Data Types and Sources: Foundation for Data Analytics

Question 1

Which of the following is a key characteristic of unstructured data?

Accepted Answer

Can include text, images, and videos

Answer

Has a predefined structure

Answer

Can be easily stored in a relational database

Question 2

Which data type is ideal for storing detailed accounts of individual customer purchases?

Accepted Answer

Transactional

Answer

Numerical

Answer

Categorical

Answer

Time-series

Question 3

Unstructured data is characterized by its:

Accepted Answer

Lack of predefined schema

Answer

Fixed schema and format

Answer

Hierarchical organization

Answer

Numeric values only

Question 4

Big data is known for its:

Accepted Answer

Large volume, variety, and velocity

Answer

Small size and structured format

Answer

Limited accessibility

Answer

High accuracy and precision

Question 5

Which data source is primarily used for collecting real-time data from physical environments?

Accepted Answer

Sensors and IoT devices

Answer

Online surveys

Answer

Social media platforms

Answer

Government records

Question 6

Which data collection method involves directly gathering data from individuals?

Accepted Answer

Surveys

Answer

Data scraping

Answer

API integration

Answer

Observational studies

Question 7

Why is data ethics important in data analytics?

Accepted Answer

To ensure responsible and unbiased use of data

Answer

To comply with legal regulations

Answer

To enhance data accuracy and reliability

Answer

To facilitate data sharing and collaboration

Question 8

Which factor is crucial for ensuring the reliability of data during collection?

Accepted Answer

Data collection method

Answer

Data analysis method

Answer

Data storage method

Answer

Data visualization method

Question 9

Which of the following accurately describes the defining attribute of unstructured data?

Accepted Answer

Lacks a structured format, making it more challenging to analyze and process

Answer

Organized in a tabular structure with defined columns and rows

Answer

Easily searchable and processed using standard data analysis tools

Answer

Derived from a single, consistent source and conforms to a predefined schema

Question 10

Which of the following is NOT a key dimension used to characterize big data?

Accepted Answer

Structure: Describes the level of organization and predefined format in the data

Answer

Volume: Refers to the immense size and quantity of data

Answer

Variety: Encompasses the diverse types and sources of data

Answer

Velocity: Represents the rate at which data is generated and processed

Question 11

Which data collection method involves actively soliciting information directly from individuals?

Accepted Answer

Surveys: Gather data through questionnaires or interviews

Answer

Web scraping: Extract data from websites and online platforms

Answer

Sensor data: Collect data from sensors and devices

Answer

Databases: Retrieve data from organized and structured repositories

Question 12

Which feature is **NOT** characteristic of structured data?

Accepted Answer

Comprehensible by humans without additional interpretation

Answer

Organized in a predefined format

Answer

Data elements have well-defined relationships

Answer

Easily stored and analyzed

Question 13

Which type of data encompasses vast datasets that necessitate specialized tools and techniques for analysis?

Accepted Answer

Big data

Answer

Structured data

Answer

Transactional data

Answer

Qualitative data

Question 14

What is the primary purpose of data cleansing in data analytics?

Accepted Answer

Remove inconsistencies and errors

Answer

Transform data into a usable format

Answer

Identify patterns and insights

Answer

Extract meaningful information

Question 15

Which data collection method involves utilizing sensors to gather data?

Accepted Answer

Sensor data collection

Answer

Web scraping

Answer

API integration

Answer

Surveys

Question 16

Which data type is most suitable for representing customer demographics?

Accepted Answer

Structured data

Answer

Unstructured data

Answer

Semi-structured data

Answer

Big data

Question 17

Which of the following is **not** a characteristic of structured data?

Accepted Answer

Free-form text and images

Answer

Organized in rows and columns

Answer

Easily stored and processed by computers

Answer

Predefined format and schema

Question 18

Which data type is often characterized by its large volume, velocity, and variety?

Accepted Answer

Big data

Answer

Structured data

Answer

Unstructured data

Answer

Semi-structured data

Question 19

Which of the following is a common source of unstructured data?

