Oracle RAC Interview Question and Answers 10G and 11G/ 12c
1. What is the major difference between 10g and 11g RAC? Well, there is not much difference between 10g and 11gR (1) RAC. But there is a significant difference in 11gR2. Prior to 11gR1(10g) RAC, the following were managed by Oracle CRS Databases Instances Applications Node Monitoring Event Services High Availability From 11gR2(onwards) its completed HA stack managing and providing the following resources as like the other cluster software like VCS etc. Databases Instances Applications Cluster Management Node Management Event Services High Availability Network Management (provides DNS/GNS/MDNSD services on behalf of other traditional services) and SCAN – Single Access Client Naming method, HAIP Storage Management (with help of ASM and other new ACFS filesystem) Time synchronization (rather depending upon traditional NTP) Removed OS dependent hang checker etc, manages with own additional monitor process 2. What are Oracle