Class 9 Computer & AI Chapter 7: Working with Real Indian Data — practice questions with answers
Free practice for Class 9 Computer & AI, Chapter 7: Working with Real Indian Data. Try the solved questions below, then take a free test with instant marking and explanations.
43 questions17 easy, 20 medium, 6 hardNCERT · CBSE · State boards
Sample questions with solutions
Q1. What does the chapter say matters most for a working AI?
- Good data — a simple model with great data beats a fancy model with messy data
- Only a clever algorithm
- The most expensive computer
- The longest code
Show answer
Answer: A. Good data — a simple model with great data beats a fancy model with messy data
Why: Garbage data → garbage AI. [AI for New Learner — Senior 1, Ch 7]
Why: Garbage data → garbage AI. [AI for New Learner — Senior 1, Ch 7]
Q2. Which website is India’s open government data portal with lakhs of free datasets?
- data.gov.in
- irctc.co.in
- incometax.gov.in
- digilocker.gov.in
Show answer
Answer: A. data.gov.in
Why: Over 6 lakh datasets. [AI for New Learner — Senior 1, Ch 7]
Why: Over 6 lakh datasets. [AI for New Learner — Senior 1, Ch 7]
Q3. Which command loads a CSV file into a pandas DataFrame?
- pd.read_csv('file.csv')
- pd.open('file.csv')
- df.head('file.csv')
- pd.load_file('file.csv')
Show answer
Answer: A. pd.read_csv('file.csv')
Why: A DataFrame is a table. [AI for New Learner — Senior 1, Ch 7]
Why: A DataFrame is a table. [AI for New Learner — Senior 1, Ch 7]
Q4. What does df.head() show?
- The first 5 rows
- The last row only
- The column averages
- The missing values
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Answer: A. The first 5 rows
Why: Always peek at the data first. [AI for New Learner — Senior 1, Ch 7]
Why: Always peek at the data first. [AI for New Learner — Senior 1, Ch 7]
Q5. One row shows onion at ₹50,000 per kg while others are ₹20–200. How should it be treated?
- As an outlier, probably a typo — investigate and drop or flag it
- As the most important value
- As the new average
- Ignore all other rows
Show answer
Answer: A. As an outlier, probably a typo — investigate and drop or flag it
Why: Use describe() to see min/max. [AI for New Learner — Senior 1, Ch 7]
Why: Use describe() to see min/max. [AI for New Learner — Senior 1, Ch 7]
Q6. What is the FIRST thing you should do after loading a new CSV?
- Inspect it with df.head() and df.info()
- Train a model immediately
- Delete half the rows
- Publish it
Show answer
Answer: A. Inspect it with df.head() and df.info()
Why: Find missing values, formats and types first. [AI for New Learner — Senior 1, Ch 7]
Why: Find missing values, formats and types first. [AI for New Learner — Senior 1, Ch 7]
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How many practice questions are there for Class 9 Computer & AI Chapter 7: Working with Real Indian Data?
43 questions (17 easy, 20 medium, 6 hard). A few are solved on this page; the free test shows the answer and explanation for every question after you submit.
Is this chapter from the NCERT book?
Yes — it follows the NCERT Class 9 Computer & AI syllabus, used by CBSE and many state boards.