MCQs

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Overall MCQs for Reference

1. Which function is used in Python to find the maximum value in a list?
   a. min()
   b. sum()
   c. average()
   d. max()
   Answer: d. max()w3schools​
2. What does the abs() function return in Python?
   a. Absolute value
   b. Average value
   c. Minimum value
   d. Maximum value
   Answer: a. Absolute valuegeeksforgeeks​
3. In R, which function calculates the arithmetic mean?
   a. sum()
   b. median()
   c. mean()
   d. var()
   Answer: c. mean()geeksforgeeks​
4. What does the sqrt() function compute?
   a. Cube root
   b. Minimum value
   c. Square root
   d. Absolute value
   Answer: c. Square rootgeeksforgeeks​
5. Which function rounds a number to the nearest integer in Python?
   a. floor()
   b. ceil()
   c. round()
   d. int()
   Answer: c. round()w3schools​
6. What function is used in R to find the standard deviation?
   a. mean()
   b. median()
   c. sd()
   d. abs()
   Answer: c. sd()geeksforgeeks​
7. Which Python function sums all elements in a list?
   a. avg()
   b. mean()
   c. sum()
   d. total()
   Answer: c. sum()w3schools​
8. In R, which function gives the median value?
   a. mean()
   b. median()
   c. var()
   d. mode()
   Answer: b. median()geeksforgeeks​
9. What does np.log() in NumPy compute?
   a. Logarithm (base e)
   b. Square root
   c. Logarithm (base 10)
   d. Absolute value
   Answer: a. Logarithm (base e)w3schools​
10. The var() function in R returns:
    a. Range
    b. Mean
    c. Variance
    d. Sum
    Answer: c. Variancegeeksforgeeks​
11. Which function in Python returns the smallest item in an iterable?
    a. min()
    b. mean()
    c. sum()
    d. sort()
    Answer: a. min()w3schools​
12. Which R function provides the correlation between two variables?
    a. mean()
    b. median()
    c. cor()
    d. var()
    Answer: c. cor()geeksforgeeks​
13. In Python, what does the pow() function calculate?
    a. Modulo
    b. Power of a number
    c. Average
    d. Square root
    Answer: b. Power of a numberw3schools​
14. What is the purpose of the floor() function in Python?
    a. Rounds up
    b. Rounds down
    c. Finds median
    d. None of the above
    Answer: b. Rounds downw3schools​
15. Which function in R truncates decimal digits?
    a. round()
    b. ceiling()
    c. trunc()
    d. abs()
    Answer: c. trunc()geeksforgeeks​
16. What does np.mean() return in NumPy?
    a. Median
    b. Mean
    c. Variance
    d. Mode
    Answer: b. Meanw3schools​
17. Which function in Python returns the value of e raised to a power?
    a. exp()
    b. log()
    c. pow()
    d. sqrt()
    Answer: a. exp()w3schools​
18. The R function max() returns:
    a. Sum of elements
    b. Maximum value
    c. Mean value
    d. Maximum index
    Answer: b. Maximum valuegeeksforgeeks​
19. What is returned by the Python divmod() function?
    a. Quotient and remainder
    b. Only quotient
    c. Only remainder
    d. None of the above
    Answer: a. Quotient and remainderw3schools​
20. In R, the function sum() is used to get:
    a. Product
    b. Mean
    c. Sum
    d. Range
    Answer: c. Sumgeeksforgeeks​
21. Which NumPy function computes the cumulative sum of an array?
    a. np.sum()
    b. np.cumsum()
    c. np.add()
    d. np.prod()
    Answer: b. np.cumsum()w3schools​
22. What does the prod() function calculate in R?
    a. Product of values
    b. Sum of values
    c. Mean value
    d. Mode
    Answer: a. Product of valuesgeeksforgeeks​
23. In Python, which function gives the ceiling of a number?
    a. floor()
    b. ceil()
    c. round()
    d. int()
    Answer: b. ceil()w3schools​
24. Which R function returns the minimum value of a vector?
    a. min()
    b. max()
    c. sum()
    d. abs()
    Answer: a. min()geeksforgeeks​
25. Which function would you use to calculate logarithm base 10 in Python?
    a. log10()
    b. log()
    c. exp()
    d. sqrt()
    Answer: a. log10()w3schools​
26. Which function in R is used for logarithm base 2?
    a. log2()
    b. log10()
    c. log()
    d. exp()
    Answer: a. log2()geeksforgeeks​
27. What does the np.std() function compute?
    a. Mean
    b. Variance
    c. Standard deviation
    d. Mode
    Answer: c. Standard deviationw3schools​
28. In R, to round up a number you use:
    a. floor()
    b. trunc()
    c. ceiling()
    d. abs()
    Answer: c. ceiling()geeksforgeeks​
29. The diff() function in Python returns:
    a. Sum of array
    b. Difference between adjacent elements
    c. Sorted array
    d. None of the above
    Answer: b. Difference between adjacent elementsw3schools​
30. Which R function sums the elements in a vector?
    a. mean()
    b. max()
    c. sum()
    d. median()
    Answer: c. sum()geeksforgeeks​
31. What would np.median() compute in a NumPy array?
    a. Variance
    b. Mean
    c. Median
    d. Sum
    Answer: c. Medianw3schools​
32. In R, the function mean() computes:
    a. Standard deviation
    b. Variance
    c. Arithmetic mean
    d. Maximum value
    Answer: c. Arithmetic meangeeksforgeeks​
33. Which Python function sorts a list in ascending order?
    a. sort()
    b. mean()
    c. abs()
    d. pow()
    Answer: a. sort()w3schools​
34. Which function finds the count of elements in an array in R?
    a. count()
    b. length()
    c. sum()
    d. mean()
    Answer: b. length()geeksforgeeks​
35. What does np.var() return in NumPy?
    a. Variance
    b. Mean
    c. Median
    d. Minimum value
    Answer: a. Variancew3schools​
36. In R, which function computes the range of data?
    a. range()
    b. mean()
    c. round()
    d. sum()
    Answer: a. range()geeksforgeeks​
37. The round() function in Python can take how many arguments (including optional)?
    a. 1
    b. 2
    c. 3
    d. 4
    Answer: b. 2w3schools​
38. Which function returns the index of the maximum value in a NumPy array?
    a. np.argmax()
    b. np.max()
    c. np.index()
    d. np.mean()
    Answer: a. np.argmax()w3schools​
39. What is the output of the R function median()?
    a. Mean value
    b. Median value
    c. Standard deviation
    d. Sum of values
    Answer: b. Median valuegeeksforgeeks​
40. Which function computes the sign of a number in NumPy?
    a. np.sign()
    b. np.sum()
    c. np.log()
    d. np.sort()
    Answer: a. np.sign()w3schools​
41. The length() function in R gives:
    a. The sum of vector’s elements
    b. Number of elements in a vector
    c. The mean
    d. The median
    Answer: b. Number of elements in a vectorgeeksforgeeks​
42. Which function in Python returns the largest integer less than or equal to a number?
    a. ceil()
    b. floor()
    c. abs()
    d. mean()
    Answer: b. floor()w3schools​
43. Which R function can be used to round a number to a certain number of decimal places?
    a. ceiling()
    b. round()
    c. floor()
    d. trunc()
    Answer: b. round()geeksforgeeks​
44. np.ptp() in NumPy returns:
    a. Peak-to-peak range (max-min)
    b. Product
    c. Mean
    d. Mode
    Answer: a. Peak-to-peak range (max-min)w3schools​
45. The sum() function in Python can operate on which data structures?
    a. Lists
    b. Tuples
    c. Arrays
    d. All of the above
    Answer: d. All of the abovew3schools​
46. In R, which function returns the product of all elements in a vector?
    a. sum()
    b. prod()
    c. mean()
    d. diff()
    Answer: b. prod()geeksforgeeks​
47. Which Python function is used for modular division?
    a. mod()
    b. %
    c. pow()
    d. divmod()
    Answer: d. divmod()w3schools​
48. What function calculates the cumulative product in NumPy?
    a. np.prod()
    b. np.cumprod()
    c. np.sum()
    d. np.diff()
    Answer: b. np.cumprod()w3schools​
49. Which function in R returns sorted elements of a vector?
    a. order()
    b. sort()
    c. rank()
    d. max()
    Answer: b. sort()geeksforgeeks​
50. What is the result of np.round(3.145, 2) in NumPy?
    a. 3.1
    b. 3.14
    c. 3.15
    d. 3
    Answer: b. 3.14w3schools​

