Python Quizzes for Job Interview Preparation

Sample of Python Quizzes and Questions for Job Interview

I'm doing some revision on python programming. May this helps you as well. Please try to understand the logic ya after seeing the code answer.

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Data Structure Quiz

1. Implement a group_by_owners function that:
   

   • Accepts a dictionary containing the file owner name for each file name.
   • Returns a dictionary containing a list of file names for each owner name, in any order.

   For example, for dictionary {'Input.txt': 'Randy', 'Code.py': 'Stan', 'Output.txt': 'Randy'} the group_by_owners function should return {'Randy': ['Input.txt', 'Output.txt'], 'Stan': ['Code.py']}.
   
   My code answer

   	from collections import defaultdict
   	def group_by_owners(files):
   	# Grouping dictionary keys by value
   	res = defaultdict(list)
   	for key, val in files.items():
   	res[val].append(key)
   	return res
   	if __name__ == "__main__":
   	files = {
   	'Input.txt': 'Randy',
   	'Code.py': 'Stan',
   	'Output.txt': 'Randy'
   	}
   	print(group_by_owners(files))

   view raw gistfile1.txt hosted with ❤ by GitHub

   
   Result: defaultdict(, {'Randy': ['Input.txt', 'Output.txt'], 'Stan': ['Code.py']}) 
   
   
   Some additional info:
   A defaultdict works exactly like a normal dict, but it is initialized with a function (“default factory”) that takes no arguments and provides the default value for a nonexistent key.
   
   A defaultdict will never raise a KeyError. Any key that does not exist gets the value returned by the default factory. 
2. Implement the IceCreamMachine's scoops method so that it returns all combinations of one ingredient and one topping. If there are no ingredients or toppings, the method should return an empty list.
   
   For example, IceCreamMachine(["vanilla", "chocolate"], ["chocolate sauce"]).scoops() should return [['vanilla', 'chocolate sauce'], ['chocolate', 'chocolate sauce']].
   
   My code answer
   

   	class IceCreamMachine:
   	def __init__(self, ingredients, toppings):
   	self.ingredients = ingredients
   	self.toppings = toppings
   	def scoops(self):
   	final_scoops = []
   	for ingredient in self.ingredients:
   	for topping in self.toppings:
   	final_scoops.append([ingredient,topping])
   	if(final_scoops):
   	return final_scoops
   	else:
   	return []
   	machine = IceCreamMachine(["vanilla", "chocolate"], ["chocolate sauce"])
   	print(machine.scoops()) #should print[['vanilla', 'chocolate sauce'], ['chocolate', 'chocolate sauce']]

   view raw gistfile1.txt hosted with ❤ by GitHub

   Result: [['vanilla', 'chocolate sauce'], ['chocolate', 'chocolate sauce']]