________ is important for preventing indefinite postponement in the readers/writers problem.
a) Giving preference to waiting readers over waiting writers
b) Ensuring that no writer thread is waiting to write when a new reader begins reading
c) Forcing that arriving readers to wait while waiting readers are cascading
d) all of the above
d) all of the above
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Match each item with a statement below.
A. An authoritative name server that stores the primary copies of zone records. B. Enables you to create an alias for a host. C. A resource record containing basic information about a zone. D. Servers that enable you to forward unresolved queries to an offsite DNS server and then cache the results on your local DNS server. E. Identifies mail servers (mail exchangers) for a zone. F. Maintains a copy of the master zone file that's used as a backup. G. Used to resolve a hostname to an IPv4 address for locating a resource. H. Control the Internet's top-level domains (TLDs). I. Used to resolve an IPv4 address to its hostname.
You work as IT technician for NetTech Inc. A customer complains that his laptop overheats. What will you suggest him to avoid overheating of the laptop?
A) Shut down the laptop every hour. B) Block the laptop ventilators. C) Do not operate the laptop on a soft surface. D) Replace the cooling fan regularly.