Recent questions and answers in Programming

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Virtual Gate: Programming (Array)
Consider the following declaration in two dimensional array in C. char arr[100][100]; Assuming the main memory is byte addressable and the array is stored starting from memory address $0.$ ... $4050$ Why they have not calculated it in row-major order?? Why they put it in direct multiplication??

asked 12 hours ago in Programming by srestha (247 points) | 18 views

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Virtual Gate Test Series:Programming test 2015
int main(){ int *ptr; ptr=(int*)malloc(100); printf("%d",sizeof(ptr)); return 0; } Consider the memory allocated by integer pointer $4B$. What will be output of the program?

asked 15 hours ago in Programming by srestha (247 points) | 9 views

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Virtual Gate Test Series:Programming
union u1{ int x; struct s1{ char ch1; union u2{ char ch2; short int var; }u3; }s2; }u4; Assume that object of type char , short int and int takes $1B,2B,4B$ respectively. The memory required for variable $u4$ is ________ Bytes. See here memory ... (2B) So total memory created will be 4+1+2=7B, isnot it?? But answer given 4B , Plz tell me where am I missing??

asked 15 hours ago in Programming by srestha (247 points) | 7 views

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predict the output
#include <stdio.h> int fun(char *str1) { char *str2 = str1; while(*++str1); return (str1-str2); } int main() { char *str = "altamash"; printf("%d", fun(str)); return 0; } (a) 10 (b) 9 (c) 8 (d) Random Number

answered 2 days ago in Programming by altamash (139 points) | 13 views

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Programming : Self doubt
1)void main(int n){ if(n==0) return; main(--n); printf("%d",n); //return n; this line maynot exists } 2)void main(int n){ if(n==0) return; main(n--); printf("%d",n); //return n; this line maynot exists } Suppose when $n=4$ Here, 2nd program will print infinite loop. right?? What 1st program will print 1,2,3 or 1,1,1. ??

asked 3 days ago in Programming by srestha (247 points) | 26 views

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Programming:Self Doubt
Plz. tell me , why this program will give infinite looping , when we r calling bar(3)?? int bar(int val) { int x = 0; while(val > 0) { x= x + bar(val-1); } return val; } Here, x=0+bar(3)+bar(2)+bar(1), then will it not terminate??

answered 3 days ago in Programming by Satbir (1k points) | 45 views

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array self doubts
{ char str1[] = "altamashs"; char str2[] = {'a', 'l', 't', 'a', 'm', 'a', 's', 'h', 's'}; int n1 = sizeof(str1)/sizeof(str1[0]); int n2 = sizeof(str2)/sizeof(str2[0]); printf("n1 = %d, n2 = %d", n1, n2); return 0; } IN str1 we should consider null so its length=10 and in str2 only given so length=9

asked 3 days ago in Programming by altamash (139 points) | 4 views

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C PROGRAMMING QS
What will be the output of the following program? #include<stdio.h> int print 1(void) { static int x=10; x+=5; return x; } int print 2(void) { static int x X=10; x+=5; return x; } int main() { int x; x=print 1(); x+=print 1(); x+=print 2(); x+=print 2(); printf(“%d”,x); return 0; }

asked 3 days ago in Programming by Ritabrata Dey (242 points) | 9 views

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Virtual Gate :Programming question
Assume that there are two lower triangular matrices $A$ and $B$ of size $n*n$. If matrix $A$ and transpose of $B$ are fit into a rectangular matrix $C$ of size $n*(n+1)$, then $B[i,j]=C[i,j+1]$ $B[i,j]=C[j+1,i]$ ... $1$ position in new matrix. right?? So, Ans $2)$ right??

asked 3 days ago in Programming by srestha (247 points) | 8 views

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Why the output is 14?
Caption

answered 4 days ago in Programming by Satbir (1k points) | 16 views

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If first sorted list has m element,second sorted list has n element,then what is the total maximum mergable sequence?

asked 4 days ago in Programming by Specledace (102 points) | 10 views

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Which data strucure will overflow even if the number of element is less than its size?

