Crash Course Computer Science: Memory and Storage

What is volatile memory?

• Memory that loses data when power is lost

• Memory that retains data even when power is lost

• Memory that is stored on a USB stick

• Memory that is stored on a hard drive

What was the earliest form of computer storage?

• Optical storage

• Paper punch cards

• Hard disk drives

• Magnetic tape

What was the main drawback of punch cards?

• They were not durable

• They required a lot of power

• They were expensive

• They were slow and write-once

Who developed Delay Line Memory?

• J. Presper Eckert

• Charles Babbage

• John Mauchly

• Alan Turing

What was the main drawback of Delay Line Memory?

• It was too expensive

• It could only read one bit of data at a time

• It was not reliable

• It required too much power

What technology surpassed Delay Line Memory in the mid-1950s?

• Magnetic tape

• Hard disk drives

• Optical storage

• Magnetic core memory

What was the first big use of core memory?

• ENIAC

• UNIVAC

• Whirlwind 1

• SAGE

What was the storage capacity of the RAMAC 305?

• 5 megabytes

• 5 kilobytes

• 5 terabytes

• 5 gigabytes

What is the main advantage of Solid State Drives (SSDs) over Hard Disk Drives (HDDs)?

• They have larger storage capacity

• They are more durable

• They have no moving parts

• They are cheaper

What is the main drawback of magnetic tape?

• It is not durable

• It is expensive

• It requires a lot of power

• It has slow access speed