Question

what switching device used in first generation and second generation of computer​

Answer 1

The first generation of electronic computers used vacuum tubes, which generated large amounts of heat, were bulky and unreliable. A second generation of computers, through the late 1950s and 1960s featured circuit boards filled with individual transistors and magnetic core memory.

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Answer 2

Explanation:

A transistor computer, now often called a second generation computer, is a computer which uses discrete transistors instead of vacuum tubes. the first generation of electronic computers used vacuum tubes, which generated large amounts of heat, were bulky and unreliable.