CS614 Midterm Online Quiz

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.

NUMA stands for __________

Analytical processing uses ____________ , instead of record level access.

Pre-computed _______ can solve performance problems

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

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

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

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

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:

We must try to find the one access tool that will handle all the needs of their users.

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

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.

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

Horizontal splitting breaks a table into multiple tables based upon_______

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

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

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

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

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

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

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

Data Transformation Services (DTS) provide a set of _____ that lets you extract, transform, and consolidate data from disparate sources into single or multiple destinations supported by DTS connectivity.

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

_______ is an application of information and data.

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

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

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

.______ is class of Decision Support Environment.

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.

DSS queries do not involve a primary key

Focusing on data warehouse delivery only often end up _________.

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

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

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

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

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

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

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

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.

 ________ gives total view of an organization

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

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.

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 ____________.

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

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

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

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

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

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

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