30+ Python Automation Engineer Interview Questions and Answers

Python program to find the largest number from a list of numbers in string format.

• Convert the list of strings to a list of integers

• Sort the list in descending order

• Join the sorted list of integers into a single string

To write test cases, identify scenarios, create test data, and execute tests. For data operations on list & dict, use built-in functions.

• For test cases, identify positive and negative scenarios, boundary conditions, and edge cases.

• Create test data that covers all possible scenarios and edge cases.

• Use assert statements to verify expected results.

• For data operations on list & dict, use built-in functions like append(), pop(), keys(), values(), etc.

• Perform operations like sortin...read more

Python program to print prime numbers between 1 to 100

• Loop through numbers 1 to 100

• Check if number is prime using modulus operator

• Print the prime numbers

Reverse string without slicing, find missing numbers, sort list without sorting method

• To reverse a string without slicing, you can use a loop to iterate through the characters and build a new string in reverse order.

• To find missing numbers in a list, you can iterate through the list and check for gaps between consecutive numbers.

• To sort a list in ascending order without using sorting method, you can implement a sorting algorithm like bubble sort or insertion sort.

Selenium is a popular open-source automation tool used for web application testing.

• Selenium is used for automating web browsers.

• It supports multiple programming languages including Python.

• Selenium WebDriver is used to interact with web elements.

• It can simulate user actions like clicking, typing, etc.

• Selenium Grid allows parallel execution on multiple machines.

• Selenium IDE is a record and playback tool for creating test cases.

Find the 2nd maximum number from a list.

• Sort the list in descending order and return the second element.

• Use a loop to iterate through the list and keep track of the two largest numbers.

• Convert the list to a set to remove duplicates, then find the second largest number.

The input is checked for order and the result is printed as true or false.

• Check if the input is ordered by comparing opening and closing brackets

• Use a stack to keep track of opening brackets

• If a closing bracket is encountered, pop the top element from the stack and check if it matches the closing bracket

• If the stack is empty at the end, the input is ordered

I have worked with various Python libraries for automation, enhancing efficiency in tasks like web scraping, testing, and data manipulation.

• Selenium: A powerful tool for automating web browsers, allowing for tasks like web scraping and automated testing of web applications.

• Beautiful Soup: A library for parsing HTML and XML documents, making it easy to extract data from web pages.

• Pandas: A data manipulation library that provides data structures and functions to efficiently han...read more

BGP (Border Gateway Protocol) is a routing protocol used to exchange routing information between different autonomous systems on the internet.

• BGP is used to make routing decisions based on network policies, rules, and paths.

• It is a path vector protocol that uses TCP for reliable communication.

• BGP routers exchange routing information through BGP messages.

• BGP helps in determining the best path for data to travel across the internet.

• Example: BGP is commonly used by Internet Serv...read more

Creating a library in Python involves structuring code, writing documentation, and packaging for distribution.

• Define the Purpose: Clearly outline what functionality your library will provide, e.g., a library for data analysis.

• Organize Code: Structure your code into modules and packages. For example, create a folder named 'mylibrary' with __init__.py.

• Write Documentation: Use docstrings to document functions and classes. Consider using tools like Sphinx for generating documenta...read more

The code snippet prints the reverse of a given string using a for loop.

• Initialize an empty string to store the reversed string.

• Iterate through each character in the original string using a for loop.

• Append each character to the beginning of the reversed string.

• Print the reversed string.

Web application testing is the process of evaluating the functionality, usability, and security of a web application.

• It involves testing the application's features, such as forms, navigation, and user interactions.

• It also includes checking for compatibility across different browsers and devices.

• Security testing is crucial to identify vulnerabilities and protect against attacks.

• Performance testing ensures the application can handle expected user load.

• Examples: testing an e-com...read more

Transit gateway is a centralized hub for connecting multiple VPCs, while edge gateway is a device that connects a local network to a cloud network.

• Transit gateway is used to connect multiple VPCs within the same region or across different regions, providing a centralized hub for routing traffic.

• Edge gateway is a device that connects a local network to a cloud network, typically used for secure connectivity and data transfer.

• Transit gateway offers advanced features like route ...read more

Implement a sorting algorithm to sort an unsorted array of strings without using inbuilt methods.

• Use a sorting algorithm like bubble sort, selection sort, or insertion sort to manually sort the array.

• Compare each element with the next one and swap them if they are in the wrong order.

• Repeat this process until the array is sorted.

