The best troubleshooting tool to use when a cable or DSL modem that used to work but now does not work is _______

A(n) ________ is used to query unrelated tables or queries and combine the results into a single dataset. This type of query is different from querying related tables as it combines two SQL SELECT statements

A) crosstab query B) SQL query C) subquery D) union query

Write a shell program called wgrep that searches a file for a given pattern, just as grep does. For each line in the file that matches, print a "window" around the matching line. That is, print the line preceding the match, the matching line, and the line following the match. Be sure to properly handle the special cases where the pattern matches the first line of the file and where the pattern matches the last line of the file.

What will be an ideal response?