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NEW QUESTION 49
Which two statements are true about UNDO and REDO? (Choose two.)
- A. DML modifies Oracle database objects and only generates REDO
- B. DML modifies Oracle database objects and only generates UNDO
- C. The generation of UNDO generates REDO
- D. The generation of REDO generates UNDO
- E. DML modifies Oracle database objects and generates UNDO and REDO
Answer: C,E
Explanation:
https://www.experts-exchange.com/articles/13880/UNDO-AND-REDO-IN-ORACLE.html
NEW QUESTION 50
Which two statements are true about views used for viewing tablespace and datafile information?
(Choose two.)
- A. V$TABLESPACE displays information about tablespaces contained in the data dictionary
- B. V$TABLESPACE displays information that is contained in the controlfile about tablespaces
- C. Tablespace free space can be viewed in V$TABLESPACE
- D. Tablespace free space can be viewed in DBA_TABLESPACES
- E. A datafile can be renamed when the database is in MOUNT state and the new file name is displayed when querying DBA_DATA_FILES after the database is opened
Answer: B,E
NEW QUESTION 51
What is true about non-equijoin statement performance? (Choose two.)
- A. Table aliases can improve performance
- B. The Oracle join syntax performs better than the SQL:1999 compliant ANSI join syntax
- C. The BETWEEN condition always performs less well than using the >= and <= conditions
- D. The join syntax used makes no difference to performance
- E. The BETWEEN condition always performs better than using the >= and <= conditions
Answer: A,B
Explanation:
Explanation
NEW QUESTION 52
In which three situations does a new transaction always start? (Choose three.)
- A. when issuing a DML statement after a DML statement failed in the same session
- B. when issuing a CREATE INDEX statement after a CREATE TABLE statement completed successfully in the same session
- C. when issuing the first Data Manipulation Language (DML) statement after a COMMIT OR ROLLBACK statement was issued in the same session
- D. when issuing a CREATE TABLE statement after a SELECT statement was issued in the same session
- E. when issuing a SELECT FOR UPDATE statement after a CREATE TABLE AS SELECT statement was issued in the same session
- F. when issuing a TRUNCATE statement after a SELECT statement was issued in the same session
Answer: A,C,E
NEW QUESTION 53
Which two statements are true about Enterprise Manager Database Express? (Choose two.)
- A. The same port number can be used for Database Express configurations for databases on different hosts
- B. It is available only when the database is open
- C. It can be used to switch a database into ARCHIVELOGMODE
- D. The same port number can be used for multiple Database Express configurations for multiple databases on the same host
- E. It can be used to perform database recovery
Answer: C,D
Explanation:
https://docs.oracle.com/en/database/oracle/oracle-database/19/admqs/getting-started-with- database-administration.html#GUID-EB851101-07BE-4038-BB9D-06E01CC7F5D5
NEW QUESTION 54
Which three statements are true about single-row functions? (Choose three.)
- A. They can accept only one argument
- B. The data type returned can be different from the data type of the argument
- C. They return a single result row per table
- D. They can be nested to any level
- E. They can be used only in the WHERE clause of a SELECT statement
- F. The argument can be a column name, variable, literal or an expression
Answer: B,D,F
Explanation:
https://www.tutorialspoint.com/sql_certificate/using_single_row_functions_questions.htm
NEW QUESTION 55
Which two are true about shrinking a segment online? (Choose two.)
- A. It must be in a tablespace that uses Automatic Segment Space Management (ASSM)
- B. To shrink a table it must have a UNIQUE KEY constraint
- C. It is not possible to shrink either indexes or Index Organized Tables (IOTs)
- D. It always eliminates all migrated rows if any exist in the table
- E. To shrink a table it must have row movement enabled
- F. To shrink a table it must have a PRIMARY KEY constraint
Answer: A,E
NEW QUESTION 56
In the ORCL database, UNDOTBS1 is the active undo tablespace with these properties:
1. A size of 100 MB
2. AUTOEXTEND is off
3. UNDO_RETENTION is set to 15 minutes
4. It has RETENTION GUARANTEE
UNDOTBS1 fills with uncommitted undo 10 minutes after the database opens.
What will happen when the next update is attempted by any transaction?
- A. It succeeds and the least recently written undo block of UNDOTBS1 is overwritten by the generated undo.
- B. It succeeds and the generated undo is stored in SYSTEM.
- C. It fails and returns the error message "ORA-30036: unable to extend segment by 8 in undo tablespace 'UNDOTBS1' ".
- D. It succeeds and the least recently read undo block of UNDOTBS1 is overwritten by the generated undo.
- E. It succeeds and the generated undo is stored in SYSAUX.
Answer: A
NEW QUESTION 57
Which two are true about the roles? (Choose two.)
- A. The SET ROLE statement can be used once per session.
- B. The SET ROLE statement enables as well as disables roles in a session.
- C. A role must be disabled before it can be revoked from a user.
- D. The ALTER USER statement must be used to set specific default roles for a user.
