Which among the following generations of Computer used vacuum tubes?
A.Second Generation
B.Fourth Generation
C.Third Generation
D.First Generation✓ Correct
Explanation
First Generation computers (1940s–1950s) used vacuum tubes as their primary electronic component, which made them large, expensive, and heat-generating.
💡 Practice unlimited SSC CHSL PYQs + AI-tracked progress on each topic. Sign up free →