Table of Contents
- 1 Introduction
- 1.1 Question 1: What is Python?
- 1.2 Question 2: Why is Python better than Java?
- 1.3 Question 3: How many data types are there in Python?
- 1.4 Question 4: What’s the difference between a ‘tuple’ and a ‘list’?
- 1.5 Question 5: What’s ‘pickling’ and ‘unpickling’?
- 1.6 Question 6: What is ‘lambda’?
- 1.7 Question 7: How is memory managed within Python?
- 1.8 Question 8: What is ‘pass’?
- 1.9 Question 9: Can you copy an object in Python?
- 1.10 Question 10: How to delete a file within Python?
- 1.11 Question 11: What is a ‘dictionary’?
- 1.12 Question 12: Is Python an interpreted language?
- 1.13 Question 13: Which of these is wrong?
- 1.14 Question 14: How is Python object-oriented?
- 1.15 Question 15: What is ‘slicing’?
- 2 Python Interview Questions: Advanced
- 2.1 Question 1: Write a code that would calculate a list of given numbers.
- 2.2 Question 2: Write a code that would randomize items from the list.
- 2.3 Question 3: Is there a difference between ‘range’ and ‘xrange’?
- 2.4 Question 4: What is a Dogpile effect?
- 2.5 Question 5: Explain what is Encapsulation.
- 2.6 Question 6: When does Abnormal Termination happen?
- 2.7 Question 7: Write a code that would count all of the capital letters in your file.
- 2.8 Question 8: Does Python have a compiler?
- 2.9 Question 9: What is Monkey Patching?
- 2.10 Question 10: How to save an image when you know the URL?
- 2.11 Question 11: If list1 is [4, 6, 8, 1, 0, 3], what will list1[-1] be?
- 2.12 Question 12: What is a ‘decorator’?
- 2.13 Question 13: What are the ‘sub()’, ‘subn()’ and ‘split()’ methods?
- 2.14 Question 14: What do the processes of ‘compiling’ and ‘linking’ do?
- 2.15 Question 15: What do the functions ‘help()’ and ‘dir()’ do?
- 3 General Tips
- 4 Conclusions
IntroductionLet’s take it from the top and start off by covering the more general Python interview questions and answers. These are questions that you are most likely to get asked at the beginning of the interview, just to see if you truly do have the fundamental understanding about Python. After that, we’ll move on to some technical questions and finish off with a few general tips and advice.
Question 1: What is Python?As you’ve probably expected, this is one of the very first Python interview questions that you’re bound to get asked. Your employers are probably going to expect a concise and thorough answer, so let’s provide them one. Python is a portable, high-level programming language that has inbuilt automatic memory management, threads, strings, is object-based. It is loved for the simplicity and built-in data structure – the fact that Python is open source also contributes to its fame.
Question 2: Why is Python better than Java?Some of your Python interview questions might involve comparisons with other programming languages – these can be random, but Java seems like the most common one that employers ask.
Question 3: How many data types are there in Python?One of the more common interview questions on Python – you might get asked to either say the number or actually name them. Python has five different data types: string, list, number, dictionary, and tuple.
Question 4: What’s the difference between a ‘tuple’ and a ‘list’?The main difference is that lists are slower, but they can be edited, while tuples work faster, but cannot be modified.
Question 5: What’s ‘pickling’ and ‘unpickling’?Pickling happens when a module within Python is accepted and converted into a string module, and then later dumped into the file. As opposed to that, unpickling is when you retrieve the string module from the file. For such comparison-based Python interview questions, try to keep your explanations as simple as possible. Your potential employers will probably appreciate that you are able to explain tough topics in a simple-to-understand manner.
Question 6: What is ‘lambda’?Lambda is an anonymously performed function with just one, single expression.
Question 7: How is memory managed within Python?
Question 8: What is ‘pass’?Pass simply indicates a space that should be left blank within the compound statement.