- E. All privileges and roles granted to a user are enabled by default when the user logs in.
Answer: B,E
NEW QUESTION 58
Your database instance is started with an SPFILE.
A PFILE is also available. You execute this command:
ALTER SYSTEM SET DB_CACHE_SIZE=100K;
Where Is the value changed?
- A. in the SPFILE and SPFILEc
- B. in the SPFILE, SPFILE, and memory
- C. only In the SPFILE
- D. only in memory
- E. in the SPFILE and in memory
Answer: A
NEW QUESTION 59
Which three statements are true about the naming methods and their features supported by Oracle database used to resolve connection information?
- A. Local naming can be used if Connect-Time Failover Is required.
- B. Directory Naming can be used if Connect-Time Failover is required.
- C. A client can connect to an Oracle database instance even If no client side network admin has been configured.
- D. Easy Connect supports TCP/IP and SSL.
- E. Directory Naming requires setting the TNS_ADMIN environment variable on the client side.
- F. Local Naming requires setting the TNS_ADMIN environment variable on the client side.
Answer: A,C,E
NEW QUESTION 60
Table EMPLOYEES contains columns including EMPLOYEE_ID, JOB_ID and SALARY.
Only the EMPLOYEE_ID column is indexed.
Rows exist for employees 100 and 200.
Examine this statement:
Which two statements are true? (Choose two.)
- A. Employee 100 will have JOB_ID set to the same value as the JOB_ID of employee 200
- B. Employee 200 will have JOB_ID set to the same value as the JOB_ID of employee 100
- C. Employee 100 will have SALARY set to the same value as the SALARY of employee 200
- D. Employees 100 and 200 will have the same JOB_ID as before the update command
- E. Employees 100 and 200 will have the same SALARY as before the update command
- F. Employee 200 will have SALARY set to the same value as the SALARY of employee 100
Answer: B,C
NEW QUESTION 61
Which two are true about complete and incomplete recovery? (Choose two.)
- A. Incomplete recovery is possible only when the database is open.
- B. Uncommitted transactions will be rolled back after incomplete recovery completes.
- C. The database must have FLASHBACK enabled in order to perform incomplete recovery.
- D. Uncommitted transactions will be rolled back after complete recovery completes.
- E. Only incremental backups can be used to roll forward the database while performing complete recovery.
Answer: D,E
NEW QUESTION 62
Which statement is true about database links?
- A. Private database link creation requires the same user to exist in both the local and the remote databases.
- B. A public database link can be used by a user connected to the local database instance to connect to any schema in the remote database instance.
- C. A database link created in a database allows a connection from that database's instance to the target database's Instance, but not vice versa.
- D. A database link can be created only between two Oracle databases.
- E. A public database link can be created only by sys.
Answer: B
NEW QUESTION 63
Which two are true about shrinking a segment online? (Choose two.)
- A. To shrink a table it must have a UNIQUE KEY constraint
- B. It is not possible to shrink either indexes or Index Organized Tables (IOTs)
- C. It always eliminates all migrated rows if any exist in the table
- D. To shrink a table it must have a PRIMARY KEY constraint
- E. It must be in a tablespace that uses Automatic Segment Space Management (ASSM)
- F. To shrink a table it must have row movement enabled
Answer: D,F
Explanation:
Explanation/Reference: https://docs.oracle.com/cd/B19306_01/server.102/b14200/statements_3001.htm
NEW QUESTION 64
Which two statements are true about single row functions? (Choose two.)
- A. CONCAT : can be used to combine any number of values
- B. CEIL : can be used for positive and negative numbers
- C. MOD : returns the quotient of a division operation
- D. TRUNC : can be used to combine any number of values
- E. FLOOR : returns the smallest integer greater than or equal to a specified number
Answer: C,D
NEW QUESTION 65
Which three statements are true about a self join? (Choose three.)
- A. It can be an outer join
- B. The query must use two different aliases for the table
- C. The ON clause can be used
- D. It must be an equijoin
- E. The ON clause must be used
- F. It must be an inner join
Answer: B,C,F
Explanation:
Explanation
NEW QUESTION 66
Which two statements are true about UNDO and REDO? (Choose two.)
- A. DML modifies Oracle database objects and only generates REDO
- B. DML modifies Oracle database objects and only generates UNDO
- C. The generation of UNDO generates REDO
- D. The generation of REDO generates UNDO
- E. DML modifies Oracle database objects and generates UNDO and REDO
Answer: C,D
NEW QUESTION 67
You execute this command:
During the export operation, you detach from the job by using CTRL+C and then execute this command:
Export> STOP_JOB=immediate
Are you sure you wish to stop the job ([yes]/no): yes
Which two statements are true about the job? (Choose two.)
- A. It terminates
- B. You can no longer monitor it
- C. It is paused and can be resumed
- D. You can reattach to it and monitor it
- E. It continues to run in the background
Answer: C,D
NEW QUESTION 68
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