Overview Course - Oracle DBA
Comprehensive Oracle DBA: Installation, Configuration, Building, Managing, Securing Databases. Prepare for Oracle DBA Certification and Oracle jobs.- 30% Started a new career
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This is an overview course on Oracle DBA while the complete detailed-level Oracle DBA course is available at - https://training.uplatz.com/online-it-course.php?id=oracle-dba-57
Oracle DBAs (Database Administrators) handle capacity planning, evaluate database server hardware, and manage all aspects of an Oracle database including installation, configuration, design, and data migration. Additional responsibilities include performance monitoring, security, backups, troubleshooting, and data recovery. An Oracle DBA (Database Administrator) is a technical professional specializing in the management, maintenance, and optimization of Oracle databases. They are responsible for the overall health, performance, security, and availability of these databases.
How does an Oracle DBA work?
1. Installation and Configuration: DBAs set up new Oracle database software and configure it to meet the organization's specific needs. This includes creating databases, setting up security parameters, and optimizing system resources.
2. Maintenance and Upgrades: DBAs apply patches, updates, and upgrades to the database software to keep it secure and up-to-date. They also perform regular maintenance tasks like checking for errors, optimizing performance, and ensuring data integrity.
3. Performance Tuning: DBAs monitor database performance, analyze query execution plans, and identify bottlenecks. They then implement optimization strategies to improve query response times, resource utilization, and overall system efficiency.
4. Security: DBAs implement and maintain security measures to protect the database from unauthorized access, data breaches, and other threats. This involves managing user accounts, permissions, authentication, and encryption.
5. Backup and Recovery: DBAs create and maintain regular backups of the database to protect against data loss due to hardware failure, human error, or other disasters. They also develop and test recovery plans to restore the database quickly in case of failure.
6. Troubleshooting: DBAs are responsible for diagnosing and resolving any issues that arise with the database, such as errors, performance problems, or unexpected behavior.
7. Capacity Planning: DBAs monitor database usage and growth trends to forecast future resource needs and ensure the database can scale to meet increasing demands.
Tools and Technologies
Oracle DBAs use various tools and technologies to carry out their responsibilities:
1. Oracle Enterprise Manager (OEM): A comprehensive management tool for monitoring, administering, and troubleshooting Oracle databases.
2. SQL Developer: An integrated development environment (IDE) for working with SQL and PL/SQL code, allowing DBAs to write and execute queries, create database objects, and manage data.
3. Oracle RMAN (Recovery Manager): A backup and recovery tool that simplifies the process of creating and managing database backups, ensuring data can be restored in case of failures.
4. Performance Monitoring Tools: Tools like Oracle AWR (Automatic Workload Repository) and ASH (Active Session History) provide insights into database performance, helping DBAs identify and resolve bottlenecks.
To become a successful Oracle DBA it is important to understand the core database concepts, role of a Database Administrator, SQL and PL/SQL concepts, physical and logical structure of database, tablespace, configuring and managing the Oracle Network, database configuration and programming, installation, harnessing cloud and storage management, database best practices and scripts.
In the Oracle DBA course you will learn how to install, administer and maintain an Oracle 12c database in an effective and efficient manner, interaction among Oracle components, an understanding of Oracle's architecture and user management.
Course/Topic - Oracle DBA overview - all lectures
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This video comprehends the terms Oracle Database which is an object-relational database management system developed and marketed by Oracle Corporation. Oracle Database is commonly referred to as Oracle RDBMS or simply Oracle.
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In this tutorial you will know about the Oracle Database creates and manages information that is used to roll back, or undo, changes to the database. Such information consists of records of the actions of transactions, primarily before they are committed. These records are collectively referred to as undo.
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In this tutorial we will learn about the Locking which protect table when several users are accessing the same table. Locking is a concurrency control technique in oracle. It helps in data integrity while allowing maximum concurrency access to data. Oracle offers automatic locking whenever situation requires.
The objective of this Oracle DBA course is to provide learners with a thorough understanding of Oracle Database Administration, equipping them with the skills to install, configure, and maintain Oracle databases effectively. Participants will gain hands-on experience with essential tasks such as database creation, backup and recovery, performance tuning, and security management. By the end of the course, learners will be adept at managing Oracle databases, ensuring their stability and performance, and addressing complex administrative challenges to support critical business operations.
Key Course Objectives
· Understand the Oracle Database architecture and its components.
· Install and configure Oracle Database software.
