Which of the following is true about arrays in C?

Which of the following is true about arrays in C?

• A. They can only hold integers
• B. The size must be defined at the time of declaration
• C. They can dynamically change size during execution
• D. They are not mutable

Answer: (B)

The assertion regarding arrays in C that states the size must be defined at the time of declaration is indeed correct. In C, arrays require a fixed size to be specified at the moment they are declared. This means that whenever an array is created, the programmer must allocate enough space for the desired number of elements, and this size cannot change during the program's execution. For example, if you declare an array with a size of 10, it will have space to hold 10 elements of the specified type (like integers, characters, etc.). Attempting to access an index outside of this pre-defined range leads to undefined behavior. This fixed size is one of the defining characteristics of arrays in C, distinguishing them from data structures like linked lists or dynamic arrays that can grow or shrink as needed. Other options imply incorrect fundamentals of C arrays: they are not limited to holding only integers; they can contain any data type, including floats, characters, and user-defined types. Arrays in C also do not dynamically change size during execution; once defined, their size is constant. Lastly, arrays are mutable; this means that the values stored in the array can be changed, but the size remains fixed once declared.

The assertion regarding arrays in C that states the size must be defined at the time of declaration is indeed correct. In C, arrays require a fixed size to be specified at the moment they are declared. This means that whenever an array is created, the programmer must allocate enough space for the desired number of elements, and this size cannot change during the program's execution.

For example, if you declare an array with a size of 10, it will have space to hold 10 elements of the specified type (like integers, characters, etc.). Attempting to access an index outside of this pre-defined range leads to undefined behavior. This fixed size is one of the defining characteristics of arrays in C, distinguishing them from data structures like linked lists or dynamic arrays that can grow or shrink as needed.

Other options imply incorrect fundamentals of C arrays: they are not limited to holding only integers; they can contain any data type, including floats, characters, and user-defined types. Arrays in C also do not dynamically change size during execution; once defined, their size is constant. Lastly, arrays are mutable; this means that the values stored in the array can be changed, but the size remains fixed once declared.