A list of items the project needs in order to meet the criteria that has been defined are called ____________________.

Which statement best describes a binary with eight-zero substitution (B8ZS) signal?

a. The information is transmitted in three different voltage levels. b. A logic one is transmitted as positive voltage if the previous logic one was negative. c. The level always returns to zero for 50 percent of the bit cycle after every transition. d. Bipolar violations are intentionally inserted into a data signal to break up long strings of zeros.

Your application is using an ELB in front of an Auto Scaling group of web/application servers deployed across two AZs and a Multi-AZ RDS Instance for data persistence. The database CPU is often above 80% usage and 90% of I/O operations on the database are reads. To improve performance you recently added a single-node Memcached ElastiCache Cluster to cache frequent DB query results. In the next weeks the overall workload is expected to grow by 30%. Do you need to change anything in the architecture to maintain the high availability or the application with the anticipated additional load? Why?

A. Yes, you should deploy two Memcached ElastiCache Clusters in different AZs because the RDS instance will not be able to handle the load if the cache node fails. B. No, if the cache node fails you can always get the same data from the DB withouthaving any availability impact. C. No, if the cache node fails the automated ElastiCache node recovery feature will prevent any availability impact. D. Yes, you should deploy the Memcached ElastiCache Cluster with two nodes in the same AZ as the RDS DB master instance to handle the load if one cache node fails.