HCL Placement Papers - I
1. Which of the following involves context switch,
(a) system call
(b) priviliged instruction
(c) floating point 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
Ans: (b)
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. Question related to java
8. OLE is used in
a) inter connection in unix
b) interconnection in WINDOWS
c) interconnection in WINDOWS NT
9. Convert a given HEX number to OCTAL
10. Macros and function are related in what aspect?
(a)recursion
(b)varying no of arguments
(c)hypochecking
(d)type declaration
11.Preproconia.. does not do which one of the following
(a) macro
(b) conditional compliclation
(c) in type checking
(d) including load file
Ans. (c)
12. Piggy backing is a technique for
a) Flow control
b) Sequence
c) Acknowledgement
d) retransmission
Ans. (c)
13. In signed magnitude notation what is the minimum value that can be represented with 8 bits
(a) -128
(b) -255
(c) -127
(d) 0
14. 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) &a
HCL Placement Papers - II
Section 1- General Computer Concepts
1. Piggy backing is a technique for
a) Flow control
b) Sequence
c) Acknowledgement
d) retransmission
Ans. (c)
2. In OSI, terminal emulation is done in
(a) sessions layer
(b) application layer
(c) presentation layer
(d) transport layer
Ans: (b)
3.Bit parity check,when performed on a byte ,can
catch
a)odd number of errors
b)even number of errors
c)any number of errors
d)none of the above
Ans: (a)
4. In signed magnitude notation what is the minimum
value that can be represented with 8 bits
(a) -128
(b) -255
(c) -127
(d) 0
Ans: (c)
5. For 1 MB memory, the number of address lines
required,
(a)11
(b)16
(c)20
(d) 24
Ans. (c)
6.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
Ans: (a)
7. Semaphore is used for
(a) synchronization
(b) dead-lock avoidence
(c) both a and b
(d) none
Ans. (c)
8. 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)
9.Virtual address are translated to physical
address by
(a)the process
(b)operating system
(c)MMU
(d)All of the above
(e) None of the above
10.convert the hexadecimal number 0xFEDB to the
octal
(a) 177333
Ans: (a)
11. OLE is a mechanism
a) in UNIX for network communication
b) in INTERNET for communication between nodes
c) for communication between processes in a NT system
d) used as a network layer protocol in NT & Windows
systems
12. an internet IP address of a node
a) has to be unique only for the domain of the node
b) has to be unique in the node's sub-network
c) has to be unique in the country in which the node
is present
d) none of the above
13. There is an employee table with key feilds as
employer no.data in every n'th row are needed for a
sample. Which of the following queries will get
required results.
a) select A employe no. from employe A , where
exists (select (max (emp_no)))from employe B
where A employe no. >= B employe having (count(*)
mod
n)=0
b) select employe no. from employe A, employe B
where A.employe no.>=B employ no.group by employe
no.having(count(*) mod n)=0 )
c) both a& b
d)none of the above
Ans: (d)
14. Type duplicates of a row in a table customer
with
non unique key feild customer no. can use
a) delete from costomer where customer no. exists(
select distinct customer no. from customer having
count )
b) delete customer a where customer no. in (select
cust_no from customer b where a.cust_no=b.cust_no)
and
a.rowid>b.rowid
c) delete customer a where custermor no. in ( select
customer no. from customer a, customer b group by
a.cust_no
having (count(*)>1) and a.rowid>b.rowid);
d) none of the above
HCL Placement Papers - III
11.output:
int x=0x65;
main()
{
char x;
printf("%dn",x);
]
a) compilation error b)'A' c)65 d) undefined
12.output
main()
{
int a=10;
int b=6;
if(a=3)
b++;
printf("%d %d",a,b++);
}
a)10,6 b)10,7 c)3,6 d)3,7 e)none
13.main()
{
enum months {jan=1,feb,mar,apr};
months x=jan;
if(x==1)
printf("jan is the first month");
}
a)does not print anything
b)prints : jan is the first month
c)generates compilation error
d)results in runtime error
14.what is the output of the following program?
