Pass4sure offers free demo for 1z0 062 dumps exam. "Oracle Database 12c: Installation and Administration", also known as oracle database 12c installation and administration 1z0 062 pdf exam, is a Oracle Certification. This set of posts, Passing the Oracle 1z0 062 dumps exam, will help you answer those questions. The oracle database 12c installation and administration 1z0 062 pdf Questions & Answers covers all the knowledge points of the real exam. 100% real Oracle 1z0 062 dumps exams and revised by experts!


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Q11. You plan to migrate your database from a File system to Automata Storage Management (ASM) on same platform. 

Which two methods or commands would you use to accomplish this task? 

A. RMAN CONVERT command 

B. Data Pump Export and import 

C. Conventional Export and Import 

D. The BACKUP AS COPY DATABASE . . . command of RMAN 

E. DBMS_FILE_TRANSFER with transportable tablespace 

Answer: A,D 

Explanation: A: 

1. Get the list of all datafiles. 

. Use the convert datafile command to convert the datafile from the file system to ASM. 

Note: RMAN Backup of ASM Storage 

There is often a need to move the files from the file system to the ASM storage and vice versa. This may come in handy when one of the file systems is corrupted by some means and then the file may need to be moved to the other file system. 

D: Migrating a Database into ASM 

* To take advantage of Automatic Storage Management with an existing database you must migrate that database into ASM. This migration is performed using Recovery Manager (RMAN) even if you are not using RMAN for your primary backup and recovery strategy. 

* Example: 

Back up your database files as copies to the ASM disk group. 

BACKUP AS COPY INCREMENTAL LEVEL 0 DATABASE FORMAT '+DISK' TAG 'ORA_ASM_MIGRATION' 

Reference: Migrating Databases To and From ASM with Recovery Manager 


Q12. You plan to implement the distributed database system in your company. You invoke Database Configuration Assistant (DBCA) to create a database on the server. During the installation, DBCA prompts you to specify the Global Database Name. 

What must this name be made up of? 

A. It must be made up of a database name and a domain name. 

B. It must be made up of the value in ORACLE_SID and HOSTNAME. 

C. It must be made up of the value that you plan to assign for INSTANCE_NAME and HOSTNAME. 

D. It must be made up of the value that you plan to assign for ORACLE_SID and SERVICE_NAMES. 

Answer:

Explanation: Using the DBCA to Create a Database (continued) 

3. Database Identification: Enter the Global Database Name in The form database_name.domain_name, and the system identifier (SID). The SID defaults lo the database name and uniquely identifies the instance associated with the database. 

4. Management Options: Use this page to set up your database so that it can be managed with Oracle Enterprise Manager. Select the default: "Configure the Database with Enterprise Manager." Optionally, this page allows you to configure alert notifications and daily disk backup area settings. 

Note: Yon must configure the listener before you can configure Enterprise Manager (as shown earlier). 


Q13. Which statement is true about Enterprise Manager (EM) express in Oracle Database 12c? 

A. By default, EM express is available for a database after database creation. 

B. You can use EM express to manage multiple databases running on the same server. 

C. You can perform basic administrative tasks for pluggable databases by using the EM express interface. 

D. You cannot start up or shut down a database Instance by using EM express. 

E. You can create and configure pluggable databases by using EM express. 

Answer:

Explanation: EM Express is built inside the database. 

Note: Oracle Enterprise Manager Database Express (EM Express) is a web-based database management tool that is built inside the Oracle Database. It supports key performance management and basic database administration functions. From an architectural perspective, EM Express has no mid-tier or middleware components, ensuring that its overhead on the database server is negligible. 


Q14. You upgraded your database from pre-12c to a multitenant container database (CDB) containing pluggable databases (PDBs). 

Examine the query and its output: 

Which two tasks must you perform to add users with SYSBACKUP, SYSDG, and SYSKM privilege to the password file? 

A. Assign the appropriate operating system groups to SYSBACKUP, SYSDG, SYSKM. 

B. Grant SYSBACKUP, SYSDG, and SYSKM privileges to the intended users. 

C. Re-create the password file with SYSBACKUP, SYSDG, and SYSKM privilege and the FORCE argument set to No. 

D. Re-create the password file with SYSBACKUP, SYSDG, and SYSKM privilege, and FORCE arguments set to Yes. 

E. Re-create the password file in the Oracle Database 12c format. 

Answer: B,D 

Explanation: 

* orapwd 

/ You can create a database password file using the password file creation utility, 

ORAPWD. 

The syntax of the ORAPWD command is as follows: 

orapwd FILE=filename [ENTRIES=numusers] [FORCE={y|n}] [ASM={y|n}] 

[DBUNIQUENAME=dbname] [FORMAT={12|legacy}] [SYSBACKUP={y|n}] [SYSDG={y|n}] 

[SYSKM={y|n}] [DELETE={y|n}] [INPUT_FILE=input-fname] 

force - whether to overwrite existing file (optional), 

* v$PWFILE_users / 12c: V$PWFILE_USERS lists all users in the password file, and indicates whether the user has been granted the SYSDBA, SYSOPER, SYSASM, SYSBACKUP, SYSDG, and SYSKM privileges. 

/ 10c: sts users who have been granted SYSDBA and SYSOPER privileges as derived from the password file. 

ColumnDatatypeDescription USERNAMEVARCHAR2(30)The name of the user that is contained in the password file SYSDBAVARCHAR2(5)If TRUE, the user can connect with SYSDBA privileges SYSOPERVARCHAR2(5)If TRUE, the user can connect with SYSOPER privileges 

Incorrect: 

not E: The format of the v$PWFILE_users file is already in 12c format. 


