The Introduction to Data Science Class 9 NCERT Solutions Chapter 1, provide simple and clear answers to all the questions given in the NCERT textbook. These solutions help students understand the basics of data science, including concepts like data collection, data organization, and interpretation.
Introduction to Data Science Class 9 NCERT Solutions
1) Data and information are the same.
a) Yes
b) No
2) Social media platforms are responsible for creating data footprints.
a) Yes
b) No
3) There is no risk of losing data.
a) Yes
b) No
4) Websites and mobile apps use our search history to provide personalized offers.
a) Yes
b) No
5) Which of the following is not in the DIKW model?
a) Data
b) Information
c) Security
d) Knowledge
6) Should you keep a data recovery plan?
a) Yes
b) No
7) What is your data footprint?
a) The data trail left by you when you surf the internet
b) The time you spend on your computer
c) The number of electronics you buy in a year
d) The number of apps you have on your mobile
8) How long is your data footprint visible?
a) It depends on the websites you visit.
b) The data footprint wipes clean after a year.
c) It creates a permanent record.
d) The record expires after a month.
9) Who can use or see data from your data footprint?
a) It is visible to professionals, but they need special access to go through the data.
b) No one can access data from your digital footprint.
c) Only the police have access to the information on your data footprint.
d) Your data footprint is potentially visible to anyone.
10) You regret posting a particular picture and want to take it down. Is it possible, and how would you do that?
a) It is a little tricky but can be done by asking a professional to do it. Then no one can see the photo.
b) You can delete the picture by clicking on the delete button. Then no one can see the photo anymore.
c) Only the police can delete a picture uploaded by you.
d) A photo can be deleted from your account, but someone might have already saved it or copied it.
11) How can you improve your data footprint?
a) It is best not to post anything if you want to stay safe.
b) It is not necessary to improve your data footprint.
c) Check your social media accounts’ privacy settings to make sure you share your posts with people you trust and know.
d) Share your personal details with a good friend or family member so they can help you stay safe online.
Standard Questions
1) Explain the difference between data and information.
Answer: The data are raw facts and figures like numbers, alphabets, words, and symbols. On the other hand, information is processed data that makes some sense, like Amit is 25 years old.
2) Give some examples of how data impacts our daily lives.
Answer: Online shopping sites impact our daily lives; online shopping sites recommend products based on your past purchases, Google Maps uses traffic data for the faster route, fitness apps track your calories burned, banks use transaction data to identify fraud, etc.
3) What are the different types of data loss?
Answer: There are different types of data loss:
- Accidental deletion
- Software corruptions
- Cyberattacks
- Hardware failure
- Natural disasters
4) What are data footprints? What are the different types of data footprints?
Answer: For all the activities we do on the internet, we create trails of data. These trails of data are called data footprints. It includes the websites we visit, the emails we send and receive, the messages we send and receive when chatting, etc. Data footprints can be classified into two categories.
- Active: When you post something on social media, like images, comments, likes, or content.
- Passive: When the data is collected without your direct input, like your location or from the browser history.
5) Explain the DIKW model.
Answer: The DIKW model is a data-information-knowledge-wisdom pyramid; the DIKW model helps to convert raw data to meaningful data. The raw data become information when we organize, understand, and analyze content.
6) Why should you keep a data recovery plan?
Answer: We should keep a data recovery plan because we have to protect data against accidental loss or cyberattacks and to ensure quick recovery of important files when everything is lost.
7) How do online streaming platforms use data?
Answer: The online streaming platforms use data to track what you watch to recommend similar shows and use viewing time. They also monitor user behavior to improve app design and performance.
8) What is personal data, and how can you keep your data safe online?
Answer: Personal data is like your name, address, phone number, photos, and password. This data you have to keep safe online. The safety tips are:
- Use a strong and unique password.
- Check the privacy settings.
- Avoid sharing sensitive information.
- Open only trusted websites.
- Check the HTTPS connections.
- Higher Order Thinking Skills (HOTS)
9) Explain what a data footprint is, where it is stored, how you can manage your data footprint, and who can follow your digital footprint for your social media account where you post pictures.
Answer: The data footprint is the trail of data you leave behind when you use the internet, like posting images, liking photos, searching on Google, etc. The data footprint is stored in:
- In cookies and trackers used by websites
- On the server of the website
- In cloud storage
To manage the data footprint, first check your privacy settings on social media, delete old posts or unused accounts, use strong passwords, clear browser history and cookies, and always think before you post. Anyone online can follow your digital footprint, like advertisers, hackers, friends and strangers, employers, schools, etc.
10) Give a few examples of how your data can be lost and why it is essential to have a data recovery plan. Please make a list of all the data that needs to be kept safe so that you do not lose it. Example: Birth certificate.
Answer: We should keep a data recovery plan because we have to protect data against accidental loss or cyberattacks, phone or laptop crashes, virus or malware attacks, forgetting passwords, natural disasters, theft or loss of devices, etc. The data recovery plan is important to help you restore important files quickly, reduce damage after data loss, keep your documents safe, and ensure that the business or organization works smoothly. The data that are needed to be kept safe are identity documents like birth certificates, Aadhar cards, passports, etc. Education records like certificates, marksheets, etc. Financial information like bank details, tax documents, etc. Medical records like vaccination records, etc. Legal documents like rental agreements, property papers, etc.
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