1
GATE ECE 1997
MCQ (Single Correct Answer)
+1
-0.3
The curve given by the equation $${x^2} + {y^2} = 3axy$$ is
A
Symmetrical about $$x$$-axis
B
Symmetrical about $$y$$-axis
C
Symmetrical about the line $$y=x$$
D
Tangential to $$x=y=a/3$$
2
GATE ECE 1997
MCQ (Single Correct Answer)
+1
-0.3
The laplace transform of $${e^{\alpha t}}\,\cos \,\alpha \,t$$ is equal to ____________.
A
$${{s - \alpha } \over {{{\left( {s - \alpha } \right)}^2} + {\alpha ^2}}}$$
B
$${{s + \alpha } \over {{{\left( {s + \alpha } \right)}^2} + {\alpha ^2}}}$$
C
$${1 \over {{{\left( {s - \alpha } \right)}^2}}}$$
D
None
3
GATE ECE 1997
MCQ (Single Correct Answer)
+1
-0.3
In an 8085$$\mu$$P system, the RST instruction will cause an interrupt
A
only if an interrupt service routine is not being executed
B
only if a bit in the interrupt mask is made 0
C
only if interrupts have been enabled by an EI instruction
D
None of the above
4
GATE ECE 1997
MCQ (Single Correct Answer)
+1
-0.3
The decoding circuit shown below has been used to generate the active low chip select signal for a microprocessor peripheral. (The address lines are designated as $${A_0}$$ to $${A_7}$$ for I-O address) GATE ECE 1997 Microprocessors - Pin Details of 8085 and Interfacing with 8085 Question 3 English
A
60 H to H
B
A 4 H to A7 H
C
50 H to AF H
D
70 H to 73 H
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