Recent questions and answers in Programming

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1

IIIT H 2018
Assume that an integer and a pointer each takes 4 bytes. Also assume there is no alignment in objects. Predict the output #include <iostream> using namespace std; class Test{ static int x; int *ptr; int y; }; int main() { // your code goes here Test t; int a; cout<<sizeof(t)<<"\n"; cout<<sizeof(Test *); return 0; }

asked 1 hour ago in Programming by N (217 points) | 6 views

+3 votes

1 answer

2

IIITH - PGEE 2017
main() { int c=0,x,i,y; for(i=0;i<N;i++) { x=random();y=random(); if((x2+y2)<1) c++; } print(c); } random() is a function which returns random number between $0$ or $1$, $N$ is a large number what is the output of the program?

answered 1 day ago in Programming by Enyt_S (29 points) | 706 views

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1 answer

3

Static Variable
Is it static declaration or static assignment? int main() { int x=20; static int y=x; if(x==y) printf("Equal"); else printf("Not Equal"); return 0; } What is output?and why?

answered 1 day ago in Programming by debasree88 (55 points) | 121 views

+1 vote

3 answers

4

GATE2019-52
Consider the following C program: #include <stdio.h> int main() { float sum = 0.0, j=1.0, i=2.0; while (i/j > 0.0625) { j=j+j; sum=sum+i/j; printf("%f\n", sum); } return 0; } The number of times the variable sum will be printed, when the above program is executed, is _________

answered 2 days ago in Programming by Sourav Basu Active (2.4k points) | 1.9k views

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1 answer

5

Self doubt - Programming
X=2; Y=++x * ++x * ++x ; Printf("%d",Y); In the above question, we have to use the final value of x or it will be evaluated seperately and then multiplied. Ex: Y= 3*4*5; or Y=5*5*5; [closed]

answered 4 days ago in Programming by SuvasishDutta (295 points) | 78 views

+1 vote

1 answer

6

Yashavant kanetkar understanding pointer in C, Chepter 1, Question 5.
(5) Would the following program give a compilation error or warning? main() { float i = 10, *j; void *k; k=&i; j= k; printf("\n%f", *j); }

answered 4 days ago in Programming by Pragya123 (11 points) | 139 views

0 votes

4 answers

7

what is the output of foo(10)?
int foo(unsigned int n) { int c,x=0; while(n!=0) { if(n&01) x++; n>>=1; } return c; }

answered 6 days ago in Programming by pauladesh (11 points) | 185 views

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1 answer

8

what is output of program
int main(); { int a,*b,**c,***d,****e; a=10; b=&a; c=&b; d=&c; e=&d; print f(“a=%d b=%u c=%u d=%u e=%u e=%u\n”, a,b,c,d,e); print f(“ %d %d %d \n”,a,a+*b,**c+***d+,****e); return 0; }

answered Apr 12 in Programming by Satbir Loyal (5.9k points) | 53 views

–1 vote

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9

what is output
void fun(int,int*); int main() { int=-5,j=-2; fun(i,&j); print f(“i=%d j=%d\n”,i,j); return 0; } void fun(int i,int *j) { i=i*i; *j=*j * *j; }

asked Apr 12 in Programming by altamash (431 points) | 34 views

0 votes

1 answer

10

dynamic allocation doubt
What will happen if using MALLOC ( ) we allocate entire memory from heap and we don't free it using FREE( ) ? what will happen next ?

answered Apr 10 in Programming by SuvasishDutta (295 points) | 17 views

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0 answers

11

GATE 1999
Consider the following C function definition: int trial (int a,int b,int c) { if ((a>=b) && (c<b)) return b; else if (a>=b) return Trial(a,c,b); else return Trial(b,a,c); } The function Trial : A) Finds the maximum of a,b,c B) Finds the minimum of a,b,c C)Finds the middle number of a,b,c D) None of these [closed]

asked Apr 10 in Programming by Aishvarya Akshaya Vi (7 points) | 23 views

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0 answers

12

book name is" test ur c aptitude" i m not understanding 1st line of code
explain little bit more in easy way

asked Apr 8 in Programming by saket nandan Active (5.1k points) | 34 views

–2 votes

0 answers

13

book name is" test ur c aptitude"
plzzz explain how this code is executed

asked Apr 8 in Programming by saket nandan Active (5.1k points) | 52 views

0 votes

0 answers

14

ISI2017-PCB-B-2(b)
Write a $C$ program to fins all permutations of a string (having at most 6 characters). For example, a string of $3$ characters like $"abc"$ has 6 possible permutations: $”abc", "acb", "bca", "bac", "cab", "cba".$

asked Apr 8 in Programming by akash.dinkar12 Boss (39.2k points) | 24 views

0 votes

1 answer

15

#arrays
i write this program, during initialization of array i given the size as 11 means the number of elements stored in an array is 11. as we know array is not assigned a value of index 12 and above. but in in the program array a is initialized of index from 0 to 19,my question is how the array is ... i=0;i<20;i++) { a[i]=i+1; } for(i=0;i<20;i++) { printf("%d\n",a[i]); } }

