Latest [Dec 28, 2021] Oracle 1z0-062 Real Exam Dumps PDF
1z0-062 Practice Test Questions Updated 380 Questions
Details for 1Z0-062
Particularly, 1Z0-062 certification test contains a total of about 67 multiple-choice questions that the students have to complete within 2 hours. If you want to pass this exam, you should try to get more than 64% of the correct answers. This Oracle test will cost you $245 and to ace it with flying colors, you should explore its topics first. Thus, here are a few of them:
- Oracle database software upgrade;
- Developing and managing tablespaces;
- Database storage structures and undo data management;
- Introduction to DBAAS.
- Concepts of recovery and backup;
- Oracle network environment configuration;
- User security administration;
The procedure of earning this associate-level Oracle Database certificate expands by all odds the boundaries of candidates' knowledge and applied experience, allowing them to accomplish complicated practical lab tasks on the final test, and then in practice on a daily basis. Meanwhile, Oracle certification tests reveal your potential and measure as well as challenge your capability to reason and act through real questions based on varied scenarios.
NEW QUESTION 34
Your database is running in NOARCHIVLOGmode.
Examine the following parameters:
You execute the following command after performing a STARTUP MOUNT:
SQL> ALTER DATABASE ARCHIVELOG;
Which statement is true about the execution of the command?
- A. It executes successfully and sets the Fast Recovery Area as the local archive destination.
- B. It executes successfully and issues a warning to set LOG_ARCHIVE_DESTwhile opening the database.
- C. It executes successfully and sets $ORACLE_HOME/dbsas the default archive destination.
- D. It fails and returns an error about LOG_ARCHIVE_DESTnot being set.
Answer: A
NEW QUESTION 35
Which two are prerequisites for performing a flashback transaction? (Choose two.)
- A. Block change tracking must be enabled tor the database.
- B. Flashback Database must be enabled.
- C. Undo retention guarantee for the database must be configured.
- D. Supplemental logging must be enabled.
- E. Recycle bin must be enabled for the database.
- F. EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back
transaction.
Answer: C,D
Explanation:
Explanation/Reference:
Explanation:
References: http://searchoracle.techtarget.com/tip/How-to-perform-Oracle-Flashback-Transaction-Queries
https://docs.oracle.com/cd/E11882_01/appdev.112/e41502/adfns_flashback.htm#ADFNS610
NEW QUESTION 36
You administer an online transaction processing (OLTP) system whose database is stored in Automatic Storage Management (ASM) and whose disk group use normal redundancy.
One of the ASM disks goes offline, and is then dropped because it was not brought online before DISK_REPAIR_TIME elapsed.
When the disk is replaced and added back to the disk group, the ensuing rebalance operation is too slow.
Which two recommendations should you make to speed up the rebalance operation if this type of failure happens again? (Choose two.)
- A. Increase the number of DBWR_IO_SLAVES in the ASM instance.
- B. Specify the statement that adds the disk back to the disk group.
- C. Increase the number of ASMB processes.
- D. Set the DISK_REPAIR_TIME disk attribute to a lower value.
- E. Increase the value of the ASM_POWER_LIMIT parameter.
Answer: C,E
Explanation:
Explanation
A: ASM_POWER_LIMIT specifies the maximum power on an Automatic Storage Management instance for disk rebalancing. The higher the limit, the faster rebalancing will complete. Lower values will take longer, but consume fewer processing and I/O resources.
D:
* Normally a separate process is fired up to do that rebalance. This will take a certain amount of time. If you want it to happen faster, fire up more processes. You tell ASM it can add more processes by increasing the rebalance power.
* ASMB
ASM Background Process
Communicates with the ASM instance, managing storage and providing statistics Incorrect:
Not B: A higher, not a lower, value of DISK_REPAIR_TIME would be helpful here.
Not E: If you implement database writer I/O slaves by setting the DBWR_IO_SLAVES parameter, you configure a single (master) DBWR process that has slave processes that are subservient to it. In addition, I/O slaves can be used to "simulate" asynchronous I/O on platforms that do not support asynchronous I/O or implement it inefficiently. Database I/O slaves provide non-blocking, asynchronous requests to simulate asynchronous I/O.
NEW QUESTION 37
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?
- A. It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_TARGET.
- B. It fails because the DB_8K_CACHE_SIZE parameter cannot be changed dynamically.
- C. It fails because an increase in DB_8K_CACHE_SIZE cannot be accommodated within SGA_MAX_SIZE.
- D. It succeeds only if memory is available from the autotuned components if SGA.
Answer: C
Explanation:
* The SGA_TARGET parameter can be dynamically increased up to the value specified for the SGA_MAX_SIZE parameter, and it can also be reduced.
