Recent questions tagged programming - GATE CSE Doubts

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Self Doubt Algorithms
what is time complexity to insert a node based on key in a priority queue? O(nlogn) O(logn) O(n) (n2) i am unable to get the meaning of the question . is it a simple insertion in the priority queue?? . what is the meaning of “based on key”.Please explain this….

asked Oct 20 in Programming by manal jain (5 points) | 15 views

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C programming self doubt
int a=14; a=a++; Why is the final output of a is 14 and not 15? Since post operator is used so first the value 14 will be assigned to “a” and then “a” will get incremented to 15.So final value should be 15.But why it is coming output as 14?

asked Oct 19 in Programming by vishal burnwal (65 points) | 26 views

+1 vote

2 answers

Self Doubt Algorithms
I was having a doubt that should we consider = or I am finding different answers on the internet.

asked Oct 17 in Algorithms by satvik (11 points) | 41 views

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Self Doubt (Call-by-Need)
https://gateoverflow.in/960/gate2003-73 In this question it is said that Call-by-Need works the same way as Call-by-Name with the difference that the evaluation of the parameter reference is done the first time it is encountered in the called function. global int ... will be calculated and saved as 3 and rest of the time x = 3 will only be used producing the output 31 3?

asked Oct 12 in Programming by Mellophi (333 points) | 16 views

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Following C code why it is correct to use graph->array[i].head and graph->array[i]->head gives error?

asked Sep 25 in Programming by shashank023 (5 points) | 14 views

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1 answer

geeksforgeeks
#include <stdio.h> int main() { void demo(); void (*fun)(); fun = demo; (*fun)(); fun(); return 0; } void demo() { printf("GeeksQuiz "); } what will be its output and please explain as well!

asked Sep 22 in Programming by Setika Mehra (5 points) | 46 views

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p&ds(madeeasy subjectwise test)
In this last statement printf(“ \n %d %d “,s,t ) ; s value should be printed as 2 beacuse in the statement t= p + q+ s++ , s is post incremented so its value is incremented next statement but the sol gives value of s=2. What is the approach ?

asked Sep 22 in Programming by nitin21038 (9 points) | 27 views

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Geeksforgeeks
You are given a list of 5 integers and these integers are in the range from 1 to 6. There are no duplicates in list. One of the integers is missing in the list. Which of the following expression would give the missing number. ^ is bitwise XOR operator. ~ is bitwise NOT operator. Let elements of list can ... [4] ^ 1 ^ 2 ^ 3 ^ 4 ^ 5 D ~(list[0] ^ list[1] ^ list[2] ^ list[3] ^ list[4])

asked Sep 21 in Programming by Musa (5 points) | 10 views

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2 answers

madeeasy topicwise
A 3-ary tree in which every internal node has exactly 3 children. The number of leaf nodes in such a tree with 10 internal nodes will be _____

asked Sep 13 in Programming by nitin21038 (9 points) | 36 views

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topictest-madeeasy
no of digits in n integer part of logarithm of n base 2 fn always return 0 n/2 the sol is given as b) but I am getting a) as the answer

asked Sep 12 in Programming by nitin21038 (9 points) | 32 views

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Made easy theory, Self doubt in pointers
#include<stdio.h> int main() { char *p1="Graduate"; char *p2=p1; printf("%c",*++p2); printf("%d",sizeof(p2)); return 0; }

asked Sep 11 in Programming by sarthakdarji (9 points) | 52 views

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Understanding pointers in C (Yashavant Kanetkar)
Can anyone please provide the output of the below code with proper explanation:- #include <stdio.h> show(int(*q)[3][4],int ii,int jj,int kk){ int i,j,k; int *p; for(i=0;i<ii;i++){ for(j=0;j<jj;j++){ p=q[i][j]; printf("\nThis is %d\n",q[i][ ... 7,8, 9,3,2,1}, { 2,3,5,7, 4,3,9,2, 1,6,3,6} }; show(a, 2, 3,4 ) ; } Thanks in advance.

asked Sep 9 in Programming by Pratyush Priyam Kuan (1.1k points) | 41 views

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1 answer

Self doubt:Programming
What will be meaning of printf("%d",--*p); will return? I mean if ‘p’ pointing some address, will --*p decrement on the address or it will decrement the value of that address?

asked Sep 6 in Programming by srestha (1k points) | 55 views

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Programming :ME
#include<stdio.h> int main(){ int i=500; int *p=&i; foo(&p); printf("%d",*p); return 0; } void foo(int **p1){ int j=2; *p1=&j; printf("%d",**p1); } My doubt what happen when double pointer working as single pointer? *p1=&j in 11th line? Will it work like single pointer? And what will be the output?

