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09 - Units of Information

 1. What is a bit?

  All the options listed here are valid

  A 0 or a 1

  The smallest unit of data in a computer

  A binary digit

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

  FALSE

  TRUE

 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.

  FALSE

  TRUE

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

  byte or bit

  nibble or nybble.

  kilobyte or megabyte

  terrabyte or gigabyte

 5. 1 byte refers to …

  1 bit

  2 bits

  8 bits

  5 bits

 6. 1 byte can be used to store

  one mp3 song

  a number from 0 to 255

  114 minutes of DVD Video

   page of text from a novel

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

  16 GB of memory

  32 bits of memory

  16 bytes of memory

  No memory

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

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

  hold the parts of a computer together

  perform calculations and store memory

  create the mother board

 9. A bit can be used to:

  store a single letter like A

  store a single number up to the value of 55

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

  store a single number up to the value of 255

 10. A byte can be used to

  all of the above

  store the letter 'C'

  store a single letter like A

  store a number from 0 to 255

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

  16Bi

  16BYTES

  16MB

  16B

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

  12 bytes

  1024 bytes (2 to the power of 10)

  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

  None of the above

  1000 Bytes

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

  The size of facebook's servers

  A CD-ROM

  A large hard drive

  A Music file (e.g. mp3)

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

  150 complete high definition movies

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

  20,000 complete high definition movies

  1 complete high definition movie

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

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

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

   Data centers and super computers may use petabytes of memory

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

 17. With over a billion daily active users, Facebook is the third-busiest site on the internet, according to Alexa. Which statement is true?
datarep_unitsofinformation_q4.jpg

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

  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 over 200 petabyte of storage, growing by several terabytes a day.

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

 18. An MP3 music track is about:

  1 - 3 KB

  3 - 5 MB

  1 - 100 KB

  1000 bits

 19. A typical high definition movie is about:

  5GB

  120 KB

  256 TB

  10,000 bits

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

  a bit

  both of the above

  None of the above

  a byte