Objective measures of the user support or help desk operation are called ____.
A. performance statistics
B. abandonment rate
C. Erlang measures
D. adaptive tests
Answer: A
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Explain why this protocol prevents a global deadlock among transactions.
The kill-wait concurrency control of Exercise 20.32 is based on locking. When it is used in a distributed system, it is referred to as the wound-wait protocol. We assume that a distributed transaction uses RPC to communicate among cohorts so that when the two-phase commit protocol starts, all cohorts have completed. The kill primitive is replaced by a wound primitive. If the cohort of transaction, T1, at some site makes a request that conflicts with an operation of the cohort of an active transaction, T2, at that site, then if TS(T1) < TS(T2) then wound T2 else make T1 wait where wound T2 means that T2 is aborted (as in the kill-wait protocol), unless T2 has entered the two-phase commit protocol, in which case T1 waits until T2 completes the protocol. What will be an ideal response?
The cin object reads a set of characters up to either a blank space or a newline character.
Answer the following statement true (T) or false (F)
A number that represents a quantity or an amount.
What will be an ideal response?
RAID level 6 is basically the same as RAID level 5, but it adds a second set of parity bits for added fault tolerance ?and allows up to two simultaneous hard disk drive failures while remaining fault tolerant.
Answer the following statement true (T) or false (F)