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- 1. Multiple Choice
The electrically-controlled mechanical switches used in room-sized computers were called ___mechanical relaystransistorsvacuum tubesdipole switches - 2. Multiple ChoiceYou can think of a relay like a water faucet. The control wire is like the ___spoutflow of waterfaucet handlesupply pipe
- 3. Multiple ChoiceA good relay in the 1940’s might be able to flick back and forth ___five times in a secondfifty times in a second500 times in a second500 times in an hour
- 4. Multiple ChoiceFor the Harvard Mark I, complex operations, like a trigonometric function, could take ___a few secondssix seconds15 secondsover a minute
- 5. Multiple ChoiceThe Harvard Mark I had roughly 3500 relays. On average, one faulty relay would need replacing every ___hourdayweekmonth
- 6. Multiple ChoiceWhat type of "bug" was pulled from the Harvard Mark II in September 1947?a grasshoppera butterflya houseflya moth
- 7. Multiple ChoiceShe said, "From then on, when anything went wrong with a computer, we said it had bugs in it."Ava LovelaceGrace HopperClair BabbageEdith Clarke
- 8. Multiple ChoiceIn 1904, English physicist John Ambrose Fleming developed the first ___mechanical relayvacuum tubetransistorintegrated circuit
- 9. Multiple ChoiceAn electronic component that permits the one-way flow of current is called ___a transistora diodea relaya switch
- 10. Multiple ChoiceIn 1906, what did Lee de Forest add to the Fleming valve?a glass envelopea third “control” electrodea mechanical relaya dipole switch
- 11. Multiple ChoiceTriode vacuum tubes became the basis of radio and many other electronic devices for ___a decadethree decadesnearly a half-centurynearly a century
- 12. Multiple ChoiceThe first large-scale use of vacuum tubes for computing was ___the Harvard Rhode's 1the Colossus Mark 1the Rhode's ENIACthe Colossus Rhode's 1
- 13. Multiple ChoiceWho built an electro-mechanical machine, called the Bombe, at Bletchley Park in the UK?Tommy FlowersLee de ForestJohn Ambrose FlemingAlan Turing
- 14. Multiple ChoiceENIAC, the first general purpose, programmable, electronic computer, was completed in 1946 at ___Harvard UniversityBletchley Park, in the UKthe University of Pennsylvaniathe University of Cambridge, in the UK
- 15. Multiple ChoiceHow many ten-digit additions or subtractions could ENIAC perform per second?505005,00050,000
- 16. Multiple ChoiceIn 1947, what radical new electronic switch was built by Bell Laboratory scientists?the vacuum tubethe relaythe transistorthe integrated circuit
- 17. Multiple ChoiceA material that can sometimes conduct electricity and other times resist it is called ___a semiconductora relaya diodea ferrous metal
- 18. Multiple ChoiceUnlike vacuum tubes made of fragile glass, transistors were known as ___solid-glass componentssolid-state componentsliquid-state componentsthermionic components
- 19. Multiple ChoiceThe IBM 608 was the first fully transistor-powered, commercial computer. The year was ___1932194519571975
- 20. Multiple ChoiceCompleted in 1944, it was one of the largest electro-mechanical computers ever built.The US Air Force’s AN/FSQ-7 computerthe Harvard Mark IENIACthe IBM 608
- 21. Multiple ChoiceColossus, the first programmable, electronic computer, contained ___16 megabytes of RAM160 electro-mechanical relays1,600 vacuum tubes16,000 transistors
- 22. Multiple ChoiceHow was programming done on the Colossus Mark 1?by feeding in punched cardsby plugging wires into plugboardsby using a keyboardby pressing buttons and toggle switches
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