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PROGRAM
BSc IT
SEMESTER
FIFTH
SUBJECT CODE & NAME
BT9001, Data Mining
1
Describe the Three–Tier Data Warehouse Architecture.
Answer: Data warehouses often adopt a three – tier architecture, as presented in
Fig
1) The bottom tier is a warehouse database server that is almost
always a relational database system. “How are the data extracted from this tier
in order to create the data warehouse?” Data from operational databases and
external sources (such as customer profile information provided by external
consultants) are extracted using application program interfaces known
2
How data mining is used in telecommunication field? Explain.
Answer: The
telecommunications industry was an early adopter of data mining technology and
therefore many data mining applications exist.
Telco’s generate a tremendous amount of data, such as call detail data,
which describes the calls across the telecommunication networks, network data,
which describes the state of the hardware and software components in the
network, and customer data, which describes the telecommunication
3 Define noisy data. Briefly explain the data smoothening techniques.
Answer: “What is noise?”
Noise is random error or variance in measured variable. Given a numeric
attribute such as, price, how can we “smooth” out the data to remove the noise?
Let’
4
Briefly explain mining quantitative association rules.
Answer: Association Rule Mining: A Road Map
Market basket analysis
is just one form of association rule mining. In fact, there are many kinds of
association rules. Association rules can be classified in various ways, based
on the following criteria:
Based
on the types of values handled in the rule: If a rule concerns
associations between the presence or absence of items, it is a Boolean
association rule.
If a rule
5
Briefly explain Agent Based and Database Approaches to web mining.
Answer: The
agent-based approach to web mining involves the development of sophisticated AI
(Artificial Intelligence) systems that can act autonomously or
semi-autonomously on behalf of a particular user to discover and organize
Web-based information. Generally, the agent-based Web mining systems can be
placed into the following
6
Define text mining. State the text retrieval methods
Answer: Text
mining, also referred to as text data mining, roughly equivalent to text
analytics, refers to the process of deriving high-quality information from
text. High-quality information is
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