Quiz Start Time: 04:09 PM Time Left 49
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Question # 1 of 10 ( Start time: 04:09:48 PM ) Total Marks: 1
In nested-loop join case, if there are ‘M’ rows in outer table and ‘N’ rows in inner table, time complexity is
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O(MN) (Correct)
Quiz Start Time: 04:09 PM Time Left 35
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Question # 2 of 10 ( Start time: 04:11:20 PM ) Total Marks: 1
In context of data mining definition, the term “value” means:
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importance of hidden perameters discovered (Correct)
Quiz Start Time: 04:09 PM Time Left 56
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Question # 3 of 10 ( Start time: 04:12:51 PM ) Total Marks: 1
Classification consists of examining the properties of a newly presented observation and assigning it to a predefined ____________.
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Class (Correct)
Quiz Start Time: 04:09 PM Time Left 25
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Question # 4 of 10 ( Start time: 04:13:44 PM ) Total Marks: 1
The optimizer uses a hash join to join two tables if they are joined using an equijoin and
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Large amount of data need to be joined (Correct)
A large amount of data needs to be joined.
A large portion of the table needs to be joined.
Quiz Start Time: 04:09 PM Time Left 20
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Question # 5 of 10 ( Start time: 04:15:07 PM ) Total Marks: 1
In context of nested-loop join, actual number of matching rows returned as a result of the join would be ______ of the order of tables
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Independent (Correct)
Quiz Start Time: 04:09 PM Time Left 13
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Question # 6 of 10 ( Start time: 04:16:36 PM ) Total Marks: 1
Normally the input data structure (a database table) for a data mining algorithm:
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Quiz Start Time: 04:09 PM Time Left 12
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Question # 7 of 10 ( Start time: 04:18:07 PM ) Total Marks: 1
Mining multi dimensional databases allow users to:
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Analyze Data (Correct)
Quiz Start Time: 04:09 PM Time Left 24
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Question # 8 of 10 ( Start time: 04:19:38 PM ) Total Marks: 1
________ refers to the overall process of discovering useful knowledge from data and data mining refers to a particular step in this process.
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Knowledge discovery in database (Correct)
Quiz Start Time: 04:09 PM Time Left 17
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Question # 9 of 10 ( Start time: 04:21:01 PM ) Total Marks: 1
In case of nested-loop join, Inner table is accessed _____ for each qualifying row (or touple) in outer table
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One Time (Correct)
Quiz Start Time: 04:09 PM Time Left 10
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Question # 10 of 10 ( Start time: 04:22:32 PM ) Total Marks: 1
In contrast to data mining, statistics is ______ driven.
knowledge (Correct)
Quiz Start Time: 08:50 PM Time Left 55
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Question # 1 of 10 ( Start time: 08:50:34 PM ) Total Marks: 1
In context of data mining definition, the term “value” means:
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The primary key of table
The index location of the record
Importance of hidden patterns discovered (Answer)
Numerical or string measure assigned to an attribute
Quiz Start Time: 08:50 PM Time Left 22
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Question # 2 of 10 ( Start time: 08:51:23 PM ) Total Marks: 1
Data mining is all about:
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Knowledge discovery in database
Finding hidden patterns in data
Finding relationships in data
All of the given options ( may be Answer)
Quiz Start Time: 08:50 PM Time Left 19
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Question # 3 of 10 ( Start time: 08:52:41 PM ) Total Marks: 1
In contrast to statistics, data mining is ______ driven.
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Assumption (Answer)
Knowledge
Human
Database
Quiz Start Time: 08:50 PM Time Left 55
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Question # 4 of 10 ( Start time: 08:53:56 PM ) Total Marks: 1
Mining multi dimensional databases allow users to:
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Categorize the data
Analyze the data (Answer)
Summarize the data
All of the given options
Quiz Start Time: 08:50 PM Time Left 18
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Question # 5 of 10 ( Start time: 08:54:40 PM ) Total Marks: 1
In context of data mining definition, the term “nontrivial” means:
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Discovering information is a simple task
Discovering information is a complex task
We can not discover information
We simply find things rather than discovery (Answer)
Quiz Start Time: 08:50 PM Time Left 1
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Question # 6 of 10 ( Start time: 08:55:56 PM ) Total Marks: 1
Identify the TRUE statement:
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Clustering is unsupervised learning and classification is supervised learning
Clustering is supervised learning and classification is unsupervised learning
Both clustering and classification are unsupervised learning
Both clustering and classification are supervised learning
Quiz Start Time: 08:50 PM Time Left 27
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Question # 7 of 10 ( Start time: 08:57:26 PM ) Total Marks: 1
In ________learning you don’t know the number of clusters and no idea about their attributes.
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Supervised learning
Unsupervised learning (Answer)
Multi Dimension modeling
None of the given options
Quiz Start Time: 08:50 PM Time Left 50
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Question # 8 of 10 ( Start time: 08:58:39 PM ) Total Marks: 1
In context of clustering, the term “distance” means:
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Similarity/dissimilarly of records (Answer)
The difference between the primary keys of two records
The relation of a record with corresponding record in child table
None of the given options
Quiz Start Time: 08:50 PM Time Left 15
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Question # 9 of 10 ( Start time: 08:59:22 PM ) Total Marks: 1
In data mining, initially you _____ what you are looking for.
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Know
Don’t know (Answer)
May or may not know
None of the given options
Quiz Start Time: 08:50 PM Time Left 52
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Question # 10 of 10 ( Start time: 09:00:41 PM ) Total Marks: 1
The optimizer uses a hash join to join two tables if they are joined using an equijoin and
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Outer table has less number of rows
Inner table has less number of rows
Cardinality of tables is equal
Large amount of data needs to be joined (Answer)