asked 4 days ago in Programming by him0000 (107 points) | 15 views

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Self Doubt: Programming-Array
Differentiate between two lines: !array[i]==0 and array[i]!=0 Also tell me , How 1st one evaluate? is it like $!\left ( array[i]==0 \right )$ or $\left ( !array[i] \right )==0$ Which one correct??

answered 4 days ago in Programming by Pavan Shetty (107 points) | 22 views

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Self Doubt #c #scanf #printf
I have some conceptual doubts regarding working of scanf and printf in c i am listing below pls pls clear my doubts scanf( format string , arg1,arg2,arg3 ) and printf( format string , arg1,arg2,arg3 ) . how can scanf and printf take ... what does it actually mean by a format or conversion specifier? 4)How we can have any no of format specifiers inside format string?

asked 4 days ago in Programming by debasree88 (104 points) | 5 views

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self doubt #getchar
Can somebody explain me how getchar works? in a simple way… pls give me a pictorial explanation..pls pls

asked 4 days ago in Programming by debasree88 (104 points) | 4 views

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In tree construction which is the suitable efficient data structure? (Array, Linked list, Stack, Queue)

asked 4 days ago in Programming by shlokwalia (102 points) | 5 views

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Doubt in Pointers Concept
struct test { int i; char *c; }st[] = {5, "become", 4, "better", 6, "jungle", 8, "ancestor", 7, "brother"}; struct test *p = st; Can anybody explain me why p++->c => (p++)→c and why not p++→c => (p→c)++ ; since → has highest precedence than ++

asked 4 days ago in Programming by Pavan Shetty (107 points) | 5 views

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Doubt regarding constant pointer and pointer to constant

asked 4 days ago in Programming by DukeThunders (208 points) | 12 views

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Programming doubt
While we writing code like this if(NULL==x) ‘x’ can be a character variable or integer variable, why is it not showing lvalue error?? How NULL is reprsenting here??

asked 4 days ago in Programming by srestha (247 points) | 10 views

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what will be the output
void recursion(int n) { if(n > 0) { recursion(n-2); printf("%d ", n); recursion(n - 2); } } int main() { recursion(6); return 0; }

answered 5 days ago in Programming by Rudr Pawan (419 points) | 14 views

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2 answers

lvalue reqired in c
#include<stdio.h> int main() { int i=1; printf("%d",(++i)++); return 0; } plzz explian in brief.

answered 6 days ago in Programming by kd..... (106 points) | 15 views

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C programming:Made Easy Test Series doubt
#include<stdio.h> void Run(int n){ int d=0; printf("%d",n); printf("%d",d++); if(--n>1){ Run(n--); } printf("%d",d); } void main(){ Run(3); } Here my problem is when Run(n--) executed, will it show it’s effect of post-increment after again Run(n--) started??

answered 6 days ago in Programming by Debargha Bhattacharj (1.3k points) | 21 views

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Is Preorder is same as depth first search ?

answered 6 days ago in Programming by Rudr Pawan (419 points) | 7 views

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quick sort:pivot as first element
#include <stdio.h> #include <conio.h> //partioning algorithm recusively //low =starting index //high=ending index void swap(int *x,int *y) { int temp=*x; *x=*y; *y=temp; } int partition(int A[],int low ,int high) { int pivot=A[low]; ... ;,A[i]); printf("\n"); } return 0; } output: 3 4 5 8 Kindly help someone why I am getting this output?

asked 6 days ago in Programming by val_pro20 (106 points) | 4 views

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Self Doubt:Array
char arr[6]={10,20,30,40,50,60}; Now, here character array of size $6,$ i.e. only $6$ Bytes allocated in memory. But if we take each integer size $2$ Byte, then atleast $12$ Bytes required in memory to store array. Then all $6$ integer element stores in $6B$ instead of $12$B. How is it possible??

asked 6 days ago in Programming by srestha (247 points) | 14 views

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Self Doubt on Sizeof Operator
What is the data-type returns by sizeof(char *a) generally. Is it int or unsigned int??

asked Aug 16 in Programming by srestha (247 points) | 19 views

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Sorting :ME-Code self-doubt
Given a code segment , and we have to identify , which sorting is it? Now, my doubt is coming that, how swapping works for $3$ variables??

