Class 8th Chapter -6 Computer (Introduction to Data Science)

 Chapter 6: Introduction to Data Science

Checkpoint (Pg.110)

Fill in the blanks.

1. outcomes

2. data collection

3. experiences

4. trends

5. Quantitative

Exercises (Pg. 113-115)

A. Tick (✓) the correct answers.

1. b

2. b

3. b

4. a

5. b

B. Fill in the blanks.

1. data cleaning

2. Qualitative data

3. data visualisation

4. Modelling

5. Optimisation and deployment

C. Write T for True and F for False.

1. T

2. T

3. T

4. T

5. F

A. Answer the following questions in short.

Q.1    How many types of  data are in data science? 

Ans:-     Data can be classified into two types :- qualitative data and quantitative data. 

Q.2    Who coined the term "Data Science"? 

Ans:-     Peter Naur in 1974.

Q.3    Who laid the foundation of data analysis in 1962?

Ans:-      John Tukey.

Q.4  What is a common tool used in data science today? 

Ans:-    Python

B. Answer the following questions in long.

Q.1    What is Data Science and how does it contribute to decision making ?

Ans:- Data science is the field that focuses on collecting  mathematics, statistics, and computer science to collect and analyse data, uncover insights, and predict trends. It empowers industries to solve problems, optimise operations, and make smarter decisions through machine learning, AI, and big data technologies.

Q.2    Describe the key stages in the data science process. 

The data science process includes six key stages: problem identification, data collection, cleaning, exploration, modeling, and deployment. It begins by defining the problem and gathering relevant data. After cleaning and analyzing patterns, predictive models are built and optimized. Finally, the model is deployed to make informed decisions, such as identifying customer churn and enabling proactive retention strategies.

Q.3    List Five uses of Data Science ? 

Ans:-    Data science is used across a wide range of fields, from business and healthcare to sports and entertainment. Here are some of the most important applications of data science:

• Healthcare: In healthcare, data science is used to analyse patient records, predict disease outbreaks, and even develop personalised treatment plans based on a patient’s medical history. 

• Finance: Financial institutions use data science to analyse market trends, assess risks, and detect fraud. 

• E-commerce: Online stores like Amazon use data science to recommend products to customers, track purchasing behaviour, and optimise pricing.

• Sports: Teams use data science to analyse player performance, predict the outcome of games, and develop strategies. 

Q.4 Write three advantages and disadvantages of data science . 

Ans:-   Advantages of Data Science

• Data science provides insights that help individuals and businesses make more informed decisions.

• Data science allows for the automation of repetitive tasks, which increases efficiency and reduces human error.

• Data science can forecast future trends, giving businesses a competitive advantage by helping them prepare for future events.

Disadvantages of Data Science

• The collection and analysis of large amounts of personal data raises concerns about privacy and security.

• If the data used for analysis is biased or unrepresentative, the conclusions drawn from it can be incorrect or misleading.

• Implementing data science projects can be expensive due to the need for specialised tools, software, and experts.    

Class- 6 Chapter 9( Internet and Netiquette)

 Chapter 9: Internet and Netiquette

Checkpoint (Pg. 134)

Fill in the blanks.

1. telephone

2. broadband

3. Wi-Fi

4. Dongle

5. Generation

Checkpoint (Pg. 139)

Write T for True and F for False.

1. T

2. F

3. F

4. F

5. T

Exercises (Pgs. 140-142)

A. Tick (✓) the correct answers.

1. a

2. b

3. a

4. a

5. a

B. Fill in the blanks.

1. Bandwidth

2. Google Drive

3. Report Abuse

4. footprint

5. password

C. Write T for True and F for False.

1. T

2. F

3. T

4. T

5. F

A.    Answer the following questions in short.

Q.1 What do you understand by Copyright laws ?

Ans:- Copyright laws protect intellectual property ,ensuring that creators receive credit for their work and prevent unauthorised use.

Q.2    What is a Google drive? 

Ans:-    Google Drive is a cloud computing service that allows users to create , store and share documents , spreadsheets, presentation and applications.

Q.3    When was Wifi developed ? 

Ans:-    Wi-fi was originally developed in the 1990s for transmitting data between device wirelessly. 

Q.4    Who use "@" symbol in Email id for first time ? 

Ans:-    Ray Tomlinson in the 1970. 

D. Answer the following questions.

Q.1  What is the Internet ? How has it transformed our daily lives?

Ans:- The Internet is the world’s largest computer network, connecting millions of computers worldwide. This network is created using telephone wires, cables, dongles, Wi-Fi, satellites, and more. The Internet helps people communicate easily, regardless of geographical distance. 

