VU Final Term Past Papers
239 solved final term past paper MCQs for CS614 (Data Warehousing) at Virtual University, each with the correct answer marked. Use them to learn the VU question style and test your recall. An independent study tool — not affiliated with VU.
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Q1. The STAR schema used for data design is a consisting of fact and dimension tables.
Q2. To identify the required we need to perform data profiling
Q3. Companies collect and record their own operational data, but at the same time they also use reference data obtained from sources such as codes, prices etc.
Q4. Ad-hoc access means to run such queries which are known already.
Q5. People that design and build the data warehouse must be capable of working across the organization at all levels
Q6. The is only a small part in realizing the true business value buried within the mountain of data collected and stored within organizations business systems and operational databases.
Q7. Relational databases allow you to navigate the data in that is appropriate using the primary, foreign key structure within the data model.
Q8. DSS queries do not involve a primary key
Q9. Data Transformation Services (DTS) provide a set of that lets you extract, transform, and consolidate data from disparate sources into single or multipledestinations supported by DTS connectivity.
Q10. The need to synchronize data upon update is called
Q11. Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as
Q12. Node of a B-Tree is stored in memory block and traversing a B-Tree involves page faults.
Q13. As apposed to the out come of classification, estimation deal with valued outcome.
Q14. The goal of is to look at as few block as possible to find the matching records.
Q15. De-Normalization normally speeds up
Q16. In horizontal splitting, we split a relation into multiple tables on the basis of
Q17. For good decision making, data should be integrated across the organization to cross the LoB (Line of Business). This is to give the total view of organization from:
Q18. A data warehouse may include
Q19. Multidimensional databases typically use proprietary format to store pre-summarized cube structures.
Q20. A dense index, if fits into memory, costs only disk I/O access to locate a record by given key.
Q21. All data is of something real. I An Abstraction II A Representation Which of the following option is true?
Q22. The key idea behind is to take a big task and break it into subtasks that can be processed concurrently on a stream of data inputs in multiple, overlapping stages of execution.
Q23. Non uniform distribution, when the data is distributed across the processors, is called .
Q24. The goal of ideal parallel execution is to completely parallelize those parts of a computation that are not constrained by data dependencies. The smaller the portion of the program that must be executed , the greater the scalability of the computation.
Q25. Data mining is a/an approach, where browsing through data using data mining techniques may reveal something that might be of interest to the user as information that was unknown previously.
Q26. Data mining evolve as a mechanism to cater the limitations of systems to deal massive data sets with high dimensionality, new data types, multiple heterogeneous data resources etc.
Q27. To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?
Q28. For a given data set, to get a global view in un-supervised learning we use
Q29. In DWH project, it is assured that environment is similar to the production environment
Q30. For a DWH project, the key requirement are and product experience.
Q31. Pipeline parallelism focuses on increasing throughput of task execution, NOT on sub-task execution time.
Q32. Many data warehouse project teams waste enormous amounts of time searching in vain for a .
Q33. Focusing on data warehouse delivery only often end up .
Q34. Pakistan is one of the five major countries in the world.
Q35. DTS allows us to connect through any data source or destination that is supported by _
Q36. Execution can be completed successfully or it may be stopped due to some error. In case of successful completion of execution all the transactions will be
Q37. If some error occurs, execution will be terminated abnormally and all transactions will be rolled back. In this case when we will access the database we will find it in the state that was before the .
Q38. To judge effectiveness we perform data profiling twice.
Q39. It is observed that every year the amount of data recorded in an organization is
Q40. Pre-computed can solve performance problems
Q41. , if fits into memory, costs only one disk I/O access to locate a record by given key.
Q42. The purpose of the House of Quality technique is to reduce types of risk.
Q43. NUMA stands for
Q44. There are many variants of the traditional nested-loop join. If the index is built as part of the query plan and subsequently dropped, it is called
Q45. Data mining derives its name from the similarities between searching for valuable business information in a large database, for example, finding linked products in gigabytes of store scanner data, and mining a mountain for a of valuable ore.
Q46. With data mining, the best way to accomplish this is by setting aside some of your data in a to isolate it from the mining process; once the mining is complete, the results can be tested against the isolated data to confirm the model's validity.
Q47. The Kimball s iterative data warehouse development approach drew on decades of experience to develop the .
Q48. We must try to find the one access tool that will handle all the needs of their users.
Q49. For a smooth DWH implementation we must be a technologist.
Q50. During the application specification activity, we also must give consideration to the organization of the applications.
Q51. Investing years in architecture and forgetting the primary purpose of solving business problems, results in inefficient application. This is the example of mistake.
Q52. The most recent attack is the attack on the cotton crop during 2003- 04, resulting in a loss of nearly 0.5 million bales.
Q53. The users of data warehouse are knowledge workers in other words they are in the organization.
Q54. ____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
Q55. ________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.
Q56. _____________ is a process which involves gathering of information about column through execution of certain queries with intention to identify erroneous records.
Q57. __________________ contributes to an under-utilization of valuable and expensive historical data, and inevitably results in a limitedcapability to provide decision support and analysis.
Q58. The telecommunications data warehouse is dominated by the sheer volume of data generated at the call level ______ area.
Q59. ER Model can be simplified in -------- ways
Q60. There are actually two ways of “simplifying” the ER model i.e. (i) De-normalization and (ii) Dimensional Modeling. 5. Non recording facts have a disadvantage that it has
Q61. Fact-less fact table is a fact table without numeric fact columns. It is used to capture relationship between __________
Q62. A cube is not a data warehouse, it is a _______________
Q63. _______________, if too big and doesn‟t fit into the memory will be expensive when used to find a record by given key.
