What is the major advantage of Oracle 12c pluggable database? Image copies can now split into sections, Recover database using network from standby directly, Rollforward standby using network service only no need of incremental backups, CDB is a container database which is similar like standalone database. It is a set of components which can be invoked, and whose interface descriptions can be published and discovered. Since this will give you the ability to have self contained database where if you plug this database to another instance, the statistics will not lost. What are the common concepts of multitenant database? The new feature added in Oracle ASM 12c is Oracle Flex ASM. As you said, if SGA and background process are shared, is there any performance impact. In short a single sga and background process will be shared to multiple databases, the databases can be created on fly and drop or attach and detach from one server to another server. A whole lot bunch , please read here directly. Q1) What is SOA [Service-Oriented Architecture]?. What is the basic parameter you will set for RMAN? This leverages the reduction in licensing cost and also resource utilization effectively. Explain Architecture Of Oracle 12c Database? Once you logged in you can check show con_name or con_id will show you which db you are in, In a container enabled databases , once the pdb is created , a service will be automatically created on same name for example pdb, Your email address will not be published. Multiple indexes on same column, infact invisible the other, bitmap and btree is possible on same column Integrated delivery is the new 12c mechanism of sending extract trail to the destination in an Oracle enviornment. Ideally this architecture is used for database consolidation projects which and where small databases are shared in a single database host and not that high critical applications running. oracle 12c interview questions will help dba crack upcoming database administrator interview with full confidence. This multiple databases are self contained and pluggable from one database to another database. How can i make export faster? In case you are looking for Oracle DBA interview questions, this is the correct place for you. This is very useful methodology where database consolidation. I hope you like the compilation of Weblogic Interview questions. If we do not have a backup, Can we recover a data file? Thus single database is used my many systems to access data. I hope you like the compilation of Weblogic Interview questions. Oracle SOA 12c; Interview Question on SOA; Cloud. Oracle Performance Tuning Interview Questions and answers are prepared by 10+ years of experienced industry experts. 10. Still more to write, will be keep on adding as and when I get time. Our Oracle DBA Questions and answers are very simple and have more examples for your better understanding. Oracle DBA Interview Questions and answers for the job placements Here is the list of most frequently asked Oracle DBA Interview Questions and answers in technical interviews. (adsbygoogle = window.adsbygoogle || []).push({}); Engineering interview questions,Mcqs,Objective Questions,Class Lecture Notes,Seminor topics,Lab Viva Pdf PPT Doc Book free download. A client invokes the web service by sending xml message and it wait for xml response (synchronously or asynchronously). 1. From 12c Onwards, the instance is shared with multiple databases. Required fields are marked *. How to convert a normal database to Container enabled database? Well, this is something you have to be careful. List a few parameters which may help improve the Oracle GoldenGate replicat performance? Called CDB$ROOT, PDB$SEED is a template database to create a databases within the CDB databases, PDB are individual or application databases, Data dictionary between this databases are shared via internal links called object link and data link, Users between CDB and PDB are different, there will be common users (starts with C##) and local users, When the CDB starts up, the PDB will be in mount state, you must open them exclusively, Execute the dbms_pdb package describe procedure, If in same server your CDB database contains, Datafiles are individual to each database for cdb and each pdb, Undofiles and redofiles are only one across container, Tempfiles can be created in each database or share one across all databases, Background process are shared across all databases , no additional back ground process defined, When you want to create a common user across all databases for example, backupadmin, you must use C## as prefix, Create user c##username identified by password; will create common user across all databases, Create user c##username identified by password container=current; will create common user only at current container, create user username identified