Questions

1. For the best portability, which of the following shebang lines should you place in your awk scripts?
   1. #!/bin/awk
   2. #!/usr/bin/awk -f
   3. #!/bin/awk -f
   4. #!/usr/bin/awk
2. Which of the following statements is true?
   1. All awk programming variables must be declared before you use them.
   2. There are various types of awk variables, such as integer, floating-point, and string.
   3. All awk programming variables are string-type variables.
   4. You must convert string-type variables to either integer or floating-point variables before using them in math operations.
3. Within an awk script, how would you define the comma as the field separator?
   1. -F=,
   2. -F=","
   3. FS=,
   4. . FS=","
4. You have a text file with several lines of numbers, with blank spaces between the numbers. Each line has a different number of numbers...