C#.NET — Identify the value types among the following: Integer, Array, Single, String, Long.

Difficulty: Easy

1, 2, 5
1, 3, 5
2, 4
3, 5
None of these

Correct Answer: 1, 3, 5

Explanation:

Introduction / Context:
C# divides types into value types (stack-allocated semantics) and reference types (heap-allocated semantics). Recognizing which common types are value or reference is foundational.

Given Data / Assumptions:

(1) Integer (int)
(2) Array
(3) Single (float)
(4) String
(5) Long (long)

Concept / Approach:
All numeric primitives (except decimal’s special handling) are value types: int, float (Single), long, etc. Arrays and string are reference types. Therefore, among the listed items, Integer, Single, and Long are value types.

Step-by-Step Solution:

Check Integer (int): value type → include. Check Array: reference type → exclude. Check Single (float): value type → include. Check String: reference type → exclude. Check Long (long): value type → include.

Verification / Alternative check:
System.ValueType is the base for int, float, long, etc., while arrays derive from System.Array and string is System.String, both reference types.

Why Other Options Are Wrong:
They either include Array/String or omit one of the numeric value types.

Common Pitfalls:
Assuming arrays are value types because their elements can be value types; the array itself is always a reference type.

C#.NET — Identify the value types among the following: Integer, Array, Single, String, Long.

More Questions from Datatypes

Discussion & Comments