Q.2  Describe the diverse types of internet connections available today?

Ans:-   Dial-up:-Dial-up connects to the Internet using a telephone line by dialling the ISP’s number. It offers slow data speeds.

Broadband:-Broadband is a high-speed Internet connection with wide bandwidth, allowing fast data transfer for streaming, downloading, and online activities.

Q.3 Define netiquette . What are some key rules to create a respectful online environment?

Ans:- The term netiquette refers to a set of manners or communication etiquette that all Internet users should follow. It is a combination of the words ‘net’, which stands for the Internet, and ‘etiquette’, meaning manners or rules. Understanding netiquette is essential for creating a respectful online environment.

Rule for internet :- 

• Use unique passwords for your accounts to keep them secure.

• Take breaks from screens to enjoy other activities.

• Do not share your passwords with anyone.

Q.4 List two safety measures to safeguard personal information online?

Ans:- It is crucial to follow safety tips for a positive online experience:

• Do not share your full name, address, phone number, or school name with people you do not know.

• Never share the password of your online account with anyone to keep your information safe.

Q.5  What does digital footprint mean? 

Ans:-  A digital footprint refers to the trail of data and information that a person leaves behind while using the internet. This includes things like social media activity, websites visited, online purchases, comments posted, and any other digital interactions. 

Activity Hub (Pg. 143)

A. What am I?

1. The Internet

2. Dial-up

3. Copyright

4. Digital footprint

B. Tick (✓) the responsible behaviour.

1. b

2. c

3. b

4. b

Class- 6 Chpater-8 (Artificial Intelligence)

 Chapter 8: Artificial Intelligence

Checkpoint (Pg. 123)

Write T for True and F for False.

1. T

2. F

3. T

Exercises (Pgs. 127-129)

A. Tick (✓) the correct answers.

1. b

2. b

3. b

4. b

5. b

B. Fill in the blanks.

1. John McCarthy

2. 1950s

3. Computer Vision

4. Natural Language Processing

5. privacy

C. Write T for True and F for False.

1. T

2. T

3. F

4. F

5. T

A. Answer the following questions in short.

Q.1    Who developed Artificial Intelligence ? 

Ans:-    Alan  Turing and John McCarthy .

Q.2    What is Theory of mind ? 

Ans :-    Researchers and currently working on the text level of AI known as the Theory of Mind.

Q.3     Name any two AI Chat bots ? 

Ans:-    ChatGPT and Copilot

Q.4    What is the full form of AI ? 

Ans:-    Artificial Intelligence      

 

B. Answer the following questions in long.

Q.1    What is artificial intelligence?

Ans :- Artificial Intelligence (AI) is the ability of a machine to perceive and understand its surroundings and make decisions to achieve specific goals. It is a type of technology that focuses on creating machines that can learn and act intelligently.

Q.2 Explain  the  different  types  of  AI  based  on  functionalities?

Ans:- Artificial intelligence can be categorised into four types based on functionality:

1.    Reactive Machines – Basic AI that reacts to inputs without memory or learning.

2.    Limited Memory – Learns from past data to make better decisions (e.g., self-driving cars).

3.    Theory of Mind – Future AI that understands human emotions and intentions.

4.    Self-aware AI – Hypothetical AI with consciousness and independent thinking.

Q.3    Describe the domains of   AI?

Ans:- The three primary domains of AI are as follows:

• Machine Learning: It enables systems to learn from data, identify patterns, and make decisions with minimal human intervention.

• Natural Language Processing (NLP): This allows machines to understand, interpret, and respond using human language. It powers tools like chatbots, translators, and voice assistants.

• Computer Vision: It helps machines analyze and understand visual content such as images and videos. Applications include facial recognition, medical imaging, and autonomous vehicles.

Q.4    How do you think artificial intelligence will change our lives in the future?

Ans :-    Ans:- Artificial Intelligence will reshape our future by improving healthcare, education, and transport. It enables faster decisions, personalised learning, and efficient systems. AI can also help solve global issues like climate change by analysing data for better solutions. Overall, it promises a smarter, more adaptive, and time-saving world.

Q.5  Why do you think ethics are important when using AI?   

Ans:- As AI advances, it's crucial to address ethics by ensuring fairness, privacy, and safety. Transparency builds trust, while job changes call for new skills. Sustainable practices are needed to reduce environmental impact. Responsible AI should balance innovation with human values to benefit society.

World History- GK Event -19

  Session-4    (2025-2026)

GK Event -19         

Note :- Do not write Hindi in notebook . 

                 विश्व इतिहास (World History) 

Q.1    Who discovered America?

