Cognizant AWS Cloud Engineer Interview Questions and Answers for Experienced

Triggers are database objects that automatically execute in response to certain events or changes in data.

• Triggers are used to enforce business rules or data integrity.

• They can be used to audit changes to data.

• Triggers can be set to execute before or after an event, such as an insert, update, or delete operation.

• They can be defined on tables, views, or schemas.

• Examples of triggers include sending an email notification ...read more

Quicksort has an average and best-case time complexity of O(n log n) and worst-case of O(n^2).

• Quicksort is a divide-and-conquer algorithm that recursively partitions an array into two sub-arrays based on a pivot element.

• The average and best-case time complexity is O(n log n) because each partition divides the array into roughly equal halves.

• The worst-case time complexity is O(n^2) when the pivot element is the smallest...read more