Recent questions tagged 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 11 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 13 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 13 hours ago in Programming by srestha (247 points) | 7 views

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Sorting algorithm
An unsorted array of n elements is given to you and you have to print largest 10% of them. This can be done on time O(1) O(n) O(logn) O(nlogn)

asked 2 days ago in Algorithms by sagar2405 (192 points) | 20 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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Made easy Algorithm
Which of the following procedure is suitable for finding the longest path from given vertex to any other vertex in a directed acyclic graph(weighted) with few negative weight edge. Divide and conquer Greedy algorithm Dynamic programming All of the above

asked 3 days ago in Algorithms by sagar2405 (192 points) | 9 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

asked 3 days ago in Programming by altamash (139 points) | 13 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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Made easy test series - Algorithm
How to do find 0/1 knapsack in minimum time?

asked 4 days ago in Algorithms by sagar2405 (192 points) | 13 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??

asked 4 days ago in Programming by srestha (247 points) | 45 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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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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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??

asked 6 days ago in Programming by srestha (247 points) | 21 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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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??

asked Aug 16 in Programming by srestha (247 points) | 22 views

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Self-doubt-Priority queue
Can we implement linked-list with priority queue??

asked Aug 15 in DS by srestha (247 points) | 18 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??

asked Aug 15 in Programming by srestha (247 points) | 43 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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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

asked Aug 12 in Programming by Maguluri Bhaskar (105 points) | 12 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

asked Aug 9 in Programming by Aks9639 (105 points) | 13 views

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please explain whileloop (self doubts )
. Consider the following program int main ( ) { char *str = “Gate2020” printf (“%d”, aaaa (str)); return 0; } int aaaa (char *P1) { char *P2 = P1; while (*++P1); return (P1 – P2); } The output of the above program will be __________. .

asked Aug 5 in Programming by altamash (139 points) | 8 views

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dennis ritchie
#include<stdio.h> #define in 1 #define out 0 int main() { int c,n=0,nl,nw,nc,state; nl=nw=nc=0; state=out; while((c=getchar())!=’EOF’) ++nc; if(c=='\n') ++nl; if(c==' '||c=='\n'||c=='\t') state=out; else if(state==out) { state=in; nw+=1; } printf("nc=%d\nnw=%d\nnl=%d\n",nc,nw,nl); return 0; }

asked Jul 31 in Programming by Parth nathani (169 points) | 15 views

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3 answers

Ravindrababu ravula programming and data structure

asked Jul 30 in Programming by shivam001 (105 points) | 34 views

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1 answer

Tell Output C-PL IISC Question
What is the output of the following program? #include<stdio.h> int main() { int a = 5; int b = ++a * a++; printf("%d ",b); return 0; } (a) 25 (b) 30 (c) 36 (d) Undefined Behavior

asked Jul 21 in Programming by iarnav (159 points) | 45 views

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1 answer

Programming Self Doubt
What would the following program return? #include<stdio.h> int p(int n){ static int a=1; if(n<=1) return a; else{ a=a*p(n-1); } } void main() { printf("%d",p(6)); } Here notice that the else statement in p(int n) does not have return.

asked Jul 16 in Programming by Sambhrant Maurya (281 points) | 19 views

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1 answer

programming in pointer as an array
#include<stdio.h> #include<conio.h> int main() { int a[]={1,2,3,4,5,6,7}; int b[]={'a','x','h','o','k'}; printf("%d\t%d",(&a[3]-&a[0]),(&b[3]-&b[0])); return 0; }

asked Jul 16 in Programming by Parth nathani (169 points) | 13 views

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C programming book
Please provide the step by step explanation for this question as few things are more confusing here. #include <stdio.h> #define PRINT(format, x) printf(#x " = %" #format "\n", x) int integer = 5; char character = '5'; char *string = "5"; main ... 1 ux/2 = 2147483647 x/2 = 1 ux >> 1 = 17777777777 x >> 1 = 1 ux >> 1 = 2147483647

asked Jul 15 in Programming by `JEET (159 points) | 11 views

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GateForum Test Series: Programming
The output of following code is: #include<stdio.h> char* foo(char *s) { char *s1 = s; while(*s1!=0) { (*s1)++; s1++; } return s; } int main() { char *str = "GATEFORUM"; printf("%s", foo(str)); return 0 ... in function foo() s1 is pointing to a string constant ( GATEFORUM ) which cannot be modified. So (*s1)++ should throw an error right?

asked Jul 14 in Programming by Sambhrant Maurya (281 points) | 11 views

–2 votes

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In Reema Thareja DS book Chapter 1 Programming Exercise 10, I saw a question it says...

asked Jul 11 in Programming by meakshaymishra (149 points) | 12 views

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Conditions in for loop
#include <stdio.h> void main(){ int i=0; for(i<=5&&i>=-1;++i;i>0){ printf("%d\t", i); } } What is the output?

asked Jul 9 in Programming by Sathuri Bharath (126 points) | 20 views

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1 answer

Right Shift of -1
#include <stdio.h> void main() { printf("%x and int is %d\n", -1>>1, -1>>1 ); } what is the output?

asked Jul 9 in Programming by Sathuri Bharath (126 points) | 12 views

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write program remove specified a character from a non-empty string using index of a character(WITHOUT REMOVE FUNCTION)

asked Jul 5 in Programming by Ravi888888 (102 points) | 8 views

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1 answer

Self Doubt. Time complexity of iterative programs
$i = 12$ while( i < n ) { $i = i ^ 5$ $i = i /3$ $i = i *7$ } What is the time complexity?

asked Jun 28 in Algorithms by AliH (107 points) | 14 views

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1 answer

Programming in C[Self Doubt]
#include <stdio.h> int main(void) { char a[6]="world";int p=0; int i,j; for(i=0,j=5;i<j;a[i++]=a[j--]){ printf("%c",a[i]); printf("%c",a[i++]); } printf("%s",a); } Output is “wwrrw” Please explain how?

asked Jun 25 in Programming by Debdeep1998 (110 points) | 35 views

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C - PL - GATE 2005 IT Question Self Doubt.
Link to original question - https://gateoverflow.in/3814/gate2005-it-53 int anagram (char *a, char *b) { int count [128], j; for (j = 0; j < 128; j++) count[j] = 0; j = 0; while (a[j] && b[j]) { A; B; } for (j = ... CBA then while (a[0] && b[0]); while (A&&B); // how do we solve this? How the condition be checked in while loop?

asked Jun 25 in Programming by iarnav (159 points) | 16 views

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1 answer

Madeeasy workbook
Consider a declaration Int a=5,*b=&a; printf("%d",a*b); The output is A) 25 B) garbage C)5 * address of b D) error message

asked Jun 24 in Programming by Prakhar Garg (102 points) | 9 views

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1 answer

for loop more than 1 members in initialization,condition and increment/decrement

asked Jun 23 in Programming by shiva0 (124 points) | 6 views

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1 answer

character array and string
what is the difference between char str1[25]; //this is taking characters and char str2[25][25]; //this is taking strings being confusing that why the str1 is taking characters and str2 is taking strings

asked Jun 23 in Programming by shiva0 (124 points) | 6 views