*Example:
For example, suppose you have an environment with the following configuration:
SGA_MAX_SIZE = 1024M SGA_TARGET = 512M DB_8K_CACHE_SIZE = 128M In this example, the value of SGA_TARGET can be resized up to 1024M and can also be reduced until one or more of the automatically sized components reaches its minimum size. The exact value depends on environmental factors such as the number of CPUs on the system. However, the value of DB_8K_CACHE_SIZE remains fixed at all times at 128M
*DB_8K_CACHE_SIZE Size of cache for 8K buffers
*For example, consider this configuration:
SGA_TARGET = 512M DB_8K_CACHE_SIZE = 128M In this example, increasing DB_8K_CACHE_SIZE by 16 M to 144M means that the 16M is taken away from the automatically sized components. Likewise, reducing DB_8K_CACHE_SIZE by 16M to 112M means that the 16M is given to the automatically sized components.
NEW QUESTION 38
Examine the query and its output executed In an RDBMS Instance:
Which three statements are true about the users (other than sys) in the output? (Choose three.)
- A. The C # # C_ADMIN user can perform the data guard operation with Data Guard Broker.
- B. The C # # B_ADMIN user can perform all backup and recovery operations using RMAN or SQL* Plus.
- C. The C # # A_ADMIN user can perform wallet operations.
- D. The C # # B_ADMIN user can perform all backup and recovery operations using RMAN only.
- E. The C # # D_ADMIN user can perform backup and recovery operations for Automatic Storage Management (ASM).
Answer: A,B,E
Explanation:
Explanation/Reference:
Explanation:
B: SYSDG administrative privilege has ability to perform Data Guard operations (including startup and shutdown) using Data Guard Broker or dgmgrl.
D: SYSASM
The new (introduced in 11g) SYSASM role to manage the ASM instance, variable extent sizes to reduce shared pool usage, and the ability of an instance to read from a specific disk of a diskgroup E (Not A): SYSDBA is like a role in the sense that it is granted, but SYSDBA is a special built-in privilege to allow the DBA full control over the database Incorrect:
Not C: SYSKM. SYSKM administrative privilege has ability to perform transparent data encryption wallet operations.
Note:
Use the V$PWFILE_USERS view to see the users who have been granted administrative privileges.
NEW QUESTION 39
You determine that database performance is sub-optimal due to hard parsing statements. Automatic Shared Memory Management (ASMM) is disabled for your database instance.
Which tool would you use to get advice on how to improve performance?
- A. Memory Advisor for the PGA
- B. SQL Access Advisor
- C. Memory Advisor for the shared pool
- D. SQL Tuning Advisor
Answer: C
Explanation:
Explanation/Reference:
References: http://docs.oracle.com/cd/E25178_01/server.1111/e10897/montune.htm#CHDGFCFJ
NEW QUESTION 40
In your multitenant container database (CDB) containing pluggable database (PDBs), the HR user executes the following commands to create and grant privileges on a procedure:
CREATE OR REPLACE PROCEDURE create_test_v (v_emp_id NUMBER, v_ename VARCHAR2, v_SALARY NUMBER, v_dept_id NUMBER)
BEGIN
INSERT INTO hr.test VALUES (V_emp_id, V_ename, V_salary, V_dept_id);
END;
/
GRANT EXECUTE ON CREATE_TEST TO john, jim, smith, king;
How can you prevent users having the EXECUTE privilege on the CREATE_TEST procedure from inserting values into tables on which they do not have any privileges?
- A. Create the CREATE_TEST procedure as part of a package and grant users the EXECUTE privilege the package.
- B. Grant the EXECUTE privilege to users with GRANT OPTION on the CREATE_TEST procedure.
- C. Create the CREATE_TEST procedure with invoker’s rights.
- D. Create the CREATE_TEST procedure with definer’s rights.
Answer: C
Explanation:
Explanation/Reference:
Explanation:
If a program unit does not need to be executed with the escalated privileges of the definer, you should specify that the program unit executes with the privileges of the caller, also known as the invoker. Invoker's rights can mitigate the risk of SQL injection.
Incorrect:
Not A: By default, stored procedures and SQL methods execute with the privileges of their owner, not their current user. Such definer-rights subprograms are bound to the schema in which they reside.
not B: Using the GRANT option, a user can grant an Object privilege to another user or to PUBLIC.
NEW QUESTION 41
Which action takes place when a file checkpoint occurs?
- A. 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.
- B. The checkpoint position is advanced in the checkpoint queue.
- C. The Database Writer process (DBWn) writes all dirty buffers in the buffer cache to data files.
- D. The Log Writer process (LGWR) writes all redo entries in the log buffer to online redo log files.
Answer: A
Explanation:
Explanation/Reference:
NEW QUESTION 42
Which two statements correctly describe the relationship between data files and logical database structures?
(Choose two.)
- A. The size of an Oracle data block in a data file should be the same as the size of an OS block.
- B. A data file can belong to only one tablespace.
- C. A segment cannot span data files.
- D. An extent cannot span data files.
