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All questions of Big Data Modelling and Analysis: Databases and Spreadsheets for Year 9 Exam
Each cell may contain .......- a) numbers and text and formulae at the same time
- b) numbers and text at the same time
- c) numbers only
- d) numbers or text or formulae
Correct answer is option 'D'. Can you explain this answer?
a)
numbers and text and formulae at the same time
b)
numbers and text at the same time
c)
numbers only
d)
numbers or text or formulae
|
Torcia Education answered |
Each cell should only contain one type of data at a time
Which database management system is commonly used for big data analytics?- a)SQLite
- b)MySQL
- c)Hadoop
- d)PostgreSQL
Correct answer is option 'C'. Can you explain this answer?
a)
SQLite
b)
MySQL
c)
Hadoop
d)
PostgreSQL
|
|
Torcia Education answered |
Hadoop is a popular database management system used for big data analytics due to its ability to handle large datasets and perform distributed processing.
The work space is divided into rectangles called .......- a) bells
- b) cells
- c) sells
- d) shells
Correct answer is option 'B'. Can you explain this answer?
a)
bells
b)
cells
c)
sells
d)
shells
|
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Torcia Education answered |
The size of the cell can be adjusted to suit the contents
What is the purpose of using formulas in spreadsheet cells?- a)To store text and numerical data
- b)To perform calculations and logical operations
- c)To format the appearance of cells
- d)To create charts and graphs
Correct answer is option 'B'. Can you explain this answer?
What is the purpose of using formulas in spreadsheet cells?
a)
To store text and numerical data
b)
To perform calculations and logical operations
c)
To format the appearance of cells
d)
To create charts and graphs
|
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Torcia Education answered |
Formulas allow users to perform mathematical calculations, apply logical functions, and manipulate data within spreadsheet cells.
Spreadsheets are applications designed to .......- a) do the same job as databases only they are cheaper
- b) give you a large desktop to work on
- c) help accountants
- d) perform calculations on data in a convenient way
Correct answer is option 'D'. Can you explain this answer?
a)
do the same job as databases only they are cheaper
b)
give you a large desktop to work on
c)
help accountants
d)
perform calculations on data in a convenient way
|
|
Torcia Education answered |
You can use your mouse to select a cell on the screen
What do we call a cell being worked on?- a) Active cell
- b) Calc cell
- c) Current cell
- d) Live cell
Correct answer is option 'A'. Can you explain this answer?
a)
Active cell
b)
Calc cell
c)
Current cell
d)
Live cell
|
|
Torcia Education answered |
You can only type text, symbols and numbers into one cell at a time
Cells are organised in rows and .......- a) boxes
- b) columns
- c) layers
- d) shelves
Correct answer is option 'B'. Can you explain this answer?
a)
boxes
b)
columns
c)
layers
d)
shelves
|
|
Torcia Education answered |
This helps to keep your spreadsheet model organised and easier to follow
What is the purpose of using databases for data management in big data?- a)To increase the speed of internet connections
- b)To organize, store, and retrieve large amounts of data efficiently
- c)To reduce the need for data analysis
- d)To simplify software development
Correct answer is option 'B'. Can you explain this answer?
a)
To increase the speed of internet connections
b)
To organize, store, and retrieve large amounts of data efficiently
c)
To reduce the need for data analysis
d)
To simplify software development
|
|
Torcia Education answered |
The purpose of using databases for data management in big data is to organize, store, and retrieve large amounts of data efficiently, enabling effective data analysis and decision-making.
What is one characteristic of big data that differentiates it from traditional data?- a)Limited variety
- b)High volume
- c)Low velocity
- d)Minimal value
Correct answer is option 'B'. Can you explain this answer?
a)
Limited variety
b)
High volume
c)
Low velocity
d)
Minimal value
|
|
Torcia Education answered |
Big data is characterized by its high volume, which refers to the large amount of data generated and stored.
In data modeling, what is a primary key?- a)A key used to encrypt data
- b)A unique identifier for a record in a table
- c)A tool for visualizing data
- d)A method for sorting data
Correct answer is option 'B'. Can you explain this answer?
a)
A key used to encrypt data
b)
A unique identifier for a record in a table
c)
A tool for visualizing data
d)
A method for sorting data
|
|
Torcia Education answered |
A primary key is a unique identifier for a record in a table, ensuring that each record can be uniquely identified.
What feature of spreadsheets allows users to modify the size of cells based on their contents?- a)Cell expansion
- b)Cell adjustment
- c)Cell resizing
- d)Cell formatting
Correct answer is option 'C'. Can you explain this answer?
