CS614 Midterm Online Quiz

Multidimensional databases typically use proprietary __________ format to store pre-summarized cube structures.

If every key in the data file is represented in the index file then index is :

A single database, couldn‟t serve both operational high performance transaction processing and DSS, analytical processing, all at the same time.

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

The divide & conquer cube partitioning approach helps alleviate the ____________ limitations of MOLAP implementation.

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

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

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.

De-Normalization normally speeds up

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

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

The automated, prospective analyses offered by data mining move beyond the analyses of past events provided by _____________ tools typical of decision support systems.

Focusing on data warehouse delivery only often end up _________.

The goal of star schema design is to simplify ________

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?

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 users of data warehouse are knowledge workers in other words they are _______in the organization.

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 ____________.

Collapsing tables can be done on the ___________ relationships

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:

_______________, if too big and does not fit into memory, will be expensive when used to find a record by given key.

: An optimized structure which is built primarily for retrieval, with update being only a secondary consideration is

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

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

Pre-computed _______ can solve performance problems

To identify the __________________ required we need to perform data profiling

DTS allows us to connect through any data source or destination that is supported by ____________

DTS allows us to connect through any data source or destination that is supported by ____________

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 ___________

For a given data set, to get a global view in un-supervised learning we use

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

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.

Grain is the ________ level of data stored in the warehouse.

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.

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.

Data mining is a/an ______ approach , where browsing through data using mining techniques may reveal something that might be of interest to the user as information that was unknown previously.

All data is ______________ of something real. I An Abstraction II A Representation Which of the following option is true?

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

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

Data Warehouse provides the best support for analysis while OLAP carries out the _________ task.

As apposed to the out come of classification, estimation deal with ____________ valued outcome.

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.

If w is the window size and n is the size of data set, then the complexity of merging phase in BSN method is___________

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

B-Tree is used as an index to provide access to records

NUMA stands for __________

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

A dense index, if fits into memory, costs only ______ disk I/O access to locate a record by given key.

Investing years in architecture and forgetting the primary purpose of solving business problems, results in inefficient application. This is the example of _________ mistake.

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