CS614 Midterm Online Quiz

5 million bales.

Horizontal splitting breaks a table into multiple tables based upon_______

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

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

It is observed that every year the amount of data recorded in an organization :

The growth of master files and magnetic tapes exploded around the mid- _______. :

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

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.

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

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

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:

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:

Multi-dimensional databases (MDDs) typically use ___________ formats to store pre-summarized cube structures.

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

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

DSS queries do not involve a primary key

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

Which statement is true for De-Normalization?

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

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

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

Relational databases allow you to navigate the data in ____________ that is appropriate using the primary, foreign key structure within the data model.

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

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

If „M‟ rows from table-A match the conditions in the query then table-B is accessed „M‟ times. Suppose table-B has an index on the join column. If „a‟ I/Os are required to read the data block for each scan and „b‟ I/Os for each data block then the total cost of accessing table-B is _____________ logical I/Os approximately.

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.

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

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

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 ___________

Slice and Dice is changing the view of the data.

De-Normalization normally speeds up

Naturally Evolving architecture occurred when an organization had a _______ approach to handling the whole process of hardware and software architecture.

.______ is class of Decision Support Environment.

The goal of ______is to look at as few block as possible to find the matching records.

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

Transactional fact tables do not have records for events that do not occur. These are called

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

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.

To measure or quantify the similarity or dissimilarity, different techniques are available. Which of the following option represent the name of available techniques?

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

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

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.

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

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

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

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

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.

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

There are many variants of the traditional nested-loop join, if there is an index is exploited, then it is called……

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.