Why are vacuum tubes also called valves?

A) Because they can amplify the weak signals and make them strong
B) Because they can stop or allow the flow of current
C) Both of above
D) None of above

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A dumb terminal has

A) an embedded microprocessor
B) extensive memory
C) independent processing capability
D) a keyboard and screen

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A register organized to allow to move left or right operations is called a ____

A) Counter
B) Loader
C) Adder
D) Shift register

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The brain of any computer system is

A) ALU
B) Memory
C) CPU
D) Control unit

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In most IBM PCs, the CPU, the device drives, memory expansion slots and active components are mounted on a single board. What is the name of this board ?

A) Motherboard
B) Breadboard
C) Daughter board
D) Grandmother board

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