1.3.1 compression, encryption and hashing

Question 1

what name is given to the public and private keys used in asymmetric encryption?

Answer 1

key pair

Question 2

name the 2 categories of compression

Answer 2

lossy and lossless

Question 3

in which type of compression is the quality of a file not degraded?

Answer 3

lossless

Question 4

what is the purpose of encryption?

Answer 4

to keep data secure during transmission

Question 5

name one type of lossless compression

Answer 5

run length encoding, dictionary encoding

Question 6

in which form of encryption do the send and receiver share the same private key?

Answer 6

symmetric encryption

Question 7

how many keys are used in asymmetric encryption?

Answer 7

two - one public and one private

Question 8

what is said to have occurred when 2 keys map to the same hash?

Answer 8

a collision

Question 9

in which kind of lossless compression are repeated characters replaced by one occurrence and the number of times to repeat the character?

Answer 9

run length encoding

Question 10

what name is given to the process of turning an input into a fixed size valued

Answer 10

hashing

Question 11

which data structure uses hashing to store information with constant lookup time?

Answer 11

hash table

Question 12

what is meant by compression?

Answer 12

the process of reducing the same required to store a file