A(n) ________ is created when two wireless devices connect to each other directly
a.ad hoc network
b.infrastructure wireless network
c.personal area network (PAN)
d.virtual private network (VPN)
A
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Provide an implementation of pthread_barrier_init and pthread_barrier_destroy to go along with the implementation of pthread_barrier_wait from Exercise 11.5. Don’t bother supporting any barrier attributes for now.
What will be an ideal response?
FrontPage Express mostly resembles which other Microsoft product:
(a) Microsoft Visual Studio. (b) Microsoft Excel. (c) Microsoft Outlook Express. (d) Microsoft Word.
In a recent report, CNNMoney stated forensic PC analysts and computer security specialists have a median annual salary of ________
A) $110,000 B) $125,000 C) $90,000 D) $140,000
A table has 100,000 rows and each row occupies 200 bytes. The table is stored on a disk which has 4k bytes per page. Compute the maximum (worst case) cost (number of I/O operations) of doing an equality search on the primary key assuming the following access paths. Make your reasoning clear - a number without an explanation gets no credit.
(a) The data file is unsorted and has no index. (b) The data file is sorted on the primary key and has no index. (c) There is an unclustered static hash index whose search key is the primary key. Assume all buckets are stored on disk and that each bucket has one overflow page. (d) There is an unclustered B+ tree index whose search key is the primary key. Assume that each entry in the tree occupies 20 bytes and the entire tree resides on the disk.