What feature of spreadsheets allows users to modify the size of cells based on their contents?
a)
Cell expansion
b)
Cell adjustment
c)
Cell resizing
d)
Cell formatting
|
|
Torcia Education answered |
Users can adjust the size of cells in a spreadsheet to accommodate varying amounts of data, ensuring clear and organized presentation of information.
Typical uses of spreadsheets would not include .......- a) creating invoices
- b) doing basic calculations on a few numbers
- c) producing charts and graphs
- d) simple databases
Correct answer is option 'B'. Can you explain this answer?
a)
creating invoices
b)
doing basic calculations on a few numbers
c)
producing charts and graphs
d)
simple databases
|
|
Torcia Education answered |
Mental arithmetic or using a calculator would be faster
Which of the following is a common technique used in data modeling?- a)Pie chart analysis
- b)Entity-Relationship (ER) modeling
- c)Line graph plotting
- d)Time series analysis
Correct answer is option 'B'. Can you explain this answer?
a)
Pie chart analysis
b)
Entity-Relationship (ER) modeling
c)
Line graph plotting
d)
Time series analysis
|
|
Torcia Education answered |
Entity-Relationship (ER) modeling is a common technique used to create a conceptual framework for data modeling by defining the entities and their relationships.
How does a relational database store data?- a)In a hierarchical structure
- b)In tables with rows and columns
- c)In unstructured text files
- d)In a flat file format
Correct answer is option 'B'. Can you explain this answer?
a)
In a hierarchical structure
b)
In tables with rows and columns
c)
In unstructured text files
d)
In a flat file format
|
|
Torcia Education answered |
A relational database stores data in tables with rows and columns, allowing for organized storage and easy retrieval of data.
Which data modeling technique involves creating a graphical representation of data and its relationships?- a)Normalization
- b)Data mining
- c)ER diagram
- d)Data warehousing
Correct answer is option 'C'. Can you explain this answer?
a)
Normalization
b)
Data mining
c)
ER diagram
d)
Data warehousing
|
|
Torcia Education answered |
An ER (Entity-Relationship) diagram is a graphical representation of data and its relationships, used in data modeling to visualize the structure of the database.
Which of the following is an example of a NoSQL database commonly used in big data applications?- a)Oracle
- b)MongoDB
- c)Microsoft Access
- d)Excel
Correct answer is option 'B'. Can you explain this answer?
a)
Oracle
b)
MongoDB
c)
Microsoft Access
d)
Excel
|
|
Torcia Education answered |
MongoDB is a NoSQL database commonly used in big data applications for its flexibility in handling unstructured data.
How are rows and columns organized in a spreadsheet?- a)Rows are vertical, and columns are horizontal
- b)Rows are horizontal, and columns are vertical
- c)Rows and columns are both vertical
- d)Rows and columns are both horizontal
Correct answer is option 'B'. Can you explain this answer?
How are rows and columns organized in a spreadsheet?
a)
Rows are vertical, and columns are horizontal
b)
Rows are horizontal, and columns are vertical
c)
Rows and columns are both vertical
d)
Rows and columns are both horizontal
|
|
Torcia Education answered |
This organization helps in structuring data effectively and makes it easier to manage and analyze information in a spreadsheet.
What does the 'velocity' aspect of big data refer to?- a)The speed at which data is generated and processed
- b)The variety of data sources
- c)The accuracy of data
- d)The volume of data
Correct answer is option 'A'. Can you explain this answer?
a)
The speed at which data is generated and processed
b)
The variety of data sources
c)
The accuracy of data
d)
The volume of data
|
|
Torcia Education answered |
The 'velocity' aspect of big data refers to the speed at which data is generated, processed, and analyzed in real-time or near real-time.
What is data normalization in the context of data modeling?- a)Increasing data redundancy
- b)Reducing data redundancy and improving data integrity
- c)Converting data into binary format
- d)Visualizing data through graphs
Correct answer is option 'B'. Can you explain this answer?
a)
Increasing data redundancy
b)
Reducing data redundancy and improving data integrity
c)
Converting data into binary format
d)
Visualizing data through graphs
|
|
Torcia Education answered |
Data normalization is the process of reducing data redundancy and improving data integrity by organizing data into related tables and ensuring that dependencies are properly enforced.
Chapter doubts & questions for Big Data Modelling and Analysis: Databases and Spreadsheets - Year 9 Computing (Cambridge) 2025 is part of Year 9 exam preparation. The chapters have been prepared according to the Year 9 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Year 9 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
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