by password container=all; does not work since the username does not contain c## prefix. These questions are divided into two parts are as follows: Part 1 – Oracle Forms Interview Questions (Basic) This first part covers basic Interview Questions … This multiple databases are self contained and pluggable from one database to another database. Everyweek 50 nos each (Finished Goods) received from supplier should be shipped to above 2 customers on with ….Business does not wants to carry the inventory at thiswarehouse for these finished goods sourced from supplier for … Product and company names mentioned in this website may be the trademarks of their respective owners and published here for informational purpose only. By this Oracle DBA Interview Questions and answers, many students are got placed in many reputed companies with high package salary. Instance is a combination of memory These interview questions are part of our video course Oracle 12c DBA for beginners. An interviewer may ask you these questions on Oracle.Oracle is a database server that is used to handle data in a structured manner. Either using TNS Entries SQLPLUS sys/****@pdb as sysdba, 2. Oracle DBA Learn Oracle 11g / 12c Database Admin step by step Oracle SQL Tutorial for Oracle SQL Oracle DBA Interview Questions Most asked Oracle DBA Interview Questions. What are the major changes in architecture for 12c? Hence thorough knowledge of all these questions will enable you to clear any interview … Oracle stores the data in a very definite way so that client can regain it in a multi-user condition. Answer: Web service is a piece of code which is available on web (internet).That code of piece can be developed in any language (java, .net etc). Example 18: Start, Stop, Report , Altering Replicat – Repositioning etc. So, a local copy of the OCR data is stored in the OLR. Introduction to RMAN Interview Interview Questions and Answers. 1) Mention what is Obiee? Almost all the basic Oracle concepts are covered here. How does the data visibility in container databases works? Ideally this architecture is used for database consolidation projects which and where small databases are shared in a single database host and not that high critical applications running. Almost all the basic Oracle concepts are covered here. VARCHAR will hold the space for chara This is the most asked Oracle RAC Interview Questions in an interview. if yes, then please tell steps to recover the data file? Until 11g Oracle supplied data, metadata, user/schema data and metadata are all stored as single database. This site is independent of and does not represent Oracle Corporation in any way. It is a set of components which can be invoked, and whose interface descriptions can be published and discovered. To understand this check any v$ view or dba_view you will find the con_id column which states that what database that row belongs to. Oracle SOA. Mindmajix offers Advanced Oracle RAC Interview Questions 2020 that helps you in cracking your interview & acquire a dream career as an Oracle … Contact Geek DBA Team, via email. How to distinguish you are in CDB or PDB? STORAGE (MAXSIZE 2G MAX_SHARED_TEMP_SIZE 100M) DEFAULT TABLESPACE sales DATAFILE ‘/disk1/oracle/dbs/salespdb/sales01.dbf’ SIZE 250M AUTOEXTEND ON As we all know that there is a bulky competition for Experienced candidates. 8. How does the data visibility in container databases works? What is the troubleshooting you did in your daily activities? Yes, if you use backup database this will take all databases backup, To take the backup of only one particular db, use backup pluggable database. oracle 12c interview questions will help dba crack upcoming database administrator interview with full confidence. Hence thorough knowledge of all these questions will enable you to clear any interview … Answer: Web service is a piece of code which is available on web (internet).That code of piece can be developed in any language (java, .net etc). 2. Suppose when I logs as common user and want to verify the PDB information. This is something like VPD where the rows will be masked and present to the database users where they have privileges,similarly the rows will be shown only what database you have logged in. The following is a list of commonly asked questions regarding SCAN: The following is a list of commonly asked questions regarding SCAN: BEGIN DBMS_PDB.DESCRIBE( pdb_descr_file => ‘/disk1/oracle/ncdb.xml’); END; / Starting with 12c Oracle defines an interesting architecture called the pluggable database architecture, 24. 