True or false: Coding-Decoding rules

Exercise and reference answers

Questions

1. Statement is true

   Yes

   Statement

   In a +1 letter code, MYSTIFY becomes NZTUJGZ.

2. Statement is true

   Yes

   Statement

   Number coding always uses the position of letter in the alphabet (A=1...Z=26).

3. Statement is true

   Yes

   Statement

   Substitution coding replaces a word with a completely unrelated word.

4. Statement is true

   No

   Statement

   In a -1 letter shift, the letter A becomes B.