Instrumentation Engineering
GATE IN topic:digital-electronics PYQs
Build your understanding with focused practice from past exam papers.
Questions 51–57 of 57. Imported answers require independent review unless marked reviewed.
Question 43
Open questionINMCQ2 marksNeeds review
The product of sum expression of a Boolean function
of three variables is given by
The canonical sum of product expression of
is given byYour answerChoose one option.
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A 2-bit synchronous counter using two J-K flip flops is shown. The expressions for the inputs to the J-K flip flops are also shown in the figure. The output sequence of the counter starting from
is 
Your answerChoose one option.
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Open questionINNAT2 marksNeeds review
A portion of an assembly language program written for an 8-bit microprocessor is given below along with explanations. The code is intended to introduce software time delay. The processor is driven by a 5 MHz clock. The time delay (in
s) introduced by the program is ______.Instruction | Explanation |
|---|---|
MVI B, 64H | Move immediate the given byte into register B. Takes 7 clock periods. |
LOOP: DCR B | Decrement register B. Affects Flags. Takes 4 clock periods. |
JNZ LOOP | Jump to address with Label LOOP if zero flag is not set. Takes 10 clock periods when jump is performed and 7 clock periods when jump is not performed. |
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The Boolean function F(X, Y) realized by the given circuit is
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Open questionINMCQ1 markNeeds review
An 8-bit microcontroller with 16 address lines has 3 fixed interrupts i.e., Int1, Int2 and Int3 with corresponding interrupt vector addresses as 0008H, 0010H and 0018H. To execute a 32-byte long Interrupt Service Subroutine for Int1 starting at the address ISS1, the location 0008H onwards should ideally contain
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A and B are the logical inputs and X is the logical output shown in the figure. The output X is related to A and B by
Your answerChoose one option.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 43
Open questionINMCQ2 marksNeeds review
The two inputs A and B are connected to an R-S latch via two AND gates as shown in the figure.
If A = 1 and B = 0, the output
isYour answerChoose one option.
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