1. https://www.w3schools.com/datascience/ds_python.asp
2. https://www.geeksforgeeks.org/r-language/functions-in-r-programming/
3. https://www.sanfoundry.com/1000-data-science-questions-answers/
4. https://www.interviewbit.com/data-science-mcq/
5. https://interviewkickstart.com/blogs/articles/data-science-mcq-answers
6. https://www.scribd.com/document/705848941/Data-Science-MCQ-Questions-and-Answer-PDF
7. https://www.geeksforgeeks.org/quizzes/top-50-data-structures-mcqs-with-answers/
8. https://www.linkedin.com/pulse/python-functions-applications-data-science-yasin-tan%C4%B1%C5%9F-2memf
9. https://towardsdatascience.com/3-common-data-analysis-operations-with-3-common-tools-9288ce61a40f/
10. https://www.gyansetu.in/blog/data-science-objective-type-mcq-quiz-interview-preparation/
11. https://r4ds.had.co.nz/functions.html
12. https://datasciencedojo.com/blog/data-analysis-expressions/
13. https://www.placementpreparation.io/mcq/data-science/page/2/
14. https://r4ds.hadley.nz/functions.html
15. https://www.formpl.us/blog/numerical-data
16. https://www.sanfoundry.com/data-science-questions-answers-probability-statistics/
17. https://www.datacamp.com/blog/python-vs-r-for-data-science-whats-the-difference
18. https://www.geeksforgeeks.org/data-analysis/data-analysis-tutorial/
19. https://www.includehelp.com/mcq/statistics-in-data-science-multiple-choice-questions-mcqs.aspx
20. https://en.wikipedia.org/wiki/Numerical_analysis