Question:
Sometimes, on calling a customer service center, the Interactive Voice Response System (IVRS) tells us to wait till a support person is available. Which data structure this application is of?
Sometimes, on calling a customer service center, the Interactive Voice Response System (IVRS) tells us to wait till a support person is available. Which data structure this application is of?
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Whenever you encounter waiting lines, buffering, print spooling, or task scheduling, the underlying data structure is a Queue.
Updated On: Sep 7, 2026
- Enqueue
- Binary Tree
- Stack
- Queue
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The Correct Option is D
Solution and Explanation
Concept:
Real-world waiting lines where the earliest arriving participant is served first operate under the First-In-First-Out (FIFO) paradigm.
In computer science, this scheduling policy is implemented using a Queue data structure.
Step 1: Analyzing the Call Center IVRS Mechanism:
When multiple customers call customer support, agents can only assist one person at a time.
Callers who arrive while all agents are busy are placed on hold in a waiting line.
The caller who has been waiting the longest (arrived first) is connected to the next available agent.
This directly implements First-In-First-Out (FIFO) order: the first call entering the queue is the first one attended to.
Step 2: Evaluating the Options:
- Queue: The data structure that stores items in FIFO order.
- Stack: A LIFO structure where the newest caller would be answered first, which is unfair for customer support.
- Binary tree: A hierarchical structure used for searching or sorting, not linear waiting queues.
- Enqueue: The operation of adding an element to a queue, not a data structure itself.
Final Answer:
The waiting line system in IVRS is an application of a Queue. Thus, option (D) is the correct answer.
Real-world waiting lines where the earliest arriving participant is served first operate under the First-In-First-Out (FIFO) paradigm.
In computer science, this scheduling policy is implemented using a Queue data structure.
Step 1: Analyzing the Call Center IVRS Mechanism:
When multiple customers call customer support, agents can only assist one person at a time.
Callers who arrive while all agents are busy are placed on hold in a waiting line.
The caller who has been waiting the longest (arrived first) is connected to the next available agent.
This directly implements First-In-First-Out (FIFO) order: the first call entering the queue is the first one attended to.
Step 2: Evaluating the Options:
- Queue: The data structure that stores items in FIFO order.
- Stack: A LIFO structure where the newest caller would be answered first, which is unfair for customer support.
- Binary tree: A hierarchical structure used for searching or sorting, not linear waiting queues.
- Enqueue: The operation of adding an element to a queue, not a data structure itself.
Final Answer:
The waiting line system in IVRS is an application of a Queue. Thus, option (D) is the correct answer.
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