Client/Server Computing:

Q66. The Scalable Reliable Multicasting (SRM) protocol developed by Floyd et al. (1997) uses feedback suppression to achieve scalable multicasting. a. true b. false Q67. The main advantage of independent checkpointing is that saved state is automatically globally consistent, so that cascaded rollbacks leading to the domino effect are avoided. a. true b. false Q68. If a client sends a request to a server to do some work and crashes before the server replies, then a server-side computation is active but no client-side process will be waiting for the result. Such an unwanted computation is called: a. a loose cannon b. an free thread c. a infinite recursion d. an orphan Q69. Safety refers to the characteristic that nothing catastrophic happens when the system temporarily fails to operate correctly. a. true b. false Q70. In backward recovery, the main issue is to bring the system from its present erroneous state back into a previously correct state. To do so, it will be necessary to record the system's state from time to time, and to restore such a recorded state when things go wrong. Each time (part of) the system's present state is recorded, a _____ is said to be made. a. checkpoint b. checksum c. milestone d. epoch