HCL Previous year Placement Papers

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1. Which of the following involves context switch,

(a) system call

(b) priviliged instruction

(c) floating poitnt exception

(d) all the above

(e) none of the above

Ans: (a)



2. In OST, terminal emulation is done in

(a) sessions layer

(b) application layer

(c) presentation layer

(d) transport layer

Ans: (b)



3. For a 25MHz processor , what is the time taken by the instruction which needs 3 clock cycles,

(a)120 nano secs

(b)120 micro secs

(c)75 nano secs

(d)75 micro secs



4. For 1 MB memory, the number of address lines required,

(a)11

(b)16

(c)22

(d) 24

Ans. (b)



5. Semaphore is used for

(a) synchronization

(b) dead-lock avoidence

(c) box

(d) none

Ans. (a)



6. Which holds true for the following statement class c: public A, public B

a) 2 member in class A, B should not have same name

b) 2 member in class A, C should not have same name

c) both

d) none

Ans. (a)



7. OLE is used in

a) inter connection in unix

b) interconnection in WINDOWS

c) interconnection in WINDOWS NT



8. Macros and function are related in what aspect?

(a)recursion

(b)varying no of arguments

(c)hypochecking

(d)type declaration



9.Preproconia.. does not do which one of the following

(a) macro

(b) conditional compliclation

(c) in type checking

(d) including load file

Ans. (c)


10.Piggy backing is a technique for
a) Flow control
b) Sequence
c) Acknowledgement
d) retransmition
Ans. (c)

11.In signed magnitude notation what is the minimum value that can be represented with 8 bits
(a) -128
(b) -255
(c) -127
(d) 0

12.There is an employer table with key fields as employer number data in every n'th row are needed for a simple following queries will get required results.
(a) select A employee number from employee A , where exists from employee B where A employee no. >= B employee having (count(*) mod n)=0
(b) select employee number from employe A, employe B where A employe number>=B employ number group by employee number having(count(*) mod n=0 )
(c) both (a) & (b)
(d) none of the above

13.Type duplicates of a row in a table customer with non uniform key field customer number you can see
a) delete from costomer where customer number exists( select distinct customer number from customer having count )
b) delete customer a where customer number in b rowid
c) delete customer a where custermor number in( select customer number from customer a, customer b
d) none of the above

14. How many segment registers are there in the 8086 processor?
a) 4
b) 6
c) 8
d) none
Ans: a

15. Data recovery is done in which layer?
a) physical
b) datalink
c) network
d) transport

1. Given the following statement enum day = { jan = 1 ,feb=4, april, may} What is the value of may?
(a) 4
(b) 5
(c) 6
(d) 11
(e) None of the above

2. Find the output for the following C program
main()
{int x,j,k;
j=k=6;x=2;
x=j*k;
printf("%d", x);

3. Find the output for the following C program
fn f(x)
{ if(x<=0)
return;
else f(x-1)+x;
}

4. Find the output for the following C program
i=20,k=0;
for(j=1;j {k+=j<10?4:3;
}
printf("%d", k);
Ans. k=4

5. Find the output for the following C program
int i =10
main()
{
int i =20,n;
for(n=0;n<=i
{
int i=10;
i++;
}
printf("%d", i);
Ans. i=20

6. Find the output for the following C program
Y=10;
if( Y++>9 && Y++!=10 && Y++>10)
{printf("%d", Y);
else
printf("%d", Y);
}
Ans. 13


7. What is the sizeof(long int)
(a) 4 bytes
(b) 2 bytes
(c) compiler dependent
(d) 8 bytes

8.Which of the function operator cannot be over loaded
(a) <=
(b) ?:
(c) =
(d) *

9.Find the output for the following C program
main()
{intx=2,y=6,z=6;
x=y==z;
printf(%d",x)
}

10.find the output
main()
{
printf("%d%d"size of ("Hcl
technologies"),strlen("HCL Technologies"));
}
a)16 16
b)16 17
c)17 17
d)17 16

11. find the output
main()
{ char arr[]={ '
a','b','\n',....}
some more instructions;
}
ANS:77

12) find the output
main()
{ int arr[]={0,1,2,3,4)
int *a={arr, arr+1,arr+2,...}
int **p=a;
p++;
some instructions:
}

13. find the output
void main()
{
int i=5;
printf("%d",i++ + ++i);
}
a) 11
b) 12
c) 10
d) output cant be predicted
Ans: d

14. find the output
main( )
{
int a[2][3][2] = {{{2,4},{7,8},{3,4}},{{2,2},{2,3},{3,4}}};
printf(“%u %u %u %d \n”,a+1,*a+1,**a+1,***a+1);
}
a) 100, 100, 100, 2
b) 101,101,101,2
c) 114,104,102,3
d) none