· Create and manage Oracle Database instances.
· Implement Oracle Database security features.
· Perform backup and recovery operations using Oracle Recovery Manager (RMAN).
· Monitor and optimize database performance.
· Implement data partitioning and indexing strategies.
· Manage database storage structures, including tablespaces and data files.
· Configure and manage Oracle networking components.
· Automate database management tasks using Oracle Enterprise Manager (OEM) and scripting.
· Apply patches and perform database upgrades.
· Implement Oracle Data Guard for high availability and disaster recovery.
· Use Oracle Flashback technology for data recovery.
· Manage user accounts and privileges.
· Perform database cloning and migration.
· Understand and implement Oracle ASM (Automatic Storage Management).
· Configure and manage Oracle Grid Infrastructure.
· Utilize Oracle tools and utilities for database management and troubleshooting.
· Develop a comprehensive maintenance plan for Oracle Databases.
· Ensure compliance with database security best practices and regulations.
Introduction to DBMS
· What is a database?
· History of Oracle database
· Role of a Database Administrator
Introduction to Linux
· History of Linux
· Components of Linux
· Linux Basic Commands
· File permission to users
Basic SQL
· What are DML, DDL and DCL Statement
· Examples on DML, DDL and DCL
· Creation of Table, Views, Sequence, Synonyms & Index
Oracle Database Architecture
· Detail explanation on components of an Oracle database architecture
· Oracle database memory and process architecture
Installing Oracle database software (11g R2)
· Pre-requisites for a successful Oracle software installation
· Installation of oracle software using GUI and Manual Method
· Installation of Oracle 11g R2 database software
Oracle Database Creation
· Introduction
· Planning for an Oracle database creation
· Creating an Oracle database using the MANUAL method
· Creating an Oracle database using the GUI Tool (DBCA)
· Startup and Shutdown Methods
· Best practices using OFA for database creation
Database Storage Management
· Introduction
· Tablespaces creation methods
· Datafiles creation methods
· How to resize/rename the tablespace/datafiles
· How to Change the location of datafiles
· Redolog file architecture and best practices
· How to resize/rename the redolog file
· Benefits of Archiving, how to enable/disable Archivelog mode for a database
· Temporary tablespaces and temporary tablespace groups
Oracle Networking
· Oracle listener & TNS configuration using NETMGR
· Managing & Distributing by using DB-link concept
· Oracle database connections from other systems
· Oracle Shared server Dispatcher & Architecture
User Administration and Security
· Create database users
· Database resource management (User’s Profile and Role)
· Locking/unlocking a user account
· User’s password management
User Managed Backup and Recovery
· Introduction: Backup and Recovery Strategy for user managed backup
· How to backup an Oracle database using COLD BACKUP
· How to backup an Oracle database using HOT BACKUP
· Recovery scenarios using User managed backup
RMAN Backup and Recovery
· RMAN backup of Database, controlfile,Archivelogfiles
· Database backup using RMAN with normal and compressed mode
· Database backup using catalog and no-catalog and virtual catalog
· Querying the backup details using Catalog database
· Benefits of Fast Recovery Area using RMAN backup for storage
· How to backup incremental database
· Recovery scenarios using RMAN
· Tablespace Point in time recovery (TSPITR)
Oracle Datapump {Logical backup & Restore}
· Introduction on Datapump(Expdp,Impdp) Utilities
· Benefits of Logical backup & Physical backup
· Exporting/Importing Tables, Schema Tablespace
· database and Transportable tablespace
· Backup methods using datapump
Flashback Feature
· Types of flashback and their benefits
· Flashback Query, Flashback Table to past time
· Flash back of Recovering Drop tables
· Flashback Archive
Oracle Enterprise Manager (grid Control)
· Introduction
· How to install and configure
· Monitor databases and performance of the databases
Cloning
· Cloning database using RMAN from Active Database
· Cloning database using same datafile storage locations and different datafile
· storage locations
Logminer and SQL Loader
· Reading/Extracting the content of Redologs (Online/Archived)
Oracle Dbase Patching/Patch Management
· Downloading/Applying Interim & Patchset patches using Opatch
· Applying cpu and psu patches
· Oracle DBase Upgradation and Migration
· Upgrating database from 11g to 12c version
Oracle Data Guard
· Oracle Dataguard Architecture
· Creation of physical standby database using RMAN and Manual Method
· How to configure Active standby database and snapshot standby database
· Data guard Modes and Switchover/Failover
· Scenarios on restore and recovery
Oracle Automatic Storage Management (ASM)
· Setup ASM by using Grid Infrastructure Utility
· Database Migration from Non-ASM to ASM
Oracle Database Performance Tuning
· Basic overview on PT and troubleshooting
· Routine Day-to-Day Health Management tasks
· Introduction on Proactive & reactive Tuning
· Diagnostic tools such as Alert logfile, Trace file, TKPROF
· AWR Report, ADDM Report and ASH Report
Oracle 12c New Features
· Introduction, Architecture, Installation & Creation of DBase
· Multi-Tenancy Database (PDB,CDBs)
· SQL Statement & Table level recovery(TPITR) in RMAN
· Creating a user, Tablesapce & In-memory Area
Oracle RAC
· Basic Introduction & overview on RAC
Additional Support
· Resume Preparation
· Study Material
· Interview Questions based on the topics
· Mock interview
The full Oracle DBA training course is designed to help you master the Database Administration. The Oracle DBA course will also help the learners to clear the Oracle certified Database Administrator Examination.