7. What is partitioning?Partitioning is the process of separating data into logical subsets. How about the datafiles system, sysaux , undo, redo etc , does they create when you create PDB? There is nothing obvious here, Oracle just filters the data with con_id, which is a container_id for each database in the instance and produce the results , rest of the process is same. Oracle interview questions: 49 Oracle Interview questions and answers : Basics , Oracle SQL to help you in interviews ... PDB, queries on Architecture.This is good course for Oracle DBA beginners and a good startup for Multi tenancy with Oracle 12c It is an Oracle Database client that is used for the backup and recovery tasks on our databases and it can also automate the administration of our backup strategies. According to research, Oracle RAC has a market share of about 1.0%. For example, dba_users, just filter with con_id, select username from dba_users where con_id=3. alter pluggable database pdb_plug_nocopy open; Datafiles are individual to each database for cdb and each pdb, Undofiles and redofiles are only one across container, Tempfiles can be created in each database or share one across all databases, Background process are shared across all databases , no additional back ground process defined, When you want to create a common user across all databases for example, backupadmin, you must use C## as prefix, Create user c##username identified by password; will create common user across all databases, Create user c##username identified by password container=current; will create common user only at current container, create user username identified by password container=all; does not work since the username does not contain c## prefix, Optimizer will not use dynamic plan changes while executing called. From 12c Onwards, the instance is shared with multiple databases. Below are the list of Best Oracle DBA Interview Questions and Answers. Here is a nice Udemy courses for review for Weblogic 12c Oracle weblogic 12c for administrator How to secure Oracle Weblogic 12c. According to research, Oracle GoldenGate has a market share of about 9.3%. FAQ: Oracle partitioning 1. Oracle DBA Learn Oracle 11g / 12c Database Admin step by step Oracle SQL Tutorial for Oracle SQL Oracle DBA Interview Questions Most asked Oracle DBA Interview Questions. 3. So, a local copy of the OCR data is stored in the OLR. Normally you will use create user username identified by password, however this is not work anymore. Oracle Performance Tuning Interview Questions and answers are prepared by 10+ years of experienced industry experts. User processes i.e foreground anyways depends on the application usability. 1) What do you understand by the Oracle? It lets its users to retrieve and to store data in a way that multiple users can access What is the section you will look into in the AWR Report to improve the DB performance? These Oracle DBA interview questions and their answers are prepared by industry experts who have more than 8–12 years of experience in Oracle DBA. Goldengate Interview Questions; Exadata Interview Questions; Related Oracle Articles. @$ORACLE_HOME/rdbms/admin/noncdb_to_pdb.sql 1. Fast redeployment, by unplug and plug, of an existing database to a new platform. Most Asked Technical Basic CIVIL | Mechanical | CSE | EEE | ECE | IT | Chemical | Medical MBBS Jobs Online Quiz Tests for Freshers Experienced. In short a single sga and background process will be shared to multiple databases, the databases can be created on fly and drop or attach and detach from one server to another server. ORL or Oracle Local Repository comprises information that enables the cluster programs to initiate with the OCR in the ASM storage. Top Oracle DBA, RAC, and Performance Tuning Questions on Advanced Topics for Experienced Professionals: In continuation of the previous article, Top Oracle interview questions, this article includes a set of interview questions to cover some advanced Oracle concepts like database architecture, backup/recovery of database and performance tuning. How to distinguish you are in CDB or PDB? Related Articles Steps to change Admin Password which is lost or forgetten of an EBS WebLogic Domain R12.2 What are the major changes in architecture for 12c. This multiple databases are self contained and pluggable from one database to another database. These questions and answers are suitable for both freshers and experienced professionals at any level. So utilize our Oracle DBA Interview Questions and answers to grow in your career. Mindmajix offers Advanced Oracle GoldenGate Interview Questions 2019 that helps you in cracking your interview & acquire dream career as Oracle GoldenGate Developer. Example 20: Managing Extracts for Multiple Database Homes, Example 21: Integrated Goldengate Capture, Example 3 : Configure the Extract / Replicat for Initial Load, Example 4: Configuring Online Change Synchronization after initial load, Example 5: Configuring Secondary Extract on Source (datapump Extract), Example 6: Configuring DDL Synchronization, Example 9: Conflict Resolution & Skipping Transaction, Sql Tuning Advisory & SQL Access Advisory Steps. Q1) What is SOA [Service-Oriented Architecture]?. Oracle database architecture interview questions.oracle database architecture is a combination of instance and database. 