lehman brothers sample programming placement paper level1

7/29/2019 Lehman Brothers Sample programming Placement Paper Level1

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TITLE:Lehman Brothers Sample Programming Placement Paper Level1

(Bolded option is your answer)

1.void start() {

A a = new A();

B b = new B();

a.s(b);

b = null; /* Line 5 */

a = null; /* Line 6 */

System.out.println("start completed"); /* Line 7 */

}

When is the B object, created in line 3, eligible for garbage collection?A after line 5 B after

line 6

C after line 7 D There is no

way to be

absolutely

certain.

2.class HappyGarbage01

{

public static void main(String args[])

{HappyGarbage01 h = new HappyGarbage01();

h.methodA(); /* Line 6 */

}

Object methodA()

{

Object obj1 = new Object();

Object [] obj2 = new Object[1];

obj2[0] = obj1;obj1 = null;

return obj2[0];

}

}
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Where will be the most chance of the garbage collector being invoked?

A After line 9 B Afterline 10 C After line 11 D Garbagecollector

never

invoked in

methodA()

3.class Bar { }

class Test

{

Bar doBar(){

Bar b = new Bar(); /* Line 6 */

return b; /* Line 7 */

}

public static void main (String args[])

{

Test t = new Test(); /* Line 11 */

Bar newBar = t.doBar(); /* Line 12 */System.out.println("newBar");

newBar = new Bar(); /* Line 14 */

System.out.println("finishing"); /* Line 15 */

}

}

At what point is the Bar object, created on line 6, eligible for garbage

collection?

A after line 12 B afterline 14

C after line 7, when

doBar() completes

D after line

15, when

main()

completes


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4.public class X

{

public static void main(String [] args)

{

X x = new X();

X x2 = m1(x); /* Line 6 */

X x4 = new X();

x2 = x4; /* Line 8 */

doComplexStuff();

}

static X m1(X mx){

mx = new X();

return mx;

}

}

After line 8 runs. how many objects are eligible for garbage collection?

A 0 B 1 C 2 D 3

5.public Object m()

{

Object o = new Float(3.14F);

Object [] oa = new Object[l];

oa[0] = o; /* Line 5 */

o = null; /* Line 6 */

oa[0] = null; /* Line 7 */

return o; /* Line 8 */}

When is the Float object, created in line 3, eligible for garbage

collection?


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A just after line

5

B just

after line 6

C just after line 7 D just after

line 8

6.class X2{

public X2 x;


{

X2 x2 = new X2(); /* Line 6 */

X2 x3 = new X2(); /* Line 7 */

x2.x = x3;

x3.x = x2;x2 = new X2();

x3 = x2; /* Line 11 */

doComplexStuff();

}

}

after line 11 runs, how many objects are eligible for garbage collection?

A 0 B 1 C 2 D 3

7.What allows the programmer to destroy an object x?

A x.delete() B

x.finalize()

C

Runtime.getRuntime().gc()

D Only the

garbage

collection

system can

destroy anobject.

8.What will be the output of the program?

class PassA


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{


{

PassA p = new PassA();

p.start();

}

void start()

{

long [] a1 = {3,4,5};

long [] a2 = fix(a1);System.out.print(a1[0] + a1[1] + a1[2] + " ");

System.out.println(a2[0] + a2[1] + a2[2]);

}

long [] fix(long [] a3)

{

a3[1] = 7;

return a3;}

}

A 12 15 B 15 15 C 3 4 5 3 7 5 D 3 7 5 3 7 5


class Test

{public static void main(String [] args)

{

Test p = new Test();


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p.start();

}

void start()

{

boolean b1 = false;

boolean b2 = fix(b1);

System.out.println(b1 + " " + b2);

}

boolean fix(boolean b1){

b1 = true;

return b1;

}

}

A true true B false

true

C true false D false false


class PassS

{


{

PassS p = new PassS();

p.start();

}

void start()

{


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String s1 = "slip";

String s2 = fix(s1);

System.out.println(s1 + " " + s2);

}

String fix(String s1)

{

s1 = s1 + "stream";

System.out.print(s1 + " ");

return "stream";

}}

A slip stream B

slipstream

stream

C stream slip stream D slipstream

slip stream

11.Which of the following is the correct output for the C#.NET code

snippet given below?

enum color{

red,

green,

blue

}

color c;

c = color.red;

Console.WriteLine(c);A 1 B -1 C red D 0


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12.Which of the following will be the correct output for the C#.NET

code snippet given below?

enum color : int

{

red = -3,

green,

blue

}

Console.Write( (int) color.red + ", ");

Console.Write( (int) color.green + ", ");Console.Write( (int) color.blue );

A -3, -2, -1 B -3, 0, 1 C 0, 1, 2 D red, green,

blue

13.Which of the following is the correct output for the C#.NET code


enum color: int

{red,

green,

blue = 5,

cyan,

magenta = 10,

yellow

}

Console.Write( (int) color.green + ", " );Console.Write( (int) color.yellow );

A 2, 11 B 1, 11 C 2, 6 D 1, 5


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14.Which of the following is the correct output of the C#.NET code


int[ , , ] a = new int[ 3, 2, 3 ];

