Chapter 5: Databases and Data Analytics Lecture

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What type of database model works with unstructured data, such as photographs and audio?

Relational database

Hierarchical database

Multidimensional database

Object-oriented database (correct)

Which database model uses a variation and extension of the relational model to include additional dimensions, sometimes called a data cube?

Network database

Hierarchical database

Relational database

Multidimensional database (correct)

In which type of processing does the data get collected over a period of time and the processing happens later all at one time?

Online processing

Immediate processing

Batch processing (correct)

Real-time processing

Which type of data includes facts or observations about people, places, things, and events?

Unstructured data Signup and view all the answers

What is the unique identifier also known as the primary key in databases?

Key field Signup and view all the answers

Which type of database is designed for representing complex relationships and includes additional dimensions like a data cube?

Multidimensional database Signup and view all the answers

What is the electronic system that allows data to be easily accessed, manipulated, and updated?

Database Signup and view all the answers

In which type of processing does the processing happen immediately during the transaction?

Real-time processing Signup and view all the answers

What type of databases are used for storing semi-structured and unstructured data?

NoSQL Databases Signup and view all the answers

Which type of databases is used for storing interconnected data, such as social networks and recommendation engines?

Graph Databases Signup and view all the answers

Where are individual databases typically stored?

On the user's hard-disk drive Signup and view all the answers

What do database administrators determine in their role?

Most efficient ways to organize and access a company’s data Signup and view all the answers

What do big data technologies and tools include?

Hadoop, Spark, and NoSQL databases Signup and view all the answers

Which type of data analytics focuses on describing the happenings over time?

Descriptive Analytics Signup and view all the answers

What does diagnostic analytics focus on?

Reason for the occurrence of any event Signup and view all the answers

What is the first step in the process of data analytics?

'Cleaning the data' Signup and view all the answers

What is the purpose of the ETL process?

To extract, transform, and load data into a data warehouse Signup and view all the answers

What is the role of data warehousing in business decision-making?

It provides a centralized repository of information for analytics and reporting Signup and view all the answers

What is the role of a data analyst in the ETL process?

Assess the quality of data and its sources Signup and view all the answers

What type of data can be used to determine the criteria for grouping the data?

Numerical or categorical data Signup and view all the answers

Which step comes first in the process of data analysis?

Determine the criteria for grouping the data Signup and view all the answers

What is the main purpose of effective data visualization?

To turn complex data into insights and communicate them effectively to stakeholders Signup and view all the answers

What are some challenges associated with data warehousing?

Cost, complexity, and data integration Signup and view all the answers

What does a centralized repository of information in data warehousing provide for business decision-making?

Support for analytics and reporting Signup and view all the answers

What is an important component of successful big data analytics in modern businesses?

Effective management and analysis of data Signup and view all the answers