Memory & Storage

Computer memory is non-permanent. For this reason, it’s called ___

• volatile memory

• random access memory

• sequential memory

• unstable memory

Any data written to storage, like your hard drive, will remain intact even if the power goes out. It’s ___

• constant

• dependable

• non-volatile

• stable

What was the earliest form of computer storage?

• magnetic core memory

• magnetostrictive delay lines

• delay line memory

• paper punch cards

By the 1940s, punch cards had largely standardized into a grid of 80 columns and 12 rows, allowing up to ___

• 96 bits of data

• 960 bits of data

• 96 bytes of data

• 960 bytes of data

The largest program ever punched onto cards, that we know of, was the US Military’s ___

• Strategic Defense Initiative

• OCE Officer Candidate Enrolment

• SAGE Air Defense System

• Ballistic Missile Defense program

Which form of memory, using liquid filled tubes, was developed by J. Presper Eckert in 1944?

• mercury tube memory

• delay line memory

• magnetostrictive delay lines

• magnetic core memory

Which liquid was commonly used to fill the tubes in delay line memory?

• water

• mercury

• sulfuric acid

• motor oil

Which early stored-program computer was completed in 1949 and used 128 Delay Lines?

• ENIAC

• EDVAC

• UNIVAC

• Atlas

In delay line memory, since you had to wait for a data bit to come around in the loop, it was called ___

• nonvolatile or read-only memory

• volatile or random access memory

• sequential or cyclic-access memory

• in-line or consecutive-access memory

Modern memory, where we can access any bit at any time, is known as ___

• nonvolatile memory

• random access memory

• sequential memory

• cyclic-access memory