The IsNull function determines whether the referenced fields include a null value, presenting the result as +1 or -1

Answer the following statements true (T) or false (F)

1. DVD is the standard UNIX block device. 2. A UNIX disk’s surface is divided into the boot block, a super block, the i-list, and space to hold data and/or directories. 3. To the UNIX user’s process, an open file is identified by a file descriptor, a small, nonnegative integer number. 4. When a file is created or an existing file grows, UNIX scans the FAT list and allocates space to the file. 5. Under UNIX, all character I/O takes place through a buffer pool located in the operating system.

Set up two new groups (you may need assistance from a system administrator if you do not have access to the root password, or see “Substituting a User: su” on page 139). Experiment with the group-related utilities and explore the permissions system.

What will be an ideal response?