100 c interview questions answers

1 ans: (a) reason: you cannot declare structure as unsized array ans: (b) reason: The return st returns x value first as it is and then decrements its value Its post decrement ans: (e) reason: %p represents the pointer format specifier It prints the value in hexa decimal upto four digits ans: (b) ans: (b) reason: The values in the if st () is said to be in the stack So the last element in the stack is taken as check value(zero/non-zero) Here TRUE is -1 i.e success stateand x+y is printed /* Unsolved*/ ans: (c) reason: Static initializes all to ans: (b) reason: char pointer size = int pointer size = ans: (d) reason: 10 ans: (c) reason: printf returns the total no of characters it prints on the screen 11 ans: (c) unsolved*/ 12 reason: ;;; doesnot matter This indicates only an empty statement The o/p will be 3,1 13 ans: (b) 14 ans: (d) reason: The puts prints and places the cursor in the next line, whereas the printf prints and places the cursor in the same line 15 ans: (c) reason: You need to put '=' sign at show ie the correct st is end=(char*)(show=(char*)strcpy(start,"MISPIS,")); or else expression error 16 ans: (e) reason: The _fastcall keyword is reserved for programming under Windows and OS/2 17 ans: (a) reason: The strcmp returns if zone==target, If the ?: assigns fail st i.e This is false value for IF st and hence else part is executed 18 ans: (c) reason: t1 is an array So you need to specify the subscript value while you assign any element to it char *t1; t1="craft" is correct since *t1 is a pointer and it points to the starting addr of the craft 19 ans: (b) unsolved 20 ans: (b) 21 ans: (a) reason: Its a static array 22 ans: (b) unsolved 23 ans : (a) 24 ans: (d) 25 ans: (c) reason: c+ +100 is not valid as c=c+100 26 ans: (d) 27 ans: (a) 28 ans: (b) 29 ans: (a) 30 ans:(c) 31 ans: (d) 32 ans: (e) reason: incompatiable type conversions 33 ans: (c) reason: odd no AND with gives TRUE value always 34 ans: (b) reason: if we mention the string as two dimentional(for more than one dim) array with in printf statement,then we should give '&'symbol 35 ans: (b) reason: res=0+1/5; res=1/5+1/4; res=1/5+1/4+1/3; res=1/5+1/4+1/3+1/2+1/1; At last time res=1/5+1/4+1/3+1/2+1/1+1/0; ^ | zero divide occur 36 ans: (b) reason: '%c' mainly used for print one charactor We can't specify formate output within '%c' 37 ans: (b) reason: can not modify constant value It is a fixed value for entire program 38 ans: (b) reason: 'argc' holds number of arguments argc consist always value becase file name is one of the input therefore 1