oracle rac interview questions and answers pdf

Oracle rac interview questions and answers pdf

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Oracle RAC Interview Questions and Answers

Oracle 11g RAC Interview Questions & Answers

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By Priya Pedamkar. When you talk about computing related to database, Oracle RAC Real Application Clusters provides and support software related to high availability and clustering within the Oracle environments. By using Oracle RAC, a number of computers can access Relational Database Management System of Oracle at the same time even when they are using only a single database, thereby supporting clustering. The interconnect is used to connect multiple instances among themselves and they all work in perfect synchronization while trying to access the data.

Oracle RAC Interview Questions and Answers

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There are a lot of opportunities from many reputed companies in the world. According to research, Oracle RAC has a market share of about 1. This course will help you to achieve excellence in this domain. In a RAC environment, it is the combining of data blocks, which are shipped across the interconnect from remote database caches SGA to the local node, in order to fulfill the requirements for a transaction DML, Query of Data Dictionary. When database nodes in a cluster are unable to communicate with each other, they may continue to process and modify the data blocks independently. This state is called split-brain. When an instance crashes in a single node database on startup a crash recovery takes place.

Ans: Oracle RAC consists of a database that is represented in a clustered manner in the architecture. The cluster is the collection or pool of independent servers that make up one single system. Cluster architecture provides more flexibility to manage and follow a modular incremental approach to improve fault errors and provide an incremental system. This architecture provides maximum security in terms of ensuring the high availability of the resources to the users. It provides the resources on-demand and provides hardware architecture such as failure at a single point is being removed. The architecture provides the decoupling of the Oracle instance like the process and memory that are running on the server from the Oracle database. It allows the running of any packaged or custom-built application with Oracle DB that is running on a server pool.

Oracle 11g RAC Interview Questions & Answers

Because every node ping voting disk as they are alive in cluster and connected with each other via private network interconnect. When this interconnect is not working properly then at that time nodes are try to ping voting disk whether they are alive. Which nodes ping most voting disk it is the part of cluster and rest is evicted from cluster, and cluster is saved from multiple brain syndrome. If voting disk are in even count then both nodes are survival node and it is craeted multiple brain in same cluster. If the voting disks are in odd number then in that case only one node ping greater count of voting disk and we save our cluster from "Multiple Brain Syndrome". Thanks for sharing this interesting and useful blog..

A cluster is referred to a group of independent, but connected servers that behaves as a single system. RAC or Real Application Cluster is a component of the database product that enables the database to be installed across multiple servers. Oracle RAC uses Oracle Clusterware for the infrastructure to bind multiple servers, so they operate as a single system. Cache function is used to show the storage of the information in the clustered network with the Oracle database. It involves two nodes, one writes the data to the same disk, and other reads the data block from the disk.

What is RAC? RAC stands for Real Application cluster. It is a clustering solution from Oracle Corporation that ensures high availability of databases by providing instance failover, media failover features. RAC stands for Real Application Cluster, you have n number of instances running in their own separate nodes and based on the shared storage. Cluster is the key component and is a collection of servers operations as one unit. RAC is the best solution for high performance and high availably. Non RAC databases has single point of failure in case of hardware failure or server crash.

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Is that it? Thanks for sharing, keep sharing. Your question and answer on the Oracle RAC will be useful for candidates attending Database interviews.

In a RAC environment, it is the combining of data blocks, which are shipped across the interconnect from remote database caches SGA to the local node, in order to fulfill the reuirements for a transaction DML, uery of Data Dictionary. When database nodes in a cluster are unable to communicate with each other, they may continue to process and modify the data blocks independently. This state is called split brain. When an instance crashes in a single node database on startup a crash recovery takes place. In a RAC enviornment the same recovery for an instance is performed by the surviving nodes called Instance recovery.

Oracle DBA RAC Interview Questions and Answers - 1

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