CS614 Quiz No. 2 Solution and Discussion


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  • 1_ As per Bill Inmost, a data warehouse, in contrast with classical applications is:

    Data driven _ pg285

    2_ Which of the following is NOT one of the three parallel tracks in Kimball’s approach?
    Lifecycle Maintenance track

    3_ Bill Inmon argues that requirements are well understood only after
    Data warehouse is populated _ pg285

    4_ Goal driven approach of data warehouse development was result of ______ work
    Böhnlein and Ulbrich-vom _ pg285

    5_ Identify the TRUE statement:
    Clustering is unsupervised learning and classification is supervised learning _ pg 270

    6_ Normally the term “DWH face to the business user” refers to:
    Lifecycle Analytical Applications track _ pg 306

    7_ In ________learning you don’t know the number of clusters and no idea about their attributes.
    Unsupervised learning
    https://www.cs.uic.edu/~liub/teach/cs583-fall-05/CS583-unsupervised-learning.ppt

    8_ Waterfall model is appropriate when
    Requirements are clearly defined _ pg 284

    9_ Implementation of a data warehouse requires ________ activities.
    none of above

    10_ Normally the input data structure (a database table) for a data mining algorithm:
    Has more number of records than attributes (not sure)



  • Quiz Start Time: 04:09 PM Time Left 49
    sec(s)

    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
    Select correct option:

    O(MN) (Correct)

    Quiz Start Time: 04:09 PM Time Left 35
    sec(s)

    Question # 2 of 10 ( Start time: 04:11:20 PM ) Total Marks: 1
    In context of data mining definition, the term “value” means:
    Select correct option:

    importance of hidden perameters discovered (Correct)

    Quiz Start Time: 04:09 PM Time Left 56
    sec(s)

    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 ____________.
    Select correct option:

    Class (Correct)

    Quiz Start Time: 04:09 PM Time Left 25
    sec(s)

    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
    Select correct option:

    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
    sec(s)

    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
    Select correct option:

    Independent (Correct)

    Quiz Start Time: 04:09 PM Time Left 13
    sec(s)

    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:
    Select correct option:

    Quiz Start Time: 04:09 PM Time Left 12
    sec(s)

    Question # 7 of 10 ( Start time: 04:18:07 PM ) Total Marks: 1
    Mining multi dimensional databases allow users to:
    Select correct option:

    Analyze Data (Correct)

    Quiz Start Time: 04:09 PM Time Left 24
    sec(s)

    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.
    Select correct option:

    Knowledge discovery in database (Correct)

    Quiz Start Time: 04:09 PM Time Left 17
    sec(s)

    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
    Select correct option:

    One Time (Correct)

    Quiz Start Time: 04:09 PM Time Left 10
    sec(s)

    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
    sec(s)

    Question # 1 of 10 ( Start time: 08:50:34 PM ) Total Marks: 1
    In context of data mining definition, the term “value” means:
    Select correct option:

    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
    sec(s)

    Question # 2 of 10 ( Start time: 08:51:23 PM ) Total Marks: 1
    Data mining is all about:
    Select correct option:

    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
    sec(s)

    Question # 3 of 10 ( Start time: 08:52:41 PM ) Total Marks: 1
    In contrast to statistics, data mining is ______ driven.
    Select correct option:

    Assumption (Answer)
    Knowledge
    Human
    Database

    Quiz Start Time: 08:50 PM Time Left 55
    sec(s)

    Question # 4 of 10 ( Start time: 08:53:56 PM ) Total Marks: 1
    Mining multi dimensional databases allow users to:
    Select correct option:

    Categorize the data
    Analyze the data (Answer)
    Summarize the data
    All of the given options

    Quiz Start Time: 08:50 PM Time Left 18
    sec(s)

    Question # 5 of 10 ( Start time: 08:54:40 PM ) Total Marks: 1
    In context of data mining definition, the term “nontrivial” means:
    Select correct option:

    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
    sec(s)

    Question # 6 of 10 ( Start time: 08:55:56 PM ) Total Marks: 1
    Identify the TRUE statement:
    Select correct option:

    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
    sec(s)

    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.
    Select correct option:

    Supervised learning
    Unsupervised learning (Answer)
    Multi Dimension modeling
    None of the given options

    Quiz Start Time: 08:50 PM Time Left 50
    sec(s)

    Question # 8 of 10 ( Start time: 08:58:39 PM ) Total Marks: 1
    In context of clustering, the term “distance” means:
    Select correct option:

    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
    sec(s)

    Question # 9 of 10 ( Start time: 08:59:22 PM ) Total Marks: 1
    In data mining, initially you _____ what you are looking for.
    Select correct option:

    Know
    Don’t know (Answer)
    May or may not know
    None of the given options

    Quiz Start Time: 08:50 PM Time Left 52
    sec(s)

    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
    Select correct option:

    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)



  • In contrast to data mining, statistics is ______ driven. CS614
    073574bf-d5f3-42b7-b52b-37c8a4a3de3d-image



  • Which of the following is NOT one of the methodologies for Data Warehouse project development?

