alleryStart learning →Early electronic computers used glass parts to switch signals. What were they called?
AMagnets
BVacuum tubes
CWater pipes
DSolar cells
Answer & Solution
Correct answer: B. Vacuum tubes
Machines like ENIAC and Colossus used valves, also called vacuum tubes, as switches.
Keep practising Evolution of computers, hardware and software
Browse all Evolution of computers, hardware and software questions for Olympiad (Class 4), or explore more Computer Science topics.
Related questions
Early mechanical computing parts were replaced by faster electric parts. Why?The first programs for early computers were written in which kind of language?Which step of making software comes right after design?Which model lets you use an app a company hosts online for a fee?Which parts did Babbage plan as outputs: a printer, a bell and what else?Which machine did British codebreakers first attack with the help of electro-mechanical boWhich generation of computers is built using transistors in place of vacuum tubes?Kilby showed the first IC in 1958. The Intel 4004 came in 1971. How many years later?