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ISRO 2017-ECE Number system
The Gray code for ($A5$) $16$ is equivalent to$10010101$$11010101$$11011111$$11011011$
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ISRO 2006-ECE Eigen Values
The Eigen values of are:a) 6, 1b) 6, -1c) -6, 1d) -6,-1
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ISRO2006-ECE calculus
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ISRO 2006-ECE Functions
$x^3$ + $x$ sin $x$ isa) Constant functionb) Odd functionc) Even functiond) Periodic function
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ISRO 2006- ECE Probability
A box contains 5 black and 5 red balls. Two balls are one after another from the box, without replacement. The probability of both balls being red isa) 1/90b) 1/5c) 19/...
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ISRO 2006-ECE Concurrent Lines
The value of k for which the lines 2x + y -1 = 0,4x + 3y - 3 = 0 and 3x + ky - 2 = 0. are concurrent isa) -2b) 3c) 2d) -3
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ISRO 2006-ECE Matrix determinant
The determinant of is:a) 0b) -1c) 1d) 2
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ISRO 2006- ECE K Map
The function shown in the figure when simplified will yield a result with _______ terms$2$$4$$7$$14$
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ISRO 2006-ECE
Given the decimal number -19 an eight bit two's complement representation is given bya) 11101110b) 11101101c) 11101100d) none of these
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ISRO 2006- ECE
If the memory chip size is 256 x 1 bits, then the number of chips required to make up 1K bytes of memory isa) 32b) 24c) 12d) 8
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ISRO 2006 -ECE Venn Diagrams
The Boolean expression for the shaded area in the Venn diagram isa) X'+Y' +Zb) XY'Z + X'YZc) X + Y + Zd) X'Y'Z+XY
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ISRO 2006- ECE Boolean algebra
For the switch circuit, taking open as 0 and closed as 1, the expression for the circuit is $\text{Y}$.$A+ (B+C) D$$A+ BC +D$$A (BC+D)$None of these
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ISRO 2006-ECE A/D converter
10 bit A/D converters, the quantization error is given by (in percent)a) 1b) 2c) 0.1d) 0.2
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ISRO 2006- ECE Gray code
Gray code for number 7 isa) 1100b) 1001c)0110d) 0100
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ISRO 2006-ECE Flipflops
Which of the following statements are correct ?1. A flip-flop is used to store $1$ bit of information.2. Race-around condition occurs in a $J$-$K$ flip-flop when both the...
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ISRO 2006-ECE WAIT states
WAIT states are used toa) Make the processor wait during a DMA operationb) Make the processor wait during a power interrupt processingc) Make the processor wait during a ...
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ISRO 2006-ECE A/D Converter
The A/D converter used in a digital voltmeter could be (1) successive approximation type (2) Flash converter type (3) Dual slope converter type. The correct sequence in t...
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ISRO 2006-ECE Ripple counter
A Pulse train with a frequency of 1MHz is counted using a modulo 1024 ripple-counter built with J-K flip-flops. For proper operation of the counter the maximum permissibl...
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ISRO 2006-ECE AND OR gates
In the given network of AND and OR gates f can be written as: a) X0 X1 X2 .....Xn + X1 X2 . ....Xn + X2 X3 ....Xn.... Xnb) X0 X1 + X2 + X3 +....... +Xn-1 . XnC) X0+X1+ X2...
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ISRO 2006-ECE NAND gates
Assuming that only the X and Y logic inputs are available and their complements X' and Y' are not available, what is the minimum number of two-input NAND gates requires t...
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ISRO 2007- ECE Matrices
The Algebraic multiplicity of the matrix A= isa) 1b) 2c) 3d) 4
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ISRO 2007- ECE Probability
A bag contains eight white and six red marbles. The probability of drawing two marbles of same colour isa) $8c_2$ .$6c_2$ / $14c_2$ b) $8c_2$ /$14c_2$ + $6c_2$ /$14c_2$c...
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ISRO 2007- ECE Geometry
Equation of a straight line passing through the point (-1,2) and making equal intercepts on the axes isa) x -y =1b)x-2y=1c)x+y=1d) x-y=2
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ISRO 2007- ECE Integration
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ISRO 2007- ECE Determinant
The value of determinant is:a) 0b) 1c) 3d) a+b+c
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ISRO 2007-ECE Roots of equation
If a,b,c are the roots of equations $x^3$ + p$x^ 2$ +q$x$+p=0, Then the value of $$tan^{-1} a+ tan^{-1 }b+tan^{-1}c$$ isa) n π /4b) n π /2c) n πd) 2n π
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ISRO 2007- ECE Z plane
The region of the z plane for which |z-a|/|z+a| = 1 ($Re(a)$ ≠ 0) is:a) x-axisb) y axisc) The straight line z = lald) None of the above
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ISRO 2007- ECE Vectors
A unit vector perpendicular to the vectors a= 2i –3j + k and b=i+j-2k , isa) (1/ √ 3 ) (–i+j+k)b) (1/ √ 3 )(i+j- k)c) (1/ √ 3 )(i + j+k)d) (i+j+k)
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ISRO 2007- ECE Half Adder using NAND
The sum S of A and B in a half Adder can be implemented by using K NAND gates. The value of K isa) 3b) 4c) 5d) None of these
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ISRO 2007- ECE Program Counter
When a program is being executed in an 8085 microprocessor, its Program Counter containsa) The number of instructions in the current program that have already been execut...
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