Question 9: Can you copy an object in Python?Even though it sounds like one of the basic Python interview questions, you would probably be surprised how many people actually manage to stumble with it. Yes, you can copy objects in Python, but not all of them. The most general and well-known way to do it is to use the copy.copy() command.
Question 10: How to delete a file within Python?To delete something in Python, use the command os.remove(name_of_the_file).
Question 11: What is a ‘dictionary’?Remember the data types that we’ve talked about earlier? The inbuilt ones? A dictionary is exactly that. Dictionaries are comprised of keys and the key corresponding values. Here’s an example:
print dict[Car] Ford
print dict[Type] Mustang
print dict[Year] 1967
Question 12: Is Python an interpreted language?
Question 13: Which of these is wrong?a) xyz = 5,000,000 b) x,y,z = 1000, 3000, 7000 c) x y z = 1000 3000 7000 d) x_y_z = 5,000,000 The answer: C is the wrong one.
Question 14: How is Python object-oriented?Object-oriented programming languages (OOPs) are based on classes and objects of those classes. Python is exactly that.
Question 15: What is ‘slicing’?In Python, slicing is when you select multiple items from places like lists, strings and so on. So – those are the more basic Python interview questions that you might receive during your job interview. Now, let’s try and move more towards the advanced stuff and some untouched Python technical interview questions.
Python Interview Questions: Advanced
Question 1: Write a code that would calculate a list of given numbers.
def list_sum(num_List):The Result:
if len(num_List) == 1:
return num_List else:
return num_List + list_sum(num_List[1:])
print(list_sum([3, 5, 8, 9, 9]))
Question 2: Write a code that would randomize items from the list.
from random import shuffleThe result: [‘Nords’, ‘Skyrim’, ‘To’, ‘Belongs’, ‘The’].
x = ['Skyrim', 'Belongs', 'To', 'The', 'Nords'] shuffle(x)
Question 3: Is there a difference between ‘range’ and ‘xrange’?
Question 4: What is a Dogpile effect?This is one of the Python interview questions that might be tricky to memorize at first, so do give it a few good tries. A Dogpile effect happens when a website’s cache expires, yet it is hit by many different requests from the user. This can cause many different problems, from lag spikes to complete crashes. A system called semaphore lock is used to prevent Dogpiles from happening.
Question 5: Explain what is Encapsulation.Encapsulation is one of the features that Python has because it’s an object-oriented programming language. Be sure to add this to your answer in one of your Python interview questions. Encapsulation is a process of grouping related data members into one, single place. Along with the member themselves, encapsulation also returns their functions, too.
Question 6: When does Abnormal Termination happen?First of all, it should be said – abnormal termination is bad. You don’t want it to happen in your coding experience, although it’s almost unavoidable at one point or another, especially when you’re a beginner programmer.
Question 7: Write a code that would count all of the capital letters in your file.
with open(I_LIKE_APPLES) as fh:
count = 0
text = fh.read()
for character in text:
count += 1
Question 8: Does Python have a compiler?This is actually one of the tougher Python interview questions, mostly because not many people pay attention to it. Python indeed does have its own compiler, but it’s rather easy to miss. This is because it works automatically – you don’t really notice it.
Question 9: What is Monkey Patching?Monkey patching refers to modifications that you would make to the code when it’s already running.
Question 10: How to save an image when you know the URL?To save an image locally, you would use this type of a code:
Question 11: If list1 is [4, 6, 8, 1, 0, 3], what will list1[-1] be?“-1” always points to the last index in a list, so the answer would be 3.
Question 12: What is a ‘decorator’?
Question 13: What are the ‘sub()’, ‘subn()’ and ‘split()’ methods?A module called “re” lets you modify your strings in Python. There are three methods of how you can do this:
- sub(): finds specific strings and replaces them.
- subn(): same as the sub(), but also return the new strings with the exact number of replacements.
- split(): splits a specific string into a list.