IC number for the OR gate is a. 7400 O b. 7486 O c. 7408 O d. 7432

2. Explain which of the following instructions are invalid? State the invalidation reason and give the correct form for invalid instructions: a. MOV DL,AX b. MOV ES,CX c. MOV [BX],[2000] d. MOV BX,[AX] e. MOV CL,[BL+200] f. MOV 1234,DX g. MOV CH,[BX+SI+300] h. MOV DS,[SI+DI-5] i. MOV [4500],1234 j. MOV 200,[300]

For the device shown below: If the enable signal /EN (ENbar) is HIGH or (inactive) D So S1. EN O ALL outputs will be HIGH Except /YO (YObar) All the outputs will be HIGH All output will be HIGH except/Y3 (Y3bar) All the outputs will be LOW

The figure below shows the input waveforms for a NOR latch. Draw the corresponding output waveforms. S A Q

If a two-input logic gate produces a output of logic HIGH, only if both inputs are different, then the logic gate is O a. IC 7408 O b. IC 7486 O . IC 7432 O d. IC 7400

Q1: Can you clearly show the answer to both parts of this question

8. The output of a two input AND gate is one only when (a) its either input is one (b) its both inputs are one (c) its either input is zero (d) its both inputs are zero 9. The output logic level of an OR gate is one. (a) if both inputs are zero (b) only if both inputs are one (c) if either or both inputs are one (d) if the inputs are neither zero nor one 10. If two inputs of a NAND gate are shorted, then it is equivalent to (a) an OR gate (b) a NOT gate (c) AND gate (d) NOR gate

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