15. find the output
main( )
{
static int a[ ] = {0,1,2,3,4};
int *p[ ] = {a,a+1,a+2,a+3,a+4};
int **ptr = p;
ptr++;
printf(“\n %d %d %d”, ptr-p, *ptr-a, **ptr);
*ptr++;
printf(“\n %d %d %d”, ptr-p, *ptr-a, **ptr);
*++ptr;
printf(“\n %d %d %d”, ptr-p, *ptr-a, **ptr);
++*ptr;
printf(“\n %d %d %d”, ptr-p, *ptr-a, **ptr);
}
Ans : 111
222
333
344

SECTION#3

1. Answer the questions based on the following program
STRUCT DOUBLELIST
{
DOUBLE CLINKED
INT DET; LIST VOID
STRUCT PREVIOUS; (BE GIVEN AND A PROCEDURE TO DELETE)
STRUCT NEW; (AN ELEMENT WILL BE GIVEN)
}
DELETE(STRUCT NODE)
{NODE-PREV-NEXT NODE-NEXT;
NODE-NEXT-PREV NODE-PREV;
IF(NODE==HEAD)
NODE
}
In what case the prev was
(a) All cases
(b) It does not work for the last element
(c) It does not for the first element
(d) None of these

2. Answer the questions based on the following program
VOID FUNCTION(INT KK)
{KK+=20;
}
VOID FUNCTION (INT K)
INT MM,N=&M
KN = K
KN+-=10;
}

What is the output of the following program
main()
{ int var=25,varp;
varp=&var;
varp p = 10;
fnc(varp)
printf("%d%d,var,varp);
}
(a) 20,55
(b) 35,35
(c) 25,25
(d)55,55



3. Here is the structure declaration of a doubly linked list
struct dlink
{
int nodeid;
struct dlink *next;
struct dlink *prev;
} dlink_t;
A pointer of the head of the linked list is maintained as a global variable, whose definition is
dlink_t *head; The funt remove_element(dlink_t *rp), needs to remove the node pointed to the
rp and adjust the head. The first node's prev and the last node's next are NULL.
remove_element(dlink_t *rp)
{
rp->prev->next = rp->next;
rp->next->prev = rp->prev;
if( head == rp)
head = rp->next;
}
Which of the following statement is true about the fution remove_element
a) It work when head is the same as rp
b) It does not work when rp is the last element on the list
c) It sets the head of the list correctly
d) It works in all cases
Answer :B


4. Consider the following function written in c:
#define NULL 0
char *
index(sp,c)
register char *sp,c;
{
do
{
if(*sp == c)
return (sp);
} while (*sp++);
return NULL;
}
The first argument sp, is a pointer to a C string. The second argument, c, is a character. This
function scarches for the character c, in the string. If it is found a pointer to that location is
returned else NULL is returned. This function works
a) Always
b) Always, but fails when the first byte contais the character c
c) works when c is a non NULL character only
d) Works only when the character c is found in the string
ans: a

5. What is printed when this program is executed
main()
{
printf ("%d\n",f(7));
}
f(X)
{
if ( <= 4)
return x;
return f(--x);
}
a) 4
b) 5
c) 6
d) 7
ans: a

6. On a machine where pointers are 4 bytes long, what happens when the following code is executed.
main()
{
int x=0,*p=0;
x++; p++;
printf ("%d and %d\n",x,p);
}
a) 1 and 1 is printed
b) 1 and 4 is printed
c) 4 and 4 is printed
d) causes an exception


7. Which of the following is the correct code for strcpy, that is used to copy the contents from src to dest?
a) strcpy (char *dst,char *src)
{
while (*src)
*dst++ = *src++;
}

b) strcpy (char *dst,char *src)
{
while(*dst++ = *src++ )
}

c) strcpy (char *dst,char *src)
{
while(*src)
{
*dst = *src;
dst++; src++;
}
}

d) strcpy(char *dst, char *src)
{
while(*++dst = *++src);
}
ans:b

8. Consider the following program
main()
{
int i=20,*j=&i;
f1(j);
*j+=10;
f2(j);
printf("%d and %d",i,*j);
}
f1(k)
int *k;
{
*k +=15;
}
f2(x)
int *x;
{
int m=*x,*n=&m;
*n += 10;
}
The values printed by the program will be
a) 20 and 55
b) 20 and 45
c) 45 and 45
d) 45 and 55
e) 35 and 35

9. what is printed when the following program is compiled and executed?
int
func (int x)
{
if (x<=0)
return(1);
return func(x -1) +x;
}
main()
{
printf("%d\n",func(5));
}
a) 12
b) 16
c) 15
d) 11

