Past Papers 12th Class Computer Science Ch 9

Past Papers 12th Class Computer Science Ch 9 Questions

• Define Constant.
• Write any two rules for Naming variable.
• Define Expression.
• Differentiate between =´a` and =a.
• what is meant by Associativity of Operators?
• Difference between declaring and defining a variable.
• What is the value of Y after the following code executes:

               float Y=3.4+SQRT(25.0)

• Give some example of valid variable names.
• Describe variable declaration.
• Define character constant.
• Trace the error.

               Int a=6

               ++a;

               printf(´´%f`, a)

• Define comments in C.
• Distinguish between a constant and a variable.
• What is compound assignment operator?
• Define increment decrement operators.
• What is the use of AND operator?
• Trace the Output

            int number=6;
            int x=0;
            x=--number;
            printf(´´%d``,x);

• what happen when arithmetic under flow occurs?
• Define variable.
• Find the error in the following code:

           #include<std10.h>
           {
            Intx,y,z
            z=x+y+z
           }

• Identify the error in the following lines.

           Integer A=2+3;
           Float B=5;
           int C=A+B;

• Describe the identifier.
• Trace the error in the following code:

           int x=10 y=15;
           x=x++
           y=++y;
           printf(´´%d %d``, x,y);

• predict the output of the following code:

             int number =6;
             ++number;
             printf(´´%d\n``,number);

• differentiate beween string constant and character constant.
• List any four types of integer data in C-Language.
• Differentiate between implicit and explicit type casting.
• Predict the output of the following

          void main( )
         {
          int x=1;
          x++;
          printf(´´%d```,x);
          }

• Define keywords.
• What do you mean by assignment operator?
• List two types of identifier in C.
• how are characters stored?
• Why is it important to assign a data type?
• What is statement terminator?
• Write the use of turbo c++?
• Naming data type use to store real data type?
• Write a shortcut key to run.
• Write legal character for identifier?
• Why does integer overflow occurs?
• Find the error.

          Void main ()
          {
           Int c=7
           printf(´´%d``, c:
          }

• write the use of operators.
• What is the use of assignment statement?
• Differentiate between unary and binary operators.
• List four keywords in C language.
• Write about data types in C.
• how does cancellation error occur?
• Describe variable initializtion.
• What is garbage value.
• Find errors of C code:

           int a=10, b=40
           printf(´´sum;´´a+b)