Accepted Answer

Social media posts

Answer

Financial records

Answer

Sales reports

Answer

Customer surveys

Question 20

Which data collection approach involves gathering data from previously existing sources?

Accepted Answer

Secondary data collection

Answer

Observational study

Answer

Experimental research

Answer

Sampling method

Question 21

Which data format features a hierarchical structure and can be represented in XML?

Accepted Answer

Semi-structured data

Answer

Relational data

Answer

Unstructured data

Answer

Big data

Question 22

Which technique is used to convert unstructured data into a structured format?

Accepted Answer

Natural language processing

Answer

Machine learning

Answer

Data visualization

Answer

Data mining

Question 23

Which benefit is **not** associated with using structured data?

Accepted Answer

Allows for free-form text and image data

Answer

Easy to analyze and interpret

Answer

Can be stored in relational databases

Answer

Provides insights into complex relationships

Question 24

Which of the following is NOT a widely recognized type of data used in data analytics?

Accepted Answer

Processed data

Answer

Structured data

Answer

Unstructured data

Answer

Big data

Question 25

Which of the following is a defining characteristic of unstructured data?

Accepted Answer

Lacks a predefined structure

Answer

Organized in a tabular format

Answer

Easily stored and analyzed

Answer

Directly derived from structured data sources

Question 26

Which data collection method involves gathering data from physical sensors and devices?

Accepted Answer

Internet of Things (IoT)

Answer

Surveys

Answer

Interviews

Answer

Web scraping

Question 27

Which of the following data sources is most likely to provide information about customer demographics?

Accepted Answer

Customer feedback surveys

Answer

Sales records

Answer

Web logs

Answer

Social media data

Question 28

Which of the following is NOT a characteristic of unstructured data?

Accepted Answer

Highly organized and follows a specific schema

Answer

Typically free-form text without predefined structure

Answer

Can be difficult to analyze due to its lack of structure

Answer

Includes examples like emails and social media posts

Question 29

What is the defining attribute of big data?

Accepted Answer

Massive size, volume, and variety that exceeds traditional data processing capabilities

Answer

Structured and organized format that facilitates analysis

Answer

Ease of accessibility and analysis with standard tools

Answer

Origin solely from traditional data sources like relational databases

Question 30

What is the fundamental difference between quantitative and qualitative data?

Accepted Answer

Quantitative data is numerical and measurable, while qualitative data is non-numerical and descriptive

Answer

Qualitative data is inherently more reliable than quantitative data

Answer

Quantitative data is always easier to collect and analyze than qualitative data

Answer

There is no meaningful distinction between quantitative and qualitative data

Question 31

What is the primary goal of data cleaning in the context of data analytics?

Accepted Answer

To identify and remove errors, inconsistencies, and duplicate data

Answer

To transform data into a format that is suitable for analysis

Answer

To reduce the size of the dataset and improve efficiency

Answer

To enhance the accuracy and reliability of data analysis

Question 32

Which of the following is a common technique used to visualize unstructured data, such as text or social media data?

Accepted Answer

Word clouds that provide a visual representation of frequently occurring words

Answer

Scatterplots that are used to visualize relationships between numerical variables

Answer

Bar charts that display data in the form of vertical bars

Answer

Pie charts that depict data as segments of a circle

Question 33

Which of the following is NOT a characteristic of structured data?

Accepted Answer

Contains free-form text

Answer

Organized in a tabular format

Answer

Conforms to a defined schema

Answer

Can be easily queried and analyzed

Question 34

Which of the following methods is commonly employed to gather data from sensors and IoT devices?

Accepted Answer

Streaming

Answer

Surveys

Answer

Data scraping

Answer

Interviews

Question 35

In data analytics, what is the primary objective of data cleaning?

Accepted Answer

Rectifying errors and inconsistencies

Answer

Removing duplicate data

Answer

Transforming data into a desired format

Answer

Visualizing data for analysis

Question 36

What distinguishes data mining from machine learning?