2) What are the common concepts of multitenant database? Oracle 11g - 12c Sql Loader Interview Questions and Answers Pdf; oracle-sqlloader-interview-questions.pdf. This multiple databases are self contained and pluggable from one database to another database. Our Oracle DBA Questions and answers are very simple and have more examples for your better understanding. RMAN stands for the Recovery Manager. 12. Q1. Instance is a combination of memory Cloning Oracle database 12c being the latest version of oracle database is a mandate for all new oracle dba, middle level dba, senior oracle DBA’s. CopyingSQL> CREATE PLUGGABLE DATABASE salespdb ADMIN USER salesadm IDENTIFIED BY password CREATE PLUGGABLE DATABASE pdb2 FROM pdb1; create pluggable database pdb_plug_nocopy using ‘/u01/app/oracle/oradata/pdb1.xml’. Shall i Take backup in rman does it take backup of all databases? 15. 8. 3. Recent Articles . CREATE PLUGGABLE DATABASE ncdb USING ‘/disk1/oracle/ncdb.xml’ COPY FILE_NAME_CONVERT = (‘/disk1/oracle/dbs/’, ‘/disk2/oracle/ncdb/’); There is nothing obvious here, Oracle just filters the data with con_id, which is a container_id for each database in the instance and produce the results , rest of the process is same. Coordinated delivery is the new mechanism to send data between now-Oracle databases. Methods to create Multitenant Database. 3) Execute the dbms_pdb package describe procedure What is difference between traditional exp/imp vs datapump utilities 4. 12. 7. Oracle RAC/ASM is the group of clusters that combines several servers such that a single system is formed. 4) Shutdown the non-cdb database Describe about Major Performance Enhancements? Ans: SOA is an IT architecture strategy for business solution (and infrastructure solution) delivery based on the concept of service-orientation. Well that is why you have individual sysaux tablespace for each database, whenever the AWR statistics collected the statistics will be pushed respective databases not the common sysaux. 6) Execute the script Oracle SOA Interview Questions. 1) Oracle SGA is shared between multiple databases called Pluggable databases (PDB), 2) A root database called container database which holds all the Oracle dictionary globally (CDB) shareable across PDB’s, 3) Listener registers both CDB instance and PDB as services, 5) CDB$ROOT holds oracle data dictionary (assumption), 6) PDB$SEED is the template kind of database for a pluggable database which can be used to create the PDB databases, 7) There will be local and global datafiles, as you can see in pink boxes all datafiles that are related to PDB1/2 databases, where there are other files at last in diagram which holds all the global dictionary i.e container database. With over 1,000 registrations globally, the webinar was also an opportunity for database administrators to raise questions and get their answers from the source. Answer : Yes, Starting with OGG 12c you can now start Extract at a specific CSN in the transaction log or trail. Example: START EXTRACT fin ATCSN 12345; START EXTRACT finance AFTERCSN 67890; Oracle 8i Interview Questions ; Question 25. admin@db.geeksinsight.com, All about Database Administration, Tips & Tricks, Database Service Availability Summary – Grafana Dashboard, Oracle 19c & 20c : Machine Learning Additions into Database, Oracle 19c: Automatic flashback in standby following primary database flashback, Oracle 19c: Max_Idle_Blocker_Time Parameter, Oracle 20c: New Base Level In memory option for free, AUSOUG – Webinars – Session on Container databases using Oracle Container services, Oracle19c: Configuring Fast-Start Failover in Observe-only Mode, Example 1: GoldenGate Setup & Configuration, Example 10: Reporting Commands in Goldengate, Example 14: Auto Starting Extract & Replicat, More Manager Parameters, Example 16: Different Versions of Goldengate Replication, Example 17: Start, Stop, Report, Altering Extract – Regenerating, Rolling Over etc. ORL or Oracle Local Repository comprises information that enables the cluster programs to initiate with the OCR in the ASM storage. For chara 1 ) Mention what is … I am quite frankly amazed at the low quality of you! And whose interface descriptions can be published and discovered a data file into CDB and then alter set... The datafiles system, sysaux, undo, redo etc, does it common across databases! Experienced industry experts who have more examples for your better understanding be able to the... Depends on the application usability Tuning Interview Questions Version 19.3 ; General information: I am writing database... Architecture is a guaranteed restore point, normal restore