answered Apr 7 in Programming by Arjun Veteran (396k points) | 63 views

+1 vote

2 answers

16

C PROGRAMMING

answered Apr 6 in Programming by Sneha redd (11 points) | 436 views

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1 answer

17

#Dynamic memory allocation malloc
how to know how much size is allocated while dynamically allocating memory to the pointer variable with malloc. i just write the below code to know the size of ptr2 after dynamically allocating memory. i want the output is 10 but it is displaying as 2 as ... allocation failed"); else{ printf("size of *ptr2 is == %d\n",(sizeof(ptr2)/sizeof(int))); } }

answered Apr 6 in Programming by srestha Veteran (111k points) | 28 views

0 votes

1 answer

18

c structures
struct node { int data1; char data2; struct node* link; }; //self referential structure *************************************** struct node { int data1; char data2; } m; int main () { struct node * ptr; return 0; } are both pointer ptr & link will do same work every where? All I need to ask is difference between self referential structure and Pointer to Structure ?

answered Apr 5 in Programming by prashant281188 (363 points) | 19 views

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1 answer

19

#userdefined Data type union in C
What is the output of the program? int main() { union a { int i; char ch[2]; }; union a u; u.ch[0] = 3; u.ch[1] = 2; printf("%d, %d, %d", u.ch[0], u.ch[1], u.i); return 0; }

answered Apr 4 in Programming by hitendra singh Active (1.8k points) | 39 views

0 votes

0 answers

20

Programming:Self Doubt
Can somebody explain this code line by line. I am unable to get and what will be it's output? #include<stdio.h> #include<stdlib.h> void transpose(int n, const double *A, double *B, const int *lda, int *perm) { } int transpose_equal(const double *A, ... , B, r_dim, r_perm); transpose_equal(A, B, total); free(A); free(B); free(B_trans); printf("\n"); } }

asked Apr 3 in Programming by srestha Veteran (111k points) | 42 views

0 votes

1 answer

21

Made easy

answered Apr 1 in Programming by logan1x (207 points) | 78 views

0 votes

1 answer

22

Self Doubt
1. #include <stdio.h> int main() { int i; char a[] = ""; // no tab space in between if(printf("%s",a)) printf("string empty"); else printf("string is not empty"); return 0; } Output: string is not empty 2. ... ;,a)) printf("string empty"); else printf("string is not empty"); return 0; } Output: string empty Why and how so?

answered Apr 1 in Programming by allSystemsDown (123 points) | 25 views

0 votes

2 answers

23

Made Easy Workbook
#include <stdio.h> int main() { int i = 258; int *iptr = &i; printf("%d",*(char*)iptr); printf("%d",*(char*)iptr+1); } Please explain the solution.

answered Apr 1 in Programming by shivamgate (11 points) | 71 views

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24

CLRS CHAPTER 25
FOR THE EXTENDED-SHORTEST-PATH if we want to find the distance between 1->4 and the 1->5 +5->4 gives the shortest path and if 1->5 gets its shortest path as 1->2->5 and 5>4 gets its shortest path as 5->3->4 then how will we get it?? as one of the operands is always from the initial array.

asked Mar 30 in Programming by Doraemon (195 points) | 13 views

+1 vote

3 answers

25

Subject Topic- Programming & DS
Which operator has higher priority between *and / in any expression how to evaluate them

answered Mar 30 in Programming by abhishekmehta4u Boss (33.4k points) | 53 views

0 votes

0 answers

26

self doubt
A directed acyclic graph has no connected components. TRUE OR FALSE???

asked Mar 30 in Programming by Doraemon (195 points) | 14 views

+1 vote

2 answers

27

c functions
#include <stdio.h> void demo() { printf("GeeksQuiz "); } int main() { demo(); return 0; } ****************************************************************************** #include <stdio.h> int main() { demo(); return 0; } void demo() { printf("GeeksQuiz "); } will both program same result?

answered Mar 30 in Programming by Infinity (11 points) | 55 views

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28

self doubt
For multiplication method in hashing the formula is h(k)=m* (KA mod 1); m=2^p, k=key , 0<A<1 My question is how does it actually works. Please explain in a detailed way.

