Computer Basic Information
The Santa Clara Valley, California is popularly known as Silicon Valley of America because

many silicon chip manufacturing firms are located there
Santa Claus visits it every Christmas
huge deposits of silicon are found there
it is full of large grain sand
None of these

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Computer Basic Information
The MS-DOS operating system is a .....

None of these
command-driven interface, multi-tasking operating system
graphical user interface, multi-tasking operating system
graphical user interface, single-tasking operating system
command-driven interface, single-tasking operating system

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