C Interview Questions
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Create a registration form application by taking the details like username, address, phone number, email with password and confirm password (should be same as password).Ensure that the password is of 8 characters with only numbers and alphabets. Take such details for 3 users and display the details. While taking input password must appear as “****”.

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Question 1: You want to conduct a survey within your classroom, on the quality of canteen’s food. You ask each of your class fellows to rank the quality of food between 1 and 5 (1 representing excellent quality and 5 representing worst quality). During the survey, you make a list containing the roll# of student and the opinion given by that student. The list can be as follow Roll # Opinion 234 1 235 1 236 5 237 1 238 2 239 3 240 5 241 5 242 1 To get the results of the survey, you need to determine the frequency of each opinion value. The frequency of an opinion is determined by counting the number of students giving that opinion. For example, for the above list the frequency of opinion value 1 is 4 and frequency of opinion value 4 is 0. After getting the frequency of each opinion, you can easily judge about the quality of the food by seeing through the frequency of each opinion. You need to develop a program to calculate the results of this survey. The program inputs the opinion of 50 students and counts the frequency of each opinion. It then displays a report showing the frequency of each opinion. Sample output: Opinion Frequency Remarks 1 5 Excellent 2 10 Good 3 15 Normal 4 10 Bad 5 10 Really bad

1 3672

write a c program to calculate sum of digits till it reduces to a single digit using recursion

IBM,

2703

how to build a exercise findig min number of e heap with list imlemented?

1599

. A database table called PERSON contains the fields NAME, BASIC and HRA. Write a computer program to print a report which employee name and total salary for those employees whose total salary is more than 10,000. Total Salary = BASIC + HRA. At the end, the program should also print the total number of employees whose total salary is more than 10,000.

1 5566

Write a c program to print the even numbers followed by odd numbers in an array without using additional array

Tech Mahindra,

1 2926

Just came across this question, felt worth sharing, so here it is I want you to make a C/C++ program that for any positive integer n will print all the positive integers from 1 up to it and then back again! Let's say n=5 I want the program to print: 1 2 3 4 5 4 3 2 1. Too easy you say? Okay then... You can ONLY USE: 1 for loop 1 printf/cout statement 2 integers( i and n) and as many operations you want. NO if statements, NO ternary operators, NO tables, NO pointers, NO functions!

1 2813

write a program in c to read array check element is present or not?

1 3417

How to write a program to receive an integer & find its octal equivalent by using for loop?

Google,

1 3628

main() { int x, arr[8]={11,22,33,44,55,66,77,88}; x=(arr+2)[3]; printf(“%d”,x); }

Vector,

8 19133

struct tag{ auto int x; static int y; };main() { struct tag s; s.x=4; s.y=5; printf(“%d”,s.x); }

Vector,

2 12205

main() { struct test { char c; int i; char m; } t1; printf("%d %d\n", sizeof(t1), sizeof(t1.c)); }

Vector, Vector India,

1 8776

main() { unsigned int k = 987 , i = 0; char trans[10]; do { trans[i++] =(char) (k%16 > 9 ? k%16 - 10 + 'a' : '\0' ); } while(k /= 16); printf("%s\n", trans); }

Vector,

4 12202

main() { FILE *fs; char c[10]; fs = fopen(“source.txt”, ”r”); /* source.txt exists and contains “Vector Institute” */ fseek(fs,0,SEEK_END); fseek(fs,-3L,SEEK_CUR); fgets(c,5,fs); puts(c); }

Vector,

1 9167

main() { char as[] = "\\0\0"; int i = 0; do{ switch( as[i++]) {case '\\' : printf("A"); break; case 0 : printf("B"); break; default : printf("C"); break; }} while(i<3); }

Vector, Vector India,

4 9608


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Un-Answered Questions { C }

What is scope and lifetime of a variable in c?

562


write a proram to reverse the string using switch case?

2450


Can an array be an Ivalue?

652


Here is a neat trick for checking whether two strings are equal

551


Write a C program on Centralized OLTP, Decentralized OLTP using locking mechanism, Semaphore using locking mechanism, Shared memory, message queues, channel of communication, sockets and a simple program on Saving bank application program using OLTP in IPC?

2159






Why is python slower than c?

591


What is the use of clrscr?

579


What is the difference between exit() and _exit() function?

590


Why c is called free form language?

557


Which function in C can be used to append a string to another string?

633


How can I trap or ignore keyboard interrupts like control-c?

600


What are the valid places to have keyword “break”?

642


What the different types of arrays in c?

604


Can we initialize extern variable in c?

618


Where define directive used?

594