Console.WriteLine(a.Length);

A 20 B 4 C 18 D 10

15.Which of the following is the correct output of the C#.NET code


int[][] a = new int[2][];a[0] = new int[4]{6, 1, 4, 3};

a[1] = new int[3]{9, 2, 7};

Console.WriteLine(a[1].GetUpperBound(0));

A 2 B 3 C 4 D 5

16.What will be the output of the C#.NET code snippet given below?

namespace IndiabixConsoleApplication

{

class SampleProgram

{

static void Main(string[ ] args)

{

int i, j;

int[ , ] arr = new int[ 2, 2 ];

for(i = 0; i < 2; ++i)

{

for(j = 0; j < 2; ++j)

{


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arr[i, j] = i * 17 + i * 17;

Console.Write(arr[ i, j ] + " ");

}

}

}

}

}

A 0 0 34 34 B 0 0 17

17

C 0 0 0 0 D 17 17 0 0

17.Which of the following will be the correct output for the C#.NET

program given below?


{

class Sample

{

int i;

Single j;

public void SetData(int i, Single j){

i = i;

j = j;

}

public void Display()

{

Console.WriteLine(i + " " + j);

}}

class MyProgram

{


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{

Sample s1 = new Sample();

s1.SetData(10, 5.4f);

s1.Display();

}

}

}

A 0 0 B 10 5.4 C 10 5.400000 D 10 5

18.Which of the following will be the correct output for the C#.NETprogram given below?


{

class Sample

{

int i;

Single j;public void SetData(int i, Single j)

{

this.i = i;

this.j = j;

}

public void Display()

{

Console.WriteLine(i + " " + j);}

}

class MyProgram


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{


{

Sample s1 = new Sample();

s1.SetData(36, 5.4f);

s1.Display();

}

}

}

A 0 0.0 B 36 5.4 C 36 5.400000 D 36 5

19.What does the following C#.NET code snippet will print?

int i = 0, j = 0;

label:

i++;

j+=i;

if (i < 10){

Console.Write(i +" ");

goto label;

}

A Prints 1 to 9 B Prints 0

to 8

C Prints 2 to 8 D Prints 2 to

9

20.Which of the following is the correct output for the C#.NET program

given below?

int i = 20 ;

for( ; ; )


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{

Console.Write(i + " ");

if (i >= -10)

i -= 4;

else

break;

}

A 20 16 12 84 0

-4 -8

B 20 16 12

8 4 0

C 20 16 12 8 4 0 -4 -8 -12 D 16 12 8 4 0

21.What is the output of the C#.NET code snippet given below?


{

public enum color

{ red, green, blue };

class SampleProgram

{

static void Main (string[ ] args){

color c = color.blue;

switch (c)

{

case color.red:

Console.WriteLine(color.red);

break;

case color.green:

Console.WriteLine(color.green);

break;


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case color.blue:

Console.WriteLine(color.blue);

break;

}

}

}

}

A red B blue C 0 D 1

22.Declare the following statement?"An array of three pointers to chars".

A char

*ptr[3]();

B char

*ptr[3];

C char (*ptr[3])(); D

char **ptr[3];

23.What do the following declaration signify?

char **argv;

A argv is a

pointer topointer.

B argv is a

pointer toa char

pointer.

C argv is a function

pointer.

D argv is a

member offunction

pointer.


#include

int main()

{int y=128;

const int x=y;

printf("%d\n", x);

return 0;


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}

A 128 B Garbagevalue C Error D 0


#include

int main()

{

const int x=5;const int *ptrx;

ptrx = &x;

*ptrx = 10;

printf("%d\n", x);

return 0;

}

A 5 B 10 C Error D Garbage

value


#include

int main()

{

const char *s = "";char str[] = "Hello";

s = str;

while(*s)

printf("%c", *s++);


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return 0;

}

A Error B H C Hello D Hel


#include

int get();

int main(){

const int x = get();

printf("%d", x);

return 0;

}

int get()

{

return 20;}

A Garbage

value

B Error C 20 D 0


#include

int main()

{

const int i=0;

printf("%d\n", i++);


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return 0;

}

A 10 B 11 C No output D Error:++needs a

value


#include

int main()

{const c = -11;

const int d = 34;

printf("%d, %d\n", c, d);

return 0;

}

A Error B -11, 34 C 11, 34 D None of

these

30.How will you print \n on the screen?

A printf("\n"); B echo

"\\n";

C printf('\n'); D

printf("\\n");

31.If the binary eauivalent of 5.375 in normalised form is 0100 0000

1010 1100 0000 0000 0000 0000, what will be the output of the

program (on intel machine)?

#include

#include

int main()

{


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float a=5.375;

char *p;

int i;

p = (char*)&a;

for(i=0; i


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return 0;

}

A memfree(intp); Bdealloc(p); C malloc(p, 0); D free(p);

35.How many times "IndiaBIX" is get printed?

#include

int main()

{

int x;

for(x=-1; x


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{

printf("%c %d\n", j, j);

j++;

}

return 0;

}

A Infinite times B 255

times

C 256 times D 254 times

lehman brothers sample programming placement paper level1

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