1. Which of the following are valid keys for a hash? ’CAPZ’ ’12’ ’$key’ $key 2. Hash keys need to be unique. In the following data pairs, indicate which should be the key and which should be the...

1. Which of the following are valid keys for a hash? ’CAPZ’ ’12’ ’$key’ $key

2. Hash keys need to be unique. In the following data pairs, indicate which should be the key and which should be the value. a. Gene Name b. Genetic Distance a. Species b. Ecosystem a. Plate well b. Gene Name a. Accession b. Gene Name a. Sequence b. Accession

3. What type of loop would you use for each situation? a. printing an unknown number of sequences in a FASTA library b. incrementing each value of an array c. incrementing a counter d. listing all the values in an array

4. One of the many mantras of Perl programming is ‘‘There’s more than one way to do it.’’ Come up with as many ways as you can to create an indeterminate loop that executes at least once.