Which of the following statements about arrays in C# is TRUE?

Question

BlackTom AI · Accepted Answer

Let's evaluate each statement about arrays in C# one by one to see what is true and what is false.

Option a: 'Arrays are fixed in size once declared.' This is true. In C#, an array has a fixed length once it is created; the number of elements cannot be changed, though you can reassign the reference to a new array with a different size. This reflects the core characteristic of arrays as a contiguous, fixed-size collection.

Option b: 'Arrays can store values of different data types.' This is false for a single array instance. In C#, an array is strongly typed, meaning all elements must be of the same declared element type (e.g., int[], string[], double[]). If you need mixed types, you would need an array of object (object[]) or use a different collection like List<object>, which is generally avoided for strong typing and performance reasons.

Option c: 'Arrays cannot be passed to methods.' This is false. Arrays are reference types and can be passed to methods just like any other reference type. The method can read or modify the elements, and changes inside the method will affect the original array if it mutates its contents.

Option d: 'Arrays can only be declared inside methods.' This is false. Arrays can be declared at class, struct, or method scope, and can be fields (member variables) of a class or struct, as well as local variables inside methods. They are not restricted to declaration inside methods.

In summary, only option a correctly states a true property of arrays in C#, while options b, c, and d describe incorrect or incomplete aspects of how arrays work in the language.

Which of the following statements about arrays in C# is TRUE?单项选择题

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