Python interview questions and answers to know before interviewing


Django uses SQLite by default; it is easy for Django users as such it won’t require any other type of installation. In the case your database choice is different that you have to the following keys in the DATABASE ‘default’ item to match your database connection settings.

Is Python developer a good career?

Being a Python developer is a good career choice, mainly due to the increasing demand for Python developers in many industries. Many high profile companies such as Google and Facebook use Python, and it also has a high paying salary with an average of $120,000 USD per year.

The unittest module provides classes that make it easy to support these qualities for a set of tests. The data in the failed server won’t get removed, but there is a provision for auto-failure, which you can configure for multiple nodes. Fail-over can be triggered during any kind of socket or Memcached server level errors and not during normal client errors like adding an existing key, etc. The use of the split function in Python is that it breaks a string into shorter strings using the defined separator. It gives a list of all words present in the string. A generator will save the states of the local variables every time ‘yield’ will pause the loop.

Is multiple inheritance possible in Python?

The Python interview questions and answers we’ve listed here will do a good job of preparing you. We’ve divided these Python interview questions into beginner and advanced sections. We have also included some Python technical interview questions. Python has increased in popularity among developers with each passing year since its introduction. We observed above how, according to studies, Python may not be at the top, but it will undoubtedly be the programming language of the future in 3-4 years.

  • To convert, e.g., the number 144 to the string ‘144’, use the built-in function str().
  • Only a graduation degree is not enough in this competitive world.
  • It is a string’s function which converts all uppercase characters into lowercase and vice versa.
  • A mechanism to select a range of items from sequence types like list, tuple, strings etc. is known as slicing.
  • You could calculate them yourself with nested for-loops, or you could use the powerful itertools library.
  • Also, Python implements namespaces in the form of dictionaries and maintains name-to-object mapping where names act as keys and the objects as values.

If you are an experienced or fresher developer who is looking out for a way to become a Python Developer, you have to learn Python. This may seem obvious, but there are a few things to keep in mind when learning or mastering Python and its frameworks, such as Django and Flask. Write a program that checks if all of the numbers in a sequence are unique. The term GIL stands for Global Interpreter Lock.

Introduction to Python:

Structured and functional programming is supported. Write a program in Python for getting indices of N maximum values in a NumPy array.

Does AWS use Python?

The AWS SDK for Python (Boto3) enables you to use Python code to interact with AWS services like Amazon S3. For example, you can use the SDK to create an Amazon S3 bucket, list your available buckets, and then delete the bucket you just created.

This consists of the true or false values with a statement that has to be evaluated for it. Their corresponding values are India, Delhi and Modi respectively. Iterators are objects which can be traversed though or iterated upon.

What are the stages of the Python developer interview process?

It is useful for initializing any attributes or default behaviour of the object at the time of instantiation. Negative indexes are the indexes from the end of the list or tuple or string. Keyworded argument means a variable that has a name when passed to a function. Python as a language is not interpreted or compiled.

python developer interview questions

Decorators add functionality to the current function without changing its structure. It can also accept arguments and modify these arguments. If the copy is edited, the original become a python developer object will remain the same. Conflict resolution is a critical skill to have in a team. Developers should know how to communicate their ideas well to avoid miscommunication.

What are good Python interview questions?

If a variable is ever assigned a new value inside the function, the variable is implicitly local, and we need to declare it as ‘global’ explicitly. To make a variable globally, we need to declare it by using global keyword. A function is a block of code that performs a specific task whereas a decorator is a function that modifies other functions. Identity Operators both are used to check two values or variable which are located on the same part of the memory. Two variables that are equal does not imply that they are identical.

  • This behavior was a common source of confusion and consternation for neophyte Python programmers.
  • Behavioral Python interview questions focus on how you have handled past work situations.
  • The class keyword in Python is used to construct a class.
  • What is inheritance in Object-oriented programming?
  • Although Python can be used to write scripts, it is primarily used as a general-purpose programming language.
  • The list above does a good job of preparing you for a Python coding interview.

The lambda operator is used to create anonymous functions. It is mostly used in cases where one wishes to pass functions as parameters. Objects referenced from the global namespaces of Python modules are not always deallocated when Python exits. This may happen if there are circular references. But in Python, we do not have a switch-case statement. Else, you may use a set of if-elif-else statements.

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But, we need to write some extra code in normal functions compared to lambda functions for the same functionality. Lambda functions are small anonymous functions in Python. It has single expressions and accepts multiples arguments. The index is used to access the element from the lists. Join– the method is used to combine the list of string objects. It combines the string objects with the delimiter we provide.

  • Then there’s Google, which employs Python extensively in several of its initiatives.
  • When we want to execute a sequence of statements, we can give it a name.
  • Learn 30+ Python coding interview questions and answers here in this blog.
  • If the map has the value of (N-x), then there is our pair.
  • Going through these Python programming interview questions will help you to land your dream job in Data Science, Machine Learning or just Python coding.
  • The questions here will do a good job of preparing you as far as theory goes, but don’t neglect actually coding python programs for interviews.
  • All you have to do is, use the ‘+’ operator between the two tuples and you’ll get the concatenated result.

You have a long string of words with no punctuation or capital letters and you want to count how many times each word appears. Get() performs the same operations that were performed in the first approach, but now they’re handled automatically. If the key exists, then the proper value will be returned. Otherwise, the default value will get returned. This is worse than the first approach, because you have to compare every new word against every word already in the list. That means that as the number of words grows, the number of lookups grows quadratically.

Iterators are objects in Python which remember their state of iteration. It initializes the data with the __iter__ method and returns the next element using the __next__ method. The __init__ is the constructor method similar to the constructors in other OOP languages.

python developer interview questions