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Questions and Answers
Which SQL command is part of DDL?
Which SQL command is part of DDL?
The function POWER(x, y) returns x raised to the power of y.
The function POWER(x, y) returns x raised to the power of y.
True
What does the function LENGTH() return?
What does the function LENGTH() return?
The length of a string
The ______ function is used to find the position of a substring.
The ______ function is used to find the position of a substring.
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Match the following SQL functions with their descriptions:
Match the following SQL functions with their descriptions:
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Which function would you use to extract just the date from a datetime value?
Which function would you use to extract just the date from a datetime value?
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The function ROUND(x, d) rounds x to d decimal places.
The function ROUND(x, d) rounds x to d decimal places.
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What does the SQL command 'DROP' do?
What does the SQL command 'DROP' do?
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What is the main purpose of the Pandas library in Python?
What is the main purpose of the Pandas library in Python?
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A DataFrame in Pandas is a one-dimensional labeled array.
A DataFrame in Pandas is a one-dimensional labeled array.
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What function would you use to display the first few elements of a Pandas Series?
What function would you use to display the first few elements of a Pandas Series?
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To create a Pandas Series from a dictionary, use the command pd.Series({___})
.
To create a Pandas Series from a dictionary, use the command pd.Series({___})
.
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Match the following Pandas operations with their descriptions:
Match the following Pandas operations with their descriptions:
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Which of the following methods can be used to read a CSV file into a DataFrame?
Which of the following methods can be used to read a CSV file into a DataFrame?
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A bar graph is created using the function plt.hist(x, y).
A bar graph is created using the function plt.hist(x, y).
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What is the command used to save a plot as a PNG file in Matplotlib?
What is the command used to save a plot as a PNG file in Matplotlib?
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Which of the following is an example of Free and Open Source Software (FOSS)?
Which of the following is an example of Free and Open Source Software (FOSS)?
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Copyright provides legal protection against unauthorized use of a creator's work.
Copyright provides legal protection against unauthorized use of a creator's work.
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What are the key features of the Indian IT Act, 2000?
What are the key features of the Indian IT Act, 2000?
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Disposing of electronic devices in an environmentally safe manner is part of e-waste __________.
Disposing of electronic devices in an environmentally safe manner is part of e-waste __________.
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Match the following types of cyber threats with their descriptions:
Match the following types of cyber threats with their descriptions:
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What is the primary function of an Equi-Join in databases?
What is the primary function of an Equi-Join in databases?
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A LAN (Local Area Network) can cover multiple towns.
A LAN (Local Area Network) can cover multiple towns.
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What device is used to convert digital data to analog for transmission?
What device is used to convert digital data to analog for transmission?
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A __________ connects different networks and routes data between them.
A __________ connects different networks and routes data between them.
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Match the following network topologies with their characteristics:
Match the following network topologies with their characteristics:
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Which of the following defines a PAN (Personal Area Network)?
Which of the following defines a PAN (Personal Area Network)?
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The World Wide Web is synonymous with the Internet.
The World Wide Web is synonymous with the Internet.
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What does VoIP stand for?
What does VoIP stand for?
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What defines a website?
What defines a website?
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Dynamic webpages have fixed content.
Dynamic webpages have fixed content.
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Name two types of digital footprints.
Name two types of digital footprints.
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A ______ is used to access information on the web.
A ______ is used to access information on the web.
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Match the following concepts with their definitions:
Match the following concepts with their definitions:
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Which of the following methods can help protect data?
Which of the following methods can help protect data?
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Net and Communication Etiquettes encourage spamming.
Net and Communication Etiquettes encourage spamming.
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What can lead to legal consequences and loss of credibility?
What can lead to legal consequences and loss of credibility?
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Study Notes
Unit 1: Data Handling using Pandas - I
- Pandas is a Python library for data manipulation and analysis.
- Matplotlib is a library for creating visualizations.
- Series is a one-dimensional labeled array for holding data of any type.
- DataFrame is a two-dimensional, mutable, heterogeneous tabular data structure.
- Series creation methods include from ndarrays, dictionaries, and scalar values.
