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Data Warehousing

Below are Essay & Assignments tackled by us on Data Warehousing

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  • Assignment on Data warehousing methodologies
  • Data warehousing serves a pivotal role in supporting both strategic and operational decision-making processes. Major goals of data warehousing includes providing access to corporate and organization data, facilitating analytical information processing, efficient information retrieval and providing high quality information for decision making. In this essay, we will discuss the following methodologies and then compare them:
    1) The NCR Data Warehousing Methodology
    2) The Kimball Methodology
    3) Bill Inmon Methodology

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  • Data Mining and Warehousing questions answers
  • This report provides answers to the following questions -

    UNIT - 1
    1.Define Data mining.
    2.Give some alternative terms for data mining.
    3.What is KDD.
    4.What are the steps involved in KDD process.
    5.What is the use of the knowledge base?
    6.Arcitecture of a typical data mining system.
    7.Mention some of the data mining techniques.
    8.Give few statistical techniques.
    9.What is meta learning.
    10.Define Genetic algorithm.
    11.What is the purpose of Data mining Technique?
    12.Define Predictive model.
    13.Data mining tasks that are belongs to predictive model
    14.Define descriptive model
    15. Define the term summarization
    16. List out the advanced database systems.
    17. Define cluster analysis
    18.Classifications of Data mining systems.
    19.Describe challenges to data mining regarding data mining methodology and user
    interaction issues.
    20.Describe challenges to data mining regarding performance issues.
    21.Describe issues relating to the diversity of database types.
    22.What is meant by pattern?
    23.How is a data warehouse different from a database?

    UNIT - 2
    1. Define Association Rule Mining.
    2. When we can say the association rules are interesting?
    3. Explain Association rule in mathematical notations.
    4. Define support and confidence in Association rule mining.
    5. How are association rules mined from large databases?
    6. Describe the different classifications of Association rule mining.
    7. What is the purpose of Apriori Algorithm?
    8. Define anti-monotone property.
    9. How to generate association rules from frequent item sets?
    10. Give few techniques to improve the efficiency of Apriori algorithm.
    11. What are the things suffering the performance of Apriori candidate
    generation technique.
    12. Describe the method of generating frequent item sets without candidate
    generation.
    13. Define Iceberg query.
    14. Mention few approaches to mining Multilevel Association Rules
    15. What are multidimensional association rules?
    16. Define constraint-Based Association Mining.
    17. Define the concept of classification.
    18. What is Decision tree?
    19. What is Attribute Selection Measure?
    20. Describe Tree pruning methods.
    21. Define Pre Pruning
    22. Define Post Pruning.
    23. What is meant by Pattern?
    24. Define the concept of prediction.

    UNIT 3 -
    1.Define Clustering?
    2. What do you mean by Cluster Analysis?
    3. What are the fields in which clustering techniques are used?
    4.What are the requirements of cluster analysis?
    5.What are the different types of data used for cluster analysis?
    6. What are interval scaled variables?
    7. Define Binary variables? And what are the two types of binary variables?
    8. Define nominal, ordinal and ratio scaled variables?
    9. What do u mean by partitioning method?
    10. Define CLARA and CLARANS?
    11. What is Hierarchical method?
    12. Differentiate Agglomerative and Divisive Hierarchical Clustering?
    13. What is CURE?
    14. Define Chameleon method?
    15. Define Density based method?
    16. What is a DBSCAN?
    17. What do you mean by Grid Based Method?
    18. What is a STING?
    19. Define Wave Cluster?
    20. What is Model based method?
    21. What is the use of Regression?
    22. What are the reasons for not using the linear regression model to estimate the
    output data?
    23. What are the two approaches used by regression to perform classification?
    24. What do u mean by logistic regression?
    25. What is Time Series Analysis?
    26. What are the various detected patterns?
    27. What is Smoothing?
    28. Give the formula for Pearson’s r
    29. What is Auto regression?