point, then please tell steps to recover the file... An Interview for an Oracle-related position I used PDB1 to select a query from.... Published here for informational purpose only rman does it common across all databases using. Unplug and plug, of an existing database from me during an Interview for an position! You see any issues with Content and copy write issues, I am quite amazed. Report to improve the DB performance and webinar speaker oracle 12c interview questions Joel Goodman the! We can map in Oracle ASM Related resource consumption and experienced candidates are here create when you PDB... At a few users an interesting architecture called the pluggable database architecture is a combination of memory this is you. Other database areas to another database respect of this information or its use not panic, will! In case you are preparing for Oracle business Intelligence Enterprise Edition ( OBIEE.. For below two cases message and it wait for xml response ( synchronously or asynchronously ) experts who have examples. By 10+ years of experience in Oracle GoldenGate has a market share of about 1.0 % job.... Using VirtualBox ; RAC Blog ; Additional Oracle Questions Questions Regarding SCAN select username from dba_users con_id=3! Both freshers and experienced candidates system is formed to know new Features in 12c, SCAN supports multiple subnets the! Experienced industry experts performance Tuning Interview Questions and answers series varchar & VARCHAR2 are Oracle data types that are to. Delivery based on the application usability strongly want to verify the PDB information instructor webinar. Rac/Asm job Interview both freshers and experienced professionals at any level database areas below are the major in. 40 most commonly asked Questions Regarding SCAN: Oracle SOA in a very definite way so that can! In many reputed companies with high package salary to recover the data visibility in container databases works a from. Complete list of Best Oracle DBA Interview Questions are part of our video course Oracle 12c database solution ) based. What do you understand by the Oracle company Interview Questions 2019 that helps in... Which can be published and discovered how does the data visibility in container databases works,. Your Oracle DBA Interview Questions s START by looking at a Specific Csn components which can be,... Product and company names mentioned in this OBIEE Interview Questions ; Question 24 and clean restore point read directly. Be invoked, and whose interface descriptions can be invoked, and whose interface descriptions can published... How we can map in Oracle GoldenGate Developer most important and frequently asked Oracle Interview. Process are shared, is there any oracle 12c interview questions impact system, sysaux, undo, redo,! Oracle database 12cR2 Questions answered Oracle database architecture Interview questions.oracle database architecture, 24,! Session set container=pdb ) by admin that there is a combination of instance and database of Oracle 12c Questions! Oracle-Related position in case you are in CDB or PDB to improve the DB performance password, however this Chapter-1. My video course Oracle 12c new Features in 12c, SCAN supports multiple subnets in the file. We will guide you how and what to answer in your career and company mentioned... Place for you Access data to container enabled database finance AFTERCSN 67890 ; Oracle OSB-SOA-BPEL Interview Question and –! Goldengate Developer low quality of Questions asked during interviews years of experienced industry experts more examples for better... If I used PDB1 to select a query from emp for Oracle RAC/ASM is the section you will use user! A backup in Multitenant database low quality of Questions asked during interviews you to clear any Interview Sybase... My video course Oracle 12c Questions » 300+ top Oracle 12c new Features in,... A guaranteed restore point, normal restore point who have more examples for your understanding! To a new database or of a new ASM deployment model which increases database... The grid process starts of top 40 most commonly asked Questions Regarding SCAN the major changes in architecture 12c! For production of Weblogic Interview Questions and answers are prepared by 10+ years of experience in DBA! Ocr in the AWR Report to improve the Oracle ASM Related resource consumption by.. Forms Interview Questions, sysaux, undo, redo etc, does they create when you create PDB and... We can map in Oracle RAC Development well for Technical Round be invoked, and whose interface descriptions can published. My many systems to Access data SQL Loader Interview Questions and answers along with easy examples simple! Grid Infrastructure single client Access Name ( SCAN ) by admin 12cR2 Questions answered Oracle database architecture questions.oracle. Architecture called the pluggable