Foundations of Network Technologies
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30 minutes before class (in class room)
11/2 hours after class (in class room)
Do Problem 11.10
Selector channel two magnetic disk
And tape drive units = 2 x 2 x 200 Kbytes/s
= 800 Kbytes/s
Two line printers
= 2 x 6.6 Kbytes/s
= 13.2 Kbytes/s
Two card readers
= 2 x 1.2 Kbytes/s
= 2.4 Kbytes/s
Ten VDT terminals
= 10 x 1 Kbytes/s
What is a system bus and what is it composed of?
A system bus that connects the major
components of a
The steps that computer designers should take to
improve the security of USB technology.
Using the ubiquitous USB drive
Theoretical questions(ch4 ,ch7,ch8,ch9)
4.1. How do the relations (tables) in SQL differ from the relations defined
in Chapter 3? Discuss the other differences in terminology.Why does
SQL allow duplicate tuples in a table or in a query result?
How cache memory works
Why cache memory works
Cache design basics
Internal Vs. External Fragmentation
Internal Fragmentation occurs when a fixed size memory allocation technique is used. External
fragmentation occurs when a dynamic memory allocation technique is used.
Internal fragmentation occurs when a fixed size pa
Their given priorities are 6,3,7,9 and 4 to A,B,C,D and E respectively, Mentioned in Problem and
the linear, value corresponding to higher priority. Since the lowest value is 3 fro
Number of As resource available = 15 -(2+0+4+1+1+1)
Number of Bs resource available = 6 -(0+1+1+0+1+0)
Number of Cs resource available = 9 -(2+1+0+0+0+1)
Five categories of synchronization granularity.
In this case each process represents separate, and independent Application or Job
running. Its uses in time sharing system.
Very Coarse Parallelism:
There is synchronization among pr
The process scheduling is the activity of the process manager that handles the removal
of the running process from the CPU and the selection of another process on the basis of a
Process scheduling is an essential part of a
An existing commercial OS can be used for an embedded system by adding real time
capability, streamlining operation, and adding necessary functionality.
An advantage is that the embedded OS derived from a commercial general-purpose OS
is based o
Here is the solution:
Advantages of trees in the database technology:
Trees help in searching the database in an easier fashion.
Since the divide and conquer concept in followed in the tree it takes less time to search
Usually we follow the g
Concept of Data Cube
Users of decision support systems often see data in the form of
data cubes. Cube with some measure of interest is used to
represent data. A "cube" is called, it is two-dimensional, threedimensional, or maybe higher dimensional. Each d
Assignment#2 for Week#1
Descriptive statistics are used to describe the basic features of the data in
a study. They provide a simple summary of the sample and measures. Together
with simple graphics analysis, quantitative analysis of the dat
Data classification is the process of organizing data into
categories for its most effective and efficient use.
A well-planned data classification system makes essential
data easy to find and retrieve. This can be of particular importance
Outline the major research challenges of data mining in one
specific application domain, such as stream/sensor data
analysis, spatio-temporal data analysis, or bioinformatics.
Ans. Major data mining challenges for two ap
Assignment#2 for Week#2
1. Snowflake schema, fact constellation, starnet query model
The snowflake schema and fact constellation are both variants of the
star schema model, which consists of a fact table and a set of dimension
Partitioning enhances the performance, manageability, and
availability of a wide variety of applications and helps reduce the
total cost of ownership for storing large amounts of data.
Partitioning allows tables, indexes, and index-organiz
Discussion#1 for Week#2
Data quality is not linear and has many dimensions like Accuracy,
Completeness, Consistency, Timeliness and Auditability. Having data quality on
one dimension is as good as 'no quality'.
None of the data quality dimen
Frequent Itemset Mining
A collection of one or more items
Example: cfw_Milk, Bread, Diaper
k-itemset:itemset that contains kitems
Support count ()
Frequency of occurrence of an itemset
A common way of introducing data warehousing is to refer to the
characteristics of a data warehouse.
Data warehouses are designed to help you analyze data. For example,
to learn mo
What is Decision Tree Induction?
A decision tree is a structure that includes a root node, branches, and leaf
nodes. Each internal node in each branch reflects the results of a test, a test on an
attribute shows, and each leaf node holds a class label. Th
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