131.
Which of the following separates primary file and extension is

132.
In Microsoft windows, the graphical pattern on the desktop used as background for windows is

133.
All of the following are task performed by the operating system except

134.
Which of the following is not an operating system?

135.
Operating system is like a

136.
Underlined character on the menu or dialog box known as

137.
Which key deletes text before, or to the left, of the insertion point?

138.
The chunks of a memory are known as

139.
Start / restart the computer is called

140.
Which file is transferred when computer is start up?

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