Python Interview Questions For Automation Testing are covered in this post.
Python Interview Questions For Automation Testing
Table of Contents
What is Python?
Python is a high-level, interpreted, and general-purpose dynamic programming language that focuses on code readability.
What is a dynamically typed language?
In a dynamically typed language, like Python, you don’t have to declare the data type of a variable.
What is an Interpreted language?
An interpreted language is one where the instructions are not directly executed by the target machine, but instead read and executed by some other program (which can be written in the language of the native machine).
What is the difference between list and tuples in Python?
Lists are mutable i.e they can be edited, while Tuples are immutable (they cannot be edited).
What are the basic Data Types Supported by Python?
Python supports various data types like Integer, Float, String, List, Tuple, Set, Dictionary etc.
How do you check whether the two variables are pointing to the same object in Python?
We can use the “is” operator to check if two variables are pointing to the same object.
What are the differences between CI, CD, and CT in the context of automation testing?
CI stands for Continuous Integration, CD stands for Continuous Delivery or Continuous Deployment, and CT stands for Continuous Testing. They are practices that are applied in software delivery and development processes to catch bugs and issues early.
What is automated testing and how does it help in the testing process?
Automated testing involves using scripts and software to perform test cases on an application. It helps in increasing the efficiency of the testing process, reducing human error, and allowing for continuous testing.
What are some of the Python libraries used in automation testing?
Selenium, Pytest, Robot Framework, and unittest are some of the Python libraries used in automation testing.
What are the key features of Python that make it suitable for automation testing?
Python’s simplicity, readability, robust testing framework, and ease of integration with other languages and tools make it suitable for automation testing.
What is Selenium? How does it interact with Python?
Selenium is a popular open-source web testing tool. It provides a simple API to write functional/acceptance tests using Selenium WebDriver. Through Selenium Python API, you can access all functionalities of Selenium WebDriver in an intuitive way.
What is PyTest?
PyTest is a kind of testing framework which allows us to write test codes using Python. You can write code to test anything like database, API, even UI if you want.
How do you handle exceptions in Python?
Exceptions in Python can be handled using a try..except statement. The code that can cause an exception to occur is put in the “try” block and the handling of the exception is then implemented in the “except” block of code.
What is the difference between deep and shallow copy?
Shallow copy is used when a new instance type gets created and it keeps the values that are copied in the new instance. Deep copy is used to store the values that are already copied. Deep copy doesn’t copy the reference pointers to the objects.
What is a lambda function in Python?
A lambda function is a small anonymous function. Lambda functions can take any number of arguments but can only have one expression.
What is unit testing in Python?
Unit testing is a method of software testing that checks whether the individual parts of source code are working correctly. Python’s unittest module, sometimes referred to as ‘PyUnit’, is based on the XUnit framework design by Kent Beck and Erich Gamma.
What is the use of “assert” statements in Python?
Assert statements are a debugging aid that tests a condition. If the condition is true, it does nothing and your program just continues to execute. But if the assert condition evaluates to false, it raises an AssertionError exception with an optional error message.
What are decorators in Python?
Decorators allow us to wrap another function in order to extend the behavior of the wrapped function, without permanently modifying it.
What is pickling and unpickling in Python?
Pickling is a process where a Python object hierarchy is converted into a byte stream, and Unpickling is the inverse operation, where a byte stream is converted back into an object hierarchy.
What is the difference between a list and a dictionary?
A list is an ordered collection of elements enclosed within square brackets, whereas a dictionary is an unordered collection of key-value pairs enclosed within curly braces.
What is the use of “with” statement in Python?
The “with” statement in Python is used in exception handling to make the code cleaner and much more readable. It simplifies the management of common resources like file streams.
What is the difference between “==” and “is” operator in Python?
“==” checks if the values of two operands are equal or not, while “is” checks whether both the operands refer to the same object or not.
What is Monkey Patching in Python?
Monkey Patching is the dynamic modification of a module or class at runtime. It’s often used to modify or extend third-party libraries or even built-in modules, without having to touch their source code.
How do you debug a program in Python? Is it possible to step through Python code?
Yes, Python has a debugger which is available as a module called pdb (Python DeBugger). It supports setting conditional breakpoints, stepping through the code, inspecting stack frames, and more.
Explain how multithreading is achieved in Python?
Multithreading in Python can be achieved using the threading module. However, due to the Global Interpreter Lock (GIL) in Python, multithreading does not necessarily lead to improved performance.
What is Flask?
Flask is a web framework in Python. It’s a Python module that lets you develop web applications easily. It has a small and easy-to-extend core.
What is a negative index in Python?
Negative indexing in Python means access from the end. For example, -1 refers to the last item, -2 refers to the second last item, and so on.
What is the difference between a module and a package in Python?
A module is a single file (or files) that are imported under one import and used. A package is a collection of modules in directories that give a package hierarchy.
What is ‘self’ in Python?
‘self’ is an instance or an object of a class. In Python, ‘self’ is explicitly used as the first parameter to define an instance method.
What is PEP8?
PEP8 is a coding convention, a set of recommendation, about how to write your Python code more readable.
What is the role of ‘fixtures’ in Pytest?
Fixtures in Pytest are a set of predefined objects or states that are used as a baseline for running tests. Their main purpose is to provide a fixed baseline so that tests execute reliably and produce consistent results, which is critical when we write automated tests for a regression suite.