    System Driven



  • Which of the following is NOT one of the three parallel tracks in Kimballs approach? CS614



  • Implementation of a data warehouse requires ________ activities

    Highly integrated

    Loosely integrated

    Tightly decoupled

    None of the given



  • An effective user education program includes, among others, the following guideline(s):

    bdbe9a2f-8438-4cad-a916-12f573d62471-image



  • “If resources increase in proportion to increase in data size, time is constant”. The statement refers to:

    9c6926fd-f29e-42b2-993a-f1b9ad44643e-image
    8e9d55a5-335f-4d45-8fee-d14cb6975ce2-image



  • Data mining is all about:



  • In context of data parallelism, to get a speed-up of N with N partitions, it must be ensured that:
    24833b95-8872-4181-91e6-a03d1854a8dc-image



  • Vertically wide data means:



  • In context of the most fundamental data warehouse life cycle model, which of the following is NOT one of the data warehouse design activities?
    Select correct option:
    End-user interviews and re-interviews
    Source system cataloguing
    Definition of key performance indicators
    System vision development



  • Quiz Start Time: 04:09 PM Time Left 49
    sec(s)

    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
    Select correct option:

    O(MN) (Correct)

    Quiz Start Time: 04:09 PM Time Left 35
    sec(s)

    Question # 2 of 10 ( Start time: 04:11:20 PM ) Total Marks: 1
    In context of data mining definition, the term “value” means:
    Select correct option:

    importance of hidden perameters discovered (Correct)

    Quiz Start Time: 04:09 PM Time Left 56
    sec(s)

    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 ____________.
    Select correct option:

    Class (Correct)

    Quiz Start Time: 04:09 PM Time Left 25
    sec(s)

    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
    Select correct option:

    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
    sec(s)

    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
    Select correct option:

    Independent (Correct)

    Quiz Start Time: 04:09 PM Time Left 13
    sec(s)

    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:
    Select correct option:

    Quiz Start Time: 04:09 PM Time Left 12
    sec(s)

    Question # 7 of 10 ( Start time: 04:18:07 PM ) Total Marks: 1
    Mining multi dimensional databases allow users to:
    Select correct option:

    Analyze Data (Correct)

    Quiz Start Time: 04:09 PM Time Left 24
    sec(s)

    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.
    Select correct option:

    Knowledge discovery in database (Correct)

    Quiz Start Time: 04:09 PM Time Left 17
    sec(s)

    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
    Select correct option:

    One Time (Correct)

    Quiz Start Time: 04:09 PM Time Left 10
    sec(s)

    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
    sec(s)

    Question # 1 of 10 ( Start time: 08:50:34 PM ) Total Marks: 1
    In context of data mining definition, the term “value” means:
    Select correct option:

    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
    sec(s)

    Question # 2 of 10 ( Start time: 08:51:23 PM ) Total Marks: 1
    Data mining is all about:
    Select correct option:

    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
    sec(s)

    Question # 3 of 10 ( Start time: 08:52:41 PM ) Total Marks: 1
    In contrast to statistics, data mining is ______ driven.
    Select correct option:

    Assumption (Answer)
    Knowledge
    Human
    Database

    Quiz Start Time: 08:50 PM Time Left 55
    sec(s)

    Question # 4 of 10 ( Start time: 08:53:56 PM ) Total Marks: 1
    Mining multi dimensional databases allow users to:
    Select correct option:

    Categorize the data
    Analyze the data (Answer)
    Summarize the data
    All of the given options

    Quiz Start Time: 08:50 PM Time Left 18
    sec(s)

    Question # 5 of 10 ( Start time: 08:54:40 PM ) Total Marks: 1
    In context of data mining definition, the term “nontrivial” means:
    Select correct option:

    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
    sec(s)

    Question # 6 of 10 ( Start time: 08:55:56 PM ) Total Marks: 1
    Identify the TRUE statement:
    Select correct option:

