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Overall MCQs for Reference
- Which object is fundamental in NumPy?
a. Series
b. DataFrame
c. ndarray
d. List
Answer: c. ndarrayletsfindcourse - What does NumPy stand for?
a. Numerical Python
b. Number Python
c. Numeric Package
d. Numbers Power
Answer: a. Numerical Pythonprojectpro+1 - NumPy was created by:
a. Guido van Rossum
b. Travis Oliphant
c. Wes McKinney
d. Ross Ihaka
Answer: b. Travis Oliphantletsfindcourse - Which method creates an array of zeros?
a. np.zeros()
b. np.empty()
c. np.ones()
d. np.array()
Answer: a. np.zeros()interviewbit+1 - Which function is used to reshape a NumPy array?
a. reshape()
b. shift()
c. resize()
d. format()
Answer: a. reshape()sanfoundry+1 - What is the default data type of NumPy arrays?
a. int
b. float
c. object
d. double
Answer: b. floatfreshersnow+1 - NumPy arrays are:
a. Homogeneous
b. Heterogeneous
c. Mutable
d. Static
Answer: a. Homogeneousfinalroundai - Which function finds the mean of a NumPy array?
a. np.mean()
b. np.avg()
c. np.sum()
d. np.calc()
Answer: a. np.mean()finalroundai+1 - What does np.arange(5) generate?
a.w3schools+4
b.rfaqs+3
c.sanfoundry+4
d.freshersnow+4
Answer: b.w3schools+3 - Which attribute returns the shape of an array?
a. .shape
b. .size
c. .len
d. .format
Answer: a. .shapeprojectpro+1 - What is broadcasting in NumPy?
a. Element-wise multiplication
b. Implicit expansion of arrays
c. Data copying
d. Array slicing
Answer: b. Implicit expansion of arraysupesonline+1 - How can you access the element at second row, third column of a 2D array ‘arr’?
a. arrfreshersnow+1
b. arr(1,2)
c. arrsanfoundry+1
d. arrfreshersnow
Answer: c. arrrfaqs+2 - Which function is used to concatenate arrays in NumPy?
a. np.concat()
b. np.append()
c. np.concatenate()
d. np.merge()
Answer: c. np.concatenate()finalroundai+1 - What does np.random.seed(42) do?
a. Generates random number 42
b. Sets the random seed for reproducibility
c. Initializes zeros array
d. Updates the array’s shape
Answer: b. Sets the random seed for reproducibilityrfaqs - Which module in NumPy deals with masked arrays?
a. np.mask
b. np.ma
c. np.arraymask
d. np.data
Answer: b. np.maupesonline - What function generates a range of evenly spaced values?
a. np.range()
b. np.linspace()
c. np.spaced()
d. np.arange()
Answer: b. np.linspace()letsfindcourse+1 - Which of the following finds unique values in an array?
a. np.unique()
b. np.set()
c. np.find()
d. np.distinct()
Answer: a. np.unique()projectpro+1 - Which method returns the number of elements in an array?
a. .size
b. .count
c. .length
d. .num
Answer: a. .sizeinterviewbit+1 - What is the output type of np.dot()?
a. Scalar
b. Array
c. List
d. Set
Answer: b. Arrayrfaqs+1 - To transpose a 2D array, use:
a. arr.transpose()
b. arr.fliplr()
c. arr.reverse()
d. arr.T
Answer: d. arr.Tfinalroundai+1 - Which function is for element-wise addition of arrays?
a. np.add()
b. np.sum()
c. np.append()
d. np.concat()
Answer: a. np.add()finalroundai - How can missing values be handled in NumPy?
a. Using NaN and np.isnan()
b. Dropping rows
c. Filling with zero
d. Renaming columns
Answer: a. Using NaN and np.isnan()upesonline+1 - Which function loads an array from disk?
a. np.load()
b. np.import()
c. np.read()
d. np.fromfile()
Answer: a. np.load()projectpro+1 - Which function saves NumPy arrays to disk?
a. np.save()
b. np.store()
c. np.export()
d. np.dumps()
Answer: a. np.save()projectpro+1 - What does np.eye(3) create?
a. 3×3 identity matrix
b. 3×3 zeros
c. 3×3 ones
d. 3×3 random
Answer: a. 3×3 identity matrixletsfindcourse+1 - What function is used for statistical correlation in NumPy?
a. np.corrcoef()
b. np.covar()
c. np.core()
d. np.corr()
Answer: a. np.corrcoef()finalroundai - Which method changes the dtype of a NumPy array?
a. astype()
b. dtype()
c. typecast()
d. convert()
Answer: a. astype()letsfindcourse+1 - How do you create a 3D array in NumPy?
a. np.array([…])
b. np.zeros((3,3,3))
c. np.ones((3,3,3))
d. All of the above
Answer: d. All of the aboveletsfindcourse+1 - Which function produces random integers in NumPy?
a. np.randint()
b. np.random.randint()
c. np.random_int()
d. np.int()
Answer: b. np.random.randint()finalroundai+1 - What is the purpose of the “np.fromiter()” function?
