Database Management Extra 3

Question 1

A model that includes the object-oriented model’s best features in an inherently simpler relational database structural environment.

Answer 1

ERDM

Question 2

A meta-language used to represent and manipulate data elements. Unlike other markup languages, ??? permits the manipulation of a document’s data elements. ??? facilitates the exchange of structured documents such as orders and invoices over the Internet.

Answer 2

XML

Question 3

The application programmer’s view of the data environment. Given its business focus, an ??? ??? works with a data subset of the global database schema.

Answer 3

External Model

Question 4

The specific representation of an external view; the end user’s view of the data environment.

Answer 4

External Schema

Question 5

A Java based, open source, high speed, fault-tolerant distributed storage and computational framework. ??? uses low-cost hardware to create clusters of thousands of computer nodes to store and process data.

Answer 5

Hadoop

Question 6

A highly distributed, fault-tolerant file storage system designed to manage large amounts of data at high speeds.

Answer 6

HDFS

Question 7

An early database model whose basic concepts and characteristics formed the basis for subsequent database development. This model is based on an upside-down tree structure in which each record is called a segment. The top record is the root segment. Each segment has a 1:M relationship to the segment directly below it.

Answer 7

Hierarchical Model

Question 8

In database modeling, a level of data abstraction that adapts the conceptual model to a specific DBMS model for implementation. The ??? ??? is the representation of a database as “seen” by the DBMS. In other words, the ??? ??? requires a designer to match the conceptual model’s characteristics and constraints to those of the selected implementation model.

Answer 8

Internal Model

Question 9

A representation of an internal model using the database constructs supported by the chosen database.

Answer 9

Internal Schema

Question 10

A data model based on a structure composed of two data elements: a key and a value, in which every key has a corresponding value or set of values. The key-value data model is also called the associative or attribute-value data model.

Answer 10

key-value