5.What is the function of the following keys.

(1)   Spacebar.
Ans. This is the largest key on the keyboard and is used to insert blank spaces between two characters or words.
(2)   Enter key
Ans. The enter key is used to move the cursor to the next line. It is also used to tell the computer to carry out the typed instruction.
(3)   Arrow keys.
Ans. The four arrow or cursor keys (up, down, left, right) can be pressed to move the cursor in these directions.
(4)   Escape key

Ans.  Escape key is used to tell the computer to abort or stop processing an instruction.