TECHNICAL QUESTIONS

Predict the output or error(s) for the following:

1. void main()
{
int const * p=5;
printf(“%d”,++(*p));
}

2. main()
{
    char s[]=”man”;
    int i;
    for(i=0;s[i];i++)
    printf(“\n%c%c%c%c”,s[i],*(s+i),*(i+s),i[s]);
}

3. main()
{
    float me = 1.1;
    double you = 1.1;
    if(me==you)
    printf(“I love you”);
    else
    printf(“I hate you”);
}

4. main()
{
    static int var = 5;
    printf(“%d”,var--);
if(var)
        main();
}

5. main()
{
    int c[] = {2,8,3,4,4,6,7,5};
    int j, *p=c, *q=c;
    for(j=0;j<5;j++)
    {
        printf(“%d”,*c);
        ++q;
    }
    for(j=0;j<5;j++)
    {
        printf(“%d”,*p)
        ++p;
    }

6. main()
{
    extern int I;
    i=20;
    printf(“%d”,i)
}

7. Find the output of the following program
class Sample
{
public:
    int *ptr
    Sample(int i)
    {
    ptr = new int(o);
    }
    ~Sample()
    {
    delete ptr;
    }
    void Print Val()
    {
    cout<<”The value is”<<*ptr
    }
};
void SomeFunc(Sample x)
{
cout<<”Say I am in someFunc”<<endl;
}
int main()
{
Sample s1 = 10;
SomeFunc(s1);
s1.PrintVal();
}

8. which is the parameter that is added to every non-static member function when it is called?

9. Find the output of the following program
class base
    {
    public:
    int bval;
    base(){bval=0;}
    };
class deri:public base
    {
public:
    int dval;
    deri(){dval=1;}
    };
void SomeFunc(base*arr,intsize)
{
for(int i=0;icount<bval;i++)
    cout<<ednl;
}
int main()
{
base Base Arr[5]
SomeFunc(BaseArr,5);
deri DeriArr[5];
SomeFunc(DeriArr,5);
}

10. Find the output of the following program
class base
    {
    public:
        void baseFunc(){Cout<<”from base”<<endl;}
    };
class deri:public base
    {
    public:
        void baseFunc(){Cout<<”from derived”<<endl;}
    };
void SomeFunc(base*baseObj)
{
    baseObj->baseFun()
}
int main()
{
base baseObject;
SomeFunc(&baseObject);
deri deriObject;
SomeFunc(&deriObject;
}

C Quick Test:

1. The C language terminator is
  a.semicolon 
  b.colon
  c.period
  d.exclamation mark

2. What is false about the following
  A compound statement is
  a.A set of simple statments
  b.Demarcated on either side by curly brackets
  c.Can be used in place of simple statement                                               
  d. A C function is not a compound statement.

3. What is true about the following
  C Functions
  a.Need not return any value
  b.Should always return an integer
  c.Should always return a float
  d.Should always return more than one value.

4. Main must be written as
  a.the first function in the program
  b.Second function in the program
  c.Last function in the program
  d.any where in the program

5. Which of the following about automatic variables within a function
  is correct ?
  a.its type must be declared before using the variable
  b.they are local
  c.they are not initialised to zero
  d.they are global.

6. Write one statement equalent to the following two statements
  x=sqr(a);
  return(x);
  Choose from one of the alternatives
  a.return(sqr(a));
  b.printf("sqr(a)");
  c.return(a*a*a);
  d.printf("%d",sqr(a));

7. Which of the following about the C comments is incorrect ?
  a.commentscan go over multiple lines
  b.comments can start any where in the line
  c.a line can contain comments with out any language statements
  d.comments can occur within comments 

8. What is the value of y in the following code?
   x=7;y=0;
   if(x=6)
    y=7;
   else
    y=1;
  a.7
  b.0
  c.1
  d.6

9. Read the function conv() given below
  conv(int t)
   {
    int u;
    u=5/9 * (t-32);
    return(u0;
   }
  What
  a.15
  b.0
  c.16.1
  d.29
 