asked Sep 6 in Programming by srestha (1k points) | 37 views

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Self doubt: Programming
#include <stdio.h> int main(void) { char a[20]="GATE 2021"; char *p1; p1=a+2; while((*p1++)&&(*p1!=NULL)){ (*p1)++; } printf("%s",a); return 0; } Will ASCII value of T increment? if not, why not??

asked Sep 5 in Programming by srestha (1k points) | 53 views

+2 votes

1 answer

Programming:ME
#include<stdio.h> main() { static char *s[]={"madeeasy","online","test”,"series"}; char **ptr[]={s+3,s+2,s+1,s},***p; p=ptr; ++p; printf("%s",*--*++p+3); } What will be printed as output?

asked Aug 31 in Programming by srestha (1k points) | 55 views

+1 vote

2 answers

Programming doubt:ME
main(){ void fun(); fun(); fun(); } void fun(){ static int i=1; auto int j=5; printf("%d",(i++)); printf("%d",(j++)); } What will be output for this code?

asked Aug 31 in Programming by srestha (1k points) | 35 views

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Programming :ACE test series
#include <stdio.h> int main(void) { while(1){ if(printf("%d",printf("%c"))) break; else continue; } return 0; } What will be printed here? Isnot garbage value also includes $1$ ?

asked Aug 29 in Programming by srestha (1k points) | 33 views

+1 vote

2 answers

Programming: ACE test
main() { char arr[]="\0"; if(printf("%s\n",arr)) printf("GOOD"); else printf("Nice"); } What will be output? According to online compiler https://ideone.com/ySN4a2 , ans is Nice But according to solution key, ... it prints, as it print a NULL character, it returns 1 and make if statement True. Thus Good printed Which one correct?

asked Aug 28 in Programming by srestha (1k points) | 37 views

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2 answers

Array-Programming
#include <stdio.h> int main() { char p; char buf[10] = {1, 2, 3, 4, 5, 6, 9, 8}; p = (buf + 1)[5]; printf("%dn", p); return 0; } what is the output of this code ?

asked Aug 16 in Programming by val_pro20 (2 points) | 68 views

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1 answer

Timothy williams, Principles of programming languages, enumeration in c

asked Jul 22 in Programming by Asim Siddiqui 4 (5 points) | 26 views

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0 answers

GATE undefined section
#include <stdio.h> void main() { int h = 8; int b = h++ + h++ + h++; printf("%d\n", h); } Will this code be considered as undefined as the ‘+’ has no sequence points unlike ‘,’ or we will get some result following the precedence table?

asked Jul 20 in Programming by abhi_sasuke (5 points) | 19 views

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1 answer

Programming in C
In C, can we declare the variable at the expression 1 of for loop? Why?

asked Jul 17 in Programming by Richa Agrawal (5 points) | 19 views

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GeeksforGeeks
As per the link https://www.geeksforgeeks.org/data-types-in-c/ if we assume long int takes 8 bytes(64 bits) then its range should be -2^63 to 2^63-1 , but that is not given in the link above. why is it so?

asked Jul 16 in Programming by Neelam_$ingh_222 (5 points) | 9 views

+1 vote

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Self Doubt:Programming
#include <stdio.h> char str1[100]; char *mystery(char str[]) { static int i = 0; if (*str) { mystery(str+1); str1[i] = *str; i++; } return str1; } int main() { char str[] = "ehT etaG kooB"; printf("%s", mystery(str)); return 0; } Plz execute the code and tell me, how these three line processing here? mystery(str+1); str1[i] = *str; i++;

asked Jul 14 in Programming by srestha (1k points) | 39 views

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Programming and DS
Can anyone give solution of this C Programming question

asked Jul 13 in Programming by Richa Agrawal (5 points) | 32 views

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1 answer

Made Easy Programmin And Data Structure Practise Set

asked Jul 13 in Programming by Prakhar Garg (5 points) | 17 views

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Madeeasy Programming and Data Structure Notes
In Dynamic Scoping , an extern variable will take value from Global Variable or Local variable , please tell me with respect to following question and also the printf results?

