Correct: int a;
Variable declarations in C follow the format: type name; e.g., int a;
Correct: Garbage value
Local variables are not initialized automatically; they contain garbage values.
Correct: _var
Variable names can't start with a digit. '_var' is valid.
Correct: Makes variable unchangeable
The 'const' keyword makes a variable read-only after initialization.
Correct: char
'char' is used to store a single character in C.
Correct: =
The '=' operator is used for assignment in C.
Correct: 4
On most 32-bit systems, an int occupies 4 bytes.
Correct: float
'float' is a floating-point type used for decimals.
Correct: Error
In C, using undeclared variables causes a compilation error.
Correct: extern
'extern' can be used to reference global variables declared elsewhere.