CS614 Midterm Online Quiz

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

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

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.

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

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?

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.

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

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

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.

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

The goal of star schema design is to simplify ________

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

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

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-computed _______ can solve performance problems

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

Pre-join technique is used to avoid

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

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

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

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

The Kimball s iterative data warehouse development approach drew on decades of experience to develop the _________.

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.

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

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.

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

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

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

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

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

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.

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.

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

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 ____________.

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 _______.

NUMA stands for __________

To judge effectiveness we perform data profiling twice.

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

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

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

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

Which statement is true for De-Normalization?

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

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.

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

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

During ETL process of an organization, suppose you have data which can be transformed using any of the transformation method. Which of the following strategy will be your choice for least complexity?

Taken jointly, the extract programs or naturally evolving systems formed a spider web, also known as