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Python Interview Questions
Python Interview Questions
1. What is Python?
Python is a high-level and object-oriented programming language with unified semantics designed primarily for developing apps and the web. It is the core language in the field of Rapid Application Development (RAD) as it offers options such as dynamic binding and dynamic typing.
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2. What are the benefits of Python?
The benefits of Python are as follows:
- Speed and Productivity: Utilizing the productivity and speed of Python will enhance the process control capabilities and possesses strong integration.
- Extensive Support for Libraries: Python provides a large standard library that includes areas such as operating system interfaces, web service tools, internet protocols, and string protocols. Most of the programming tasks are already been scripted in the standard library which reduces effort and time.
- User-friendly Data Structures: Python has an in-built dictionary of data structures that are used to build fast user-friendly data structures.
- Existence of Third Party Modules: The presence of third-party modules in the Python Package Index (PyPI) will make Python capable to interact with other platforms and languages.
- Easy Learning: Python provides excellent readability and simple syntaxes to make it easy for beginners to learn.
3. What are the key features of Python?
The following are the significant features of Python, and they are:
- Interpreted Language: Python is an interpreted language that is used to execute the code line by line at a time. This makes debugging easy.
- Highly Portable: Python can run on different platforms such as Unix, Macintosh, Linux, Windows, and so on. So, we can say that it is a highly portable language.
- Extensible: It ensures that the Python code can be compiled on various other languages such as C, C++, and so on.
- GUI programming Support: It implies that Python provides support to develop graphical user interfaces
4. What type of language is Python? Programming or Scripting?
Python is suitable for scripting, but in general, it is considered a general-purpose programming language.
5. What are the applications of Python?
The applications of Python are as follows:
- GUI based desktop applications
- Image processing applications
- Business and Enterprise applications
- Prototyping
- Web and web framework applications
6. What is the difference between list and tuple in Python?
The difference between tuple and list is as follows:
| List | Tuple |
| The list is mutable (can be changed) | A tuple is immutable (remains constant) |
| These lists performance is slower | Tuple performance is faster when compared to lists |
| Syntax: list_1 = [20, ‘laraonlinetraining’, 30] | Syntax: tup_1 = (20, ‘laraonlinetraining’, 30) |
7. Define PYTHON PATH?
PYTHONPATH is an environmental variable that is used when we import a module. Suppose at any time we import a module, PYTHONPATH is used to check the presence of the modules that are imported in different directories. Loading of the module will be determined by interpreters.
8. Define modules in Python?
The module is defined as a file that includes a set of various functions and Python statements that we want to add to our application.
Example of creating a module:
In order to create a module first, we need to save the code that we want in a file with .py extension.
Save the module with module.py
def wishes(name):
Print("Hi, " + name)9. What are the built-in types available in Python?
The built-in types in Python are as follows:
- Integer
- Complex numbers
- Floating-point numbers
- Strings
- Built-in functions
10. How do we find bugs and statistical problems in Python?
We can detect bugs in python source code using a static analysis tool named PyChecker. Moreover, there is another tool called PyLint that checks whether the Python modules meet their coding standards or not.
11. What is the difference between .py and .pyc files?
py files are Python source files. .pyc files are the compiled bytecode files that are generated by the Python compiler
12. How do you invoke the Python interpreter for interactive use?
By using python or python x. y we can invoke a Python interpreter. where x.y is the version of the Python interpreter.
13. How do you create a Python function?
Functions are defined using the def statement.
An example might be def foo(bar):
14. Define iterators in Python?
In Python, an iterator can be defined as an object that can be iterated or traversed upon. In another way, it is mainly used to iterate a group of containers, elements, the same as a list.
15. How does a function return values?
Functions return values using the return statement.
16. Define slicing in Python?
Slicing is a procedure used to select a particular range of items from sequence types such as Strings, lists, and so on.
17. How can Python be an interpreted language?
As in Python the code which we write is not machine-level code before runtime so, this is the reason why Python is called an interpreted language.
18. What happens when a function doesn’t have a return statement? Is this valid?
Yes, this is valid. The function will then return a None object. The end of a function is defined by the block of code that is executed (i.e., the indenting) not by any explicit keyword.
19. Define package in Python?
In Python packages are defined as the collection of different modules.
20. How can we make a Python script executable on Unix?
In order to make a Python script executable on Unix, we need to perform two things. They are:
Script file mode must be executable and
The first line should always begin with #.
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