π₯ Crack the Python Interview
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Welcome back to Pandas Daily! Your daily 5-minute boost to becoming confident in Python. β Python interviews rarely ask for theory. So today we go through most common, application based questions asked in interviews with simple snippets. Most concepts are covered in our past issues and you can do a quick refresher here. If you like this format time to time, do give your feedback in the poll at the end. β βͺοΈ Reverse a string
In:
text = "samplestring"
# [start : stop : step] # leaving start/stop empty means use whole string # step = -1 means go backwards, one character at a time reversed_text = text[::-1] print(reversed_text)
Out: gnirtselpmas
β π Check for Palindrome (words reading same forward and backward)
In:
word = "level" is_palindrome = word == word[::-1] # logic used in above snippet print(is_palindrome)
Out: True
β π Count number of vowels in a sentence
In:
sentence = "Pandas Daily is superb" # define a string # loop over each character, make it lowercase, check if it is a vowel count = sum(1 for char in sentence if char.lower() in "aeiou") print(count)
Out: 7
β β¨ Print even numbers in a given range
In:
start, end = 10, 18 # for loop to go through numbers from start to end # x % 2 gives remainder when divided by 2 evens = [x for x in range(start, end+1) if x % 2 == 0] print(evens)
Out: [10, 12, 14, 16, 18]
β πͺ Max value in a list
In:
numbers = [3, 18, 7, 2] max_value = max(numbers) print(max_value)
Out: 18
β π Fibonacci Sequence [ π Outsmart the interviewers]
In:
n = 5 # how many numbers in sequence fib = [0, 1] # sequence starts with 0 and 1 # loop to get other 3 numbers for _ in range(2, n): # each new number = sum of last two numbers in the list fib.append(fib[-1] + fib[-2]) print(fib[:n])
Out: [0, 1, 1, 2, 3]
β π₯ Remove duplicates from list
In:
values = [1, 3, 3, 5, 1] # 'set' is a datatype with unique elements # convert list to set then back to list unique_values = list(set(values)) print(unique_values)
Out: [1, 3, 5]
β π¨π§ List Comprehension: Squares of Numbers
In:
nums = [2, 4, 6] # for loop runs through each number and multiplies it by itself squares = [x*x for x in nums] print(squares)
Out: [4, 16, 36]
βπ£ That's it for today! If you liked it, please share it with anyone who will find it useful and share your feedback below πΌ
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