Electronics and Communication Engineering - Digital Electronics - Discussion

29. 

If the functions w, x, y, z are as follows.
w = R + PQ + RS ,
x = PQR S + PQR S + PQ R S


Then

[A]. w = z x = z
[B]. w = z, x = y
[C]. w = y
[D]. w = y = z

Answer: Option A

Explanation:

Use k-map, then it will be easy.


Meenu Singh said: (Apr 2, 2015)  
Can anyone please help me solving it using k map, since the expression of 'y' and 'z' involves both min-terms and max-terms?

Neelima said: (Aug 22, 2015)  
Please can any one explain this?

Sharath said: (Jan 4, 2017)  
Can anyone explain clearly?

Mythily said: (Sep 16, 2017)  
Can anyone please explain the answer?

Prans said: (Nov 30, 2017)  
The answer a is incorrect. Now, for all values of pqrs (0000 to 1111) must satisfy the conditions.

For the example 1010, x evaluated to 0. While z is evaluated to 1. So the answer is wrong.

Swarag K said: (Apr 16, 2018)  
How to solve it by using k map? Please explain.

Pandu said: (Jul 3, 2018)  
Solve this by assuming the values.

Md Ramish said: (Aug 2, 2018)  
@Prans.

But x and z are equal.

Pravallika said: (Aug 28, 2018)  
What is the difference between p'q'r' and p'q'.r'?

Mishal said: (Dec 3, 2018)  
w=z and x=z (bar) is the right answer.

Anuj Kumar said: (Dec 15, 2018)  
Can anyone solve this for me with the help of K- map?

Hema said: (Dec 22, 2018)  
Hi, I am not getting this, Can anyone slove for me?

Swathi said: (Jul 19, 2019)  
Please give me the clear explanation.

Surya said: (Aug 3, 2019)  
X=PQR'S' +P'Q'R'S' +PQ'R'S'.

If x is equal to this term, the answer will be w=z x=z'.

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