ISDS 402 FINAL TEST QUESTIONS
ANSWERS CERTIFICATION PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED
A+
>> Star schema
Answer: Data modeling technique used to map multidimensional decision support data into a relational
database
>> Basic star schema components are
Answer: Facts are numeric values that represents a specific business aspect
>> Facts and Dimension tables
Answer: Normally represented by physical tables in data warehouse database
>> What is some performance-improving techniques for the star schema?
Answer: Normalizing Dimensional Tables
>> What does predictive analytics focus on?
Answer: Predictive analytics focuses on creating actionable models to predict future behaviors and
events
>> What areas are most predictive analytic models used in?
Answer: Used in areas such as healthcare services, customer relationships, customer service,
customer retention, fraud detection, targeted marketing, and optimized pricing
>> What is Big Data?
Answer: Data such as volume, velocity, and variety that is difficult for traditional relational databases
technologies to store and process it
>> What are the 3 Vs?
Answer: Volume: Quantity of data to be stored
>> Data Warehouse
Answer: An integrated, subject-oriented, time-variant, nonvolatile collection of data that provides
support for decision making
>> Data marts
Answer: Small, single subject data warehouse subset that provides decision support to a small group
of people (ex: finance, accounting, operations)
ANSWERS CERTIFICATION PAPER 2026
QUESTIONS WITH SOLUTIONS GRADED
A+
>> Star schema
Answer: Data modeling technique used to map multidimensional decision support data into a relational
database
>> Basic star schema components are
Answer: Facts are numeric values that represents a specific business aspect
>> Facts and Dimension tables
Answer: Normally represented by physical tables in data warehouse database
>> What is some performance-improving techniques for the star schema?
Answer: Normalizing Dimensional Tables
>> What does predictive analytics focus on?
Answer: Predictive analytics focuses on creating actionable models to predict future behaviors and
events
>> What areas are most predictive analytic models used in?
Answer: Used in areas such as healthcare services, customer relationships, customer service,
customer retention, fraud detection, targeted marketing, and optimized pricing
>> What is Big Data?
Answer: Data such as volume, velocity, and variety that is difficult for traditional relational databases
technologies to store and process it
>> What are the 3 Vs?
Answer: Volume: Quantity of data to be stored
>> Data Warehouse
Answer: An integrated, subject-oriented, time-variant, nonvolatile collection of data that provides
support for decision making
>> Data marts
Answer: Small, single subject data warehouse subset that provides decision support to a small group
of people (ex: finance, accounting, operations)
