CS614 Midterm Online Quiz

Pre-join technique is used to avoid

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

Node of a B-Tree is stored in memory block and traversing a B-Tree involves ______ page faults.

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

5 million bales.

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

Pre-computed _______ can solve performance problems

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

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

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

Analytical processing uses ____________ , instead of record level access.

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

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.

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

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

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

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

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.

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

_____modeling technique is more appropriate for data warehouses.

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

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

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

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.

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

 ________ gives total view of an organization

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

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

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.

DSS queries do not involve a primary key

The need to synchronize data upon update is called

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

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 ___________

Virtual cube is used to query two similar cubes by creating a third “virtual” cube by a join between two cubes.

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

Normalization effects performance

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 _______.

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

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:

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

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

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

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

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.

To identify the __________________ required we need to perform data profiling

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

.______ is class of Decision Support Environment.

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

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.