Test your Python skills with these 20 practice questions and solutions from Day 2 of Learning Python for Data Science. Covers string operations, data types, and more!
1. What will be the output of the following code?
x = "123"
y = int(x)
print(type(y))Solution:
# Output: <class 'int'>2. Extract the substring “learn” from the given string:
sentence = "Let's learn Python!"Solution:
substring = sentence[6:11]
print(substring) # Output: 'learn'3. Convert the float 7.5 into an integer and print the result.
Solution:
num = 7.5
int_num = int(num)
print(int_num) # Output: 74. Write a Python program to convert “Hello World” to uppercase.
Solution:
text = "Hello World"
print(text.upper()) # Output: 'HELLO WORLD'5. What is the output of the following code?
x = "Data"
y = "Science"
print(x + y)Solution:
# Output: 'DataScience'6. Find the length of the string “Python Programming” using a built-in function.
Solution:
text = "Python Programming"
print(len(text)) # Output: 187. Write a Python code to extract “Science” from the string “Data Science”.
Solution:
text = "Data Science"
print(text[5:]) # Output: 'Science'8. What will be the result of "Python"[::-1]?
Solution:
print("Python"[::-1]) # Output: 'nohtyP'9. How can you check if a string starts with a specific letter? (Use an example)
Solution:
text = "Python Programming"
print(text.startswith("P")) # Output: True10. Replace all occurrences of “a” with “o” in the string “Data Analysis”.
Solution:
text = "Data Analysis"
print(text.replace("a", "o")) # Output: 'Doto Anolysis'11. Convert the string “PYTHON” to lowercase.
Solution:
text = "PYTHON"
print(text.lower()) # Output: 'python'12. What will be the output of "Hello" * 3?
Solution:
print("Hello" * 3) # Output: 'HelloHelloHello'13. Extract the last 3 characters from the string “Data Science”.
Solution:
text = "Data Science"
print(text[-3:]) # Output: 'nce'14. Given a string text = " Machine Learning ", write a Python command to remove leading and trailing spaces.
Solution:
text = " Machine Learning "
print(text.strip()) # Output: 'Machine Learning'15. Convert the integer 2024 into a string.
Solution:
num = 2024
print(str(num)) # Output: '2024'16. What function is used to determine the data type of a variable? Provide an example.
Solution:
num = 10
print(type(num)) # Output: <class 'int'>17. Write a Python program to check whether a given string is empty or not.
Solution:
text = ""
print(len(text) == 0) # Output: True18. What is the output of print("5" + "5")?
Solution:
# Output: '55' (String concatenation, not addition)19. Given a variable a = "Python", write a command to extract the first three characters.
Solution:
a = "Python"
print(a[:3]) # Output: 'Pyt'20. What is the difference between .lower() and .casefold() in Python strings?
Solution: .lower() converts a string to lowercase but .casefold() is more aggressive as it is designed for case-insensitive string matching, handling special cases for certain languages.
Example:
text = "ß"
print(text.lower()) # Output: 'ß'
print(text.casefold()) # Output: 'ss'Conclusion
These practice questions cover Python string manipulation, type conversions, and essential built-in functions. Practicing them will help solidify your understanding of these fundamental concepts.
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Also Read:
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- Day 3 of Learning Python for Data Science
- Practice Questions and Answers for Day 2 of Learning Python for Data Science
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Hi, I am Vishal Jaiswal, I have about a decade of experience of working in MNCs like Genpact, Savista, Ingenious. Currently i am working in EXL as a senior quality analyst. Using my writing skills i want to share the experience i have gained and help as many as i can.
