Which statement is true regarding the efficiency of transaction processing systems?

Transaction processing systems are specifically designed to handle a certain type of transaction efficiently, which is why the statement regarding their focus on specific types of transactions is true. These systems are tailored to process large volumes of similar transactions, such as sales transactions in retail or banking transactions in financial services. This specialization enables them to streamline the processing and ensures consistency and reliability in the handling of those transactions.

The emphasis on specific types of transactions means that these systems can implement optimized transaction protocols, ensuring rapid response times and accurate data management, which is crucial for maintaining operational efficiency. Their architecture is generally built around the nature of the transactions they are designed to process, enhancing their overall performance and efficiency in those specific areas.

In contrast, while other statements touch on aspects of transaction processing systems, they do not universally apply to the efficiency of these systems in the same way. Command processing and batch modes can be features of some systems but are not defining characteristics of all transaction processing systems. Real-time operation is also an element that can vary depending on the specific implementation and requirements of the system. Thus, the statement about being designed for specific types of transactions captures the essence of how these systems operate effectively.