CS614 Midterm Online Quiz

DOLAP allows download of “cube” structures to a desktop platform with the need for shared relational or cube server.

In DWH project, it is assured that ___________ environment is similar to the production environment

The degree of similarity between two records, often measured by a numerical value between _______, usually depends on application characteristics.

_________ breaks a table into multiple tables based upon common column values.

Change Data Capture is one of the challenging technical issues in _____________

In a traditional MIS system, there is an almost linear sequence of queries.

Analytical processing uses ____________ , instead of record level access.

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 ____________.

For a DWH project, the key requirement are ________ and product experience.

: The goal of ___________ is to look at as few blocks as possible to find the matching records(s).

The goal of ideal parallel execution is to completely parallelize those parts of a computation that are not constrained by data dependencies. The __________ the portion of the program that must be executed sequentially, the greater the scalability of computation.

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:

The technique that is used to perform these feats in data mining modeling, and this act of model building is something that people have been doing for long time, certainly before the _______ of computers or data mining technology.

Virtual cube is used to query two similar cubes by creating a third “virtual” cube by a join between two cubes.

Data mining uses _________ algorithms to discover patterns and regularities in data.

The automated, prospective analyses offered by data mining move beyond the analysis of past events provided by respective tools typical of ___________.

Cube is a __________ entity containing values of a certain fact at a certain aggregation level at an intersection of a combination of dimensions.

To judge effectiveness we perform data profiling twice.

In horizontal splitting, we split a relation into multiple tables on the basis of

During the application specification activity, we also must give consideration to the organization of the applications.

Horizontal splitting breaks a table into multiple tables based upon_______

Pipeline parallelism focuses on increasing throughput of task execution, NOT on __________ sub-task execution time.

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 ___________

De-Normalization normally speeds up

With data mining, the best way to accomplish this is by setting aside some of your data in a vault 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 _______.

____________ in agriculture extension is that pest population beyond which the benefit of spraying outweighs its cost.

_____________ is a process which involves gathering of information about column through execution of certain queries with intention to identify erroneous records.

A data warehouse implementation without an OLAP tool is always possible.

Which statement is true for De-Normalization?

When performing objective assessments, companies follow a set of principles to develop metrics specific to their needs, there is hard to have “one size fits all” approach. Which of the following statement represents the pervasive functional forms?

Pakistan is one of the five major ________ countries in the world.

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.

in agriculture extension is that pest population beyond which the benefit of spraying outweighs levels

The performance in a MOLAP cube comes from the O(1) look-up time for the array data structure.

Pre-computed _______ can solve performance problems

For a smooth DWH implementation we must be a technologist.

_____ contributes to an under-utilization of valuable and expensive historical data, and inevitably results in a limitedcapability to provide decision support and analysis.

During ETL process of an organization, suppose you have data which can be transformed using any of the transformation method. Which of the following strategy will be your choice for least complexity?

DSS queries do not involve a primary key

NUMA stands for __________

Ad-hoc access means to run such queries which are known already.

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

The purpose of the House of Quality technique is to reduce ______ types of risk.

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.

Analytical processing uses ____________ , instead of record level access.

________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.

The input to the data warehouse can come from OLTP or transactional system but not from other third party database.

Rearranging the grouping of source data, delivering it to the destination database, and ensuring the quality of data are crucial to the process of loading the data warehouse. Data ____________ is vitally important to the overall health of a warehouse project. 1. Cleansing 2. Cleaning 3. Scrubbing Which of the following options is true?

Suppose the amount of data recorded in an organization is doubled every year. This increase is __________ .

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.