The Oracle DBA overview course will provide you knowledge about online oracle database architecture, database processes and backup procedure. The learners get to know the benefits of Oracle DBA and to handle large amount of data with no errors.
The Oracle Database Administrator gain proficiency in understanding the capability to provide industry support for online back and restoration. The Database Administrator develops the knowledge and skills related to database features.
Uplatz online training ensures the participants to successfully go through the Oracle DBA Overview course training.
Course Completion Certificate will be awarded by Uplatz upon the completion of the Oracle DBA Publisher Overview course training.
The Oracle DBA certification exam validates that the participants possess the basic technical concepts and skills a Database administrator position should require for day to day management and maintenance.
Below given are the Certification details of Oracle Database 12C Administration
· Certification Level: Associate
· Exam Name: Oracle Database 12C Administration
· Exam Code: 1Z0-062
· Exam Mode: Online
· Total Number of Questions: 67
· Pass Score: 64%
· Time Duration: 120 Minutes
· Exam Price: $330
The Oracle Database Administrator draws an average salary of $120,266 per year depending on the skill, knowledge and hands-on practice.
The Oracle Database Administrators have major demand in global-based companies and MNCs. The Oracle Database Administrator is responsible for overall Database management and maintenance, manage capacity planning, troubleshooting and system recovery.
The Oracle DBA overview course is ideally designed for developers, database administrators and data center support engineers who wants to become as a Oracle certified database administrator.
After pursuing the complete Oracle DBA certification course the participants can pursue a wide range of career paths.
The following are the job titles:
· Oracle DBA Developer
· Database Administrator
· Oracle 12C Administrator
· Oracle Developer
· Oracle DBA Associate
The database professionals can manage any kind of critical systems.
1) How many memory layers are in the shared pool?
The shared pool portion of the SGA contains three major areas: library cache(contains parsed sql statements,cursor information,execution plans), dictionary cache (contains cache -user account information,priveleges information,datafile,segment and extent information), buffers for parallel execution messages, and control structure.
2) How do you find out from the RMAN catalog if a particular archive log has been backed-up?
list archivelog all;
3) How can you tell how much space is left on a given file system and how much space each of the file system’s subdirectories take-up?
df -kh and du-sh
4) Define the SGA and:
i) How you would configure SGA for a mid-sized OLTP environment?
ii) What is involved in tuning the SGA?
SGA: The System Global Area (SGA) is a group of shared memory areas that are dedicated to an Oracle “instance” (an instance is your database programs and RAM). All Oracle processes use the SGA to hold information. The SGA is used to store incoming data (the data buffers as defined by thedb_cache_size parameter), and internal control information that is needed by the database. You control the amount of memory to be allocated to the SGA by setting some of the Oracle “initialization parameters”. These might include db_cache_size, shared_pool_size and log_buffer.
i) 40% of RAM can be used for sizing SGA rest is reserved for OS and others in 64 bit machine and in 32 bit machine max SGA configured can be 1.5GB only.
ii) Check the statspack report. Check hit ratio of Data buffer. If it is less than 90%, then we need to increase the Data buffer. Check hit ratio of Shared pool. If it is less than 95%, then we need to increase the Shared pool. Check log buffer. If redo buffer allocation retries/redo entries is greater than 1%, then we need to increase log_buffer.
