Computer System Architecture - Digital Logic Circuits - Combinational Circuits

Avatto>>UGC NET COMPUTER SCIENCE>>PRACTICE QUESTIONS>>Computer System Architecture>>Digital Logic Circuits - Combinational Circuits

16. A one-to-four line demultiplexer is to be implemented using a memory. How many bits must each word have ?

  • Option : A
  • Explanation : 2 select line A and B will work as address lines, so we have 4 addresses (or words) Each word will have 4 bits so memory required is 4 x 4 = 16 bits
Cancel reply
Cancel reply

20. A positive AND gate is also a negative

  • Option : D
  • Explanation : Truth Table For AND 0 0 => 0 0 1 => 0 1 0 => 0 1 1 => 1 Now invert all values (as if you place inverters on the two inputs and the one output): 1 1 => 1 1 0 => 1 0 1 => 1 0 0 => 0
Cancel reply
Cancel reply