Consider the set of all strings over the alphabet { a, b, /, . }{ a, b, /, . } that represent an ri (resource identifier). an ri is a non-empty sequence of forward-slash (//) separated non-empty strings composed of only the symbols aa and bb. the first string in the sequence may optionally be the .. symbol instead of a string composed of aa and bb. each string is separated by only one slash, and there are no slashes at the beginning or end of the sequence. write a regular expression, conformant with the syntax restrictions given at the top of this question, describing the set of strings as given above. write a (right) regular grammar describing the same set of strings.

When you type the pwd command, you notice that your current location on the linux filesystem is the /usr/local directory. answer the following questions, assuming that your current directory is /usr/local for each question. a. which command could you use to change to the /usr directory using an absolute pathname? b. which command could you use to change to the /usr directory using a relative pathname? c. which command could you use to change to the /usr/local/share/info directory using an absolute pathname? d. which command could you use to change to the /usr/local/share/info directory using a relative pathname? e. which command could you use to change to the /etc directory using an absolute pathname? f. which command could you use to change to the /etc directory using a relative pathname?

Which option correctly describes a dbms application? a. software used to manage databases b. software used to organize files and folders c. software used to develop specialized images d. software used to create effective presentations

What is the purpose of a computer network needs assessment? to analyze which workers need more training to improve their performance to compare worker productivity to determine what steps employees can take to increase company revenue to evaluate how to move from the current status to the desired goal