Main()
{
char *src="hello world";
char dst{100];
strcpy(src,dst);
printf("%s",dst);
}
strcpy(char *dst,char *src)
{
while (*src) *dst++=*src++;
}
a)"hello world" b)"hello" c)"world" d)NULL
e)undefined
15.main()
{
int i=6;
switch(i)
{
default: i+=2;
case 4;i=4;
case 5:i++;
break;
}
printf("%d",i);
}
a)8 b)6 c)5 d)4 e)none
16.main()
{
int x=20;
itn y=10;
swap(x,y);
printf("%d %d",y,x+2);
}
swap(int x,int y)
{
int temp;
temp=x;
x=y;
y=temp;
}
a)10,20 b)20,12 c)22,10 d)10,22 e)none
17.#define INC(x) x++
main()
{
int x=4;
printf("%d",INC(x++));
}
a)4 b)5 c)6 d)compilation error e)runtime
error
18.struct node{
char *word;
int count;
struct node left;
struct node right;
};
a) incorrect definition
b)structures cannot refer to other structures
c)structures can refer to themselves. Hence the
statement is ok
d)structures can refer to maximum of one other
structure
19.what is the size of the following union
union tag{
int a;
float b;
char c;
};
a)2 b)4 c)1 d)7
Ans : (b)
20. main()
{
char s[]="hello world";
printf("%15.10s",s);
}
a)hello,.world...
b).....hello world
c)heloo,.wor.....
d)none of the above
Ans: (b)
HCL Placement Papers - IV
Section C - analysing program segements
1)struct dlink{
int nodeid;
struct dlink *next;
struct dline *prev;
} dlink_t;
A pointer to the head of tha linked list is
maintained
as a global variable whose definition is
dlink_t *head;
The function remove_element(dlink_t*rp), needs to
remove the node pointed to by rp and adjust the head
The first node's prev and the last node's text 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
function remove_element
a)it works when head is the same as rp;
b)it does not work whe rp is the last element on the
list
c)it sets the head of the list correctly
d)it works in all cases
Ans: (b)
2.#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
searches 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 contains the
character c
c)works when c is a non NULL character array
d)works only when the character c is found in the
string
3.main()
{
printf("%dn",f(7));
}
f(x)
{
if(x<=4)
return x;
return f(--x);
}
a)4
b)5
c)6
d)7
4.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 %dn",p);
}
a) 1 and 1 is printed
b) 1 and 4
c) 4 and 4
d) causes an exception
5.which is correct?
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);
}
HCL Placement Papers - V
6. 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)55 and 55
e)35 and 35
Ans : ( c )
7.int
func(int x)
{
if(x<=0)
return (1);
return func(x-1)+x;
}
main()
{
printf("%d",func(5));
}
a)12 b)16 c)15 d)11
8.consider the following fragments of c code in two
files which will be linked together and executed
a.c
int i;
main()
{
i=30;
f1();
printf("%d",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
d)a & b
9. void
funca(int *k)
{
*k+=20;
}
void
funcb(int *k)
{
int m=*x,*n=&m;
*n+=10;
}
main()
{
int var=25,;
*varp=&var;
funca(varp)
*varp+=10;
funcb(varp);
printf("%d%d,var,*varp);
}
(a) 20,55(b) 35,35(c) 25,25(d)55,55
Ans : (d)
10. #include <stream.h>
class x{
public :
int a;
x();
};
x::x() { a=10;cout<< a ;}
class b:public x {
public :
b(); x();
};
b::b() { a=20;cout<<a;}
main()
{
b temp;
}
what will be the output of the following program?
a)10 b)20 c)20 10 d)10 20
Section 4 - General Aptitude Section
1. In a murder case there are four suspects
P,Q,R,S.
Each of them makes a statement . They are
P : I had gone to the theatre with S at the time of
the murder
Q: I was playing cards with P at the time of the
murder
R: Q did not commit the murder
S: R is not the murdere
Assuming that only one of the above statement is
false
and that one of them is the murderer,who is the
murderer?
a)p b)Q c)R d)cannot be concluded e)S
2.Mohan earned twice as much and deep.Yogesh earned
Rs.3/- more than half as much as deep.If the amounts
earned by mohan,deep and yogesh are M,D and y
respectively which of the following is the correct
ordering of these amounts?
a)M<D<Y
B)M<Y<D
C)D<M<Y
D)it cannot be determined from the information given
e)D<Y<M
HCL Placement Papers - VI
Section 4 Contd...
