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Q1. Which two statements describe good practices for an application developer to reduce locking conflicts in Oracle database? (Choose two.)
A. Avoid coding unnecessary longrunning transactions.
B. Allow the database to handle locks in default locking mode.
C. Always explicitly code the locks as per the requirement of the application.
D. Allow escalation of row locks to block locks if too many row locks cause problem.
Answer: AB
Q2. You want to access employee details contained in flat files as part of the EMPLOYEE table. You plan to add a new column to the EMPLOYEE table to achieve this.
Which data types would you use for the new column?
A. CLOB
B. BLOB
C. BFILE
D. LONG RAW
Answer: C
Q3. Which two statements are true regarding B-tree index? (Choose two.)
A. The leaf blocks in the index are doubly linked.
B. The leaf node stores a bitmap for each key value.
C. The rows with NULL value in key columns also have entries in the index.
D. The deletion of a row from the table causes a logical deletion in index leaf block and the space becomes available for the new leaf entry.
Answer: AD
Q4. You are working on a database that must be functioning 24 hours a day, 7 days a week. The database is configured in ARCHIVELOG mode.
Which two options do you have for performing user-managed backups? (Choose two.)
A. You can perform consistent backups only.
B. You can perform a complete database backup without shutting down the database instance.
C. You can back up data files only when all data files have the same SCN recorded in the control file.
D. You can back up only those data files whose headers are frozen by using ALTER TABLESPACE BEGIN BACKUP or ALTER DATABASE BEGIN BACKUP commands.
Answer: BD
Q5. Which two statements are true about setting the FAST_START_MTTR_TARGET initialization parameter to a nonzero value? (Choose two.)
A. The MTTR advisor will be disabled
B. Automatic checkpoint tuning will be enabled
C. The value for the LOG_CHECKPOINT_INTERVAL initialization parameter will be override the value for FAST_START_MTTR_TARGET
D. The time taken to recover the instance after the crash is always exactly the same as the value given for the FAST_START_MTTR_TARGET initialization parameter
Answer: BC
Q6. The database instance has the following parameter setting:
OS_AUTHENT_PREFIX = OPS$
OS_ROLES = FALSE
REMOTE_OS_AUTHENT = FALSE
REMOTE_OS_ROLES = FALSE
TIMED_OS_STATISTICS = 0
You have a local operating system user SKD. You create a database user OPS$SKD, and then assign external authentication. The user OPS$SKD has the CREATE SESSION privilege.
What would you achieve by the above process?
A. The database user OPS$SKD will be able to administer the database.
B. The authentication detail for the database user OPS$SKD is recorded in the password file.
C. The local operating system user SKD will be able to access the database instance without specifying the username and password.
D. The database user OPS$SKD has to login with the password of the local operating system user SKD to access the database instance.
Answer: C
Q7. User SCOTT executes the following command on the EMP table but has not issued COMMIT, ROLLBACK, or any data definition language (DDL) command:
SQL> SELECT ename FROM emp
2 WHERE job='CLERK' FOR UPDATE OF empno;
SCOTT has opened another session to work with the database instance.
Which three operations would wait when issued in SCOTT's second session? (Choose three.)
A. LOCK TABLE emp IN SHARE MODE;
B. LOCK TABLE emp IN EXCLUSIVE MODE;
C. UPDATE emp SET sal=sal*1.2 WHERE job='MANAGER'
D. INSERT INTO emp(empno,ename) VALUES (1289,'Harry');
E. SELECT ename FROM emp WHERE job='CLERK' FOR UPDATE OF empno;
Answer: ABE
Q8. View the Exhibit.
You want to create a tablespace to contain objects with block size 16 KB. But while configuring the storage you find that the block size that you can provide is only 8 KB.
Which configuration could have enabled the block selection of 16 KB?
A. Choosing the extent allocation type to uniform
B. Choosing the Segment Space Management option to manual
C. Setting autoextension on for the data file mentioned for the tablespace
D. Setting the DB_16K_CACHE_SIZE parameter for the database instance to a nonzero value
Answer: D
Q9. You have set Tablespace Full Metrics Threshold values for the USERS tablespace as follows:
Warning (%): 90
Critical (%): 95
Which background process is responsible for issuing alerts when the threshold is crossed?
A. System monitor (SMON)
B. Process monitor (PMON)
C. Memory manager process (MMAN)
D. Manageability Monitor process (MMON)
Answer: D
Q10. View the Exhibit. What would happen if Oracle Home is not empty?
A. The installation will not be continued until the location is empty.
B. The installation will proceed without overwriting the existing files.
C. The installation can be continued, but the existing files will be overwritten.
D. The installation terminates automatically after showing an error message.
Answer: A
Q11. Which statement is true about a whole consistent database backup on a database running in ARCHIVELOG mode?
Exhibit:
A. The backup will consist of used data blocks only.
B. The database must be shut down to accomplish the backup.
C. The backup can be accomplished without shutting down the database.
D. The backup will contain all database files that have never been backed up.
Answer: B
Q12. Identify the logical structure that will never have more than one data segment created for it.
A. external table
B. partitioned table
C. partitioned index
D. nonclustered table
E. global temporary table
Answer: D
Q13. Which statement describes the effect on an index, when the indexed column for the rows is updated in the base table?
A. An update in a leaf row takes place.
B. The index becomes invalid after the update.
C. The leaf block containing the row to be updated is marked as invalid.
D. A row in the leaf block of the index for the key value is logically deleted and a new leaf row is inserted.
Answer: D
Q14. A user, who is authenticated externally, logs in to a remote machine and connects to the database instance. What action would you take to ensure that a user cannot connect to the database instance by merely logging in to a remote machine?
A. Set REMOTE_OS_ROLES to FALSE
B. Set OS_ROLES parameter to FALSE
C. Set the REMOTE_OS_AUTHENT parameter to FALSE
D. Set the REMOTE_LOGIN_PASSWORD_FILE parameter to NONE
Answer: C
Q15. See the Exhibit:
Which statements are true regarding the USERS tablespace? (Choose all that apply.)
A. A bitmap is used to record free extents
B. Free extents information is managed within the tablespace
C. Free extents information is managed in the SYSAUX tablespace
D. The data dictionary tables are updated when extents are allocated or deallocated
Answer: AB