Which of the following statements is a characteristic of a tightly coupled system?
a) Components are connected indirectly through communication links.
b) Swapping components in to and out of the system is easier than on a loosely coupled system.
c) Contention can build up quickly at shared resources.
d) Communication is generally accomplished through message passing or shared virtual memory, but not shared physical memory.
c) Contention can build up quickly at shared resources.
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Concrete classes that inherit virtual functions but do not override their implementations:
a. Have vtables which are the same as those of their base classes. b. Receive their own copies of the virtual functions. c. Receive pointers to their base classes’ virtual functions. d. Receive pointers to pure virtual functions.
A set of statements must be executed an unknown number of times, and possibly not executed at all. Which loop statement should not be used to control the execution of this set of statements?
a) while b) for c) do d) repeat e) Any of these loop statements can be used.
What does the first pass of selection sort do?
a. Splits the array into two approximately equal pieces. b. Orders the first two elements of the array. c. Partitions the array into two unequal pieces depending on whether each element in the array is greater or less that some pivot element. d. Locates the smallest element in the array and swaps it into the zeroth position.
Statistical time-division multiplexing
a. is transparent to the end user b. allocates fixed bandwidth to each user c. varies the bandwidth allocation based on the user’s demands and needs d. is guaranteed to provide the bandwidth a user needs