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CBSE Class 12 Pre Board 2019 : Computer Science (St Xavier's Sr. Sec. School, Delhi)

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ST. XAVIER S SR. SEC. SCHOOL, DELHI-110054 Std.12 03-01-2019Pre Board Exam in Computer Science 1. a) Time: 3 hrs. M. Marks: 70 Rewrite the following program after removing syntax error(s) if any in the following program segment. [2] void main( ) int A[10]; A=[39,-45]; for( p = 0; p<=6; p++) { if(A[p]%2=0) int S = S+A[p];} cout<<S;} b) Write the output of the following program segment (assume all necessary header files are included) [2] void func(char s[]) { for (int i=0;s[i]!='\0';i++) { if(((i%2)!=0) &&(s[i]!=s[i+1])) { s[i]='@'; } else if (s[i]==s[i+1]) { s[i+1]='!'; i++; } }} void main() { char s[]="ACCESS"; cout<< Original String <<s; func(s); cout<<"Changed String"<<s; } c) Find out the output of the following program segment [3] void main( ) { intAr[ ] = { 6 , 3 , 8 , 10 , 4 , 6 , 7} ; int *Ptr = Ar , I ; cout<<++*Ptr<< '@' ; I = Ar[3] - Ar[2] ; cout<<++*(Ptr+I)<<'@'<<"\n" ; cout<<++I + *Ptr++ << '@' ; cout<<*Ptr++ <<'@'<< '\n' ; for( ; I >=0 ; I -=2) cout<<Ar[I] << '@' ; } d) Observe the following program and find out, which output(s) out of (i) to (iv) willbe expected from the program? What will be the minimum and the maximum value assigned to the variable Alter? [2] Note: Assume all required header files are already being included in the program. void main( ) { randomize(); intAB[]={10,7}, NO; int A=random(2) + 10 ; for (int C=0;C<2;C++) { NO=random(2) ; cout<<AB[N] +A<< # ; } } (i) 21#20# (ii) 20#18# (iii) 20#17# (iv) 21#17# e) Observe the following program very carefully and write the name of those header file(s), which are essentially needed to compile and execute the following program successfully: [1] void main() { char text[20], newText[20]; gets(text); strcpy(newText,text); for(inti=0;i<strlen(text);i++) if(text[i] = = A )

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