10. Which of the following is not an infinite loop ?
   a.while(1){
     ....
     }
   b.for(;;){
     ...
     }
   c.x=0;
     do{
     /*x unaltered within theloop*/
     ...
     }while(x==0);
   d.# define TRUE 0
     ...
     while(TRUE){
     ....
     }

11. What does the following function print?
   func(int i)
   {
   if(i%2)return 0;
   else return 1;
   }
   main()
   {
   int =3;
   i=func(i);
   i=func(i);
   printf("%d",i);}
   a.3
   b.1
   c.0
   d.2

12. How does the C compiler interpret the following two statements
   p=p+x;
   q=q+y;
   a.p=p+x;
     q=q+y
   b.p=p+xq=q+y                     
   c.p=p+xq;
     q=q+y         
   d.p=p+x/q=q+y
  
13. Read the folllowing code
   # define MAX 100
   # define MIN 100
   ....
   ....
   if(x>MAX)
     x=1;
   else if(x<MIN)
     x=-1;
     x=50;
   if the initial value of x=200,what is the vlaue after executing this code?
   a.200
   b.1
   c.-1
   d.50

14. A memory of 20 bytes is allocated to a string declared as char *s
   then the following two statements are executed:
   s="Etrance"
   l=strlen(s);
   what is the value of l ?
   a.20
   b.8
   c.9
   d.21

15. Given the piece of code
   int a[50];
   int *pa;
   pa=a;
   to access the 6th element of the array which of the following is incorrect?
   a.*(a+5)
   b.a[5]
   c.pa[5]
   d.*(*pa + 5)

16. Consider the following structure:
   struct num nam{
                int no;
                char name[25];
                };
   struct num nam n1[]={{12,"Fred"},{15,"Martin"},{8,"Peter"},{11,Nicholas"}};
   .....
   .....
   printf("%d%d",n1[2],no,(*(n1 +  2),no) + 1);
   What does the above statement print?
   a.8,9
   b.9,9
   c.8,8
   d.8,unpredictable value

17.Identify the in correct expression
   a.a=b=3=4;
   b.a=b=c=d=0;
   float a=int b=3.5;
   d.int a;
     float b;
     a=b=3.5;

18. Regarding the scope of the varibles;identify the incorrect statement:
   a.automatic variables are automatically initialised to 0
   b.static variables are are automatically initialised to 0
   c.the address of a register variable is not accessiable
   d.static variables cannot be initialised with any expression

 19. The operator for exponencation is
   a.**
   b.^
   c.%
   d.not available

20. What is y value of the code if input x=10
   y=5;
   if (x==10)
   else if(x==9)
   elae y=8;
   a.9
   b.8
   c.6
   d.7

21. What does the following code do?
   fn(int n,int p,int r)
   {
   static int a=p;
    switch(n){
                case 4:a+=a*r;
                case 3:a+=a*r;
                case 2:a+=a*r;
                case 1:a+=a*r;
   }
   }
   a.computes simple interest for one year
   b.computes amount on compound interest for 1 to 4 years
   c.computes simple interest for four year    
   d.computes compound interst for 1 year

22. a=0;
   while(a<5)
   printf("%d\n",a++);
   how many times does the loop occurs?
   a.infinite
   b.5
   c.4
   d.6

23. How many times does the loop iterated ?
   for (i=0;i=10;i+=2)
    printf("Hi\n");
   a.10
   b.2
   c.5
   d.....

24. What is incorrect among teh following
   A recursive functiion
   a.calls itself
   b.is equivalent to a loop
   c.has a termination cond
   d.does not have a return value at all

25. Which of the following go out of the loopo if expn 2 becoming false
   a.while(expn 1){...if(expn 2)continue;}
   b.while(!expn 1){if(expn 2)continue;...}
   c.do{..if(expn 1)continue;..}while(expn 2);
   d.while(!expn 2){if(expn 1)continue;..}
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