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MCQs Digital Logic Design

1. When we input two values 0 and 1 which of the following gates would output 1?

(A) OR gate


(B) NAND gate


(C) Both A and C


(D) AND gate



2. One nibble = ________ bits

(A) 16


(B) 8


(C) 4


(D) 2



3. Flip-flops that are unlocked are called

(A) Latches


(B) Register


(C) Transition tables


(D) None



4. Which is not equal to X?

(A) X NAND 1


(B) X NOR X


(C) X NOR 1


(D) X NAND X



5. What value Excess-8 code assigns to “-8”?

(A) 1000


(B) 1100


(C) 1110


(D) 0000



6. How many rows are needed in the primitive flow table for the gated latch?

(A) 3 rows


(B) 1 row


(C) 5 rows


(D) 7 rows



7. Which gate is added to the inputs to convert OR gate into NAND gate?

(A) XOR


(B) NOT


(C) OR


(D) AND



8. What is the acronym for LUT?

(A) Local User Terminal


(B) Least Upper Time Period


(C) None of given options


(D) Look Up Table



9. Final stable state in all cases is ____________.

(A) Undefined


(B) Changed


(C) Same


(D) Inverted



10. Which gate is equal to the EXCLUSIVE NOR gate if we put the inverter on it?

(A) NAND


(B) AND


(C) XOR


(D) OR



11. The three basic gates are

(A) NOT, OR, AND


(B) OR, AND, NAND


(C) AND, NAND, XOR


(D) NOT, NOR, XOR



12. In timing problem of _______________ complexity of asynchronous circuit is involved.

(A) Inputs


(B) Outputs


(C) Clock pulses


(D) Feedback path



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