    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
    sec(s)

    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.
    Select correct option:

    Supervised learning
    Unsupervised learning (Answer)
    Multi Dimension modeling
    None of the given options

    Quiz Start Time: 08:50 PM Time Left 50
    sec(s)

    Question # 8 of 10 ( Start time: 08:58:39 PM ) Total Marks: 1
    In context of clustering, the term “distance” means:
    Select correct option:

    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
    sec(s)

    Question # 9 of 10 ( Start time: 08:59:22 PM ) Total Marks: 1
    In data mining, initially you _____ what you are looking for.
    Select correct option:

    Know
    Don’t know (Answer)
    May or may not know
    None of the given options

    Quiz Start Time: 08:50 PM Time Left 52
    sec(s)

    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
    Select correct option:

    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)



  • Quiz Start Time: 04:09 PM Time Left 49
    sec(s)

    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
    Select correct option:

    O(MN) (Correct)

    Quiz Start Time: 04:09 PM Time Left 35
    sec(s)

    Question # 2 of 10 ( Start time: 04:11:20 PM ) Total Marks: 1
    In context of data mining definition, the term “value” means:
    Select correct option:

    importance of hidden perameters discovered (Correct)

    Quiz Start Time: 04:09 PM Time Left 56
    sec(s)

    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 ____________.
    Select correct option:

    Class (Correct)

    Quiz Start Time: 04:09 PM Time Left 25
    sec(s)

    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
    Select correct option:

    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
    sec(s)

    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
    Select correct option:

    Independent (Correct)

    Quiz Start Time: 04:09 PM Time Left 13
    sec(s)

    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:
    Select correct option:

    Quiz Start Time: 04:09 PM Time Left 12
    sec(s)

    Question # 7 of 10 ( Start time: 04:18:07 PM ) Total Marks: 1
    Mining multi dimensional databases allow users to:
    Select correct option:

    Analyze Data (Correct)

    Quiz Start Time: 04:09 PM Time Left 24
    sec(s)

    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.
    Select correct option:

    Knowledge discovery in database (Correct)

    Quiz Start Time: 04:09 PM Time Left 17
    sec(s)

    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
    Select correct option:

    One Time (Correct)

    Quiz Start Time: 04:09 PM Time Left 10
    sec(s)

    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
    sec(s)

    Question # 1 of 10 ( Start time: 08:50:34 PM ) Total Marks: 1
    In context of data mining definition, the term “value” means:
    Select correct option:

    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
    sec(s)

    Question # 2 of 10 ( Start time: 08:51:23 PM ) Total Marks: 1
    Data mining is all about:
    Select correct option:

    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
    sec(s)

    Question # 3 of 10 ( Start time: 08:52:41 PM ) Total Marks: 1
    In contrast to statistics, data mining is ______ driven.
    Select correct option:

    Assumption (Answer)
    Knowledge
    Human
    Database

    Quiz Start Time: 08:50 PM Time Left 55
    sec(s)

    Question # 4 of 10 ( Start time: 08:53:56 PM ) Total Marks: 1
    Mining multi dimensional databases allow users to:
    Select correct option:

    Categorize the data
    Analyze the data (Answer)
    Summarize the data
    All of the given options

    Quiz Start Time: 08:50 PM Time Left 18
    sec(s)

    Question # 5 of 10 ( Start time: 08:54:40 PM ) Total Marks: 1
    In context of data mining definition, the term “nontrivial” means:
    Select correct option:

    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
    sec(s)

    Question # 6 of 10 ( Start time: 08:55:56 PM ) Total Marks: 1
    Identify the TRUE statement:
    Select correct option:

    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
    sec(s)

    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.
    Select correct option:

    Supervised learning
    Unsupervised learning (Answer)
    Multi Dimension modeling
    None of the given options

    Quiz Start Time: 08:50 PM Time Left 50
    sec(s)

    Question # 8 of 10 ( Start time: 08:58:39 PM ) Total Marks: 1
    In context of clustering, the term “distance” means:
    Select correct option:

    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
    sec(s)

    Question # 9 of 10 ( Start time: 08:59:22 PM ) Total Marks: 1
    In data mining, initially you _____ what you are looking for.
    Select correct option:

    Know
    Don’t know (Answer)
    May or may not know
    None of the given options

    Quiz Start Time: 08:50 PM Time Left 52
    sec(s)

    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
    Select correct option:

    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)




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