CS614 Midterm Online Quiz

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

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

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

Horizontal splitting breaks a table into multiple tables based upon_______

Collapsing tables can be done on the ___________ relationships

It is observed that every year the amount of data recorded in anorganization is

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.

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

Focusing on data warehouse delivery only often end up _________.

 ________ gives total view of an organization

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

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.

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

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.

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.

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

NUMA stands for __________

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.

________ is the technique in which existing heterogeneous segments are reshuffled, relocated into homogeneous segments.

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

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

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

Ad-hoc access means to run such queries which are known already.

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

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

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

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 ____________.

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

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

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.

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

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

_____modeling technique is more appropriate for data warehouses.

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

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

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

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.

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...

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 w is the window size and n is the size of data set, then the complexity of merging phase in BSN method is___________

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

De-Normalization normally speeds up

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

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

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 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.

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

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