a. Create array from iterator
b. Create array from file
c. Alias for np.array()
d. Generates random array
Answer: a. Create array from iteratorupesonline - Which function makes a deep copy of an array?
a. np.copy()
b. np.clone()
c. np.deepcopy()
d. np.mdeep()
Answer: a. np.copy()projectpro+1 - Which function returns the maximum value in an array?
a. np.max()
b. np.maximum()
c. np.amax()
d. All of the above
Answer: d. All of the abovefinalroundai - What is stride in NumPy?
a. Step-size to traverse array
b. Array shape
c. Data type
d. Index value
Answer: a. Step-size to traverse arrayfinalroundai - How would you flatten a 2D array into 1D?
a. arr.flatten()
b. arr.ravel()
c. arr.reshape(-1)
d. Any of the above
Answer: d. Any of the aboveprojectpro+1 - Which method calculates the standard deviation of array?
a. np.std()
b. np.deviate()
c. np.variance()
d. np.stddev()
Answer: a. np.std()projectpro+1 - Which function stacks arrays vertically?
a. np.vstack()
b. np.hstack()
c. np.dstack()
d. np.stackvertical()
Answer: a. np.vstack()projectpro+1 - What does np.isnan() test for?
a. NaN values
b. Zeros
c. Negative values
d. Infinity
Answer: a. NaN valuesupesonline+1 - Which of the following is not a valid NumPy function?
a. np.array()
b. np.arr()
c. np.linspace()
d. np.arange()
Answer: b. np.arr()letsfindcourse+1 - What does np.argsort() return?
a. Sorted array indices
b. Sorted array
c. Array length
d. Unique values
Answer: a. Sorted array indicesfinalroundai+1 - What is the output of np.zeros((2,3))?
a. 2×3 matrix of zeros
b. List of 6 zeros
c. Array of ones
d. 3×2 matrix of zeros
Answer: a. 2×3 matrix of zerosinterviewbit+1 - Which attribute gives the number of dimensions?
a. ndim
b. size
c. shape
d. dim
Answer: a. ndiminterviewbit+1 - np.arange(10,20,2) outputs:
a.includehelp+4
b.gyansetu+4
c.geeksforgeeks+3
d.datacamp+4
Answer: a.devopsschool+5 - What does np.full((3,3), 7) create?
a. 3×3 matrix of sevens
b. 1D array of sevens
c. Empty array
d. Zeros array
Answer: a. 3×3 matrix of sevensprojectpro+1 - Which function removes duplicate elements from an array?
a. np.unique()
b. np.duplicate()
c. np.remove()
d. np.distinct()
Answer: a. np.unique()finalroundai+1 - How can you reverse an array?
a. arr[::-1]
b. arr.reverse()
c. np.flip(arr)
d. Either a or c
Answer: d. Either a or cprojectpro+1 - Which function surfaces minimum value in array?
a. np.min()
b. np.minimum()
c. np.amin()
d. All of the above
Answer: d. All of the abovefinalroundai - What does np.savetxt() do?
a. Saves array to text file
b. Reads array from text
c. Merges arrays
d. Counts array lines
Answer: a. Saves array to text filefinalroundai - Which attribute gives item size of an array?
a. itemsize
b. items
c. sizeof
d. size
Answer: a. itemsizeinterviewbit - How does NumPy handle different-dimension arrays in operations?
a. Broadcasting
b. Padding
c. Copying
d. Slicing
Answer: a. Broadcastingupesonline+1 - What is the output of np.ones((2,2), dtype=int)?
a. 2×2 array of ones (integers)
b. 2×2 array of zeros
c. 1D array of ones
d. 2×2 array of floats
Answer: a. 2×2 array of ones (integers)letsfindcourse+1
- https://letsfindcourse.com/data-science/python-numpy-mcq-questions
- https://www.projectpro.io/article/numpy-interview-questions-and-answers/980
- https://www.interviewbit.com/numpy-interview-questions/
- https://www.sanfoundry.com/data-science-questions-answers-campus-interviews/
- https://www.finalroundai.com/blog/numpy-interview-questions
- https://www.freshersnow.com/numpy-mcqs-and-answers-with-explanation/
- https://www.w3schools.com/python/numpy/numpy_quiz.asp
- https://rfaqs.com/python-quizzes/python-numpy-mcqs-11/
- https://upesonline.ac.in/blog/frequently-asked-numpy-interview-questions
- https://www.includehelp.com/python/numpy-mcqs.aspx
- https://www.geeksforgeeks.org/numpy/numpy-interview-questions/
- https://www.datacamp.com/blog/numpy-interview-questions
- https://www.devopsschool.com/blog/top-50-interview-questions-and-answers-of-numpy/
- https://www.gyansetu.in/blog/data-analytics-mcq-quiz-for-interview/
- https://www.geeksforgeeks.org/quizzes/python-numpy-quiz/
- https://www.sanfoundry.com/1000-data-science-questions-answers/
- https://www.scribd.com/document/724165142/Numpy-Multiple-Choice-Questions-And-Answers-NF-AI
- https://github.com/Devinterview-io/numpy-interview-questions
