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09 - Units of Information

 1. What is a bit?

  The smallest unit of data in a computer

  A 0 or a 1

  All the options listed here are valid

  A binary digit

 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.

  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

  5 bits

  8 bits

  2 bits

 6. 1 byte can be used to store

  a number from 0 to 255

   page of text from a novel

  114 minutes of DVD Video

  one mp3 song

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

  No memory

  16 bytes of memory

  32 bits of memory

  16 GB of memory

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

  perform calculations and store memory

  hold the parts of a computer together

  describe disk space, data storage or the capacity of system 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

  store a number from 0 to 255

  all of the above

  store the letter 'C'

  store a single letter like A

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

  16MB

  16B

  16BYTES

  16Bi

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

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

  1024 bytes (2 to the power of 10)

  102 bytes

  12 bytes

 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

  None of the above

  1000 Bytes

  1024 GB

  1024 TB

 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 Music file (e.g. mp3)

  A large hard drive

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

  20,000 complete high definition movies

  1 complete high definition movie

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

  150 complete high definition movies

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

  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

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

   Data centers and super computers may use petabytes of memory

 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 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 1 trillion bits of storage, growing by several million bits per day

  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 - 100 KB

  1 - 3 KB

  3 - 5 MB

 19. A typical high definition movie is about:

  10,000 bits

  5GB

  120 KB

  256 TB

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

  both of the above

  None of the above

  a byte

  a bit