Westpac Interview Questions, Process, and Tips

Q1. How would you build a high performing REST service, that calls a downstream API meant for "Notification" service? [Hint: Async service calls]
Ans. 
To build a high performing REST service for Notification API calls, use asynchronous service calls.
• Use asynchronous programming techniques like CompletableFuture or reactive programming to make non-blocking service calls.

• Implement circuit breakers and timeouts to handle potential failures and prevent cascading failures.

• Optimize the service by tuning thread pools, connection pools, and caching mechanisms.

• Consider using ...read more
Answered by AI
Add your answer
Q2. How would you test your REST API, while the downstream API that you are calling is not ready for test yet? [Hint: Mocks in Mockito]
Ans. 
Use Mockito to create mock objects for downstream API testing.
• Create a mock object using Mockito for the downstream API

• Define the behavior of the mock object to simulate responses

• Inject the mock object into the test environment to simulate the downstream API calls

• Write test cases to verify the functionality of the REST API using the mock object
Answered by AI
Add your answer

Rest based endpoints was required to be created for some scenario

Q1. OOPS concepts, System design
Add your answer
Q2. Experience and question based on resume
Add your answer

Q1. General questions about salary
Add your answer
Q2. When can I join and culture fitment questions
Add your answer

Q1. Array of integers nums and an integer target, return indices of 2 numbers that they add up to target
Ans. 
Return indices of 2 numbers in an array that add up to a target integer.
• Use a hash table to store the complement of each number in the array.

• Iterate through the array and check if the complement exists in the hash table.

• Return the indices of the two numbers that add up to the target.
Answered by AI
Add your answer
Q2. Given a string, return the longest palindromic substring string
Ans. 
Return the longest palindromic substring of a given string.
• A palindrome is a string that reads the same backward as forward.

• Use dynamic programming to solve the problem efficiently.

• Start with the longest possible substring and check if it's a palindrome.

• If it's not, try the next longest substring until you find a palindrome.

• Return the longest palindrome found.
Answered by AI
Add your answer

Q1. Explain MFE and SPA
Add your answer
Q2. What is different between uncontrolled component and controlled component
Add your answer