Accepted Answer

Data mining extracts insights from data, while machine learning builds predictive models

Answer

Machine learning extracts insights from data, while data mining builds predictive models

Answer

Data mining and machine learning are interchangeable concepts

Answer

There is no distinction between data mining and machine learning

Question 37

Which type of data is characterized by its lack of predefined structure or format?

Accepted Answer

Unstructured data

Answer

Structured data

Answer

Semi-structured data

Answer

Big data

Question 38

Which of the following data sources is primarily used to collect data from sensors, devices, and machines?

Accepted Answer

IoT devices

Answer

Surveys

Answer

Social media

Answer

Databases

Question 39

Which characteristic describes structured data?

Accepted Answer

Organized into a defined format with rows and columns

Answer

Not easily organized or classified

Answer

Very large and complex

Answer

Generated from social media platforms

Question 40

What is the key difference between qualitative and quantitative data?

Accepted Answer

Quantitative data is numeric; qualitative data is non-numeric

Answer

Qualitative data is numeric; quantitative data is non-numeric

Answer

Qualitative data is objective; quantitative data is subjective

Answer

Quantitative data is objective; qualitative data is subjective

Question 41

What primary advantage does big data offer in data analytics?

Accepted Answer

Enhanced accuracy and specificity of insights

Answer

Reduced data storage expenses

Answer

Accelerated data processing

Answer

Increased data protection

Question 42

Which challenge is commonly encountered during data integration?

Accepted Answer

Data quality concerns

Answer

Data security worries

Answer

Data privacy regulations

Answer

Shortage of skilled data experts

Question 43

What is the purpose of metadata in data management?

Accepted Answer

It provides information about the data, including its structure and definition

Answer

It helps safeguard data from unauthorized access

Answer

It boosts the efficiency of data processing

Answer

It ensures the data's accuracy

Question 44

Which data cleaning technique is used to eliminate duplicate entries?

Accepted Answer

Deduplication

Answer

Data normalization

Answer

Imputation

Answer

Data transformation

Question 45

What is the primary objective of data exploration?

Accepted Answer

To find patterns, trends, and outliers in the data

Answer

To develop predictive models

Answer

To make business decisions

Answer

To prepare data for analysis

Question 46

Which type of data comprises a fixed arrangement of organized information within defined fields?

Accepted Answer

Structured data

Answer

Semi-structured data

Answer

Unstructured data

Question 47

Which data source involves extracting data from internal systems and applications within an organization?

Accepted Answer

Operational data

Answer

External data

Answer

Crowdsourced data

Question 48

Which characteristic is inherent to unstructured data?

Accepted Answer

Absence of a predefined schema

Answer

Readily amenable to analysis

Answer

Relatively small in volume

Answer

Contains only numerical values

Question 49

Which data collection method directly gathers information from individuals?

Accepted Answer

Surveys

Answer

API integration

Answer

Web scraping

Answer

Data mining

Question 50

Which type of data is characterized by its immense volume and requires specialized processing techniques?

Accepted Answer

Big data

Answer

Qualitative data

Answer

Structured data

Answer

Unstructured data

Question 51

Which data source consists of data streams generated from various devices, IoT sensors, and social media platforms?

Accepted Answer

Real-time data

Answer

Historical data

Answer

Experimental data

Answer

Observational data

Question 52

Which advantage is associated with using structured data?

Accepted Answer

Facilitates efficient querying and analysis

Answer

Captures complex relationships effectively

Answer

Suitable for managing extremely large data volumes

Answer

Provides comprehensive insights

Question 53

Which data source involves gathering data from individuals' online browsing activities?

Accepted Answer

Web analytics

Answer

Observation

Answer

Surveys

Answer

Interviews

Question 54

Which challenge is commonly encountered when working with unstructured data?

Accepted Answer

Difficulties in integrating and analyzing the data

Answer

Relatively small data size

Answer

High degree of data accuracy

Answer

Lack of data variety