Cognizant QA Automation Engineer Interview Questions and Answers

Set is an unordered collection of unique elements while list is an ordered collection of elements. Throw is used to throw an exception while throws is used to declare an exception.

• Set does not allow duplicate elements while list can have duplicates.

• Set does not maintain the order of elements while list maintains the order.

• Throw is used to explicitly throw an exception in a method while throws is used to declare the exc...read more

Hard assert is a type of assertion in test automation that stops the test execution immediately when a failure occurs.

• Hard assert is used to validate the expected outcome of a test case

• If the assertion fails, the test execution is halted and marked as failed

• It is commonly used in automated test scripts to ensure the correctness of the application under test

Soft assert is a way to continue the execution of a test case even after an assertion failure.

• Soft assert does not stop the execution of the test case when an assertion fails.

• It is useful when you want to log the failure but continue with the remaining test steps.

• Soft assert is commonly used in test automation frameworks like TestNG in Java.

Program to toggle string

• Create an empty string variable

• Loop through each character in the input string

• If the character is uppercase, convert it to lowercase and add to the new string

• If the character is lowercase, convert it to uppercase and add to the new string

• Return the new string

Program to check if string is number

• Use built-in functions like isdigit() or isnumeric()

• Handle negative numbers and decimal points separately

• Consider edge cases like leading/trailing spaces and exponential notation

Swap two strings without using third

• Use XOR operator

• Use addition and subtraction

• Use multiplication and division

To create an alphanumeric string of a given length, we can use a combination of random letters and numbers.

• Determine the length of the string required

• Create a list of all possible alphanumeric characters

• Randomly select characters from the list and append them to the string until the desired length is reached

A framework is a set of guidelines, standards, and tools used to develop and maintain software applications.

• A framework provides a structure for organizing code and building applications

• It includes pre-written code libraries, modules, and functions that can be reused

• Frameworks can be specific to a programming language or technology

• Examples include Selenium for web testing, Robot Framework for automation testing, and Dj