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In C programming, two-way communication can be implemented using message queues by following these steps:

1. Create two message queues, one for sending messages from the sender process to the receiver process and the other for sending messages from the receiver process to the sender process.

2. In the sender process, send messages to the receiver process by using the message queue for sending messages from the sender process to the receiver process.

3. In the receiver process, wait for messages from the sender process by using the message queue for receiving messages from the sender process.

4. Once a message has been received, process it according to the instructions given in the message.

5. If the receiver process needs to send a message back to the sender process, it can do so by using the message queue for sending messages from the receiver process to the sender process.

6. The sender process can wait for messages from the receiver process by using the message queue for receiving messages from the receiver process.

7. Once a message has been received, process it according to the instructions given in the message.

8. Repeat steps 2-7 until the two processes have completed their interaction.

By following these steps, two-way communication can be implemented using message queues in C programming.