Pegasystems Applications Engineer Interview Questions and Answers

Design data structure for Excel sheet

• Use a 2D array to represent rows and columns

• Each cell can contain a string or a formula

• Include metadata such as cell formatting and data validation rules

Monitors are implemented in OS to synchronize access to shared resources.

• Monitors are used to ensure mutual exclusion and synchronization of shared resources.

• They are implemented using locks and condition variables.

• Monitors provide a higher level of abstraction than locks and semaphores.

• Examples of monitors in OS include Java's synchronized keyword and C#'s lock statement.

To delete nth node in a linked list, we need to traverse to the (n-1)th node and change its next pointer to (n+1)th node.

• Traverse to (n-1)th node and change its next pointer to (n+1)th node

• Handle edge cases like deleting the first node or deleting the last node

• Free the memory of the deleted node

Creating a pointer for an abstract class and pointing it to a derived class object with a function name conflict.

• Use virtual keyword for the function in the abstract class.

• Use override keyword for the function in the derived class.

• Access the function using the pointer with the derived class object.