Robert Bosch Latest Placement paper with answers and
Progrmming questions,Technical Questions,Written Test aptitude Questions
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
register…What 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<-1 then which of the following is true
a)2a+b<0 b) 4a<3b c) a>4b d) some oth
44. A 16 bit monosample is used for digitization of voice.
If 8 kHz is the sampling rate then the rate at which bit is transferred is
a) 128 b) 48 c) d)
45 There was a figure of JK flip flop in which ~q is
connected to J input and K=1. If clock signal is successively applied 6 times
what is output sequence (q=?)
d) 010101
46. The relationship b/w Gain & Bandwidth?
a) Independent of each other
b) Gain decreases as bandwidth decreases
c) Gain increases as bandwidth increases till some extent
after which stability decreases
47. In “ON CHIP” decoding memory can be decoded to
a) 2^n b)2^n +1 c)2^n -1 d) some other choice Ans: a
48. Half of address 0Xffffffff is
a) 77777777 b) 80000000 c) 7FFFFFFF d) some other choice
49. For a 4 bit succe D/A with 16v o/p the resolution is
a)10v b)1v c)1.6v d)16v Ans : b
50 A man has to cover a distance of 45 Km. He can run at
15kmph and can walk at 5kmph. If he covers half the distance by running and
half by walking then find the time taken to cover the distance.
(a) 6 hrs (b) 7hrs (c) 8hrs (d) 9 hrs
ans: A
51Mr. X (father) is twice his daughter’s age. How many yrs.
Ago was he three times his daughter’s age, if his daughter’s present age is 20?
(a) 8 (b)10 (c) 12 (d) 15
ans: B
52 9, 25, 49, 81, 121, ?
(a) 141 (b) 169 (c) 154 (d) 168
53 3, 9, 27, ? , 243, 729, 2187
(a) 91 (b) 81 (c) 60 (d) 68
54 15 men can do a job in 16 days, 12men will do the same in
how many days?
(a) 20 (b) 25 (c) 30 (d) 35
ans: A
55 Which of the following comes first when written in the
chronological order?
(a) 100 A.D. (b) 50 B.C. (c) 500 B.C. (d) 10 A.D.
ans: C
56. What is the output of the program
void main()
{
int i,j,k;
i=2;
j=4;
k=i++>j&2;
printf("%d\n",k);
if(++k && ++i<--j|| i++)
{
j=++k;
}
printf(" %d %d %d",i,-j--,k);
getch();
}
A. 4,-3,2
B. 5,-3,2
c. 4,-2,2
D. 5,-2,2
Ans: D
57 what the program do...
vob (int a ,int b)
{
a=a^b;
b=a^b;
a=a^b;
}
ficssa(int a[], int n)
{
for(int i=0;i for(int j=i+1;j if(a[i]>a[j]) {
vob(a[i],a[j]);}
}
}
}
58 What is the output of the program
#include<stdio.h>
#include<conio.h>
void main()
{
int i,j=20;
clrscr();
for(i=1;i<3;i++)
{
printf("%d,",i);
continue;
printf("%d",j);
break;
}
getch();
}
// A. 1,20
// B. 1,20,1,20
// c. 1,2
// D. 1,2,20,20
Ans: c
ANS: fdisk
Sol: When you run the fdisk and format commands, the Master
Boot Record (MBR) and file allocation tables are created. The MBR and file
allocation tables store the necessary disk geometry that allows hard disk to
accept, store, and retrieve data
59 A question from MS-DOS
ans)msconfig.exe
60 A quesion is on paging(Memory management)
Formulae: Effective access time=((1-p)*m+(p*s))
where (1-p) is called hit ratio, p is called page fault
ratio, 'm' is called main memory access time, 's' is called pagefault service
time.
