Identify the correct order of the following major technological changes in computers based on first to fourth generation of computers.
A. Microprocessors
B. Vacuum Tubes
C. Integrated circuits
D. Transistors
Choose the correct answer from the options given below:
B, D, C, A
Computer hardware technology evolved through four generations, each marked by a defining component:
First generation computers (roughly the 1940s-1950s) used vacuum tubes (B) for circuitry and memory; these were bulky, generated great heat, and consumed enormous power.
Second generation computers (late 1950s-1960s) replaced vacuum tubes with transistors (D), which were smaller, faster, more reliable, and more energy-efficient.
Third generation computers (1960s-1970s) used integrated circuits (C), where many transistors and other components were fabricated together on a single silicon chip, further shrinking size and increasing speed.
Fourth generation computers (1970s onward) are built around the microprocessor (A), which packs an entire central processing unit onto a single chip, enabling personal computers.
Arranging these in chronological, first-to-fourth-generation order gives: vacuum tubes, transistors, integrated circuits, microprocessors, that is, B, D, C, A.
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