On-line real time systems become popular in                               generation?

The correct answer is Third because the integration of silicon integrated circuits (ICs) during the third generation of computing provided the processing speed and memory management needed to handle real-time transaction tracking.

• Step 1 (Evolutionary Context): First and second-generation systems relied heavily on sequential batch processing, where programs were queued up and executed as a single slow block.
• Step 2 (Technical Advancement): Third-generation computing (mid-1960s to early 1970s) introduced advanced multiprogramming capabilities, text terminal interfaces, and magnetic disk storage. These features allowed systems to receive, process, and update data instantly—giving rise to interactive, real-time booking and transactional platforms.
• Incorrect Options:
  • First is incorrect because first-generation computers used vacuum tubes, punched cards, and basic serial processing layouts that were far too slow to handle dynamic, live user interactions.
  • Second is incorrect because transistor-based second-generation computers remained strictly bound to sequential batch processing workflows.
  • Fourth is incorrect because fourth-generation computers (built around microprocessors) expanded on real-time systems by introducing global distributed networking, personal computers, and modern internet layers rather than establishing their initial popularity.