Q64. _______operator is conservative in that it assigns to the dimension an aggregate value no higher than the value of its weakest data quality indicator.
Q65. Parallel execution dramatically reduces response time for ________ operations on large databases typically associated with Decision Support Systems (DSS) and data warehouses.
Q66. Data dependencies between different phases of computation introduce synchronization requirements that force ________ execution.
Q67. Maintaining locking consistency over all nodes can become a problem in large clusters. This is the disadvantage of
Q68. Performance is dictated by the _______ stage in the pipeline.
Q69. An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is
Q70. During business hours, most ______ systems should probably not use parallel execution.
Q71. There are many variants of the traditional nested-loop join. If there is an index and that index is exploited, then it is called
Q72. There are many variants of the traditional nested-loop join. When the entire table is scanned it is called
Q73. If someone told you that he had a good model to predict customer usage, the first thing you might try would be to ask him to apply his model to your customer _______, where you already knew the answer.
Q74. Data mining uses _________ algorithms to discover patterns and regularities in data.
Q75. Classification consists of examining the properties of a newly presented observation and assigning it to a predefined ____________.
Q76. As opposed to the outcome of classification, estimation deal with __________ valued outcome.
Q77. Giving the least time to _________ can prove suicidal to the DWH project.
Q78. The application development quality-assurance activities cannot be completed until the data is ________.
Q79. Many data warehouse project teams waste enormous amounts of time searching in vain for a silver bullet i.e. a panacea or Amratdhara 31. Focusing on data warehouse delivery only often end up _________.
Q80. Multan, a division in southern Punjab, is known as the agricultural hub of the country. Multan accounts for 70% cotton production of the country. 34. ____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.
Q81. If we remove the modification anomalies the table comes in ________ form
Q82. Modification anomalies occur in _________ form
Q83. Execution can be completed successfully or it may be stopped due to some error. If some error occurs, execution will be terminated abnormally and all transactions will be ___________
Q84. To identify the degree of transformation required we need to perform _________.
Q85. If the dates are missing we must need to consult _________.
Q86. In MOLAP physically build cubes for direct access, support is not available for ______ SQL.
Q87. MOLAP physically builds “cubes” for direct access - usually in the proprietary file format of a multi-dimensional database (MDD) or a user defined data structure. Therefore ANSI SQL is not supported. 46. ______ is the lowest level of detail or the atomic level of data stored in the warehouse.
Q88. After implementing Change Data Capture, the advantage we have is that, data is able to be integrated and transformed __________
Q89. In the Information Age, the _________ learning organization is at a distinct disadvantage. This term means "impaired functioning
Q90. Many DW projects do not deliver to full potential because they treat data quality as a one-time undertaking as part of UAT. Here UAT stands for
Q91. Parallelism can ________system performance on over-utilized systems or systems with small I/O bandwidth.
Q92. In contrast to data mining, statistics is ______ driven.
Q93. A _______ implementation approach is generally useful for projects where the technology is mature and well understood, as well as where the business problems that must be solved are clear and well understood.
Q94. Implementing a data warehouse requires _________ integrated activities.
Q95. Pipeline parallelism focuses on increasing _____________ of task execution.
Q96. One needs to slot the alternative tools into categories that allow for meaningful comparison in order to _____________.
Q97. ____________is a systematic field sampling process that provide field specific information on pest pressure and crop injury.
Q98. The growth of master files and magnetic tapes exploded around the mid- _______.
Q99. Redundancy causes _________ anomalies
Q100. Data Transformation Services (DTS) provide a set of _____ that lets you extract, transform, and transformation required we need to perform into single or multiple destinations supported by DTS connectivity.
Q101. Data Transformation Services (DTS) provide a set of tools that lets you extract, transform, and consolidate data from disparate sources into ______________ supported by DTS connectivity.
Q102. In ROLAP access to information is provided via relational database using _________ standard SQL.
Q103. Which of the following statement is true? 1 PB is
Q104. Normally Selectivity of query in OLTP system is
Q105. Normally Selectivity of query in data warehouse is
Q106. One major goal of horizontal splitting is
Q107. The _________ measures the ratio of desired outcomes to total outcomes.
Q108. In 1972 the Mitsubishi Shipyards in Kobe developed a technique in which customer wants were linked to product specifications via a matrix format. This technique is known today as:
Q109. ________________ improve the overall data design and use data standards.
Q110. It must be ensured that, there are enough computing resources, Query-coordinator is very fast as compared to query servers, Work done in each partition almost same to avoid performance bottlenecks
Q111. The automated, prospective analyses offered by data mining move beyond the analyses of past events provided by _____________ tools typical of decision support systems.
Q112. The automated, prospective analyses offered by data mining move beyond the analyses of past events provided by retrospective tools typical of ______________.
Q113. ________ gives total view of an organization
Q114. Data recorded by pest scouts consists of two parts:
Q115. Experience showed that for a single pass magnetic tape that scanned 100% of the records, only _________ of the records, sometimes even were actually required.
Q116. It is observed that every year the amount of data recorded in an organization
Q117. Normalized design is likely to perform much faster than de-normalized design for queries that probe
Q118. Partition elimination is not possible with
Q119. ER is a logical design technique that seeks to remove the _____________ in data.
Q120. ER is a _______ design technique that seeks to remove the redundancy in data.
Showing the first 120 of 239 MCQs.