Which of the following applications can be efficiently managed by a queue data structure?Call center phone systemsDepth-first search in a graphUndo operations in a text editorBinary search in a sorted array

The application that can be efficiently managed by a queue data structure is "Call center phone systems".

Here's why:

1. Call center phone systems: In a call center, calls are typically handled in the order they are received. This is a perfect example of a queue data structure, which follows the First In, First Out (FIFO) principle. The first call to arrive is the first one to be answered.

2. Depth-first search in a graph: This is typically implemented using a stack, not a queue. Depth-first search goes as far as possible along each branch before backtracking, which is a Last In, First Out (LIFO) process.

3. Undo operations in a text editor: This is also typically implemented using a stack. The most recent action is the first one to be undone, which is a LIFO process.

4. Binary search in a sorted array: This doesn't typically use a queue or a stack. It works by repeatedly dividing the array in half until the desired value is found.