1A student was performing an arithmetic operation and he multiplied a number by 3/2 instead of dividing it by 2/3 ...what was its error percentage..??
sol: 0%
2 Probability:
a radioactive element disintegrates by 20 th part every hour and find the probability that no matter is left out in a duration of 45 min...??
sol: since it deals with radioactive element ,n, is usually large..so poissons distribution is to be applied...
1hr=60min----------20
45min----------?
(45*20)/(60)=15..
Hence lamba=15
P(x=0)= (e-15)*(150)/(0!)
=(e-15)
3 If side of the square is x+2 and side of equilateral triangle is 2x and the perimeters of both square and equilateral triangle are equal ...then find the value of x..??
sol: 4*(x+2)=(3*2x)
i.e; x=4
4 if side of the square of increased by 5 and change in area was 165 then find the value of side of the square...??
sol: (x+5)2-x2=165
10x+25=165
10x=140
x=14
5 What is the name of the Command used to partition the disk
1 In a class out of 150 studs participated in various games foot ball ,basket ball, cricket are 120, 130,135 respecly and 5 stud are not playing any one of then then find the least no of studs which are are playing all the games
a)110 b)100 c) 96 Ans a
6. 20 men can do a work in c/2 days & 30 women can do the same work in c/3 days then how many days will take to complete the work when 20 men &30wmen work together
a)5c/6 b)c/6 c) 6c/5
7. find the lateral surface of a cone with diameter of base 12feet . and the latent height is 24feet
a) 1320square f.
b) 260 square f.
c) 96 square f.
d) none
ans : c
8. Ann is shorter than Jill and Jill is taller than Tom. Which of the following inferences are true
a) Ann is taller than Tom b) c) d) Data insufficient ans : d
9. Sum of squares of two numbers is 404 and sum of two numbers is 22.Then product of two Numbers?
a) 20 b) 40 c) d) (Answer is 40. Two numbers are 20 and 2)
10. (10 | 7) would produce
a). 17
b). 3
c). 11
d). 15
11. A 20kva transformer at full load conditions have the coreless & cu loss are 250w&300w,To get max efficiency what will be the total loss in tr in w
a) 550 b) 500 c) 600 d) Data insufficient Ans : b
12. There was a circuit consisting of AC voltage source and one inductance. Inductance value=0.2mH AC voltage =150 sin (1000t).what is the current flowing in the circuit?
a) b) c ) d)
13. Power gain of an amplifier having i/p gain of 20W and output gain of 20mW is
a) 60 b) 25 c) 10 d) 0
14. There was a RC circuit given with AC voltage source. Expression for capacitance was asked for charging condition. Choices were somewhat like this: a) some value multiplied by exp (-t/T)
ans --c i= (Vs/R)exp(-t/ T)
15.SCR s are connected in series to get
16. according to ohms law the current density is proportional to
a) current b) di/ds c) applied emf d)
17 Two more ques on gravity ie body is projected then find the time of fall and some physics ques
18. Structure comparison is done
a). yes
b) no
c) compiler dependent
d)
19. The system in which communication occurs in both ways but not simultaneously in both ways is
a) Half simplex b) Simplex c) Half duplex d) duplex
20. main ()
{
int a=5, b=6;
int i=0;
i=a>b? a:b;
printf (%d, i);
}
a) 0 b) 1 c) 6 d)5
a) high current rating b) voltage regulation c) high v rating d)some other
Ans: c
21. Which one of the following is used for high speed power application?
a) BJT b) MOSFET c) IGBT d) TRIAC
22. One question related with SCR timing dia
23. SCR is used for
a) To achieve optimum (or maximum ...not sure) dv/dt
b) For high current ratings
c) To achieve high voltage
d) Some other choice
24. State in which o/p collector current of transistor remains constant in spite of increase in base current is
a) Q point b) Saturation c) Cut off
25. what is the resonant frequency of parrel RLC circuit of R= 4.7 komh L= 2 micro Henry and c=30pf.
a). 20.5 MHz
b). 2.65 KHz
c). 20.5 KHz
d). none
26.for the parallel circuit (one figure is given) Is= 10mA. R1= 2R, R2=3R, R3= 4R. R is artritary
a). 3.076mA
b). 3.76mA
27 . Two ques on control sys like the sys will be stable when the roots are
a) real & +ve b) real & -ve c) d)
28 The ques on Niquest plot
29 0ne ques on root locus
30. One more question related with ADC like voltage is 8 volts. freqency 2 Mega hz. what is the converssion rate
31. Question related with serial in parallel out shift registerWhat is output sequence?
Ans..... 1010
32. Given one RLC circuit in which values of R, L and C were given. What is the value of frequency f?
33. #define A 10+10
main ()
{
int a;
a=A*A;
printf (%d, a);
}
a) 100 b) 200 c) 120 d) 400
ans : c
34. main(){
int n=0;
while(n>32767)
pf(%d,n);
n++
}
ans ; indefinite loop here ihe loop will continue again & again ie after 32767 the go to -32768
35. if (fun ())
{
X++;
}
X gets incremented if and only if
a) fun () returns 0
b) fun () return 1
c) fun () return -1
d) return a value other than 0 ans ; d
36. In dynamic memory
a) Power dissipation is less than that of static memory
b) Clock is needed
c) Refreshing is required
d) All the above
37. Short, int and long integers have how many bytes?
a)2,2,4 b) Machine dependant c)2,4,8 d) Some other choice ans : b
38. A (n) is -----------filter combination of
a) Passive b) Active c) AMPLIFIER d) BOOSTER
39 int fun (char c)
{
int i;
static int y ;}
a) c, i are stored in stack and y stored in data segment
b)c stored in stack and i,y are stored in data segment
c) c is stored in text segment, y in data and i in stack
40. how would you insert pre-written code into a current program?
a) #read
b) #get
c) #include
d) #pre ans: c
41.structure may contain
a) any other structure
b) any other structure expect themselves
c) any other structure except themselves and pointed to themselves
d) none of the above
42 One ques from pointer declaration
Section II
43 If a>4,b
