GATE Computer Science Engineering(CSE) 2027 Test: Programming in C++, C

Enum variable type is a special flavor of a long type variable with an enum, we can specify a number of valid values for that variable and descripted constant names for the values of the enum. These values are used instead of constant. Enum variable can be declared. The advantage of enum is it provide logical clarity of a program.

The macro call will be expanded as
sqrt (a + 2 * a + 2 + b + 3 * b + 3)
i.e. sqrt (3 * a + 4 * b + 5).

Hypotenuse of right angles triangle (a+1), (b+1) will be
h = (a + 1)² + (b + 1)²
= a² + 2a + 1 + b² + 2b + 1
= a² + b² + 2a + 2b + 2
which is not generated by any option.

Pointer to an integer and pointer to a character are equivalent when the context of size of operator is used.

Array and pointer are same in implementation. By using pointer we can access any of the index array. Array is a constant pointer and pointer is a one dimensional dynamic array.

With macro no recursion is possible, pointers cannot be used with macro identifiers and no type checking will be done and it increase the code size. So, function will be advisable to used instead of macro.

Macro will reduce the execution time and can be used when there is a loop with a function call inside.

Addition will performed: 
d = d + 1
= 9000 times
++z = 30 times
++j = 30 x 30 times
++K = 30 x 30 x 30 times
i + j + k = (30 x 30 x 30) x 2 
So,
Total = 9000 + 900 + 30 + (27000 + 2 x 27000)
= 9930 + (3 x 27000)

Like array name, name of a function is a pointer to it. The given program results in starting address of function main (), which is pointer to it.

Since address to some of the variable assigned at run time which is assigned by operating system. Two variable can have same address at different instance of time.