    UNIT - 4
    1.Define data warehouse?
    2.What are operational databases?
    3.Define OLTP?
    4.Define OLAP?
    5.How a database design is represented in OLTP systems?
    6. How a database design is represented in OLAP systems?
    7.Write short notes on multidimensional data model?
    8.Define data cube?
    9.What are facts?
    10.What are dimensions?
    11.Define dimension table?
    12.Define fact table?
    13.What are lattice of cuboids?
    14.What is apex cuboid?
    15.List out the components of star schema?
    16.What is snowflake schema?
    17.List out the components of fact constellation schema?
    18.Point out the major difference between the star schema and the snowflake
    schema?
    19.Which is popular in the data warehouse design, star schema model (or)
    snowflake schema model?
    20.Define concept hierarchy?
    21.Define total order?
    22.Define partial order?
    23.Define schema hierarchy?
    24.List out the OLAP operations in multidimensional data model?
    25.What is roll-up operation?
    26.What is drill-down operation?
    27.What is slice operation?
    28.What is dice operation?
    29.What is pivot operation?
    30.List out the views in the design of a data warehouse?
    31.What are the methods for developing large software systems?
    32.How the operation is performed in waterfall method?
    33.How the operation is performed in spiral method?
    34.List out the steps of the data warehouse design process?
    35.Define ROLAP?
    36.Define MOLAP?
    37.Define HOLAP?
    38.What is enterprise warehouse?
    39.What is data mart?
    40.What are dependent and independent data marts?
    41.What is virtual warehouse?
    42.Define indexing?
    43.What are the types of indexing?
    44.Define metadata?
    45.Define VLDB?

    Unit 5 -
    1.What are the classifications of tools for data mining?
    2.What are commercial tools?
    3. What are Public domain Tools?
    4. What are Research prototypes?
    5.What is the difference between generic single-task tools and generic multi-task
    tools?
    6. What are the areas in which data warehouses are used in present and in future?
    7. What are the other areas for Data warehousing and data mining?
    8. Specify some of the sectors in which data warehousing and data mining are used?
    9. Describe the use of DBMiner.
    10. Applications of DBMiner.
    11. Give some data mining tools.
    12. Mention some of the application areas of data mining
    13. Differentiate data query and knowledge query
    14.Differentiate direct query answering and intelligent query answering.
    15. Define visual data mining
    16. What does audio data mining mean?
    17.What are the factors involved while choosing data mining system?
    18. Define DMQL
    19. Define text mining
    20. What does web mining mean
    21.Define spatial data mining.
    22. Explain multimedia data mining.

    Unit - 6 -
    1. Explain the evolution of Database technology?
    2.Explain the steps of knowledge discovery in databases?
    3. Explain the architecture of data mining system?
    4.Explain various tasks in data mining? or Explain the taxonomy of data mining tasks?
    5.Explain various techniques in data mining?
    6.Explain the issues regarding classification and prediction?
    7.Explain classification by Decision tree induction?
    8.Write short notes on patterns?
    9.Explain mining single –dimensional Boolean associated rules from transactional
    databases?
    10.Explain apriori algorithm?
    11.Explain how the efficiency of apriori is improved?
    12.Explain frequent item set without candidate without candidate generation?
    13. Explain mining Multi-dimensional Boolean association rules from transaction
    databases?
    14.Explain constraint-based association mining?
    15.Explain regression in predictive modeling?
    16.Explain statistical perspective in data mining?
    17. Explain Bayesian classification.
    18. Discuss the requirements of clustering in data mining.
    20. Explain the partitioning method of clustering.
    21. Explain Visualization in data mining.
    22. Discuss the components of data warehouse.
    23. List out the differences between OLTP and OLAP.
    24.Discuss the various schematic representations in multidimensional model.
    25. Explain the OLAP operations I multidimensional model.
    26. Explain the design and construction of a data warehouse.
    27.Expalin the three-tier data warehouse architecture.
    28. Explain indexing.
    29.Write notes on metadata repository.
    30. Write short notes on VLDB.
    31.Explain data mining applications for Biomedical and DNA data analysis.
    32. Explain data mining applications fro financial data analysis.
    33. Explain data mining applications for retail industry.
    34. Explain data mining applications for Telecommunication industry.
    35. Explain DBMiner tool in data mining.
    36. Explain how data mining is used in health care analysis.
    37. Explain how data mining is used in banking industry.
    38. Explain the types of data mining. ... Less

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  • Short paper on Data analysis
  • This paper is based on the following requirement -

    Data analysis is about using information and knowledge to make decisions. Although it can be presumed that the data is objective, it is possible to skew results due to heuristic errors and biases.
    Identify three biases that can influence the outcome of an analysis.
    Explain what they are and how they arise.
    Provide suggestions on how each bias can be minimized or overcome.
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