Placement Papers - HCL

HCL TECHNOLOGIES PAPER (C PROGRAMMING)

1. Which of the following about the following two declaration is  true
 i ) int *F()
 ii) int (*F)()
 
 Choice :
 a) Both are identical
 b) The first is a correct declaration and the second is wrong
 c) The first declaraion is a function returning a pointer to an  integer  and the
 second is a pointer to function returning int
 d) Both are different ways of declarin pointer to a function
 
 Answer : c) The first de.
 
 2. What are the values printed by the following program?
 #define dprint(expr) printf(#expr "=%d ",expr)
 main()
 {
 int x=7;
 int y=3;
 dprintf(x/y);
 }
 
 Choice:
 a) #2 = 2 b) expr=2 c) x/y=2 d) none
 
 Answer: c)x/y=2
 
 3. Which of the following is true of the following program
 main()
 {
 char *c;
 int *p;
 c =(char *)malloc(100);
 ip=(int *)c;
 free(ip);
 }
 
 ans: The code functions properly releasing all the memory  allocated
 
 
 4.output of the following.
 main()
 {
 int i;
 char *p;
 i=0X89;
 p=(char *)i;
 p++;
 printf("%x ",p);
 }    
 ans:0X8A
 
 5. which of the following is not a ANSI C language keyword?
 ans:Function.
 
 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 funciton cannot  change the original value in the array
 c) It results in compilation error when the function tries to  access the elements in the array
 d) Results in a run time error when the funtion tries to access  the elements in
 the array
 Answer: a) The fu..
 
 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
 Answer : d)float
 
 8.What is the value of the expression (3^6) + (a^a)?
 a) 3 b) 5 c) 6 d) a+18 e) None
 Answer : 5
 
 9. What is the value assigned to the variable X if b is 7 ?
 X = b>8 ? b <<3 : b>4 ? b>>1:b;
 a) 7 b) 28 c) 3 d) 14 e) None
 ans: 3;
 
 10. Which is the output produced by the following program
 main()
 {
 int n=2;
 printf("%d %d ", ++n, n*n);
 }
 
 a) 3,6 b) 3,4 c) 2,4 d) cannot determine
 
 Answer : b) 3,4
 
 11. What is th output of the following program?
 int x= 0x65;
 main()
 {
 char x;
 printf("%d ",x)
 }
 
 a) compilation error b) 'A' c) 65 d) unidentified
 
 12. What is the output of the following program
 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
 
 Answer : d) 3,7
 
 13. What can be said of the following program?
 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
 
 Answer: b) Prints : Jan..
 
 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) unidentified
 
 Answer: d) NULL
 
 15. What is the output of the following program?
 
 main()
 {
 int l=6;
 switch(l)
 { default : l+=2;
 case 4: l=4;
 case 5: l++;
 break;
 }
 printf("%d",l);
 }
 a)8 b)6 c)5 d)4 e)none
 
 Answer : c)5
 
 16. What is the output of the following program?
 main()
 {
 int x=20;
 int 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
 
 Answer:d)10,22
 
 17. What is the output of the following problem ?
 #define INC(X) X++
 main()
 {
 int X=4;
 printf("%d",INC(X++));
 }
 
 a)4 b)5 c)6 d)compilation error e) runtime error
 
 Answer : d) compilation error
 
 
 18. what can be said of the following
 
 struct Node {
 char *word;
 int count;
 struct Node left;
 struct Node right;
 }
 
 a) Incorrect definition
 b) structures cannot refer to other structure
 c) Structures can refer to themselves. Hence the statement is  OK
 d) Structures can refer to maximum of one other structure
 
 Answer :c)
 
 19. What is the size of the following union.
 Assume that the size of int =2, size of float =4 and size of
 char =1.
 Union Tag{
 int a;
 flaot b;
 char c;
 };
 
 a)2 b)4 c)1 d) 7
 
  20) What is the output of the following program? (has been used to indicate a
 space)
 main()
 {
 char s[]="Hello,.world";
 printf(%15.10s",s);
 }
 
 a)Hello,.World.
 b).Hello,.Wor
 c)Hello,.Wor..
 d)None of the above
 
 (1) The combined length of the longer two pieces of rope is 12 metres.
 (2) The combined length of the shorter two pieces of rope is 11 metres.
 
 (A) (B) (C) (D) (E)
 
 10) A certain company paid bonuses of Rs. 125 to each of its executive emplyees and Rs 75 to each of its nonexecutive employees. If 100 of the employees were nonexecutive, how many were executive?
 1) The company has a total of 120 employees
 2) The total amount that the company paid in bonuses to its  employees was
 Rs.10,000
 
 (A) (B) (C) (D) (E)
 
 11. What fraction of his salary did Mr. Johnson put into savings  last week ?
 1) Last week Mr.Johnson put Rs 17 into savings.
 2) Last week Mr.Johnson put 5% of his salary into savings.
 