asked Jul 3 in Programming by Prakhar Garg (5 points) | 50 views

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Gate-2001:2 MARKS
int *g(void) { int *px; px = (int*) malloc (sizeof(int)); *px = 10; return px; }

asked Jun 9 in Programming by prajjwalsingh_11 (13 points) | 15 views

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Programming: Abstraction
Which of the following statement(s) is/are TRUE? (i). Abstraction principle includes use abstraction whenever possible to avoid duplication (ii). Encapsulation and abstraction differ as binding and hiding respectively (iii). Logical, Physical and View are level of abstraction

asked May 29 in Programming by luc_Bloodstone (19 points) | 13 views

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Programming : Encapsulation
Which among the following would destroy the encapsulation mechanism if it was allowed in programming? 1. Using access declaration for local variable of main() function 2. Using access declaration for private members of base class 3.Using access declaration for public members of base class 4.Using access declaration for global variables

asked May 29 in Programming by luc_Bloodstone (19 points) | 4 views

+1 vote

1 answer

tail recursion
#include <stdio.h> int function(int arg) { static int num = 6; if(num <= 1) return num; return (arg + function(arg -= num--)); } int main(void) { printf("return = %d\n", function(16)); return 0; } what is the o/p for this prog

asked May 24 in Programming by praveen modala (9 points) | 80 views

0 votes

2 answers

C programming Control Statement doubt
#include<stdio.h> int main() { char ch=’a’; switch(ch) { case ‘a’ && 1: printf(“Hello”); case ’b’ && 1: printf(“world”); break; default: printf(“GATE”); } }

asked May 13 in Programming by VIKAS PARA (5 points) | 27 views

0 votes

0 answers

C programming airport question
Write a program You need to simulate the working of an airport. Let us consider a small but busy airport with two runways, one usually used for landings and one usually used for takeoffs. Planes arrive ready to land or ready to take off ... be stopped and both runways used to clear the backlog of landing planes. The simulation should run through many units of time

asked May 8 in Programming by Tanki (5 points) | 44 views

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0 answers

GATE CS 2014 exam, Geeks for Geeks
Consider the following program in C language: #include <stdio.h> main() { int i; int *pi = &i; scanf("%d", pi); printf("%d\n", i+5); } Which one of the following statements is TRUE? (A) Compilation fails. ... is 5 more than the address of variable i. (D) On execution, the value printed is 5 more than the integer value entered.

asked May 6 in Programming by sristicse (5 points) | 18 views

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0 answers

GATE2017-1-36 Video Solution
Consider the C functions foo and bar given below: int foo(int val) { int x=0; while(val > 0) { x = x + foo(val--); } return val; } int bar(int val) { int x = 0; while(val > 0) { x= ... result in: Return of $6$ and $6$ respectively. Infinite loop and abnormal termination respectively. Abnormal termination and infinite loop respectively. Both terminating abnormally.

asked Apr 18 in Programming by admin (193 points) | 9 views

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GATE2017-1-53 Video Solution
Consider the following C program. #include<stdio.h> #include<string.h> void printlength(char *s, char *t) { unsigned int c=0; int len = ((strlen(s) - strlen(t)) > c) ? strlen(s) : strlen(t); printf("%d\n", len); } ... defined in $string.h$ as returning a value of type $size\_t$, which is an unsigned int. The output of the program is __________ .

asked Apr 18 in Programming by admin (193 points) | 6 views

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GATE2015-1-35 Video Solution
What is the output of the following C code? Assume that the address of $x$ is $2000$ (in decimal) and an integer requires four bytes of memory. int main () { unsigned int x [4] [3] = {{1, 2, 3}, {4, 5, 6}, {7, 8, 9}, {10, 11, 12}}; printf ("%u, %u, %u", x + 3, *(x + 3), *(x + 2) + 3); } $2036, 2036, 2036$ $2012, 4, 2204$ $2036, 10, 10$ $2012, 4, 6$

asked Apr 18 in Programming by admin (193 points) | 4 views

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GATE2017-1-13 Video Solution
Consider the following C code: #include<stdio.h> int *assignval (int *x, int val) { *x = val; return x; } void main () { int *x = malloc(sizeof(int)); if (NULL == x) return; x = assignval (x,0); if (x) ... $x == NULL$ and not as shown. compiles successfully but execution may result in dangling pointer. compiles successfully but execution may result in memory leak.

asked Apr 18 in Programming by admin (193 points) | 5 views

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GATE2017-1-55 Video Solution
The output of executing the following C program is _______________ . #include<stdio.h> int total(int v) { static int count = 0; while(v) { count += v&1; v >>= 1; } return count; } void main() { static int x=0; int i=5; for(; i>0; i--) { x = x + total(i); } printf("%d\n", x); }

asked Apr 18 in Programming by admin (193 points) | 8 views

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