1.2 Memory DIRT Quiz

Which of the following has the lowest cost for storage byte for byte?

• Internal magnetic hard disk

• Flash memory card

• Blu-Ray disk

• Internal solid state drive (SSD)

The unit of 1,048,576 or 1,000,000 bytes is called a…

• Megabyte

• Terabyte

• Gigabyte

• Kilobyte

UTF-8 Unicode which is the most popular character set on the web uses 17, two byte code points in the character set. The number of characters in the set can be calculated as…

• (2^16)*17 = 1,114,112 characters

• (2^17)*16 = 2,097,152 characters

• 2^17 = 131,072 characters

• (2^2)*17 = 68 characters

If you have a 2 second digital sample at 4 samples per second and stored at 8 bits per sample, how large is the sample size in bytes?

• 8 bytes

• 64 bytes

• 32 bytes

• 128 bytes

What is the hexadecimal number 20 in binary?

• 0010 0000

• 0001 0000

• 0000 0010

• 0001 0100

Which of these storage options is best for storing games external to a portable games console, thereby minimising the need for internal flash memory capacity?

• Flash memory cards

• Mini-hard disks

• DVD-R

• Proprietary, small optical disks

What is a purpose of the ROM?

• To store instructions for embedded systems

• To store the operating system on a modern PC

• To store instructions for applications software on a PC

• To store the results of calculations from the ALU

One advantage of solid-state memory over a hard disk is that…

• It uses less power

• It generally has a much larger capacity

• It is cheaper byte for byte

• Before it fails you usually get detectable anomalies

Why do computer systems need primary storage?

• Accessing data from secondary storage is slow

• The operating system can't be stored in secondary storage

• To provide for removable media

• All primary storage is non-volatile

How many 10MB photos could you store on a 2TB external hard drive?

• 200,000

• 20,000

• 20,000,000

• 2,000