQL* Loader operation assumes that the file must be a stream record format file with the normal carriage return string as the record terminator.
Frage 10
Frage
In your multitenant container database (CDB) containing pluggable database (PDBs), you granted the CREATE TABLE privilege to the common user C # #
A_ADMIN in root and all PDBs. You execute the following command from the root container:
SQL > REVOKE create table FROM C # # A_ADMIN;
What is the result?
Antworten
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A. It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root only.
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B. It fails and reports an error because the CONTAINER=ALL clause is not used.
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C. It excludes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root and all PDBs.
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D. It fails and reports an error because the CONTAINER=CURRENT clause is not used.
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E. It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in all PDBs.
Frage 11
Frage
You are administering a database and you receive a requirement to apply the following
restrictions:
1. A connection must be terminated after four unsuccessful login attempts by user.
2. A user should not be able to create more than four simultaneous sessions.
3. User session must be terminated after 15 minutes of inactivity.
4. Users must be prompted to change their passwords every 15 days.
How would you accomplish these requirements?
Antworten
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A. by granting a secure application role to the users
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B. by creating and assigning a profile to the users and setting the REMOTE_OS_AUTHENT parameter to FALSE
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C. By creating and assigning a profile to the users and setting the SEC_MAX_FAILED_LOGIN_ATTEMPTS parameter to 4
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D. By Implementing Fine-Grained Auditing (FGA) and setting the REMOTE_LOGIN_PASSWORD_FILE parameter to NONE.
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E. By implementing the database resource Manager plan and setting the SEC_MAX_FAILED_LOGIN_ATTEMPTS parameters to 4.
Frage 12
Frage
Which four actions are possible during an Online Data file Move operation? (Choose four.)
Antworten
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A. Creating and dropping tables in the data file being moved
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B. Performing file shrink of the data file being moved
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C. Querying tables in the data file being moved
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D. Performing Block Media Recovery for a data block in the data file being moved
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E. Flashing back the database
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F. Executing DML statements on objects stored in the data file being moved
Frage 13
Frage
Which two statements are true when row archival management is enabled? (Choose two.)
Antworten
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A. The ORA_ARCHIVE_STATE column visibility is controlled by the ROW ARCHIVAL VISIBILITY session parameter.
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B. The ORA_ARCHIVE_STATE column is updated manually or by a program that could reference activity tracking columns, to indicate that a row is no longer considered active.
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C. The ROW ARCHIVAL VISIBILITY session parameter defaults to active rows only.
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D. The ORA_ARCHIVE_STATE column is visible if referenced in the select list of a query.
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E. The ORA_ARCHIVE_STATE column is updated automatically by the Oracle Server based on activity tracking columns, to Indicate that a row is no longer
Frage 14
Frage
Which two are prerequisites for performing a flashback transaction? (Choose two.)
Antworten
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A. Flashback Database must be enabled.
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B. Undo retention guarantee for the database must be configured.
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C. EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back transaction.
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D. Supplemental logging must be enabled.
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E. Recycle bin must be enabled for the database.
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F. Block change tracking must be enabled tor the database.
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