CS614 Midterm Online Quiz

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?

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.

De-Normalization normally speeds up

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

The need to synchronize data upon update is called

Pre-computed _______ can solve performance problems

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

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

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

Data mining evolve as mechanism to cater the limitations of _____ systems to deal massive data sets with high dimensionality, new data types, multiple heterogeneous data resources etc...

A ________ dimension is a collection of random transactional codes, flags and/text attributes that are unrelated to any particular dimension. The ______ dimension is simply a structure that provides a convenient place to store the ______ attributes.

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.

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

In _________ system, the contents change with time. :

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

Which statement is true for De-Normalization?

5 million bales.

For a relation to be in 4NF it must be:-

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

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

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.

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.

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:

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

Focusing on data warehouse delivery only often end up _________.

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

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

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

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.

The goal of star schema design is to simplify ________

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

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

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

Normalization effects performance

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

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

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

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

 ________ gives total view of an organization

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

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

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.

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 ___________

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.

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

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

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

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