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Answers by Rahul Jain25

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ISRO2013-ECE Digital Logic
If a counter having $10$ flip flops is initially at $0,$ what count will it hold after $2060$ pulses?$000\; 000\; 1100$$000 \;001\; 1100$$000 \;001\; 1000$$000 \;000\; 11...
1.7k
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1 votes
ISRO2013-ECE Digital Logic
What is the division factor of the given clock divider circuit?$2$$3$$1.5$$2.5$
648
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1 votes
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)
613
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2 votes
combinational circuit
Let combinational function $f(\text{a, b, c, d}) = \text{abc}'+\text{ab}'\text{cd}'$ (where $x'$ means complement of $x$). If all inputs are equally probable, then the pr...
2.1k
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2 votes
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...
946
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2 votes
ISRO 2007-ECE : Binary Codes
The logic circuit given below converts a binary code Y1 Y2 Y3 intoa) Excess -3 codeb) Gray codec) BCD coded) Hamming code
2.9k
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2 votes
ISRO 2007-ECE Up counter
A 4-bit presetable UP counter has preset input 0101. The preset operation takes place as soon as the counter reaches 1111. The modulus of the counter isa) 5b) 10c) 11d) 1...
6.2k
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4 votes
ISRO 2007-ECE Counters
A 4-bit synchronous counter uses flip-flops with propagation delay time of 25 ns each. The maximum possible time required for change of state will bea) 25 nsb) 50 nsc) 75...
819
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4 votes
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
829
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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...
886
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0 votes
ISRO 2007- ECE Matrices
The Algebraic multiplicity of the matrix A= isa) 1b) 2c) 3d) 4
485
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3 votes
ISRO 2007- ECE Determinant
The value of determinant is:a) 0b) 1c) 3d) a+b+c
3.5k
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2 votes
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
1.7k
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3 votes
Find the shortest tour for given graph using greedy approach
$\begin{bmatrix} 0& 29& 19& 25& 22\\ 20& 0& 21& 23& 21\\ 19& 21& 0& 21& 20\\ 25& 23& 21& 0& 32\\ 22& 21& 20& 22& 0 \end{bmatrix}$Find the shortest tour for given graph us...
2.5k
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1 votes
Probability
The probability that a student knows the correct answer to a multiple choice question is 2/3. If the student doesn't know the answer then the student guess the answer. Th...
825
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0 votes
ISRO2012-ECE Boolean Logic
The truth table for implementing a Boolean variable $\text{F}$ is given where $d$ represents don't care states. The minimized expression for $\text{F}$ is:$BC' +AC'+AB$$A...
1.4k
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0 votes
ISRO2012-ECE Probability
Person $\text{X}$ can solve $80\%$ of the ISRO question paper and Person $\text{Y}$ can solve $60\%.$ The probability that at least one of them will solve a problem from ...
689
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1 votes
ISRO 2008-ECE Pipeline
Assuming ideal conditions, the speed up obtained from a balanced N stage pipeline is(a) $2N$(b) $N^ 2$(c) $N$(d) $N!$
348
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1 votes
ISRO2012-ECE: Engineering Mathematics
The area bounded by the curves $y^2 =x, y=x $ is given by$2/3$$1/2$$1/6$$1/3$
500
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ISRO 2012- ECE Probability
a) 0 & 1b) 1 & 2c) 1 & 4d) None of these
1.5k
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3 votes
ISRO 2008-ECE exit() function
The library function exit ( ) causes as exit from (a) the loop in which it occurs(b) the block is which it occurs(c) the functions in which it occurs(d) the progam in whi...
1.5k
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2 votes
ISRO 2008- ECE adjoint Matrix
The matrix is its own adjoint. The value of x will be(a) 5 (b) 3 (c) -3 (d) -5
753
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ISRO 2007-ECE Half Adder Circuit
A half adder can be constructed using two $2$-input logic gates. One of them is an $\text{AND}$-gate, the other is$\text{OR}$$\text{NAND}$$\text{NOR}$$\text{EX-OR}$
2.5k
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1 votes
ISRO 2007-ECE JK flipflop as Divide by 2 circuit
For one of the following conditions, clocked $J$-$K$ flip-flop can be used as divided by $2$ circuit where the pulse train to be divided is applied at clock input :$J$ = ...
459
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1 votes
ISRO 2008-ECE Interrupt request in daisy chain
In a daisy chained connection to the CPU, the peripheral whose interrupt request has the highest priority is the one(a) With the largest vector address(b) With highest sp...
884
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2 votes
ISRO 2008- ECE Probability
A husband and wife appear in an interview for two vacancies for same post The. probability of husband getting selected is 1 /5 while the probability of wife getting sele...
7.2k
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6 votes
ISRO 2008- ECE minimum number of NAND Gates
Minimum number of 2-input NAND gates that will be required to implement the function: Y = AB + CD + EF is(a) 4(b) 5(c) 6(d) 7
2.5k
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0 votes
ISRO 2008-ECE - Ripple counter
In a ripple counter how many changes in state happen when count changes from 7 to 8?(a)$1$(b)$2$(c)$3$(d)$4$
1.3k
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0 votes
ISRO 2009- ECE Computer architecture
An 8-bit microcontroller has an external RAM with the memory map from 8000H to 9FFFH.The number of bytes this RAM can store isa) 8193b) 8192c) 8191d) 8000
1.3k
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1 votes
ISRO 2008- ECE Johnson Counter
The mod number of a Johnson counter will be always equal to the number of flip flops used :sametwice$2N$ where $N$ is the number of flip flops.None of the these
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