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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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    Subcategories for C Interview Questions - The following are sub categories for which Interview Questions are available under this category. Please select the appropriate sub-category:

    Arrays in C Interview Questions (21)

    Branches & Loops in C Interview Questions (26)

    C Basics Interview Questions (129)

    Dynamic Memory Allocation in C Interview Questions (22)

    File Operations in C Interview Questions (19)

    Functions in C Interview Questions (59)

    Operators in C Interview Questions (23)

    Pointers in C Interview Questions (52)

    Strings in C Interview Questions (33)

    Structures in C Interview Questions (41)

    Variables in C Interview Questions (41)

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    Question
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    main() { int c = 5; printf("%d", main||c); }
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    main() { printf("%d, %d", sizeof('c'), sizeof(100)); }
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    Write a program to remove comment lines and blank lines from an error free c program.
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    Can we have nested header files in C?
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    main() { int i; clrscr(); for(i=0;i<5;i++) { printf("%dn", 1L << i); } }
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    How to find size of an datatype without using sizeof operator?
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    main() { signed int bit=512, mBit; { mBit = ~bit; bit = bit & ~bit ; printf("%d %d", bit, mBit); } }
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    How to reduce a final size of executable ?
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    main() { char c; int i = 456; clrscr(); c = i; printf("%d", c); }
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    void main () { int x = 10; printf ("x = %d, y = %d", x,--x++); }
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    What is a default TCP/IP socket assigned for SQL Server?
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    1.WRITE A 'C' PROGRAM TO READ THE AGE OF 100 PERSONS AND COUNT THE NUMBER OF PERSONS IN THE AGE GROUP 50 TO 60.USE FOR LOOP AND CONTINUE STATEMENTS.(10 MARKS) 2.WRITE A PROGRAM TO READ A POSITIVE INTEGER AND PRINT ITS BINARY EQUIVALENT.(10 MARKS) 3.GIVEN TWO ONE DIMENSIONAL ARRAYS A AND B WHICH ARE SORTED IN ASSCENDING ORDER.WRITE A PROGRAM TO MERGE THEM INTO A SINGLE SORTED ARRAY ,C THAT CONTAINS EVERY ITEM FROM ARRAYS A AND B,IN ASCENDING ORDER.(10 MARKS) 4.WRITE A FUNCTION IN C THAT WOULD TRAVERSE A LINEAR SINGLY LINKED LIST IN REVERSE AND WRITE OUT THE CONTENTS IN REVERSE ORDER.(10 MARKA) 5.WRITE A PROGRAM TO READ A SET OF INTEGERS AND TO SEPARATE ALL ODD AND EVEN NUMBERS .WRITE ALL EVEN NUMBERS IN ASCENDING ORDER.(10 MARKS) 6.WRITE A PROGRAM TO READ A REAL NUMBER X ANF FIND THE EVEN NUMBER NEAREST TO X.(10 MARKS) 7.WRITE A PROGRAM TO MULTIPLY TWO MATRICES OF ORDER M*N AND N*P RESPECTIVELY.(10 MARKS) 8.WRITE A PROGRAM IN'C' TO IMPLEMENT K-MAP SIMPLIFICATION TECHNIQUE.(10 MARKS)
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    If the following program (myprog) is run from the command line as myprog friday tuesday sunday, What would be the output? main(int argc, char *argv[]) { printf("%c",*++argv[1]); }
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    #define SQR(x) x * x main() { printf("%d", 225/SQR(15)); }
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    When should the register modifier be used? Does it really help?
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    main() { int i, j; scanf("%d %d"+scanf("%d %d", &i, &j)); printf("%d %d", i, j); }
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    When should a type cast be used?
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    In the following code, in which order the functions would be called? x = f1(23,14)*f2(12/4)+f3(); a) f1, f2, f3 b) f3, f2, f1 c) The order may vary from compiler to compiler d) None of the above
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    Write a program which accepts a filename as a command line argument and reverses the contents of the file( ie first character becomes the last character of the file and so on) Input: The program takes the file name whose content should be reversed. Output: The program reverses the contents of the file.
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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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