Optimum Infosystem Senior Test Engineer Interview Questions and Answers

Our Automation Framework is organized in a modular and scalable way.

• We use a Page Object Model design pattern

• We have separate modules for test data, test scripts, and test reports

• We use a central configuration file for easy maintenance

• We have a library of reusable functions

• We use version control to manage changes

• We have a clear naming convention for easy identification

Hashtable is synchronized while hashmap is not.

• Hashtable is thread-safe while hashmap is not.

• Hashtable does not allow null keys or values while hashmap allows one null key and multiple null values.

• Hashtable is slower than hashmap due to synchronization.

• Hashtable is a legacy class while hashmap is a newer implementation.

Hashmap is not thread-safe while Concurrent Hashmap is thread-safe.

• Hashmap is not suitable for multi-threaded environments as it can lead to race conditions and data inconsistencies.

• Concurrent Hashmap allows multiple threads to access and modify the map concurrently without any data inconsistencies.

• Concurrent Hashmap uses a technique called lock striping to achieve thread-safety.

• Concurrent Hashmap is slower than Hashma...read more

Implement merge sort and find kth largest element in an array.

• Merge sort is a divide and conquer algorithm that recursively divides the array into two halves, sorts them and then merges them.

• Kth largest element can be found using quick select algorithm or by sorting the array and returning the kth element from the end.

• Merge sort has a time complexity of O(nlogn) and space complexity of O(n).

• Quick select has a time comp...read more

UI Automation Framework is a tool that automates the testing of user interfaces.

• It allows testers to write scripts that simulate user actions on the UI.

• It can be used for functional testing, regression testing, and performance testing.

• Examples include Selenium, Appium, and TestComplete.

API status codes and HTTP methods are important for testing APIs.

• API status codes indicate the success or failure of an API request.

• HTTP methods include GET, POST, PUT, DELETE, PATCH, and more.

• Testing API status codes and HTTP methods ensures proper functionality and error handling.

• Examples of status codes include 200 (OK), 404 (Not Found), and 500 (Internal Server Error).

• Examples of HTTP methods include GET (retrieve ...read more