Python Libraries

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Question 1

What does the heapq module in Python provide?


  • Binary Search Tree implementation

  • Priority Queue via heaps

  • Balanced AVL Tree

  • Linked List operations


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Question 2

What will be the output of the following code?

Python 
import heapq
nums = [4, 1, 3]
heapq.heapify(nums)
print(nums[0])



  • 4

  • 1

  • 3

  • [1, 3, 4]

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Question 3

What does heapq.heappush() do?


  • Pops the largest element

  • Pushes an element and maintains max-heap

  • Inserts element and maintains min-heap

  • Sorts the list in-place


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Question 4

Which of the following is true about bisect.insort()?


  • Appends item without sorting

  • Inserts item while maintaining sorted order

  • Randomly inserts item

  • Removes item at index

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Question 5

Which stream does sys.stderr represent?


  • Standard input

  • Standard output

  • Standard error

  • Debug log

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Question 6

What will be the result of this code?

Python 
import array
arr = array.array('i', [1, 2, 3])
arr.append(4)
print(arr.tolist())



  • [1, 2, 3]

  • [1, 2, 3, 4]

  • [4, 3, 2, 1]

  • Error due to type mismatch

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Question 7

What will this output?

Python 
import platform
print(platform.system())



  • Python version

  • OS name like 'Windows' or 'Linux'

  • CPU name

  •  Hostname


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Question 8

What will the following code print?

Python 
import platform
print(platform.uname().node)


  • CPU vendor

  • System version

  • Hostname

  • Username

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Question 9

What will this code output?

Python 
import os
os.makedirs("dir1/dir2")


  • Creates one directory only

  • Raises an error

  • Creates nested directories dir1 and dir2

  • Deletes dir2 if exists

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Question 10

What is the purpose of functools.partial()?

  • Creates partial copies of data

  • Fixes some function arguments ahead of time

  • Delays execution

  • Wraps functions in lambdas

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