answered Aug 15 in Programming by Debargha Bhattacharj (1.3k points) | 43 views

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Self Doubt: DSA
How to solve these types of questions quickly? It take nearly 5 to 6 mins for me to solve these questions, any short method will be of much help.

asked Aug 14 in Programming by Hirak (1.3k points) | 10 views

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Bucket Sort: Coding Self doubt
#include<stdio.h> void Bucket_Sort(int array[], int n) { int i, j; int count[n]; for(i=0; i < n; i++) { count[i] = 0; } for(i=0; i < n; i++) { (count[array[i]])++; } for(i=0,j=0; i < n; i++) { for(; ... ;i<num;i++) { printf("%d ", array[i]); } printf("n"); return 0; } Why in this bucket sort , getting runtime error?? Plz. check

asked Aug 13 in Programming by srestha (247 points) | 20 views

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Input Output C programming
main ( ) { int abc ( ); abc ( ); (*abc) ( ); } int abc ( ) { printf (“come”);} (a) results in a compilation error (b) prints come come (c) results in a run-time error (d) prints come

answered Aug 12 in Programming by Shiva Sagar Rao (178 points) | 12 views

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gate cs mock 2018
#include<stdio.h> int fun(char *str1) { char *str2=str1; while(*++str1) return(str1-str2); } int main() { char *str="geeksquiz"; printf("%d",fun(str)); return 0; } this question is from geeksforgeeks.com in that the answer is ‘9’ but i compiled in gnu gcc compiler the answer is ‘1’ how?

answered Aug 12 in Programming by Shiva Sagar Rao (178 points) | 8 views

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Programming and Dsvc c
What is the minimum temporary variables are need for swap of two numbers? A)1 B)2 C)0 D) None

answered Aug 12 in Programming by Hirak (1.3k points) | 12 views

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Ace Engineering booklet
Suppose that a hash table contains hash size = 11 entries indexed from 0 to 10 and the following keys are to be mapped into the table: 10, 1000, 32, 45, 58, 126, 3, 29, 200, 400, 0 1. Find how many collisions occur when these keys are reduced to mod ... when these keys are first folded by adding their digits together and then reducing mod hash size (a) 2 (b) 3 (c) 4 (d) 5

asked Aug 12 in Programming by `JEET (159 points) | 6 views

+2 votes

1 answer

Igate test series
Consider the following program fragments d= 0; for (i=1;i<31;++i) for (j=1;j<31;++j) for (k=1;k<31;++k) if(((i+j+k) %3)==0) d =d+1; printf("% d",d); The number of addition performed by the above program fragment is (A)27000 (B)27000 *3 (c)9000+3*27000 (D)9930 + 27000 * 3

answered Aug 10 in Programming by Satbir (1k points) | 17 views

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Question on static variables . What will be the output ?

answered Aug 10 in Programming by Satbir (1k points) | 10 views

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Pointers : self Doubt
#include <stdio.h> void f(char**); int main() { char *argv[] = { "ab", "cd", "ef", "gh", "ij", "kl" }; f(argv); return 0; } void f(char **p) { char *t; t = (p += sizeof(int))[- ... of p when i use my intuition. in online compiler → printf( %u ,&argv) or printf( %d , argv) gives same addresses why it is so

answered Aug 9 in Programming by Satbir (1k points) | 13 views

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ternary operator
#include<stdio.h> int main() { int v1,v2,v3,m; v1=5; v2=5; v3=6; m=(v1>v2)?(v1>v3)?v1:v3:(v2>v3)?v2:v3; printf("%d",m); return 0; }

answered Aug 8 in Programming by sagar2405 (192 points) | 8 views

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ME test series Binary Trees doubt
Can someone plzz explain me what will be resultant tree . I am not getting it how this function find() duplicates each element in tree as given in the answer.

asked Aug 8 in Programming by Brij gopal Dixit (130 points) | 11 views

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What is the o/p printed by the program?
What is the o/p printed by the program? #include<stdio.h> int main() { char *s = "Hello" "world"; printf("%s",s); return 0; } (A) Compiler error (B) Hello (C) world (D) Helloworld

asked Aug 7 in Programming by val_pro20 (106 points) | 16 views

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1 answer

(i+ j+ k)%3 for loop

answered Aug 6 in Programming by Satbir (1k points) | 15 views