____ is essentially junk e-mail.

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

1. The tail command is used to display the last 10 lines of the specified file. 2. The command tail +20 xyz displays the first 20 lines of the file xyz. 3. The command wc -l filename displays the number of lines in the filename. 4. The command cat Xfile creates the Xfile and accepts input to file from the keyboard. 5. The command cat > Xfile displays the content of the Xfile.

The Fibonacci sequence was mentioned in the 2006 movie The DaVinci Code.

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