Key to the success of grid computing is a(n) _____ that acts as a grid leader and traffic monitor.

________ perform arithmetic operations, such as calculating averages and totals, on records displayed in a table or query

A) Special operators B) Comparison operators C) Aggregate functions D) Is Null criteria

If a queue charQueue contains the following elements:

(rear) * ; p & (front) what will the contents of charQueue be after the following segment of code executes: charQueue.push (h); charQueue.pop(); char ch = charQueue.top(); a) * ; p b) * ; & h c) h * ; p d) h * ;