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Digital Electronics

Digital Electronics
What is the minimum number of 2 input NAND gates used to perform the function of 2 input OR gate

 2
 1
 4
 3

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Digital Electronics
The implicants which will definitely occur in the final expression are called

 selective prime implicants
 prime implicants
 essential prime implicants
 redundent prime implicants

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

 0 V and 5 V
 5 V and 0 V
 1 V and 5 V
 –1.5 V and – 0.5 V

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

 256 × 1
 16 × 16
 32 × 8
 64 × 4

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Digital Electronics
A new Binary Coded Pantry (BCP) number system is proposed in which every digit of a base-5 number is represented by its corresponding 3-bit binary code. For example, the base-5 number 24 will be represented by its BCP code 010100. In this numbering system,the BCP code 100010011001 corresponds to the following number in base-5 system

 1324
 423
 4231
 2201

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Digital Electronics
A system has following negative numbers stored in binary form as shown. The wrongly stored number is

 -48 as 11101000
 -89 as 10100111
 -32 as 11100000
 -37 as 11011011

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