3.Statistics indicate that men drivers are involved
in more accidents than women drivers. Hence it may be
concluded that
a) sufficient information is not there to conclude
anything
b) men are actually better drivers but drive more
frequently
c) women certainly drive more cautiously than men
d) men chauvinists are wrong about women's abilities
e) statistics sometimes present a wrong picture of things
4.convert hex number 0xE78 to radix 7
Ans : 13541
5.given that A,B,C,D,E represent one of the digits
between 1 and 9 and that the following multiplication holds
ABCDE X4=EDCBA
Which digit does E represent?
a)4 b)6 c)8 d)7 e)insufficient data provided
6.HCL photocopying machine can make 10 copies every
4 seconds. At this rate,how may copies can the machine make in 6
minutes?
a)900
b)600
c)360
d)240
e)150
Ans : (a)
7. if a=2 , b=4 ,c=5 then
(a+b)/c - c/(a+b)=?
Ans : 11/30
8.10^2 (10 ^8 +10 ^8)/ 10^4=?
Ans : 2(10^6)
9.worker W produces n units in 5 hours.Workers V and
W,working independently but at the same time produce
n units in 2 hours. How long would it take V alone to
produce n units?
Ans : 3 hr 20 min
10 . If q#0 and k=(rq/2) - s ,then what is r in
terms
of k,q ans s?
Ans : 2(k+s)/q
1.A causes B or C ,but not both
2.F occurs only if B occurs
3. D occurs if B or C occurs
4.E occurs only if C occurs
5.J occurs only if E or F occurs
6.D causes G,H or both
7.H occurs if E occurs
8.G occurs if F occurs
11) if A occurs which of the following may occur?
I . F and G
II. E and H
III.D
a)I only
b)II only
c)III only
d) I & II & III
e)I & II or II & III but not both
12. If B occurs which must occur?
a)D
b)D and G
c)G and H
d)F and G
e)J
13. if J occurs ,which must have occurred?
a)E
b) Either B or C
c)both E & f
d)B
e) Both B & C
14. which may occur as a result of a cause not
mentioned?
I.D
II.A
III.F
a) I only
b) II only
c) I & II
d) II & III
e) I , II & III
15. If E occurs which one cannot occur?
a)A
b)F
c)D
d)C
e)J
Questions 16-20
Six knights - P,Q,R,S,T and U - assemble for a long
journey in two traveling parties. For security,
each traveling party consists of at least two knights
.The two parties travel by separate routs, northern
and southern .After one month ,the routes of the
northern and southern groups converge for a brief time and at
that point the knights can if they wish ,rearrange
their traveling parties before continuing, again in
two parties along separate northern and southern
routes. Throughout the entire trip , the composition
of traveling parties must be in accord with the
following conditions:
P and R are deadly enemies and although they may
meet briefly can never travel together.
P must travel in the same party with S
Q cannot travel by the southern route
U cannot change routes
16. If one of the two parties of knights consists of
P and U and two other knights and travels by the
southern route, the other members of this party
besides P and U must be
a)Q and S
b)Q and T
c)R and S
d)R and T
e)S and T
17.if each of the two parties of knights consists of
exactly three members, which of the following is not
a possible traveling party and route?
a)P,S,U by the northern route
b)P,S,T by the northern route
c)P,S,T by the southern route
d)P,S,U by the southern route
e)Q,R,T by the northern route
18.if one of the two parties of knights consists of
U and two other knights and travels by the northern
route, the other members of this party besides U must be
a)P and S
b)P and T
c)Q and R
d)Q and T
e)R and T
19.if each of the two parties of knights consists of
exactly three members ,S and U are members of
different parties and R travels by the northern route
then T must travel by the
a)southern route with P and S
b)southern route with Q and R
c)southern route with R and U
d)northern route with Q and R
e)northern route with R and U
20. if when the two parties of knights encounter one
another after a month exactly one knight changes
from one traveling party to the other traveling party, that knight must be
a)P
b)Q
c)R
d)S
e)T
Source: Naukri.com 
