Crash Course Computer Science #19 - Memory & Storage

In general, computer memory is

• non-permanent

• permanent

Any data written into ​ (a)   , like your ​ (b)   , will stay there until it's over-written.

• storage
• hard-drive
• memory
• circuit
• CPU

By the 1940s, punch cards had largely standardized into a grid of ​ (a)   columns and ​ (b)   rows.

• 80
• 12
• 50
• 15
• 100
• 11

The largest program ever punched onto cards was the US Military's SAGE in 1958. The main program was roughly equivalent to 5 megabytes of data, which is about the size of modern

• text messages

• photos

• game apps

• web browsers

J. Presper Eckert invented Delay Line Memory in the 1940s. How does it work?

• it's a tube filled with mercury

• it used sound waves to store data

• it wrote binary onto circuits using light waves

• it's a slab of silicon

How many bits of memory could the EDVAC store?

A big drawback with delay line memory is that you could only read data in order, on a loop called

• continuous memory

• sequential memory

• cyclic-access memory

• revolving memory

It proved challenging to ​ (a)   the density of the memory, packing ​ (b)   together meant they were more easily mixed up. In response, new forms of delay line memory were invented, such as ​ (c)   delay lines.

• increase
• waves
• magnetostrictive
• compress
• data

What type of memory surpassed delay line by the 1950s?

• metal cone memory

• metallic core memory

• magnets in coils memory

• magnetic core memory

The real, physical example of magnetic core memory that Carrie Anne holds has yellow squares that can hold __ bits each.