Schaum’s Outline Series OF Principles of Computer Science phần 6 pptx
Schaum’s Outline Series OF Principles of Computer Science phần 6 pptx
...
earlier).
1 06 OPERATING SYSTEMS [CHAP. 6
6.11 If a memory access requires 100 nanoseconds, and the computer uses a page table and virtual memory,
how long does it take to read a word of program memory?
6. 12 ... a logical page number.
Since the number of frames of physical memory is likely to be much smaller than the number of pages of
logical memory in a 64 -bit computer...
Schaum’s Outline Series OF Principles of Computer Science phần 1 doc
... most modern computers.
4 INTRODUCTION TO COMPUTER SCIENCE [CHAP. 1
SCHAUM’S
OUTLINE OF
Principles of
COMPUTER
SCIENCE
CARL REYNOLDS
Department of Computer Science
Rochester Institute of Technology
PAUL ... Jones
(http://www.cs.uiowa.edu/~jones/cards/history.html).
SCHAUM’S
OUTLINE OF
Principles of
COMPUTER
SCIENCE
CHAPTER 1
Introduction to
Computer S...
Schaum’s Outline Series OF Principles of Computer Science phần 2 doc
... but in computer science, because of the ubiquity of binary math, this is usually written as lg n, meaning
logarithm to the base 2 of n.
The total running time T of the merge sort consists of the ... the order of (10
6
)
2
, or a million million cycles, while
the merge sort will require on the order of 10
6
(lg 10
6
), or 10
6
(20), or 20 million cycles. Even when it r...
Schaum’s Outline Series OF Principles of Computer Science phần 3 ppt
... is a pattern
of ones and zeros stored in a word of computer memory. By the way, a “word” of memory is the basic unit of
storage for a computer. A 16- bit computer has a word size of 16 bits, or ... 32-bit computer has
a word size of 32 bits, or four bytes. A 64 -bit computer has a word size of 64 bits, or eight bytes. When a computer
accesses memory, it usually st...
Schaum’s Outline Series OF Principles of Computer Science phần 4 ppsx
... as part of
the state of each individual car (part of the state of each instance). On the other hand, we would maintain a
count of the total number of Automobiles as part of the state of the class ... which means that the first element of the array is referred to with a subscript of 0.
x[4] = 66 ; // assign the value 66 to the 5th element
c = y[1];// read the value of t...
Schaum’s Outline Series OF Principles of Computer Science phần 5 ppt
... a great deal of computer science
research during the 1 960 s, 1970s, and 1980s. Several solutions have been developed.
Dekker offered the first software solution to the problem in 1 965 , and a simplification ... operating system of a computer is a program, often called the “kernel,” which is always running on the
computer, and which governs the execution of all the other program...
Schaum’s Outline Series OF Principles of Computer Science phần 7 pps
... relation consists of rows, each of which represents an
instance of the entity type, and of columns, each of which represents one of the attributes of the entity type.
Each row of a relation is ... row more often than tuple, but a tuple is
a row of a table, an instance of a relation, an instance of an entity type. Each tuple consists of the values of the
attributes fo...
Schaum’s Outline Series OF Principles of Computer Science phần 8 ppt
... subquery returns any rows
ALL True if all of a set of comparisons are true
ANY True if any one of a set of comparisons is true
SOME True if some of a set of comparisons is ture
Table 8-1
Line Item
Consignment_Seller
Write ... Georgia.
Writers of software can protect their work by keeping the code secret. In the early days of computing,
customers often received source code to...
Schaum’s Outline Series OF Principles of Computer Science phần 9 pdf
... theirs,
and to their peace of mind, regardless of the quality of their locks.
Software professionals should never condone the spreading of viruses, Trojan horses, or worms. The ACM
Code of Ethics provides ... pertaining to professional work.
3.3 Acknowledge and support proper and authorized uses of computing resources.
CAN COMPUTERS KILL?
In particular, can software kill? Can soft...
Schaum’s Outline Series OF Principles of Computer Science phần 10 potx
... 95
assembler, 45
assembly language, 36, 45
Atanasoff, John, 8, 11–12
Atanasoff-Berry Computer (ABC),
8–9
Babbage, Charles, 6 7
Backus-Naur form (BNF), 61
BASIC, 46
binary, 32
binary search, 22–23
block ... inheritance
clients, 98, 132–133
Cobol, 46
compiler, 10, 47-8
computer science, definition, 1
computer virus, 175–1 76
computer word
data representation in, 33– 36
size, 32–...
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