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07 - Units of Information (how we get memory)

 1. What is a bit?
note: If you are able to, give this video a watch. It will provide a context for this quiz and units of information. 

  A binary digit

  A 0 or a 1

  The smallest unit of data in a computer

  All of the given options are valid

 2. A bit has a single binary value -either 0 or 1

  TRUE

  FALSE

 3. The value of a bit is usually stored as either above or below a designated level of electrical charge in a single capacitor within a memory device.

  TRUE

  FALSE

 4. A group of four bits, or half a byte, is sometimes called a ____________________

  byte or bit

  terrabyte or gigabyte

  kilobyte or megabyte

  nibble or nybble.

 5. 1 byte refers to …

  5 bits

  8 bits

  2 bits

  1 bit

 6. 1 byte can be used to store

  114 minutes of DVD Video

  a number from 0 to 255

  one mp3 song

   page of text from a novel

 7. This shows a memory stick with….
datarep_unitsofinformation_q1.jpg

  No memory

  16 bytes of memory

  16 GB of memory

  32 bits of memory

 8. bits, bytes, megabytes, gigabytes, terabytes etc are all used to…

  hold the parts of a computer together

  perform calculations and store memory

  create the mother board

  describe disk space, data storage or the capacity of system memory

 9. A bit can be used to:

  store a single letter like A

  hold the answer to a yes/no or true/false question

  store a single number up to the value of 255

  store a single number up to the value of 55

 10. A byte can be used to

  store a number from 0 to 255543474562

  store a word like 'CAT'

  store a single letter like A

  None of these options are valid answers

 11. The symbol for byte is uppercase B. 16 bytes would be written as

  16Bi

  16MB

  16BYTES

  16B

 12. A kilobyte is thought of as approximately 1000 bytes but to be accurate it is:

  1024 bytes (2 to the power of 10)

  12 bytes

  102 bytes

  2024 bytes (which is 2 to the power of 10)

 13. Have a look at the table below which shows the units of information leading to memory. Fill in the blanks
datarep_unitsofinformation_q2.jpg

  1024 TB

  1024 GB

  1000 Bytes

  None of the above

 14. Look at the wikipedia list of sizes with examples below. What is the blank most likely to be?
datarep_unitsofinformation_q3.jpg

  A CD-ROM

  The size of facebook's servers

  A large hard drive

  A Music file (e.g. mp3)

 15. A 1TB hard disk could hold about….

  20,000 complete high definition movies

  half of a high definition movie (You would need 2TB to store a full movie)

  1 complete high definition movie

  150 complete high definition movies

 16. A petabyte is equivalent to 1024 Terabyes. Which of the statements is true?

   Data centers and super computers used petabytes of memory

  According to CISCO, in 2016 internet traffic for the whole world was approximately 0.3 petabytes per day!

  A petabyte is a unit of information equal to one thousand million

  Approximately 10 million photos that exist on Facebook amount to 10000 petabytes worth of data

 17. With over a billion daily active users, Facebook is the third-busiest site on the internet, according to Alexa. Which statement is true?
Some interesting facts about Facebook
======================================
Facebook's system processes 2.5 billion pieces of content 
and 500+ terabytes of data each day. 
	
It's pulling in 2.7 billion Like actions and 300 million photos 
per day, and it scans roughly 105 terabytes of data each half hour.
datarep_unitsofinformation_q4.jpg

  It's estimated that they have over 1 trillion bits of storage, growing by several million bits per day

  It's estimated that they have about 200,000 kilobytes of storage, growing by 1 million bits per day

  It's estimated that they have approximately 100TB of storage as of 2018

  It’s estimated that they have over 200 petabyte of storage, growing by several terabytes a day.

 18. An MP3 music track is about:

  1000 bits

  1 - 3 KB

  1 - 100 KB

  3 - 5 MB

 19. A typical high definition movie is about:

  5GB

  10,000 bits

  120 KB

  256 TB

 20. A single text character (like 'E') can be stored in….

  1GB (typically 1GB is needed per character)

  a bit

  a byte

  128 bytes minimum