5) What is the cache hit ratio, what impact does it have on performance of an Oracle database and what is involved in tuning it?
Buffer cache hit ratio: It calculates how often a requested block has been found in the buffer cache without requiring disk access. This ratio is computed using data selected from the dynamic performance view V$SYSSTAT. The buffer cache hit ratio can be used to verify the physical I/O as predicted by V$DB_CACHE_ADVICE.
sql> select name, value From v$sysstat Where name in (‘db block gets’, ‘consistent gets’, ‘physical reads’);
The cache-hit ratio can be calculated as follows: Hit ratio = 1 – (physical reads / (db block gets + consistent gets)) If the cache-hit ratio goes below 90% then: increase the initialisation parameter DB_CACHE_SIZE.
Library cache hit ratio: It calculates how often the parsed representation of the statement can be reused. It also known as soft parse.
sql> select namespace, pins, pinhits, reloads, invalidations from v$librarycache order by namespace;
Library Cache Hit Ratio = sum(pinhits) / sum(pins)
Dictionary cache hit ratio:It is a measure of the proportion of requests for information from the data dictionary, the collection of database tables and views containing reference information about the database, its structures, and its users. On instance startup, the data dictionary cache contains no data, so any SQL statement issued is likely to result in cache misses. As more data is read into the cache, the likelihood of cache misses should decrease. Eventually the database should reach a "steady state" in which the most frequently used dictionary data is in the cache.
6) Other than making use of the statspack utility, what would you check when you are monitoring or running a health check on an Oracle 8i or 9i database?
Daily Monitoring activities and check different logs for any sort of errors.
7) How do you tell what your machine name is and what is its IP address?
hostname, uname -n and ifconfig
8) How would you go about verifying the network name that the local_listener is currently using?
lsnrctl stat or ps-eaf|grep tns
9) You have 4 instances running on the same UNIX box. How can you determine which shared memory and semaphores are associated with which instance?
SQL> oradebug setmypid
SQL> oradebug ipc
SQL>oradebug tracfile_name
Also you can check the spfile. The parameters will start with instance_name. parameter_name naming.
10) What view(s) do you use to associate a user’s SQLPLUS session with his o/s process?
v$process and v$session
sql> select a.spid from v$process a, v$session b where a.addr = b.addr and b.audsid=userenv(‘sessionid’);
11) What is the recommended interval at which to run statspack snapshots, and why?
Should be in minutes (15-20 mins approx) because where the time between the two snapshots is measured in hours, the events that caused serious performance issues for 20 minutes during peak processing don’t look so bad when they’re spread out over an 8-hour window. It’s also true with STATSPACK that measuring things over too long of a period tends to level them off over time. Nothing will stand out and strike you as being wrong.
12) What spfile/init.ora file parameter exists to force the CBO to make the execution path of a given statement use an index, even if the index scan may appear to be calculated as more costly?
OPTIMIZER_INDEX_COST_ADJ= FORCE
13) Assuming today is Monday, how would you use the DBMS_JOB package to schedule the execution of a given procedure owned by SCOTT to start Wednesday at 9AM and to run subsequently every other day at 2AM.
dbms_job.submit(:jobno,'statspack.snap;',trunc(sysdate)+9/24,'trunc(SYSDATE+1/24,''HH'')', TRUE, :instno);
14) How would you edit your CRONTAB to schedule the running of /test/test.sh to run every other day at 2PM?
00 02 * * * /test/test.sh
15) In which dictionary table or view would you look to determine at which time a snapshot or MVIEW last successfully refreshed?
SQL> SELECT MVIEW_NAME,LAST_REFRESH_DATE from USER_MVIEWS;
16) How would you best determine why your MVIEW couldn’t FAST REFRESH?
Possibly by checking the MVIEW LOG for errors.
17) How would you begin to troubleshoot an ORA-3113 error?
End of File Communication Error. Check Alert Logfile. CheckNetwrok Latency. Check sqlnet.ora file has expire_time = 0, delete unwanted files and check the swap and temp spaces.
18) Which dictionary tables and/or views would you look at to diagnose a locking issue?
v$lock, v$session, v$process
19) An automatic job running via DBMS_JOB has failed. Knowing only that “it’s failed”, how do you approach troubleshooting this issue?
Check the log and possible reason for the JOB failed.
20) How would you extract DDL of a table without using a GUI tool?
select dbms_metadata.get_ddl('OBJECT','OBJECT_NAME') from dual;
21) You’re getting high “busy buffer waits” - how can you find what’s causing it?
