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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 semiautonomously 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. Highquality information is
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