Extended Web AppTech Senior Quality Engineer Interview Questions and Answers

To determine if a number is a Fibonacci number or not.

• Check if 5*n^2 + 4 or 5*n^2 - 4 is a perfect square

• If either of the above conditions is true, the number is a Fibonacci number

• Example: 5 is a Fibonacci number as 5*5 - 4 = 21 which is a perfect square

Implement caching by storing frequently accessed data in memory to improve response time.

• Identify frequently accessed data that can be cached

• Choose an appropriate caching strategy (e.g. in-memory caching, distributed caching)

• Implement caching mechanisms such as Redis or Memcached

• Set expiration policies for cached data to ensure freshness

• Monitor cache performance and adjust as needed