Which of the following is the formula you would use to arrive at the number of hosts on a subnet.
A. 2(number of ones in the subnet mask)-2
B. 2(number of zeroes in the subnet mask)-2
C. 2(number of zeroes in the subnet mask)
D. 2(number of ones in the subnet mask)-1
Answer: B
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Suppose the file is not ordered by the key field Ssn and we want to construct a B + - tree access structure (index) on SSN. Calculate (i) the orders p and p leaf of the B + -tree; (ii) the number of leaf-level blocks needed if blocks are approximately 69% full (rounded up for convenience); (iii) the number of levels needed if internal nodes are also 69% full (rounded up for convenience); (iv) the total number of blocks required by the B + -tree; and (v) the number of block accesses needed to search for and retrieve a record from the file--given its SSN value-- using the B + -tree.
Consider a disk with block size B=512 bytes. A block pointer is P=6 bytes long, and a record pointer is P R =7 bytes long. A file has r=30,000 EMPLOYEE records of fixed-length. Each record has the following fields: NAME (30 bytes), SSN (9 bytes), DEPARTMENTCODE (9 bytes), ADDRESS (40 bytes), PHONE (9 bytes), BIRTHDATE (8 bytes), SEX (1 byte), JOBCODE (4 bytes), SALARY (4 bytes, real number). An additional byte is used as a deletion marker.
Which of the following is NOT true in relation to digital rights management (DRM)?
A) It imposes restrictions on the use of files. B) It can be found on files such as music, eBooks, and videos. C) It is a technology applied to digital media files. D) It can legally be removed from a file.
IP is an acronym for ____________________.
Fill in the blank(s) with the appropriate word(s).
Copying or cutting a selection to the Windows ____________________ stores the selection in memory so you can paste it into the current file or another file.
Fill in the blank(s) with the appropriate word(s).