asked Mar 29 in Programming by Doraemon (195 points) | 8 views

0 votes

0 answers

29

Allen Career Institute:Programming
Do something (x, n) { m = n, temp = 1, z = x ; while (m > 0) do { while ((m mod z) == 0) do { m = |m/2|; z = z^{2} ; } m = m – 1; } return temp ; } Complexity of the above problem $1)\Theta \left ( log n \right )$ $2)\Theta \left ( nlog n \right )$ $3)\Theta \left (n^{2} \right )$ $4)\Theta \left (n\right )$

asked Mar 28 in Programming by srestha Veteran (111k points) | 75 views

+20 votes

4 answers

30

GATE2012-49
Consider the following C code segment. int a, b, c = 0; void prtFun(void); main() { static int a = 1; /* Line 1 */ prtFun(); a += 1; prtFun(); printf( \n %d %d , a, b); } void prtFun(void) { static int a = 2; /* Line 2 */ int b = 1; a += ++b; printf( \n ... $\begin{array}{ll} \text{4} & \text{2} \\ \text{4} & \text{2} \\ \text{2} & \text{0} \\ \end{array}$

answered Mar 25 in Programming by ShamikBanerjee Junior (669 points) | 2.1k views

0 votes

1 answer

31

Pointer question-C
Anyone kindly tell the reason why the outputs are differ ? #include<stdio.h> int main() { char *ptr = "geeksforgeeks"; printf("%c\n", *&*&*ptr); getchar(); return 0; } Output-g #include<stdio.h> int main() { char *ptr = "geeksforgeeks"; printf("%s\n", *&*&ptr); getchar(); return 0; } Output-geeksforgeeks

answered Mar 24 in Programming by abhishekmehta4u Boss (33.4k points) | 70 views

+1 vote

1 answer

32

Self Doubt on scoping
int x = 5, y = 10 ; void main ( ) { int i = 2, j = 3 A (i, j); } void A (int i, int j) { int x = 10, y = 5 ; i = i + x : j = i + y : printf ("%d %d", i, j); B (i, j); } void B (int i, int j) { i ... by-name 3. call-by-need 4. call-by-value 5.Static scoping 6.Dynamic scoping Any reference for call by name and call by need Is for static coping $12,17,54$ or $12,17,59$?

answered Mar 24 in Programming by abhishekmehta4u Boss (33.4k points) | 41 views

0 votes

2 answers

33

Made Easy Subject Test 2019: Programming & DS - programming in C
void PrintValue(int n) { if (n < 0) return; else { printf(n); PrintValue(--n); PrintValue(n--); printf(n); } } Output for Print(5) ?

answered Mar 23 in Programming by Aprajita sachdev (35 points) | 79 views

+5 votes

2 answers

34

GATE2000-18
Consider the following program is pseudo-Pascal syntax program main; var x: integer; procedure Q (z: integer); begin z := z+x; writeln(z); end; procedure P (y: integer); var x: integer; begin x := y+2; Q(x); writeln(x); end begin ... is call-by-value and the scope rule is static scoping? the parameter passing mechanism is call-by-reference and the scope rule is dynamic scoping?

answered Mar 23 in Programming by abhishekmehta4u Boss (33.4k points) | 1.1k views

0 votes

0 answers

35

about array size
#include <stdio.h> // Note that arr[] for fun is just a pointer even if square // brackets are used void fun(char arr[]) // SAME AS void fun(int *arr) { unsigned int n = sizeof(arr)/sizeof(arr[0]); printf("\nArray size inside fun() is ... ********** output is confusing : need explaination how is it happening Array size inside main() is 6 Array size inside fun() is 8

asked Mar 23 in Programming by hitendra singh Active (1.8k points) | 58 views

0 votes

1 answer

36

self doubt variable scope
#include <stdio.h> /* global variable declaration */ int g = 20; int main () { /* local variable declaration */ int g ; printf ("value of g = %d\n", g); return 0; } why this printing value of g is 0 instead of garbage because g is declared which is local variable in main function. are variables inside main function by default global?

answered Mar 23 in Programming by Aprajita sachdev (35 points) | 73 views

+1 vote

1 answer

37

#operator precedence and associativity
#include<stdio.h> int x = 0; int f1() { x = 5; return x; } int f2() { x = 10; return x; } int main() { printf("%d \n", f1()); printf("%d \n", f2()); int p = f1() + f2(); printf("%d ", x); return 0; } what is the output when int p= f1()+f2(); is called and how this is came?????? thank you…!

answered Mar 18 in Programming by Lipsa Priyadarsani (35 points) | 93 views

+1 vote

0 answers

38

Geeks for Geeks : C Program
In the above 4 Statements which would print 123 as output ? Explain also.

asked Mar 16 in Programming by Ashish Roy 1 (213 points) | 86 views

+3 votes

2 answers

39

what's the error here??
#include<stdio.h> #define decode(s,t,a,m,p,e,d)m##s##u##t #define begin decode(a,n,i,m,a,t,e) int begin() { printf("hello"); }

answered Mar 15 in Programming by Gurdeep Saini Loyal (9.5k points) | 185 views

0 votes

1 answer

40

Gateforum Test Series: Programming & DS - Programming In C
Can anyone explain how will the second parameter gets passed ?

answered Mar 14 in Programming by abhishekmehta4u Boss (33.4k points) | 97 views

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