CONTUS – Python Interview Questions
Here is the list of Python Interview Questions which are recently asked in Contus company. These questions are included for both Freshers and Experienced professionals. Our Python Training has Answered all the below Questions.
1. What are the key features of Python?
- Easy to Use, Read, Write
- Free and Open Source
- Object-Oriented and High Level Programming
- GUI Programming Support with Extensible features
- Portable and Integrated language
2. What type of language is python? Programming or scripting?
Python is considered a scripting language because of a historical blur between scripting languages and general purpose programming languages. In fact, Python is not a scripting language, but a general purpose programming language that also works nicely as a scripting language.
It is also an interpreted and high-level programming language for the purpose of general programming requirements.
3. How is Python an interpreted language?
Python is called an interpreted language because it goes through an interpreter, which turns code you write into the language understood by your computer's processor.
4. What is pep 8?
PEP stands for Python Enhancement Proposal which is a design document that provides guidelines and best practices on how to write Python code. The primary focus of PEP 8 is to improve the readability and consistency of Python code.
5. How is memory managed in Python?
Memory management in Python involves a private heap containing all Python objects and data structures. The management of this private heap is ensured internally by the Python memory manager.
The Python memory manager has different components which deal with various dynamic storage management aspects, like sharing, segmentation, reallocation or caching.
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6. What is PYTHON PATH?
PYTHONPATH is an environment variable which the user can set to add additional directories that the user wants Python to add to the sys. Path directory list. ... So, when you import modules in your Python scripts, PYTHONPATH is also checked to see which directories might contain the imported module
7. What are local variables and global variables in PLocal variable is declared inside a function whereas Global variable is declared outside the function. Local variables are created when the function has started execution and are lost when the function terminates, on the other hand, Global variable is created as execution starts and is lost when the program ends.
8. What is type conversion in Python?
Type Conversion is the conversion of object from one data type to another data type. Implicit Type Conversion is automatically performed by the Python interpreter. Python avoids the loss of data in Implicit Type Conversion.
9. What do you understand by the term PEP 8?
PEP-8, is a document that provides guidelines and best practices on how to write Python code. It was written in 2001 by Guido van Rossum, Barry Warsaw, and Nick Coghlan. PEP stands for Python Enhancement Proposal, and there are several of them.
10. What are Python Decorators?
Decorators are very powerful and useful tool in Python since it allows programmers to modify the behaviour of function or class. Decorators allow us to wrap another function in order to extend the behaviour of the wrapped function, without permanently modifying it.
11. Define String in Python?
String is array of sequenced characters and is written inside single quotes, double quotes or triple quotes. Also, Python doesn't have character data type, so when we write 'a', it is taken as a string with length 1.
12. How does a function return values?
A return statement is used to end the execution of the function call and “returns” the result (value of the expression following the return keyword) to the caller. The statements after the return statements are not executed.
13. Define package in Python?
Packages are a way of structuring Python's module namespace by using “dotted module names”. Suppose you want to design a collection of modules (a “package”) for the uniform handling of sound files and sound data.
14. What is the difference between Python Arrays and lists?
Arrays can store data very compactly and are more efficient for storing large amounts of data. Arrays are great for numerical operations; lists cannot directly handle math operations.
For example, you can divide each element of an array by the same number with just one line of code.
15. What are functions in Python?
When the task is carried out, the function can or can not return one or more values. There are three types of functions in Python: Built-in functions, such as help() to ask for help, min() to get the minimum value, print() to print an object to the terminal
16. What is __init__?
__init__ is one of the reserved methods in Python. In object oriented programming, it is known as a constructor. The __init__ method can be called when an object is created from the class, and access is required to initialize the attributes of the class.
17. What is a lambda function?
The lambda keyword is used to define an anonymous function in Python. It has the following syntax: Syntax: lambda arguments: expression. This function can have any number of arguments but only one expression, which is evaluated and returned.
18. What is self in Python?
In Python, the word self is the first parameter of methods that represents the instance of the class. Therefore, in order to call attributes and methods of a class, the programmer needs to use self.
19. How do you write comments in python?
Single line Python comments are marked with # character. These comments end at the end of the physical line, which means that all characters starting after the # character (and lasts till the end of the line) is part of the comment.
20. What is pickling and unpickling?
“Pickling” is the process whereby a Python object hierarchy is converted into a byte stream and “unpickling” is the inverse operation, whereby a byte stream (from a binary file or bytes-like object) is converted back into an object hierarchy.
21. What are the generators in python?
Generators are basically something in Python that produces a sequence of values. 00:21 that sequence could be a sequence of integers, floats, strings, Booleans—a sequence of any type of value.
22. When would you use triple quotes as a delimiter?
Python's triple quotes comes to the rescue by allowing strings to span multiple lines, including verbatim NEWLINEs, TABs, and any other special characters. The syntax for triple quotes consists of three consecutive single or double quotes.
23. How to remove values from a Python array?
Removing Python Array Elements
we can delete one or more items from an array using Python's del statement. We can use the remove() method to remove the given item, and pop() method to remove an item at the given index.
24. How do we reverse a list in Python?There are three ways to reverse a list in Python.
- List reverse() function.
- Using Slicing.
- Built-in reversed() function.
25. How do Python arrays and lists differ from each other?
Lists and arrays are used in Python to store data(any data type- strings, integers etc), both can be indexed and iterated also. ... Arrays need to be declared whereas lists do not need declaration because they are a part of Python's syntax. This is the reason lists are more often used than arrays
26. How can we handle URLs in Django?
Django runs through each URL pattern, in order, and stops at the first one that matches the requested URL, matching against path_info . Once one of the URL patterns matches, Django imports and calls the given view, which is a Python function (or a class-based view).
TOP MNC's PYTHON INTERVIEW QUESTIONS & ANSWERS
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