            (अमेरिका की खोज किसने की थी?

Ans:-    क्रिस्टोफर कोलंबस (Christopher Columbus)  in 1492

Q.2     In which country did the Industrial Revolution first begin?

            (औद्योगिक क्रांति (Industrial Revolution) सबसे पहले किस देश में शुरू हुई थी?)

Ans:-    इंग्लैंड (England)

Q.3     When did the Second World War begin?

            (दूसरा विश्व युद्ध कब शुरू हुआ था?)

 Ans:-     September 1, 1939

Q.4       The Cold War was fought between which two superpowers? 

                (“शीत युद्ध” (Cold War) किन दो महाशक्तियों के बीच हुआ था?)

 Ans:-    अमेरिका (USA) और सोवियत संघ (USSR)

Q.5       Who led the Russian Revolution of 1917?

            ( रूस में 1917 की क्रांति का नेतृत्व किसने किया था?)

Ans:-     व्लादिमीर लेनिन (Vladimir Lenin)

Q.6        Who was known as the “Sun King” of France?

            (फ्रांस का “सूर्य राजा” किसे कहा जाता था?

Ans:-     लुई चौदहवें (Louis XIV)

Q.7       Who discovered the sea route to India in 1498? 

            (भारत के समुद्री मार्ग की खोज किसने की थी?)

Ans:-   Vasco da Gama

Q.8    Nelson Mandela became the first black President of which country?

            (नेल्सन मंडेला किस देश के पहले अश्वेत राष्ट्रपति बने?)

Ans:-     दक्षिण अफ्रीका (South Africa) – 1994

Q.9      Which ancient civilization built the pyramids?

             (पिरामिड किस प्राचीन सभ्यता ने बनाए थे?)

Ans:-     The Egyptians(मिस्र की सभ्यता)

Q.10        The American Civil War was mainly fought on which issue?

                (अमेरिका का गृह युद्ध (Civil War) मुख्यतः किस मुद्दे पर लड़ा गया था?)

Ans:-     दासप्रथा (Slavery)

Q.11     Who was the leader of Nazi Germany during World War II? 

            (द्वितीय विश्व युद्ध के दौरान नाजी जर्मनी का नेता कौन था?)

Ans:-    Adolf Hitler   

Current Affairs 7 October 2025

Current Affairs 7 October 2025           

Q.1         Who is the new captain of the Indian ODI team 2025?

Ans :-   Shubman Gill 

Q.2        Who launched the 'Your Capital, Your Rights' campaign? 

Ans:-    Nirmala Sitharaman 

Q.3        Who topped the Hurun Rich List 2025?

Ans:-    Mukesh Ambani 

Q.4         What is the valuation of OpenAI company? 

Ans:-    $500 billion.

Q.5        When is World Animal Day celebrated? 

Ans:-    4 October 

Q.6        What system has Maharashtra launched for import-export? 

Ans:-     E-bond system.

Q.7     Who launched NIELIT Digital University? 

Ans:-    Ashwini Vaishnav

Q.8     Where is the world's highest bridge? 

Ans:-    China

Q.9     Who received the Tamil Nadu Scientist Award?

Ans:-    Dr. R. Arthur James  

Q.10     Where will India's first private helicopter assembly line be set up?

Ans:-    Karnataka 

Q.11    Who is MD and CEO of Union Bank of India?

Ans:-    Ashish Pandey 

Q.12    Who is the brand ambassador of Asian Table Tennis Championship 2025? 

Ans:-    Sharath Kamal 

Q.13    Which is India's first child marriage-free district? 

Ans:-    Balod (Chhattisgarh) 

Q.14    Where was 'What was the 'Drone Kavach' exercise held in? 

Ans:-   Arunachal Pradesh 

Q.15    Who wrote the book 'Wings of Valor'?

Ans:-    Swapnil Pandey

Q.16    Who is the first person with a net worth of $500 billion? 

Ans:-    Elon Musk .

Q.17    What did India and China agree to start? 

Ans:-    Direct air services 

Q.18    How many new visit visa categories did UAE introduce?

Ans:-    Four 

Q.19    Who launched the My Bharat mobile app? 

Ans:-    Dr. Mansukh Mandaviya

Class -7th Chapter 6( Introduction to Python)

 Chapter 6: Introduction to Python

Checkpoint (Pg. 99)

Fill in the blanks.

1. Guido van Rossum

2. interpreted

3. portable

4. interpreter, compiler

Exercises (Pgs. 113-115)

A. Tick (✓) the correct answers.

1. b

2. b

3. b

4. c

5. b

B. Fill in the blanks.

1. number

2. line by line

3. Script

4. editor

5. assignment

C. Write T for True and F for False.

1. F

2. T

3. F

4. T

5. T

A.    Answer the following questions in short.

Q.1    What is Python? 

