Table of Contents [show]
Here is a list of the
25 most frequently asked Python
interview questions. These questions includes the python interview questions for basics and python questions for coding.
1. What are pickling and unpickling?
The pickle module
accepts any Python object, converts it to a string representation, and dumps it
to a file using the dump function. This process is called pickling. While the
process of retrieving native Python objects from a stored string representation
is called unpickling.
2. How is Python interpreted?
Python is an
interpreted language. A Python program executes straight from the source code.
It converts the source code written by the programmer into an intermediate
language, which is again translated into the machine language to be executed.
3. How is memory managed in Python?
Python's memory is
managed by Python's private heap space. All Python objects and data structures
reside on a private heap. The programmer does not have credentials to this
private heap, and the interpreter takes care of this private Python heap.
The Python memory
manager does the distribution of Python heap space for Python objects. The base
API provides access to some tools that the programmer can code.
Python also has a
built-in trash collector that reclaims all unused memory, releases it, and
makes it available to the heap space.
4. What tools help to find errors or conduct the static analysis?
PyChecker is a static
investigation tool that detects errors in Python source code and warns about
the style and complexity of the error. Pylint is another tool that verifies
that a module meets a coding standard.
5. What are Python decorators?
A Python decorator is
a specific change we make to the Python syntax to easily change functions.
6. What is the dissimilarity between a list and a tuple?
The dissimilarity
between a list and a tuple is that a list is mutable while a tuple is not. For
example, a tuple can be hashed as a key for dictionaries.
7. How are arguments passed by value or reference?
In Python, everything
is an object, and all variables contain references to objects. Reference values are according to functions. Therefore, the value of links cannot be changed.
However, you can change things if it is mutable.
8. What are Dict and List comprehensions?
They are syntactic
constructs that facilitate the creation of a dictionary or list based on
existing tables.
9. What built-in type does Python provide?
Python provides two
built-in types:
Variable built-in
types are:
Mutable built-in
types are:
" List
" Sets
" Dictionaries
" Immutable built-in types
" Strings
" Tuples
" Numbers
Immutable built-in types are:
" Strings
" Tuples
" Numbers
10. Explain namespace in Python
Every name introduced
in Python has a place where it lives and can be hung. This is known as a
namespace. It's like a box with a variable name mapped to an object. This field
will be examined whenever the variable is searched to retrieve the matching thing.
11. What is lambda in Python?
This anonymous,
single-expression function is often used as an inline function.
12. Why don't lambda forms in Python have statements?
The lambda form in
Python has no statements because it is used to create new function objects and
then return them at runtime.
13. Explain traversal in Python
Pass means a
non-functional Python statement; in other words, it is a placeholder in a
compound statement where a blank space should be left, and nothing needs to be
written there.
14. Explain Arithmetic operators
Arithmetic Operators
conduct different computations like addition, subtraction, multiplication,
division, exponent, etc. There are other techniques for arithmetic computation
in Python; you can use the eval function, declare variables & calculate, or
call functions.
15. What is a unit test in Python?
The unit testing
framework in Python is known as a unit test. It supports sharing settings, test
automation, code to disable tests, aggregation of tests into collections, etc.
16. Explain slicing in Python?
The mechanism for
selecting various items from sequence types such as lists, tuples, strings,
etc., is called slicing.
17. What are generators in Python?
The way iterators are
implemented is called generators. Besides, it is a standard function that
returns an expression within a function.
18. What is docstring in Python?
Python's
documentation string is known as the docstring. It is a method of documenting
Python functions, modules, and classes.
19. What are all dictionary methods:
Here is the list of
dictionary methods:
" copy()
" update()
" items()
" sort()
" len()
" cmp()
" Str()
20. What is a negative index in Python?
Python successions
can be indexed in positive and negative. 0 is the first index for a positive
index, 1 is the second, and so on. For a negative index, (-1) is the last
index, (-2) is the penultimate index, etc.
21. How can you convert a number to a string?
To convert a number
to a string, use the str() built-in function. If you want an octal or
hexadecimal representation, use the oct() or hex() built-in functions.
22. What is the difference between xrange and range?
Xrange returns a
range object, while range returns a list and uses the same memory regardless of
the size of the range.
23. What are typical examples of exceptions in Python?
Typical examples of
exceptions in Python are:
" Division by zero
" Accessing a file that does not exist.
" Adding two incompatible types
" An endeavor was made to access a non-existent
sequence index
" Removing a table from a separate database
server.
" ATM withdrawal higher than the available
amount
24. Explain the significant bugs of Python
Notable Python errors
are 1) ArithmeticError, 2) ImportError, and 3) IndexError.
ArithmeticError: ArithmeticError acts as the base class for all
arithmetic exceptions. It is raised due to errors in arithmetic operations.
ImportError: An import error is thrown when you try to import a module that does
not exist. This kind of exception occurs if you made a mistake in the module
name or a module not present in the standard path.
IndexError:
An IndexError is thrown when attempting to reference a sequence that is out of
range.
25. How can you share global variables across modules?
Create a specific
module to share global variables between modules within a single program.
Import the configuration module into all modules of your application. The module
will be unrestricted as a global variable across modules.
Conclusion
Interview questions
are crucial to preparing for the dream role you've always wanted. In this blog,
we have seen 25 top Python interview
questions and their relevant answers.
We hope that this
blog helps you to learn in your journey to learn.
