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C Interview Questions & Answers

Below we have listed all the C Interview Questions and answers. Feel free to comment on any C Interview Questions or answer by the comment feature available on the page.

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C Interview Questions & Answers

C is a high-level and general purpose programming language that is ideal for developing firmware or portable applications. Originally intended for writing system software, C was developed at Bell Labs by Dennis Ritchie for the Unix Operating System (OS) in the early 1970s. With the increasing popularity of object-oriented programming, C is being rapidly replaced as "the" programming language by C++, a superset of the C language that uses an entirely different set of programming concepts, and by Java, a language similar to but simpler than C++, that was designed for use in distributed networks.

Subcategories for C Interview Questions & Answers :-

Following are sub categories for which Interview Questions & Answers are available under C Interview Questions & Answers. Please select the appropriate sub-category:-

Arrays in C Interview Questions & Answers (18)

Branches & Loops in C Interview Questions & Answers (22)

C Basics Interview Questions & Answers (92)

Dynamic Memory Allocation in C Interview Questions & Answers (21)

File Operations in C Interview Questions & Answers (16)

Functions in C Interview Questions & Answers (59)

Operators in C Interview Questions & Answers (22)

Pointers in C Interview Questions & Answers (43)

Strings in C Interview Questions & Answers (32)

Structures in C Interview Questions & Answers (39)

Variables in C Interview Questions & Answers (38)

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void main() { float a= 0.7; if (a < 0.7) printf("c"); else printf("c++"); } Output of the above program is c. Why? Whereas the same program with 0.8 instead of 0.7 gives c++ as the output? Why explain?
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What is page thrashing?
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main() { extern int i; i=20; printf("%d",i); }
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main() { if (!(1&&0)) { printf("OK I am done."); } else { printf("OK I am gone."); } }
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#define SQR(x) x * x main() { printf("%d", 225/SQR(15)); }
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What are enumerations?
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How to find GCD of four numbers?
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To which numbering system can the binary number 1101100100111100 be easily converted to?
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Write a program to remove comment lines and blank lines from an error free c program.
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When should the register modifier be used? Does it really help?
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What is a default TCP/IP socket assigned for SQL Server?
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When should a type cast be used?
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What is difference between the test effort and the test procedure?
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If the following program (myprog) is run from the command line as myprog monday tuesday wednesday thursday What would be the output? main(int argc, char *argv[]) { while(--argc >0) printf("%s",*++argv); }
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main() { int i=3; switch(i) { default:printf("zero"); case 1: printf("one"); break; case 2:printf("two"); break; case 3: printf("three"); break; } }
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main() { int x=5; clrscr(); for(;x==0;x--) { printf("x=%dn?", x--); } }
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What will be the output of the following program in UNIX OS with CC compiler and TC compiler? int main() { int i=5; printf(" %d",++i + ++i + ++i + ++i + ++i ); } If any difference then Why it is difference?
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The program that outputs the given binary or image file
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main() { char *p; printf("%d %d ",sizeof(*p),sizeof(p)); }
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#include<conio.h> main() { int x,y=2,z,a; if(x=y%2) z=2; a=2; printf("%d %d ",z,x); }
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