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Digital Electronics

Digital Electronics
Four ROM chips of 16 × 4 size have their address buses connected together. This system will be of size

 16 × 16
 32 × 8
 64 × 4
 256 × 1

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Digital Electronics
The voltages corresponding to LOW and HIGH levels respectively are given below. Identify the voltages which correspond to positive logic system.

 1 V and -5 V
 –1.5 V and – 5 V
 0 V and 5 V
 5 V and 0 V

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Digital Electronics
A ROM has a 16-bit address bus. The number of locations in this memory is

 32
 1024
 65536
 16

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Digital Electronics
Each term in the standard SOP form is called a

 literal
 minterm
 maxterm
 don’t care

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Digital Electronics
Which one of the following is an invalid state in 8-4-2-1 binary coded decimal counter

 1000
 1100
 0011
 1001

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Digital Electronics
Simplified form of the function f = (x+y+xy)(x+z)

 x+y
 y+xz
 x+xyz
 x+yz

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