 (A) (B) (C) (D) (E)
 
 12. Each M-type memory unit will increase the base memory  capacity of a  certain computer by 3 megabytes. What is the base memory capacity, in  megabytes, of the computer ?
 1) 2 M-type memory units will increase the computer's base  memory capacity by 300%
 2) The memory capacity of the computer after 2-M type memory  units are  added to the base memory capacity, is 1.6 times the memory capacity of  the computer after 1 M-type unit is added to the base memory capacity.
 (A) (B) (C) (D) (E)
 
 13. What fractional part of the total surface area of cube C is  red?
 1) Each of 3 faces of C is exactly 1/2 red
 2) Each of 3 faces of C is entirely white
 (A) (B) (C) (D) (E)
 
 
 SECTION C
 
 Instructions ALL NUMBER USED ARE REAL NUMBERS FOLLOWING
 EACH QUESTIONS ARE FIVE POSSIBLE ANSWERS LABELED
 A).B).C).D)&E).TICK THE BEST CHOICE.
 
 14. How many of the integers between 25 and 45 are even ?
 (A)21 (B)20 (C)11 (D)10 (E)9
 
 Answer:d)10
 
 15. If taxi fares were Rs 1.00 for the first 1/5 mile and Rs  0.20 for each 1/5 miles thereafter. The taxi fare for a 3-mile ride was
 (A)Rs 1.56 (B)Rs 2.40 (C)RS 3.00 (D)Rs 3.80 (E)Rs 4.20
 
 Answer :d)Rs 3.80
 
 16. A computer routine was developed to generate two numbers (x,y) the first being a random number between 0 and 100 inclusive, and the second being less than or equal to the square root of the first. Each of the following pair satisfies the routine EXCEPT
 
 (A) (99.10) (B) (85.9) (C) (50.7) (D) (1.1) (E) (1.0)
 
 Answer : A) (99.10)
 
 17. A warehouse had a square floor with area 10,000 sq.meters.  A rectangular
 addition was built along one entire side of the warehouse that increased the  floor by one-half as much as the original floor. How many meters did  the addition extend beyond the original buildings ?
 (A)10 (B)20 (C)50 (D)200 (E)500
 
 Answer: c)50
 
 18. A digital wristwatch was set accurately at 8.30 a.m and then  lost 2 seconds every 5 minutes. What time was indicated on the watch at 6.30  p.m of the same day if the watch operated continuously that time ?
 (A)5:56 B)5:58 (C)6.00 (D)6.23 (E)6.26
 
 Answer :E) 6.26
 
 19) A 5 litre jug contains 4 litres of a salt water solution  that is 15 percent salt. If 1.5 litres of the solution spills out of the jug, and  the jug is then filled to capacity with water, approximately what percent of  the resulting solution in the jug is salt?
 
 (A)7.5% (B)9.5% (C) 10.5% (D)12% (E)15%
 
 Answer :A)7.5%
 
 20) A plane travelled K miles in the first 96 miles of flight  time. If it completed the remaining 300 miles of the trip in 1 minute, what  was its average speed in miles per hour for the entire trip ?
 (A)
 (B)
 (C)
 (D)
 (E)
 
 Answer :(300+k)/97 * 60
 
 21) A merchant sells an item at a 20 percent discount. but still  makes a gross  profit of 20 percent of the cost. What percent of cost would be  gross profit on  the item have been if it had been sold without the discount?
 
 (A)20% (B)40% (C)50% (D)60% (E)66.6%
 
 Answer :c) 50%
 
 22) A millionaire bought a job lot of hats 1/4 of which were  brown. The millionaire sold 2/3 of the hats including 4/5 of the brown  hats. What fraction of the unsold hats were brown.
 
 (A)1/60 (B)1/15 (C)3/20 (D)3/5 (E)3/4
 
 Answer :c)3/20
 
 23) How many integers n greater than and less than 100 are there  such that, if the digits of n are reversed, the resulting integer is n+9 ?
 
 (A)5 (B)6 (C)7 (D)8 (E)9
 
 Answer :D)8
 
 24) An investor purchased a shares of stock at a certain price.  If the stock increased in price Rs 0.25 per share and the total increase for  the x shares was Rs 12.50, how many shares of stock had been purchased ?
 
 (A)25 (B)50 (C)75 (D)100 (E)125
 
 Answer :B)50
 
 25) At a special sale, 5 tickets can be purchased for the price  of 3 tickets.
 If 5 tickets are purchased at the sale, the amount saved will be  what percent of
 the original price of the 5 tickets?
 
 (A)20% (B)33.3% (C)40% (D)60% (E)66.6%
 
 Answer :c)40%
 
 26) Working independently, Tina can do a certain job in 12  hours. Working  independently, Ann can do the same job in 9 hours. If Tina  works independently at the job for 8 hours and then Ann works independently, how  many hours will it take Ann to complete the remainder of the jobs?
 
 (A)2/3 (B)3/4 (C)1 (D)2 (E)3
 
 Answer :E)3
 
 27) A decorator bought a bolt of d
 
 m number of red chips in any one stack ?
 
 (A)7 (B)6 (C)5 (D)4 (E)3
 
 Answer :C) 5
 

SECTION III - ANALYSIS PROGRAM SEGMENTS
 ---------------------------------------
 
 1) 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 funtion 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) It does..
 
 2) 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
 
 03) What is printed when this program is executed
 main()
 {
 printf ("%d ",f(7));
 }
 f(X)
 {
 if (x
<= 4)
 return x;
 return f(--x);
 }
 
 a) 4
 b) 5
 c) 6
 d) 7
 ans: a
 
 04) 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 ",x,p);
 }
 
 a) 1 and 1 is printed
 b) 1 and 4 is printed
 c) 4 and 4 is printed
 d) causes an exception
 
 05) 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
 
 6) 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