ONE 6th FORM Hashing

Best for passwords

• Encryption
• Hashing

What name is given to the process of turning an input into a fixed size value?

• Hashing
• Compression
• Encryption

Hashing is not the problem of finding an appropriate mapping of keys into addresses.

• True

• False

What is the advantage of using a doubly linked list for chaining over singly linked list?

• it takes less memory

• it is easy to implement

• it makes the process of insertion and deletion faster

• it causes less collisions

In open addressing the hash table can never become full.

• True

• False

Which of the following trait of a hash function is most desirable?

• it should cause less collisions

• it should cause more collisions

• it should occupy less space

• it should be easy to implement

Hashing is ...

• The interception of a key that is used to decrypt data

• The transformation of a string of characters into a fixed length value or key that represents the original input string

• When data from a database is mismanaged

• When minor changes in the original string can completely change the hash value

Hashing is ...

• Changes data before it reaches the spreadsheet records to be compared to

• Is very secure

• Is not very secure

• Changes data before it reaches the database records to be compared to

Hashing ...

• Changes data before it reaches the spreadsheet records to be compared to

• Never stores sensitive data as plain text

• Is not very secure

• Stops hackers being able to see data and they will only see the hashed values

A hash table is

• an abstract data structure

• an array

• an integer

• made of pine