CS614 Midterm Online Quiz

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

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 _______.

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 ___________

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.

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

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 ____________.

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.

30.Data Warehouse is about taking / colleting data from different ________ sources:

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

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

Slice and Dice is changing the view of the data.

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.

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

People that design and build the data warehouse must be capable of working across the organization at all levels

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.

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

The STAR schema used for data design is a __________ consisting of fact and dimension tables. :

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

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

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

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

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.

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 ____________

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

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

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

Many data warehouse project teams waste enormous amounts of time searching in vain for a _______.

DSS queries do not involve a primary key

De-Normalization normally speeds up

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

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

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

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

_____modeling technique is more appropriate for data warehouses.

Analytical processing uses ____________ , instead of record level access.

_____________, if fits into memory , costs only one disk I/O access to locate a record by given key.

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

In _________ system, the contents change with time. :

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

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

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

Pre-join technique is used to avoid

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

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

Non uniform distribution, when the data is distributed across the processors, is called ______.

De-Normalization normally speeds up

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