C Interview Questions, Answers for Freshers and Experienced asked in various Company Job Interviews

C Interview Questions

Questions Answers Views Company eMail

#define f(g,h) g##h main O int i=0 int var=100 ; print f ("%d"f(var,10));} what would be the output?

Wipro,

1 5372

Write a C++ program without using any loop (if, for, while etc) to print prime numbers from 1 to 100 and 100 to 1 (Do not use 200 print statements!!!)

Cap Gemini, HCL,

2 7469

why do we use # in c-language?

1 4168

what is the difference between class and unio?

HCL, Wipro,

2363

int main() { int i=-1,j=-1;k=0,l=2,m; m=i++&&j++&&k++||l++; printf("%d%d%d%d%d",i,j,k,l,m); }

HCL,

3 8705

To print the pattern 1 2 3 4 5 10 17 18 19 6 15 24 25 20 7 14 23 22 21 8 13 12 11 10 9

HCL,

2637

for(;;) printf("C language") What is out put of above??

Practical Viva Questions,

2 4247

Heyyy All, Just a challenge . A C program with if Else if(){ /// insert sumthing print ("in if") // insert sumting } else { ///// insert sumthing print ("in else"); //// insert sumthing } can anyone modify it so that program prints. if and else both

3 4775

#include #include struct stu { int i; char j; }; union uni { int i; char j; }; void main() { int j,k; clrscr(); struct stu s; j=sizeof(s); printf("%d",j); union uni u; k=sizeof(u); printf("%d",k); getch(); } what is value of j and k.

Facebook,

2 6304

output for following code??? main() { int x=2,y,z; x*=3+2; printf("1.%d\n",x); x*=y=z=4; printf("2.%d %d %d\n",x,y,z); x=y==z; printf("3.%d\n",x); x==(y=z); printf("%d",x); }

Elysium,

2 4308

Write a c program for sum of first n terms of the series S = 1 - (1/3) + (1/5) -(1/7) + (1/9) ......

2 5819

Sir i need notes for structure,functions,pointers in c language can you help me please

TCS,

2416

How we can set and clear bit in a byte using macro function?

L&T, Samsung,

2 20601

How we can write a value to an address using macro..?

Tata Elxsi,

3438

#define FALSE -1 #define TRUE 1 #define NULL 0 main() { if(NULL) puts("NULL"); else if(FALSE) puts("TRUE"); else puts("FALSE"); }

1 9067

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Un-Answered Questions { C }

what is the function of pragma directive in c?

1120

what is the difference between north western polytechnique university and your applied colleges?? please give ur answers for this. :)

2404

What are pointers in C? Give an example where to illustrate their significance.

1227

If the size of int data type is two bytes, what is the range of signed int data type?

1021

In a header file whether functions are declared or defined?

1126

Do you know the purpose of 'register' keyword?

1019

What does the error 'Null Pointer Assignment' mean and what causes this error?

1222

write a program to display all prime numbers

1967

Write a program to maintain student’s record. Record should not be available to any unauthorized user. There are three (3) categories of users. Each user has its own type. It depends upon user’s type that which kind of operations user can perform. Their types and options are mentioned below: 1. Admin (Search Record [by Reg. No or Name], View All Records, Insert New Record, Modify Existing Record) 2. Super Admin (Search Record [by Reg. No or Name], View All Records, Insert New Record, Modify Existing Record, Delete Single Record) 3. Guest (Search Record [by Reg. No or Name], View All Records) When first time program runs, it asks to create accounts. Each user type has only 1 account (which means that there can be maximum 3 accounts). In account creation, following options are required: Login Name: <6-10 alphabets long, should be unique> Password: <6-10 alphabets long, should not display characters when user type> Confirm Password: Account Type: Login Name, Password and Account Type should be stored in a separate file in encrypted form. (Encryption means that actual information should be changed and Decryption means that Encrypted information is changed back to the actual information) If any of the above mentioned requirement(s) does not meet then point out mistake and ask user to specify information again. When Program is launched with already created accounts, it will ask for user name and password to authenticate. On successful authentication, give options according to the user’s type.

1983

what do the 'c' and 'v' in argc and argv stand for?

1168

What extern c means?

999

Why is it usually a bad idea to use gets()? Suggest a workaround.

1784

Is a house a mass structure?

1089

Where is volatile variable stored?

1089

Is null always defined as 0(zero)?

1107

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