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20091_final - Dept of Computer Eng Student Name Surname...

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Dept. of Computer Eng. Fall 2009 CEng 230 Final Examination Jan. 12, 2010 75 Minutes EXAM GROUP A Student Name & Surname Student ID Use the below program to answer next 2 questions. int days_in_feb(int y) { if(y % 100 == 0) return 28; if(y % 4 == 0) return 29; return 28; } int dyear ( int day , int month, int year ){ int day_of_year ; day_of_year = day ; for( ; month > 0; month--) switch ( month ) { case 11: case 9 : case 6: case 4 : day_of_year += 30; break; case 10: case 8 : case 7: case 5 : case 3: case 1 : day_of_year += 31; break; case 2: day_of_year += days_in_feb( year ); } return day_of_year ; } 1. What is the value returned by dyear(1,3,2009)? a) 1 b) 32 c) 60 d) 91 e) 30 2. There is an error in this program. Which of the below corrections would fix this error? a) switch (month) switch(month -1) b) for(; (month-1)>0 ; month--) for(; (month-1) > 0 ;) c) return 28 return ( (month == 2)? 28:29) d) switch (month) switch(month +1) e) There is no error. 3. What is the value of “y” after below code segment is executed? int x1 = 7, x2 = 10, x3 = 8.1, y ; y = x3>x1 – x2<=10 ; 4. What is the output of the below code? #include <stdio.h> int fun (int ix){ ix = ix * 2 ; printf ("%d " , ix); return ix ; } int main (void) { int x = 3 ; printf ("%d ", x); printf ("%d\n", fun(x)); return 0 ; } 5. What is the output of the below program with input “3” #include<stdio.h> int fonksiyon ( int gln ) { if( gln <= 1 ) return 1; else return (gln*fonksiyon(gln– 1)); } int main ( void ) { int k,N,f; puts(“Enter an integer: “); scanf ( “ %d “ , &N ); f= fonksiyon(N); printf(“Result is=%d\n“, f ); return 0 ; } 6. What is the mistake in the below switch statement? double a= 1.25; switch(a){ case 1.1: case 1.2: x= x*x; y= x; break; case 1.3: y= x*x; case 2.1: case 3.3: y= sqrt(x); break; case 3.5: printf(“Error “); break; default: y= x+1; a) “case 1.3” has no break b) “default” doesn’t have “printf” c) “a = 1.25” is not matched. d) “switch” works only with integers e) “case 3.5” doesn’t need “break”
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7. How can you code the below condition in C? “x and y are both greater than z” a) a) x > z && y > z b) b) x && y > z c) c) (x && y) > z d) d) (x | | z ) > z e) e) x > z | | y > z 8. If a=1 and b=20 what is the output of the below code segment? if(a=10){ if(b == 20) printf(“*** ”); } else printf(“*****”) ; 9. What is the effect of the following code segment? int i; for (i=1;i <21;i++) if (i%3 == 0) printf(“%4d”,i);
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  • Spring '09
  • Assoc.Prof.Dr.CEMHÜSEYİNBOZŞAHİN
  • Following, Christopher Nolan, ASCII, Void type, Division by zero, Defined and undefined

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