Java C Basics MCQ 2nd, Java C Basics Question and Answers – Latest

In computing, real number often refers to non-complex floating-point numbers. It include both rational numbers, such as 42 and 3/4, and irrational numbers such as pi = 3.14159265…
When the accuracy of the floating point number is insufficient, we can use thedouble to define the number. The double is same as float but with longer precision and takes double space (8 bytes) than float.
To extend the precision further we can use long double which occupies 10 bytes of memory space.

C data types classification are
1. Primary data types
1. int
2. char
3. float
4. double
5. void
2. Secondary data types (or) User-defined data type
1. Array
2. Pointer
3. Structure
4. Union
5. Enum
So, clearly long int l = 2.35; is not User-defined data type.
(i.e.long int l = 2.35; is the answer.)

extern int fun(); declaration in C is to indicate the existence of a global function and it is defined externally to the current module or in another file.
int fun(); declaration in C is to indicate the existence of a function inside the current module or in the same file.

Variable names in C are made up of letters (upper and lower case) and digits. The underscore character (“_”) is also permitted. Names must not begin with a digit.

extern int x; – is an external variable declaration.
double pow(double, double); – is a function prototype declaration.
Therefore, 1 and 3 are declarations. 2 is definition.

Declaring is the way a programmer tells the compiler to expect a particular type, be it a variable, class/struct/union type, a function type (prototype) or a particular object instance. (ie. extern int i)

– During declaration we tell the datatype of the Variable.
– During definition the value is initialized.

_AX is register pseudo variable. It stores return type of function.

In the following expression:
f=3/2 both 3 and 2 are integer constant hence its result will also be an integer constant i.e. 1.

array[1][0][2] means 1*(2*3)+0*(3)+3=9th element of array starting from zero i.e. 8.

First see intermediate file:
try.c 1:
try.c 2: int main(){
try.c 3: float a=5.5;
try.c 4: if(a==5.5)
try.c 5: printf(“c”);printf(“c++”);
try.c 6: else
try.c 7: printf(“Not equal”);
try.c 8: }
try.c 9: return 0;
try.c 10:

If there are more than one statement in if block then it is necessary to write inside the { } otherwise it will show compiler error: misplaced else