Q15. You run a script that completes successfully using SQL*Plus that performs these actions: 

1. Creates a multitenant container database (CDB) 

2. Plugs in three pluggable databases (PDBs) 

3. Shuts down the CDB instance 

4. Starts up the CDB instance using STARTUP OPEN READ WRITE 

Which two statements are true about the outcome after running the script? 

A. The seed will be in mount state. 

B. The seed will be opened read-only. 

C. The seed will be opened read/write. 

D. The other PDBs will be in mount state. 

E. The other PDBs will be opened read-only. 

F. The PDBs will be opened read/write. 

Answer: B,D 

Explanation: B: The seed is always read-only. 

D: Pluggable databases can be started and stopped using SQL*Plus commands or the ALTER PLUGGABLE DATABASE command. 


Q16. 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? 

A. It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root only. 

B. It fails and reports an error because the CONTAINER=ALL clause is not used. 

C. It excludes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in root and all PDBs. 

D. It fails and reports an error because the CONTAINER=CURRENT clause is not used. 

E. It executes successfully and the CREATE TABLE privilege is revoked from C # # A_ADMIN in all PDBs. 

Answer:

Explanation: REVOKE ..FROM 

If the current container is the root: 

/ Specify CONTAINER = CURRENT to revoke a locally granted system privilege, object privilege, or role from a common user or common role. The privilege or role is revoked from the user or role only in the root. This clause does not revoke privileges granted with CONTAINER = ALL. 

/ Specify CONTAINER = ALL to revoke a commonly granted system privilege, object privilege on a common object, or role from a common user or common role. The privilege or role is revoked from the user or role across the entire CDB. This clause can revoke only a privilege or role granted with CONTAINER = ALL from the specified common user or common role. This clause does not revoke privileges granted locally with CONTAINER = CURRENT. However, any locally granted privileges that depend on the commonly granted privilege being revoked are also revoked. 

If you omit this clause, then CONTAINER = CURRENT is the default. 

Reference: Oracle Database SQL Language Reference 12c, Revoke 


Q17. Your database is open and the listener LISTNENER is up. You issue the command: 

LSNRCTL> RELOAD 

What is the effect of reload on sessions that were originally established by listener? 

A. Only sessions based on static listener registrations are disconnected. 

B. Existing connections are not disconnected; however, they cannot perform any operations until the listener completes the re-registration of the database instance and service handlers. 

C. The sessions are not affected and continue to function normally. 

D. All the sessions are terminated and active transactions are rolled back. 

Answer:


Q18. Which three statements are true about Automatic Workload Repository (AWR)? 

A. All AWR tables belong to the SYSTEM schema. 

B. The AWR data is stored in memory and in the database. 

C. The snapshots collected by AWR are used by the self-tuning components in the database 

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. 

E. AWR contains system wide tracing and logging information. 

Answer: B,C,E 

Explanation: * A fundamental aspect of the workload repository is that it collects and persists database performance data in a manner that enables historical performance analysis. The mechanism for this is the AWR snapshot. On a periodic basis, AWR takes a “snapshot” of the current statistic values stored in the database instance’s memory and persists them to its tables residing in the SYSAUX tablespace. 

* AWR is primarily designed to provide input to higherlevel components such as automatic tuning algorithms and advisors, but can also provide a wealth of information for the manual tuning process. 


Q19. Which two are prerequisites for performing a flashback transaction? 

A. Flashback Database must be enabled. 

B. Undo retention guarantee for the database must be configured. 

C. EXECUTE privilege on the DBMS_FLASHBACK package must be granted to the user flashing back transaction. 

D. Supplemental logging must be enabled. 

E. Recycle bin must be enabled for the database. 

F. Block change tracking must be enabled tor the database. 

Answer: A,C 

Reference: Oracle Database Advanced Application Developer's Guide 11g, Using Oracle Flashback Technology 


Q20. Which two statements are true about the Oracle Direct Network File system (DNFS)? 

A. It utilizes the OS file system cache. 

B. A traditional NFS mount is not required when using Direct NFS. 

C. Oracle Disk Manager can manage NFS on its own, without using the operating kernel NFS driver. 

D. Direct NFS is available only in UNIX platforms. 

E. Direct NFS can load-balance I/O traffic across multiple network adapters. 

Answer: C,E 

Explanation: E: Performance is improved by load balancing across multiple network interfaces (if available). 

Note: 

* To enable Direct NFS Client, you must replace the standard Oracle Disk Manager (ODM) library with one that supports Direct NFS Client. 

Incorrect: Not A: Direct NFS Client is capable of performing concurrent direct I/O, which bypasses any operating system level caches and eliminates any operating system write-ordering locks Not B: 

* To use Direct NFS Client, the NFS file systems must first be mounted and available over regular NFS mounts. 

* Oracle Direct NFS (dNFS) is an optimized NFS (Network File System) client that provides faster and more scalable access to NFS storage located on NAS storage devices (accessible over TCP/IP). Not D: Direct NFS is provided as part of the database kernel, and is thus available on all supported database platforms - even those that don't support NFS natively, like Windows. 

Note: 

* Oracle Direct NFS (dNFS) is an optimized NFS (Network File System) client that provides faster and more scalable access to NFS storage located on NAS storage devices (accessible over TCP/IP). Direct NFS is built directly into the database kernel - just like ASM which is mainly used when using DAS or SAN storage. 

* Oracle Direct NFS (dNFS) is an internal I/O layer that provides faster access to large NFS files than traditional NFS clients.