HCL Placement Papers
HCL TECHNOLOGIES INDIA
PRIVATE LIMITED
HCL System Software Sample Test Paper
NOTE : This is a system paper and not application paper
Section 1- General Computer Concepts
1. Piggy backing is a technique for
a) Flow control
b) Sequence
c) Acknowledgement
d) retransmition
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
15.which of the following is a feature of the ANSI C
language and not present in Java?
a)forward referencing
b)variable length argument lists
c)volatile modifier
d)none of the above
ans: (b)
section 2 - C Programming
1.which of the following about the following two
declarations is true
i) int *F();
ii)int (*F)();
a)Both are identical
b)the first is a correct declaration and second is
wrong
c) the first declaration is a function returning a
pointer to an integer and the second is a pointer
to
a
function returning int
d)Both are different ways of declaring pointer to a
function
ans : (c)
2.what are the values printed by the following
program?
#define dprintf(expr) printf(#expr=%d\n",expr)
main()
{
int x=7;
int y=3;
dprintf(x/y);
}
a)#2=2 b)expr=2 c)x/y=2 d)none
ans ( c)
3.which of the following is true of the following
program
main()
{
char *c;
int *ip;
c=(char *)malloc(100);
ip=(int *)c;
free(ip);
}
a)the code functions properly by releasing all the
memory allocated
b)results in compilation error as a pointer of
various
types cannot be equated
c)the program ties to free more memory than
allocated
and results in run time error
d) works well except when the machine runs low on
memory and malloc is unabel to allocate the memory
ans : (d)
4.output
main()
{
int I;
char *p;
i=0x89;
p=(char *)i;p++;
printf("%x\n"p);
}
a)0x8c b)0x4566788A c)0x8A d)0x8B e)none
5.which of the following is not an ANSI c language
keyword?
a)volatile b)function c)default d)const e)void
ans; (b)
6.when an array is passed as parameter to a function
,which of the following statement is correct
a)the function can change values in the original
array
b)in c parameters are passed by value . the function
cannot change the original value in the array
c)it results in compilation error.Array cannot be
passed as a parameter to a function
d)results in runtime error when the function tries
to
access the elements in the array
7.the type of the controlling expression of a switch
statement cannot be of the type
a)int b)char c)short d)float e)none
ans (d)
8.value of (3^6)+(a ^a)=?
Ans :value=5
9. x= b>8?b<<3:b>4?b>>1:b;
ans: x=3
10.output:
main()
{
int n=2;
printf("%d %d\n"++n,n*n);
}
a)3,6 b)3,4 c)2,4 d)cannot determine
ans :( b)
11.output:
int x=0x65;
main()
{
char x;
printf("%d\n",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 definiton
b)structures cannot refer to other structrues
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)
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("%d\n",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 %d\n",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);
}
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 )
9. #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
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)woment 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
Qestions 16-20
Six knights - P,Q,R,S,T and U - assemble for a long
journey in two travelling parties. For security,
each
travelling 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 travelling parties before continuing, again in
two parties along separate northern and southern
routes. Throughout the entire trip , the composition
of travelling 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 memebers 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 travelling pary 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 consisits 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 travelling party to the other travelling party
,that knight must be
a)P
b)Q
c)R
d)S
e)T
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