- Series operations include mathematical operations like addition, subtraction, multiplication.
- Functions like
head()
display initial elements, andtail()
displays the last few. - Series data can be selected, indexed, and sliced.
- DataFrame creation includes from dictionaries of series or lists of dictionaries.
- DataFrame operations include adding, selecting, deleting columns/rows.
- DataFrames can be indexed using labels (
df.loc[]
) or boolean indexing (df[df['col'] > value]
). - Data can be imported from and exported to CSV files, using
pd.read_csv()
anddf.to_csv()
. Exporting should typically exclude row indexes (e.g.,index=False
).
Unit 2: Database Query using SQL
- Databases are structured collections of data.
- SQL is used to interact with databases.
- SQL commands include DDL (CREATE, ALTER, DROP) and DML (SELECT, INSERT, UPDATE, DELETE) with other elements of transaction control language.
- Mathematical functions in SQL include
POWER
,ROUND
, andMOD
. - Text functions include
UCASE
/UPPER
,LCASE
/LOWER
,MID
/SUBSTRING
/SUBSTR
,LENGTH
,LEFT
,RIGHT
, andINSTR
. - Date functions include
NOW
,DATE
,MONTH
,MONTHNAME
,YEAR
,DAY
, andDAYNAME
. - Aggregate functions include
MAX
,MIN
,AVG
,SUM
, andCOUNT
. -
GROUP BY
groups rows with shared properties. -
HAVING
filters groups of data. -
ORDER BY
sorts the results.
Unit 3: Introduction to Computer Networks
- Networks connect devices for resource sharing and communication.
- Network types include PAN (Personal Area), LAN (Local Area), MAN (Metropolitan Area), and WAN (Wide Area).
- Key network devices include modems, hubs, switches, repeaters, routers, and gateways.
- Common network topologies include bus, tree, and mesh topologies.
- The internet is a global network of interconnected networks.
- URL is a web resource locator and WWW is a system of interconnected hypertext documents.
- Internet applications include web browsing, email, chat, and VoIP.
Unit 4: Societal Impacts
- Digital footprint is the trail of data left by internet users. This includes activities like social media posts, search history, and cookies.
- Digital footprint types include active (intentionally shared info) and passive (data collected without user awareness).
- Net etiquette guidelines concern respectful communication online.
- Data protection involves methods to safeguard data from unauthorised access.
- Intellectual Property Rights (IPR) secures creations (inventions, art, designs). Rights include patents, copyright, and trademarks.
- Plagiarism is using someone else's work without proper acknowledgement.
- Licensing and copyright involve legal protections and permissions to use copyrighted content.
Unit 7: Free and Open Source Software (FOSS)
- FOSS (Free and Open Source Software) is freely modifiable and distributed software.
- Examples include Linux, Apache, and LibreOffice.
- Benefits include cost-effectiveness, collaboration, and no vendor lock-in.
Unit 8: Cybercrime and Cyber Laws
- Cybercrime refers to illegal activities involving computers and the internet (e.g., hacking, phishing, identity theft).
- Indian Cyber laws are governed by the Indian IT Act, 2000. Key aspects include digital signature recognition, cybercrime prevention, and penal provisions.
Unit 9: Types of Cyber Threats
- Hacking is gaining unauthorised access to a system.
- Phishing is fraudulent attempts to steal sensitive information through fake emails/websites.
- Cyber bullying is harassment using digital platforms.
Unit 10: E-Waste
- E-waste refers to discarded electronic devices, harmful due to toxic components.
- Effective management includes recycling, refurbishing, and safe disposal.
Unit 11: Health Concerns Related to Technology Usage
- Excessive technology use can cause physical (e.g., eye strain, carpal tunnel) and mental issues (e.g., stress, social isolation).
- Solutions exist to mitigate these concerns (e.g., ergonomic equipment, 20-20-20 rule).
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Description
This quiz covers the basics of data handling using the Pandas library in Python. It includes topics like Series and DataFrame creation, manipulation, and key functions for data analysis and visualization. Prepare to test your understanding of core concepts and operations involved in data manipulation.