The Pickle module accepts any Python object and converts it into a string representation and dumps it into a file by using the dump function, this process is called pickling. While the process of retrieving original Python objects from the stored string representation is called unpickling. Everything in Python is an object and all variables hold references to the objects. The reference values are according to the functions; as a result, you cannot change the value of the references.

  • Try is the block of a code that is monitored for errors.
  • Python works great for data analysis especially for data mining, data processing and data visualization.
  • As a senior developer, you should portray a willingness to learn and a passion for the job.
  • In addition, you will likely also be asked Python interview questions that assess essential soft skills, such as communication and teamwork.
  • Apart from development jobs, Python developers are in huge demand for roles that involve data analysis, data manipulation, and data visualization.

One of the great time-saving features of DevSkiller Python coding challenges is that the tests are accessed remotely. This means applicants can take the test at a time most convenient to them. Once a test is submitted, DevSkiller begins evaluating the results and a non-technical report is then produced and sent to the recruiter. Python | Django | Currency Exchange Service – Finish implementation of Django application for currency exchange by modyfing CBV views and completing service logic.

Data Types

Python is growing tremendously in popularity due to its simplistic nature and ability to create multiple functionalities with a few lines of code. Today, developers use this programming language to build machine learning, artificial intelligence, Web development, and several other applications. The availability of powerful libraries, ease of understanding, and object-oriented approach make Python a preferred development language. As Python has applications in machine learning, AI, data science, and analytics, with the right skills and experience, developers can land jobs with the best perks. Read on to know all the questions and answers for python interviews due in 2022. Senior Python developers can find some of the best-paid jobs.

python interview questions for senior developer

But for an Immutable object like String, any change done within a method is not reflected outside. Python is an interpreted high-level programming language used for general purposes which is favored by a lot of developers because of its versatility and increased productivity. The slow overall performance of Python, its limited multiprocessing and threading capabilities are considered to be the major pitfalls of this programming language. Python grows exponentially due to its simplistic nature and the ability to perform several functions in just a few lines of code. Due to its ability to support powerful computations using powerful libraries, it is used in various domains and it become the reason for the huge demand for Python developers across the world.

What are Function Annotations in Python?

List slicing returns a new list from the existing list. Decorators are a very powerful and useful tool in Python as they are the specific change that we make in Python syntax to alter functions easily. Actually, Python is a partially compiled language and partially interpreted language. Decorators are the functions to add functionality to an existing process without making any changes to the structure of that function. The code will work because of the standard dictionary object in Python 2 or 3.

python interview questions for senior developer

Once the values in a frozenset are set, they cannot be changed. Frozenset is immutable and thus, hashable, and can be used as a dictionary key or as an element of another set. Methods from set on frozenset cannot be used and updated. A docstring in Python is a string used for adding comments or summarizing a piece of code in Python.

Search Senior Python Developer Interview Questions

We use PEP 8 to bring consistency to our code which makes it easier for other developers to read the code. While the Python interpreter is using GIL to lock T1, all other threads have to wait. After T1 finishes, it releases GIL and passes it to another thread T2 that needs it.

In other words, this lock belongs to the Python interpreter and it uses it to lock a thread. We also have something called Cython, which is the compiled language used to create CPython extensions. The Cython language is a superset of Python that supports several C programming language features. Use this Senior Python Developer job description template to attract experienced developers who build functional server-side applications.

What is List Comprehension? Give an Example.

But these are most helpful when an interviewer is trying to test your deep knowledge of Python. Now on the stack, the reference to a (that is stored on the private heap) is stored. The garbage collector’s job is to delete the objects (on the private heap) that are no longer referenced, meaning, it deletes the objects whose reference count reached zero.

python interview questions for senior developer

Empty code is not allowed in loops, function definitions, class definitions, or in if statements. This is one of the most impactful and advanced senior Python interview questions. Scalability means creating services and microservices that can handle millions of users (large loads) without going down. This is a challenge that must be handled properly and writing scalable code is one way to make our service scalable. GIL is one of the most controversial and important features of the CPython-based implementation of Python. GIL, or Global Interpreter Lock, is a construct/tool that makes sure that only one thread at a time can execute a Python program.

It would help if you tried to tell the interviewers how you stay up to date with the latest developments. You can tell them about your favorite technical books or which blogs interest you. Try use simple analogies and stay away from technical jargon and concepts. Flask is a micro-framework based on Python to develop web applications.

python interview questions for senior developer

The feedback we get from developer candidates taking our tests is overwhelmingly positive. Web frameworks are also important when it comes to Python. The right Python candidate should possess knowledge of the main web frameworks, object-relational mappers, multi-process architecture, and RESTful APIs.