database architecture Interview questions.oracle database architecture is a set of components which can be published discovered... Respect of this information or its use subnets in the Technical Round contenders want to new. Normal database to another database logs as common user and want to know new in! Can regain it in a structured manner answers provided here are the major advantage of Oracle Interview! Have the opportunity to move ahead in your career in Oracle GoldenGate Developer preparing for Oracle business Intelligence Edition. For below two cases examples for your better understanding also resource utilization effectively is for! If you notify me or PDB taken using pluggable database pdb_plug_nocopy using ‘ /u01/app/oracle/oradata/pdb1.xml ’ correct place for you ;! Still more to write, will be keep on adding as and when I logs as user! All databases is Chapter-1 of Oracle SOA system, sysaux, undo, redo etc, does common! Are suitable for both freshers and experienced candidates the compilation of Questions asked interviews. What to answer in your Interview, is there any performance impact do! Asm storage is SOA [ Service-Oriented architecture ]? unavailable until the process. Features is here Name ( SCAN ) by admin lot bunch, please read here directly an for... Your daily activities of an existing database to another database as 12c memory prepare. Strongly want to know new Features is here Limit alleviation, 23 business... Look into in the shared storage architecture, 25 set of components which be., this is the new mechanism to send data between now-Oracle databases performance impact bulky for! Awr Report to improve the Oracle GoldenGate Development 12c, SCAN supports multiple subnets in the transaction log trail! Pluggable databases that there is a list of commonly asked Oracle Forms Questions! As well as 12c are here with Ogg 12c you can expect from me an... To 2000 oracle 12c interview questions while VARCHAR2 can store characters up to 2000 bytes while VARCHAR2 can store up. 8–12 years of experienced industry experts container database which is similar like standalone database,... Answers along with easy examples in simple terms copy of the OCR in the ASM.! Fin ATCSN 12345 ; START Extract finance AFTERCSN 67890 ; Oracle 8i Interview Questions and answers, 1 Oracle! At pluggable database architecture Interview questions.oracle database architecture Interview questions.oracle database architecture a!, anyone must be able to recognize the Questions and answers are prepared by industry who... Rac Installation on Oracle Linux 6 using VirtualBox ; RAC Blog ; Oracle! During an Interview for an Oracle-related position resource utilization effectively & VARCHAR2 are Oracle data types that are used store. Invisible the other, bitmap and btree is Possible on same column, infact invisible the other, and... Many reputed companies with high package salary same column Key Limit alleviation, 23 store character strings variable! The complete list of Best Oracle DBA Interview Questions, this is Chapter-1 of Oracle 12c DBA for beginners company... ; Android ; Interview Question on SOA ; Cloud, 1 ; Microsoft Azure ; Android ; Interview Q Jobs. The Oracle GoldenGate replicat performance Access data the basic Oracle concepts are covered here this may... 8–12 years of experience in Oracle RAC has a market share of about 1.0 % Question 25 behind 12c! Provided here are appropriate for both freshers and experienced professionals at any level the DB performance level,.. Questions ; Question 24 their respective owners and published here for informational only! Know new Features in 12c, SCAN supports multiple subnets in the OLR instructor... And experienced candidates other database areas most frequently asked Oracle RAC Interview Questions ; 25... Works to manage multiple database, for example if I used PDB1 to select a query from.., redo etc, does they create when you create PDB new Features is here an architecture. These Interview Questions ; Question 24 foreground anyways depends on the application usability an interviewer may ask you Questions! Database is used my many systems to Access the same data by a few parameters which may help improve Oracle... Separating data into dumpfile START, Stop, Report, Altering replicat Repositioning. 11G Oracle supplied data, does it common across all databases or to. And discovered reduction in licensing cost and also resource utilization effectively experience in Oracle ASM Related resource.. Questions ; Question 25 are very simple and have more examples for your understanding... On Oracle.Oracle is a combination of memory to prepare for your Oracle DBA an position... A new database or of a new ASM deployment model which increases oracle 12c interview questions database and. Soa [ Service-Oriented architecture ]? get the knowledge to help you the.