Answer: B,D
Explanation:
A single extent can never span data files.
https://docs.oracle.com/database/121/CNCPT/logical.htm#CNCPT1095
NEW QUESTION 43
You administer an online transaction processing (OLTP) system whose database is stored in Automatic Storage Management (ASM) and whose disk group use normal redundancy.
One of the ASM disks goes offline, and is then dropped because it was not brought online before DISK_REPAIR_TIME elapsed.
When the disk is replaced and added back to the disk group, the ensuing rebalance operation is too slow.
Which two recommendations should you make to speed up the rebalance operation if this type of failure happens again? (Choose two.)
- A. Increase the number of DBWR_IO_SLAVES in the ASM instance.
- B. Specify the statement that adds the disk back to the disk group.
- C. Increase the number of ASMB processes.
- D. Set the DISK_REPAIR_TIME disk attribute to a lower value.
- E. Increase the value of the ASM_POWER_LIMIT parameter.
Answer: C,E
Explanation:
Explanation/Reference:
Explanation:
A: ASM_POWER_LIMIT specifies the maximum power on an Automatic Storage Management instance for disk rebalancing. The higher the limit, the faster rebalancing will complete. Lower values will take longer, but consume fewer processing and I/O resources.
D:
* Normally a separate process is fired up to do that rebalance. This will take a certain amount of time. If you want it to happen faster, fire up more processes. You tell ASM it can add more processes by increasing the rebalance power.
* ASMB
ASM Background Process
Communicates with the ASM instance, managing storage and providing statistics Incorrect:
Not B: A higher, not a lower, value of DISK_REPAIR_TIME would be helpful here.
Not E: If you implement database writer I/O slaves by setting the DBWR_IO_SLAVES parameter, you configure a single (master) DBWR process that has slave processes that are subservient to it. In addition, I/O slaves can be used to "simulate" asynchronous I/O on platforms that do not support asynchronous I/O or implement it inefficiently. Database I/O slaves provide non-blocking, asynchronous requests to simulate asynchronous I/O.
NEW QUESTION 44
In your Oracle 12c database, you invoke SQL *Loader Express Mode command to load data:
$> sqlldr hr/hr table=employees
Which two statements are true about this command? (Choose two.)
- A. It succeeds and creates theEMPLOYEEStable in theHRschema if the table does not exist.
- B. It fails because the SQL *Loader data file location is not specified.
- C. It succeeds even if theHRuser does not have theCREATE DIRECTORYprivilege.
- D. It fails because the SQL *Loader controlfile location is not specified.
- E. It succeeds with default settings if theEMPLOYEEStable belonging to theHRschema is already defined in the database.
Answer: C,E
NEW QUESTION 45
You want to schedule a job to rebuild a table’s indexes after a bulk insert, which must be scheduled as soon as a file containing data arrives on the system.
What would you do to accomplish this?
- A. Create an event-based job for the file arrival event, then create a job for bulk insert, and then create a job to rebuild indexes.
- B. Create a file watcher for the bulk inserts and then create a job to rebuild indexes.
- C. Create a file watcher and an event-based job for bulk insert and then create another job to rebuild indexes on the table.
- D. Create a job array and add a job for bulk insert and a job to rebuild indexes to the job array.
Answer: C
NEW QUESTION 46
Which statement is true regarding the DEFAULT profile?
- A. It canbe dropped and recreated.
- B. A different DEFAULT profile can be created before each user in a database.
- C. it must be explicitly assigned to the user.
- D. The values assigned to the resource limits and password parameters in the default profile can be altered.
Answer: D
NEW QUESTION 47
Which statement is true about using the Database Upgrade Assistant (DBUA) to upgrade your database from Oracle Database 11g to Oracle Database 12c?
- A. It automatically makes necessary changes to Oracle environment variables.
- B. It automatically enables unified auditing in the upgraded database.
- C. It terminates if the SYSTEM tablespace in the source database is not autoextensible.
- D. It automatically adds new data files if there is not enough disk space to grow.
Answer: D
Explanation:
Explanation
References: https://docs.oracle.com/cd/E18283_01/server.112/e17222/upgrade.htm#insertedID5
NEW QUESTION 48
A database instance is started by using an SPFILE. The database is configured in
ARCHIVELOG mode and the control file autobackup is configured. Daily full database backups are performed by using RMAN.
You lost all control files due to media failure.
Given the steps to recover from the error in random order:
1 . Shut down the instance, if it is not already down.
2 . Restore the control file from autobackup to a new location.
3 . Start the database instance to NOMOUNT state.
4 . Recover the database to the point of failure of the control file.
5 . Open the database with the RESETLOGS option.
6 . Mount the database.
7 . Update the SPFILE with the new location of the control file by using the ALTER
SYSTEM command.
Identify the correct sequence of the required steps.
- A. 1, 3, 2, 4, 5
- B. 1, 2, 6, 4, 5
- C. 1, 3, 7, 2, 6, 4, 5
- D. 1, 3, 2,6, 7, 4, 5
- E. 1, 6, 2, 4, 5
Answer: A
NEW QUESTION 49
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