Buffer busy wait means that the queries are waiting for the blocks to be read into the db cache.There could be the reason when the block may be busy in the cache and session is waiting for it. It could be undo, data block or segment header wait.
Run the following query to find out the p1,p2 and p3 of a session causing buffer busy wait
sql> select p1 "File #",p2 "Block #",p3 "Reason Code" from v$session_wait where event = 'buffer busy waits';
After that running the following query to find the segment causing buffer busy wait:-
sql> select owner,segment_name,segment_type from dba_extents where file_id = &P1 and &P2 between block_id and block_id + blocks -1;
22) What query tells you how much space a tablespace named “test” is taking up, and how much space is remaining?
SET SERVEROUTPUT ON
SET LINESIZE 1000
SET FEEDBACK OFF
rem column dummy noprintcolumn pct_used format 999.9 heading "%|Used"
column name format a25 heading "Tablespace Name"
column Kbytes format 999,999,999 heading "MBytes"
column used format 999,999,999 heading "Used(MB)"
column free format 999,999,999 heading "Free(MB)"
column largest format 999,999,999 heading "Largest"
break on report
compute sum of kbytes on report
compute sum of free on report
compute sum of used on report
set pagesize 100
select nvl(b.tablespace_name,
nvl(a.tablespace_name,'UNKOWN')) name,(kbytes_alloc/1024) kbytes,
((kbytes_alloc-nvl(kbytes_free,0))/1024) used,(nvl(kbytes_free,0)/1024) free,
((kbytes_alloc-nvl(kbytes_free,0))/kbytes_alloc)*100 "%used",
nvl(largest,0)/1024 largest
from ( select sum(bytes)/1024 Kbytes_free,
max(bytes)/1024 largest, tablespace_name
from sys.dba_free_space group by tablespace_name ) a,
( select sum(bytes)/1024 Kbytes_alloc, tablespace_name
from sys.dba_data_files group by tablespace_name )b
where a.tablespace_name (+) = b.tablespace_name
order by 1
/
23) Database is hung. Old and new user connections alike hang on impact. What do you do? Your SYS SQLPLUS session is able to connect.
Log into the system and find whether there are any deadlocks in the system using the following query.
select 'SID ' || l1.sid ||' is blocking ' || l2.sid blocking
from v$lock l1, v$lock l2
where l1.block =1 and l2.request > 0
and l1.id1=l2.id1
and l1.id2=l2.id2
/
If so kill the processes caught in deadlock
alter system kill session 'SID,SERIAL#' immediate;
Also find out which wait events exist in the system using following commands and go in detail as to what events are causing these waits and take appropriate actions.
select event,count(*) from v$session group by event
/
select u.sid,u.serial#, u.username,p.spid,to_char(u.logon_time,'DD-MON-YYYY:HH24:MI:SS') from v$session u, v$session w,v$process p where u.sid = w.sid and w.event like '%&a%' and u.paddr = p.addr
/
24) Database crashes. Corruption is found scattered among the file system neither of your doing nor of Oracle’s. What database recovery options are available? Database is in archive log mode.
First of all secure all the archives and all the backups you have on the tape or other system. Then run fschk to check the filesystem. If the corruption is detected at the filesystem level and is not recoverable by fschk format the file system and restore the database through RMAN.
25) How do you increase the OS limitation for open files (LINUX and/or Solaris)?
Set the file-max parameter is /etc/sysctl.conf to the number you want.Save the file and execute it by using command /etc/sysctl.conf-p
26) Provide an example of a shell script which logs into SQLPLUS as SYS, determines the current date, changes the date format to include minutes & seconds, issues a drop table command, displays the date again, and finally exits.
export ORACLE_BASE=/oracle
export ORACLE_HOME=/oracle/ora10g
export ORACLE_SID=ora10g
export path=$ORACLE_HOME/lib
sqlplus sys as sysdba << EOF
@/oracle/date.sql
exit;
Now the contents of /oracle/date.sql
select SYSDATE from dual;
select to_char(SYSDATE,'dd-mon-yyyy hh24:mi:ss') from dual;
drop table tablename cascade constraints;
select to_char(SYSDATE,'dd-mon-yyyy hh24:mi:ss') from dual;
27) Explain how you would restore a database using RMAN to Point in Time?
restore database
until time "to_date('Aug 27 2001 02:00:00','Mon DD YYYY HH24:MI:SS')";
recover database
28) How does Oracle guarantee data integrity of data changes?