Ans:-    Python is a simple programming language used to create games, apps, and websites.

Q.2    What is a variable? 

Ans:-    A variable stores data like numbers or text, which can change during program execution.

Q.3     What is a string? 

Ans:-  A string is a group of characters written inside quotes, like "Hello" . 

Q.4    What is an integer? 

Ans:-    An integer is a whole number without decimals, like 1, 10, or 100.

B.     Answer the following questions in long.

Q.1    What is the role of an interpreter in Python ?

Ans:-  An interpreter reads and executes a program line by line. It translates each statement into machine code as the program runs. This means that when you are writing a program in Python, the interpreter immediately processes each instruction one at a time and executes it. If there is an error in the code, the interpreter stops and shows you where the problem is. This makes it easier to find and fix mistakes as you go along.

Q.2    What are the key difference between Python's interactive mode and script mode ? 

Ans:-     Python has two main modes in which you can write and run your code:

Interactive Mode:- In this mode, Python processes each command or statement as soon as you press the Enter key. It is great for testing small pieces of code and getting immediate results.

Script Mode:- This is used for writing larger programs. A Python script is a collection of commands saved in a file. Once you have written your entire program, you can run it all at once as a single unit.

Q.3    What are the common data types in Python ? 

Ans:-     In Python, you can use the following basic data types:

Numeric Data Types: These types are used to represent numbers. Python supports two main types of numeric data:

• Integer (int): This data type stores whole numbers. The range of integer values is large, from -2,147,483,648 to 2,147,483,647.

• Floating-point (float): This data type stores decimal numbers, or numbers with a fractional part.

Boolean (bool): This data type is used to represent logical values. It can hold one of two values: True or False. In Python, 1 represents True and 0 represents False.

String (str): A string is a sequence of characters enclosed in either single quotes (‘) or double quotes (“). Strings are used to represent text.

Q.4    What is the purpose of the print() function in Python ? 

Ans:-     The print( ) function in Python is used to display messages, values, or results of commands on the screen. It is a commonly used function especially when you want to show the output of a program.

Q.5    What is a variable in Python , and how is it used ? 

Ans:- In Python, a variable is a named storage that holds data for use in a program. It acts like a container for values such as numbers or text. Variables are assigned using the = operator, and each can store only one value at a time, which updates when reassigned.

 Python Programs 

1. Add Two Numbers

num1 = 1

num2 = 6

sum = num1 + num2

print('The sum of two number is ', sum)

2. Add the Numbers with User Input

num1 = input('Enter first number')

num2 = input('Enter second number')

Sum = float(num1) + float(num2)

print('the sum of two number is', sum)

3 . Checking Even or Odd Number

num = int(input("Enter a number"))

if num % 2 == 0 :

        print("The number is even")

else :

       print("The number is odd")

4. Checking Age

age = int(input("Enter your age"))

if age >= 18 :

        print("You are an adult")

else :

        print("You are not an adult")

5. Checking Temperature

temperature = int(input("Enter the temperature"))

if temperature > 30 :

        print("It's a hot day")

else :

        print("It's a cool day")

6. Find single or double digit number in python by user input.

a = int(input("Enter your number"))

if (a < 9) :

        print("this is single digit number")

else :

        print("this is double digit number")

Output

Enter your number - 2

This is single digit number

7.    Print your name and class

print ("Ayushi Bharti")

print ("class-7")

Output

Ayushi Bharti

class-7

8.    Add Two Strings

fname = "Ayushi"

sname = "Bharti"

Tname = fname + " " + sname

print (Tname)

Output

Ayushi Bharti

9.    Print any string in Uppercase by user Input.

text = input ("Enter a string: ")

print ("Uppercase: ", text.upper())

Output

Enter a string: ayushi

AYUSHI

10.    Print any string in lowercase by user Input.

text = input("Enter a string :")

print("lowercase :",text.lower())

Output

Enter a string : AYUSHI

ayushi

11.    Make a grading system using python program.

Marks = Int(input("enter your marks"))

if (Marks >= 90):

    print("Grade A+")

elif (Marks >= 75):

    print("Grade A")

elif (Marks >= 60):

    print("Grade B")

elif (Marks >= 40):

    print("Grade C")

else:

    print("fail")

Output

Enter your marks 90

Grade A+

Multiply a string by user input

a = input("Enter your name")

z = a * 2

print(z)

Output

Enter your name Ayushi

AyushiAyushiAyushi