• Example: ['banana', 'apple', 'cherry'] -> ['apple', 'banana', 'cherry']

To check if an IP address is correct, validate the format and range of each octet.

• Check if the IP address has 4 octets separated by periods.

• Validate each octet to be between 0 and 255.

• Ensure there are no leading zeros in each octet.

• Use regular expressions for pattern matching.

• Consider using built-in libraries like ipaddress in Python.

A dict in Python is an unordered collection of key-value pairs.

• Dicts are enclosed in curly braces {}

• Each key-value pair is separated by a colon :

• Keys must be unique and immutable (strings, numbers, or tuples)

• Values can be of any type and can be duplicated

• Dicts are mutable and can be modified by adding, updating, or deleting key-value pairs

ARP stands for Address Resolution Protocol, used to map IP addresses to MAC addresses. DHCP stands for Dynamic Host Configuration Protocol, used to assign IP addresses to devices on a network.

• ARP is used to find the MAC address of a device based on its IP address

• DHCP is used to automatically assign IP addresses to devices on a network

• ARP is a layer 2 protocol, while DHCP is a layer 3 protocol

• Example: When a device wants to communicate with another device on the same network, ...read more

Dunder method refers to special methods in Python that start and end with double underscores (__).

• Dunder methods are also known as magic methods or special methods.

• They are used to define behavior for built-in operations in Python, such as addition, subtraction, comparison, etc.

• Examples of dunder methods include __init__ for object initialization, __add__ for addition, __str__ for string representation, etc.

Query to find the second highest salary in a SQL database table.

• Use the ORDER BY clause to sort the salaries in descending order.

• Use the LIMIT clause to limit the result to the second row.

• Consider handling cases where there might be ties for the highest salary.

A decorator is a design pattern in Python that allows a user to add new functionality to an existing object or function.

• Decorators are denoted by the @ symbol followed by the name of the decorator function.

• They are used to modify the behavior of the decorated object or function without directly changing its source code.

• Decorators can be used for adding logging, timing, caching, authentication, and other cross-cutting concerns to functions or classes.

• They can be applied to fun...read more

Technicality refers to the detailed and specific aspects of a subject or process.

• Technicality involves understanding the intricacies and complexities of a system or concept.

• It often requires specialized knowledge or expertise to navigate technicalities effectively.

• In the context of automation engineering, technicality may involve understanding the intricacies of programming languages and frameworks.

• Being familiar with technicalities can help in troubleshooting and problem-sol...read more

Generate and print a random IP address.

• Use the random module to generate random numbers for each octet of the IP address.

• Ensure that the generated IP address is valid by checking that each octet is within the range of 0-255.

• Join the octets together with periods to form the complete IP address.

• Print the generated IP address.

Lists and tuples are both sequence data types in Python, but they have some key differences.

• Lists are mutable, meaning their elements can be changed, added, or removed.

• Tuples are immutable, meaning their elements cannot be changed once defined.

• Lists use square brackets [], while tuples use parentheses ().

• Lists are typically used for collections of similar items, while tuples are used for heterogeneous data.

• Lists have more built-in methods and are generally more flexible than ...read more

Automating interactions with a random website using Python can streamline tasks and enhance efficiency.

• Use libraries like Selenium or Requests for web automation.

• Selenium can simulate user actions like clicking buttons and filling forms.

• Example: `driver.get('http://example.com')` to navigate to a website.

• Use BeautifulSoup for parsing HTML content after fetching it.

• Example: `soup = BeautifulSoup(response.text, 'html.parser')` to extract data.

Pytest fixtures provide a way to set up and tear down test environments, enhancing test modularity and reusability.

• Fixtures are defined using the @pytest.fixture decorator.

• They can be used to set up test data or state before tests run.

• Fixtures can be scoped to function, class, module, or session.

• Example: @pytest.fixture def sample_fixture(): return 'data'

• Fixtures can be injected into test functions as parameters.

Inheritance is a concept in object-oriented programming where a class inherits properties and behaviors from another class.

• Inheritance allows code reuse and promotes modularity.

• The class that is being inherited from is called the parent class or base class.

• The class that inherits from the parent class is called the child class or derived class.

• The child class can access all the public and protected members of the parent class.

• In Python, inheritance is implemented using the 'c...read more

Reverse a given string

• Use string slicing with a step of -1 to reverse the string

• Alternatively, use the built-in 'reversed' function to reverse the string