Nippon Data Systems Senior QA Engineer Interview Questions and Answers

Hacker rank test based on python and selenium along with a python programming question

Q1. Explain oops concept and where do you use it in your automation project
Ans. 
OOPs concept refers to Object-Oriented Programming principles like inheritance, encapsulation, polymorphism, and abstraction.
• Inheritance: Reusing code and creating a hierarchy of classes

• Encapsulation: Hiding the internal implementation details of a class

• Polymorphism: Ability to use a single interface for different data types or objects

• Abstraction: Showing only necessary details and hiding unnecessary details
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Q2. What is synchronisation and how do we handle it
Ans. 
Synchronization is the coordination of multiple processes to ensure they work together effectively.
• Synchronization is important in multi-threaded applications to prevent race conditions and ensure data consistency.

• We can handle synchronization using techniques like locks, semaphores, and monitors.

• For example, in Java, we can use synchronized keyword or ReentrantLock class to achieve synchronization.

• Another example is u...read more
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Q1. Coding question find the frequency of characters
Ans. 
Find the frequency of characters in an array of strings.
• Iterate through each string in the array

• For each character in the string, increment its count in a hashmap

• Return the hashmap with character frequencies
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Q2. Robot framework and pytest differences
Ans. 
Robot framework is keyword-driven, while pytest is a full-featured testing framework.
• Robot framework is based on keywords and test cases are written in tabular format, while pytest is a full-featured testing framework with fixtures, asserts, and plugins.

• Robot framework has built-in libraries for various tasks like file operations, database interactions, etc., while pytest relies on external libraries for such functiona...read more
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