C# - Structures Questions and Answers
C# Structures programming questions and answers help learners understand value types and memory management in .NET. Structures in C# are lightweight data types that store related data efficiently without the overhead of classes. Companies like Infosys, HCL, and TCS often include structure-related questions in interviews to test programming fundamentals. Practicing programming interview questions with answers based on structures allows candidates to learn syntax, constructors, field declarations, and performance differences compared to classes. Mastering structures improves understanding of memory optimization and efficient coding—vital skills for software developers and interview aspirants.
Study structures and unions in C programming. Pair this with data types and dynamic memory allocation
C# - Structures
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39 questions
11. Which of the following statements is correct?
- A struct never declares a default constructor.
- All value types in C# inherently derive from ValueType, which inherits from Objec
- All value types in C# inherently derive from ValueType, which inherits from Object.
- A struct never declares a default destructor.
12. Which of the following statements are correct about the structure declaration given below? struct Book { private String name; protected int totalpages; public Single price; public void Showdata() { Console.WriteLine(name + " " + totalpages + " " + price); } Book() { name = " "; totalpages = 0; price = 0.0f; } } Book b = new Book(); We cannot declare the access modifier of totalpages as protected. We cannot declare the access modifier of name as private. We cannot define a zero-argument constructor inside a structure. We cannot declare the access modifier of price as public. We can define a Showdata() method inside a structure.
- 1, 2
- 1, 3, 5
- 2, 4
- 3, 4, 5
13. Which of the following are true about classes and struct? A class is a reference type, whereas a struct is a value type. Objects are created using new, whereas structure variables can be created either using new or without using new. A structure variable will always be created slower than an object. A structure variable will die when it goes out of scope. An object will die when it goes out of scope.
- 1, 2, 4
- 3, 5
- 2, 4
- 3, 4, 5
14. Which of the following statements are correct about Structures used in C#.NET? A Structure can be declared within a procedure. Structs can implement an interface but they cannot inherit from another struct. struct members cannot be declared as protected. A Structure can be empty. It is an error to initialize an instance field in a struct.
- 1, 2, 4
- 2, 3, 5
- 2, 4
- 1, 3
15. What is a structure in C#
- A reference type used to store methods only
- Explanation: A structure is a value type that groups related variables under one name.
- A class with only static members
- A collection type like ArrayList
16. Which keyword is used to define a structure in C#
- class
- Explanation: The struct keyword is used to declare a structure in C#.
- record
- object
17. Which of the following best describes a C# structure
- Stored on heap memory
- Always immutable
- Explanation: Structures are value types and are typically stored on the stack.
- Cannot contain methods
18. Which type of inheritance is supported by C# structures
- Multiple inheritance
- Single inheritance
- Hierarchical inheritance
- Explanation: Structures cannot inherit from other structs or classes.
19. Which of the following members can a structure contain
- Fields only
- Methods only
- Explanation: Structures can contain fields, methods, properties, and constructors.
- Events only
20. What is the default value of an integer field in a structure
- null
- undefined
- Explanation: All value type fields are automatically initialized to default values.
- garbage value