Placement Papers: Bosch 2007 17th Feb 2007Tab.Amp
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SECTION 1 (TECHNICAL)

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 =?)

Frequency response of a filter is

Range of frequencies at which amplification of signal is employed.

Output voltage versus frequency (plot)

Filter which suppresses particular frequency


Gain and bandwidth of an op amp is

Independent of each other

Gain decreases as bandwidth decreases

Gain increases as bandwidth increases till some extent after which stability decreases


There was a figure of 4: 1 MUX in which A and B are select lines. Inputs S0 and S1 are connected together and labeled as C where as S2 and S3 are connected together and labeled as D. Then which of the following is true?

Y = B + C

Y = A + C

Y = A + B

Y = C + D (Where Y is the output)


In step up transformer (or Step down not sure) transformation ratio is 1: 5. If the impedance of secondary winding is 16 ohm then what is the impedance of primary winding?

80

3.2


There was a circuit consisting of AC voltage source and one inductance. Inductance value = 0.2mH (or 0.2uH or 0.2H not sure). AC voltage = 150 sin (1000t). What is the current flowing in the circuit?

i = 7.5 sin (1000t)

i = 7.5 sin (1000t)

i = 7.5 cos (1000t)

i = 7.5 cos (1000t)


Power gain of an amplifier having i/p gain of 20W and output gain of 20mW is

60

25

10

0


There was a RC circuit given with AC voltage source.

Expression for capacitance was asked for charging condition.

Instrumentation amplifier is used for____?

effective shielding

high resective filters

high common mode

all the above:


In ON CHIP decoding memory can be decoded to

2^{n}

2^{n} + 1

2^{n} − 1

some other choice


Half of address 0Xffffffff is

77777777

80000000

7FFFFFFF

some other choice


Which one of the following is used for high speed power application?

BJT

MOSFET

IGBT

TRIAC


One question related with SCR rotation angle given ifring angle is 30degree ans150degree

SCR is used for

To achieve optimum (or maximum … Not sure) dv/dt

For high current ratings

To achieve high voltage

Some other choice


State in which o/p collector current of transistor remains constant in spite of increase in base current is

Q point

Saturation

Cut off


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

128

48


To use variable as recursive, variable should be used as

Static

Global

Global static

Automatic


what is the resonant frequency of parrel RLC circuit of R = 4.7 komh L = 2 micro Henry and c = 30pf.

20.5 MHz

2.65 KHz

20.5 KHz

none


for the parallel circuit (one figure is given) Is = 10mA. R1 = 2R, R2 = 3R, R3 = 4R. R is artritary

3.076mA

3.76mA


main () { int a = 0 × 1234; a = a>>12; a = a<<12; printf (%x, a); } What is the output?

1000

2000

None of these


What does ( * fun () []) (int) indicate? ans… An array of pointer to a functions that an int as parameter and return int.

#define A 10 + 10 main () { int a; a = A * A; printf (%d, a); }

100

200

120

400


One more question related with ADC like voltage is 8 volts. Freqency 2 Mega hz. What is the converssion rate

Question related with serial in parallel out shift register What is output sequence? Ans____ 1010

Given one RLC circuit in which values of R, L and C were given. What is the value of frequency f?

if (fun () ) { X + +; } X gets incremented if and only if

fun () returns 0

fun () return 1

fun () return1

return a value other than 0


In dynamic memory

Power dissipation is less than that of static memory

Clock is needed

Refreshing is required

All the above


Short, int and long integers have how many bytes?

2, 2, 4

Machine dependant

2, 4, 8

Some other choice


A n is____filter combination of

Passive

Active

AMPLIFIER

BOOSTER


Mobility of electron is

Increases as temperature increases

Decreases as temp decreases

Independent of conductivity

Some other choice


Structure comparison is done

yes

no

compiler dependent


The system in which communication occurs in both ways but not simultaneously in both ways is

Half simplex

Simplex

Half duplex

duplex


main () { int a = 5, b = 6; int i = 0; i = a>b? a: b; printf (%d, i); }

0

1

6


int fun (char c) { int i; static int y; }

c, i are stored in stack and y stored in data segment

c stored in stack and i, y are stored in data segment

c is stored in text segment, y in data and i in stack


main () { int * p; short int i; p = (char * ) malloc (i * 10) (code was showing error here); p + = 10; printf (%d, p); } Value of p?

main () { int * p, i[2] = { 1, 2, 3}; p = i; printf (%d %d %d, i [0], * p, * p + 1); }

F = A'B' + C ‘+ d' + E’ then

F = A + B + C + D + E

F = (A + B) CDE

F = AB (C + D + E)

F = AB + C + D + E


how would you insert prewritten code into a current program?

#read<>

#get<>

#include <>

#pre<>


structure may contain

any other structure

any other structure expect themselves

any other structure except themselves and pointed to themselves

none of the above


three boys x, y, z and three girls x, y, z… Sit around a round table. But x does not want any girl sitting to him and girl y does not want any boy sitting next. How many ways can they be seated.

2

4

6

8


k is brother of n and x. y is the mother of n and z is is the father of k. Which of the following statement is not definitely true.

k is the son of z.

y is the wife of z.

k is the son of y.

n is the brother of x.


find the lateral surface of a prism with a triangular base if the perimeter of the base is 34 cm. And the height is 45 cm.

765 square cm.

3060 square cm.

1530 square cm.

none


Given a< b< c < d. What is the max ratio of given equation

(a + b)/(c + d)

(b + c)/(a + d)

(c + d)/(a + b)

(a + c)/(b + d)


A and B starts moving from points X and Y simultaneously at a speed of 5kmph and 7kmph to a destination point which is of 27 km from points X and Y. B reaches Y earlier than A and immediately turns back and met Z. Find the distance XZ. Ans____ 22.5 km

Ann is shorter than Jill and Jill is taller than Tom. Which of the following inferences are true?

Ann is taller than Tom

Data insufficient


A and B starts from same point at opposite direction. They will move 6km and take 8km left. How Far is A and B from each other? ans …20m

6440 soldiers are to be arranged in the shape of square. If 40 soldiers were kept out then the number of soldiers making each straight line is? Ans80

Sum of squares of two numbers is 404 and sum of two numbers is 22. Then product of two Numbers?

20

40

(Answer is 40. Two numbers are 20 and 2)


In an examination 4 marks are assigned for correct answer and 1 mark is deducted for wrong answer. However one student attempted all 60 questions and scored 130. Number of questions he attempted correct is?

35

38

42

35


Each ruby is of 0.3 kg and diamond is of 0.4 kg. Ruby costs 400 crores and diamond costs 500 crores. Ruby and diamonds have to be put into a bag. Bag cannot contain more than 12 kg. Which of the following gives maximum profit (or in terms of wealth) (In crores) ans … Only ruby 40p

the cpu stack is placed in ____

cpu resister

RAM

ROM

hard disk


(10  7) would produce

17

3

11

15
