WEEK 2 IBM DATA ANALYTICS
PROFESSIONAL CERTIFICATE EXAM
QUESTIONS AND ANSWERS
Document databases - Answer-database that stores each record and its associated
data within a single document.
They enable flexible indexing, powerful ad hoc queries, and analytics over
collections
of documents.
Column-based database - Answer-store data in cells grouped as columns of data
instead of rows.
Graph-based databases - Answer-database that uses a graphical model to represent
and store data.
They are particularly useful for visualizing, analyzing, and finding connections
between
different pieces of data.
Data - Answer-Facts and statistics collected together for reference or analysis
Descriptive Analytics - Answer-techniques that describe past performance and
history
Predictive Analytics - Answer-Statistical and analytical techniques used to develop
models that predict future events or behaviors.
Prescriptive Analytics - Answer-techniques that create models indicating the best
decision to make or course of action to take.
structured data - Answer-Data that (1) are typically numeric or categorical; (2) can be
organized and formatted in a way that is easy for computers to read, organize, and
understand; and (3) can be inserted into a database in a seamless fashion.
semi-structured data - Answer-data that has some organization but is not fully
organized to be inserted into a relational database
unstructured data - Answer-Data does not exist in a fixed location and can include
text documents, PDFs, voice messages, emails
XML - Answer-Extensible Markup Language, a way of writing data in a tree-
structured form by enclosing it in tags.
JSON - Answer-JavaScript Object Notation (JSON) - a popular data interchange
format, JSON is a technology standard often used to format data when being sent or
received via APIs.
PROFESSIONAL CERTIFICATE EXAM
QUESTIONS AND ANSWERS
Document databases - Answer-database that stores each record and its associated
data within a single document.
They enable flexible indexing, powerful ad hoc queries, and analytics over
collections
of documents.
Column-based database - Answer-store data in cells grouped as columns of data
instead of rows.
Graph-based databases - Answer-database that uses a graphical model to represent
and store data.
They are particularly useful for visualizing, analyzing, and finding connections
between
different pieces of data.
Data - Answer-Facts and statistics collected together for reference or analysis
Descriptive Analytics - Answer-techniques that describe past performance and
history
Predictive Analytics - Answer-Statistical and analytical techniques used to develop
models that predict future events or behaviors.
Prescriptive Analytics - Answer-techniques that create models indicating the best
decision to make or course of action to take.
structured data - Answer-Data that (1) are typically numeric or categorical; (2) can be
organized and formatted in a way that is easy for computers to read, organize, and
understand; and (3) can be inserted into a database in a seamless fashion.
semi-structured data - Answer-data that has some organization but is not fully
organized to be inserted into a relational database
unstructured data - Answer-Data does not exist in a fixed location and can include
text documents, PDFs, voice messages, emails
XML - Answer-Extensible Markup Language, a way of writing data in a tree-
structured form by enclosing it in tags.
JSON - Answer-JavaScript Object Notation (JSON) - a popular data interchange
format, JSON is a technology standard often used to format data when being sent or
received via APIs.