10.Consider the following of c code in two files which will be linked together and executed .
a.c: int i;
main()
{
i = 30;
f1();
printf("%d\n",i)
}
b.c: static int f1()
{
i+=10;
}
which of the following is true ?
a) a.c will fail in compilation phase because f1() is not declared
b) b.c will fail in compilation because the variable i is not declared
c) will print 30
d) will print 40
e) a & b
ans: e

1. There are two circles, one circle is inscribed and another circle is circumscribed over a square. What is the ratio of area of inner to outer circle?
Ans: 1 : 2

2. There are 12 boys and 15 girls, How many different dancing groups can be formed with 2 boys and 3 girls. 48Which of the following fractions is less than 1/3 ?
(a) 22/62
(b) 15/46
(c) 2/3
(d) 1
Ans: (b)

3. One of Mr. Horton,his wife,their son,and Mr. Horton's mother is a doctor and another is a lawyer.
a)If the doctor is younger than the lawyer, then the doctor and the lawyer are not blood relatives.
b)If the doctor is a woman, then the doctor and the lawyer are blood relatives.
c)If the lawyer is a man, then the doctor is a man.
Whose occupation you know?
Ans: Mr. Horton:he is the doctor.

4. A person wants to buy 3 paise and 5 paise stamps costing exactly one rupee. If he buys which of the following number of stamps he won't able to buy 3 paise stamps.
Ans: 9

5. Mr. and Mrs. Aye and Mr. and Mrs. Bee competed in a chess tournament.Of the three games played:
a)In only the first game werethe two players married to each other.
b)The men won two games and the women won one game.
c)The Ayes won more games than the Bees.
d)Anyone who lost game did not play the subsequent game.
Who did not lose a game?
Ans:Mrs.Bee did not lose a game.

6. Two cars are 15 kms apart. One is turning at a speed of 50kmph and the other at 40kmph . How much time will it take for the two cars to meet?

Ans: 3/2 hours

7. In june a baseball team that played 60 games had won 30% of its game played. After a phenomenal winning streak this team raised its average to 50% .How many games must the team have won in a row to attain this average?
A. 12
B. 20
C. 24
D. 30
Ans: C

8. M men agree to purchase a gift for Rs. D. If three men drop out how much more will each have to contribute towards the purchase of the gift/
A. D/(M-3)
B. MD/3
C. M/(D-3)
D. 3D/(M2-3M)
Ans: D

9. A company contracts to paint 3 houses. Mr.Brown can paint a house in 6 days while Mr.Black would take 8 days and Mr.Blue 12 days. After 8 days Mr.Brown goes on vacation and Mr. Black begins to work for a period of 6 days. How many days will it take Mr.Blue to complete the contract?
A. 7
B. 8
C. 11
D. 12
Ans:C

10. 2 hours after a freight train leaves Delhi a passenger train leaves the same station travelling in the same direction at an average speed of 16 km/hr. After travelling 4 hrs the passenger train overtakes the freight train. The average speed of the freight train was?
A. 30
B. 40
C.58
D. 60
Ans: B

11. If 9x-3y=12 and 3x-5y=7 then 6x-2y = ?
A.-5
B. 4
C. 2
D. 8
Ans: D

12. There are 5 red shoes, 4 green shoes. If one draw randomly a shoe what is the probability of getting a red shoe
Ans: 5c1/ 9c1


13. If 20 men can build a wall 56m long in 6 days, then what length of a similar wall can be built by 35 men in 3 days?
Ans : 49

14. If m power n = 121, then what is the value of (m-1) power (n+1)?
Ans : 1000

15. At 12 noon, Both hands of a clock meet together. After how many minutes can they meet again?
Ans : 65:45min

16. The average of first 50 natural numbers?
Ans : 25.5

17. There is 20 litre solution containing 10% water and 90% spirit. How much water should be added to make the solution containing 25% water?
Ans : 4 litres.

18. There are 20,6 and 9 rupees notes. you have to form 99 rupees with minimum number of notes. At what minimum number of notes you can achieve this?
Ans : 8

19. 0.8 portion of a tank is filled with water. If 25 litres of water is taken out from the tank, 14 litres of excess water over the half filled up tank remains in it. Find the capacity of the tank.
(a) 100 litres
(b) 130 litres
(c) 200 litres
(d) 150 litres

20. The ratio of ages of two persons is 4 : 7 and one is 30 years older than the other. Find the sum of their ages.
(a) 210 years
(b) 110 years
(c) 90 years
(d) 140 years

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Answered By StudyChaCha Member