It enables you to define and enforce data integrity constraints like PRIMARY KEY CONSTRAINTS, FOREIGN KEY CONSTRAINTS and UNIQUE CONSTRAINTS.
29) Which environment variables are absolutely critical in order to run the OUI?
ORACLE_BASE, ORACLE_HOME, ORACLE_SID,path and library path
30) What SQL query from v$session can you run to show how many sessions are logged in as a particular user account?
select count(1) from v$session where USERNAME='username';
31) TABLESPACE is not specified for a user?
a. TEMP
b. DATA
c. SYSTEM
d. ROLLBACK
Answer: c
32) User SCOTT creates an index with this statement: CREATE INDEX emp_indx on employee (empno). In which tablespace would be the index created?
a. SYSTEM tablespace
b. SCOTTS default tablespace
c. Tablespace with rollback segments
d. Same tablespace as the EMPLOYEE table.
Answer: b
33) Which data dictionary view shows the available free space in a certain tablespace?
A. DBA_EXTENTS
B. V$FREESPACE
C. DBA_FREE_SPACE
D. DBA_TABLESPACE
E. DBA_FREE_EXTENTS
Answer: C
34) Which method increase the size of a tablespace?
A. Add a datafile to a tablespace.
B. Use the ALTER TABLESPACE command to increase the MINEXTENTS for the tablespace.
C. Use the ALTER TABLESPACE command to increase the MAXEXTENTS for the tablespace.
D. Use the ALTER TABLESPACE command to increase the MINIMUM EXTENT for the tablespace.
Answer: A
35) What does the command ALTER DATABASE . . . RENAME DATAFILE do?
A. It copies a data file.
B. It updates the control file.
C. It copies a data file and updates the control file.
D. It copies a data file, deletes the obsolete file, and updates the control file.
Answer: B
36) Can you drop objects from a read-only tablespace?
A. No
B. Yes
C. Only when using the DBA role
D. Only when the tablespace is online
Answer: B
37) SYSTEM TABLESPACE can be made off-line.
a) Yes
b) No
Answer: b
38) Datadictionary can span across multiple Tablespaces.
a) TRUE
b) FALSE
Answer: b
39) Multiple Tablespaces can share a single datafile.
a) TRUE
b) FALSE
Answer: b
40) All datafiles related to a Tablespace are removed when the Tablespace is dropped?
a) TRUE
b) FALSE
Answer: b
41) In which situation would you need to create a new control file for an existing database?
A. When all redo-log files are lost.
B. When MAXLOGMEMBERS needs to be changed.
C. When RECOVERY_PARALLELISM needs to be changed.
D. When the name of the parameter file needs to be changed
Answer: B
42) When configuring a database for ARCHIVELOG mode, you use an initialisation parameter to specify which action?
A. The size of archived log files.
B. How frequently log files will be archived.
C. That the database is in ARCHIVELOG mode.
d. To Store Archive log Files
Answer: d
43) Which command creates a text backup of the control file?
A. ALTER DATABASE BACKUP CONTROLFILE TO TRACE;
B. ALTER DATABASE BACKUP CONTROLFILE TO BACKUP;
C. ALTER DATABASE BACKUP CONTROLFILE TO filename;
D. ALTER DATABASE BACKUP CONTROLFILE TO TEXT filename;
Answer: A
44) You are configuring a database for ARCHIVELOG mode. Which initialization parameter should you use?
A. LOG_ARCHIVE_SIZE
B. ARCHIVELOG_MODE
C. LOG_ARCHIVE_DEST
Answer: C
45) How does a DBA specify multiple control files?
A. With the ADD CONTROLFILE command.
B. By using the files in the STARTUP command.
C. With the MULTIPLEX control file command.
D. By listing the files in the CONTROL_FILES parameter.
Answer: D
46) Which dynamic view should a DBA query to obtain information about the different sections of the control file?
A. V$CONTROLFILE
B. DBA_CONTROLFILE
C. V$CONTROLFILE_RECORD_SECTION
D. DBA_CONRTOLFILE_RECORD_SECTION
Answer: C
47) Which statements about online redo log members in a group are true?
A. All files in all groups are the same size.
B. All members in a group are the same size.
C. The rollback segment size determines the member size.
D. Differently size of transactions requires that the DBA should differently sized members.
Answer: B