C# Attributes Questions with Answers | Page 4

C# Attributes programming questions and answers help developers understand metadata and reflection in .NET applications. Attributes provide declarative information about program elements, influencing how the runtime behaves. These concepts are often asked in interviews by companies like HCL, Infosys, and TCS to assess deep understanding of advanced C# features. Practicing programming interview questions with answers on attributes helps candidates learn how to create custom attributes, retrieve metadata using reflection, and apply predefined ones like [Obsolete] or [Serializable]. Strengthening this topic ensures you can confidently tackle conceptual and coding questions in software development interviews.

Focus on attributes and modifiers in C programming language. Also try C functions and subroutines and C datatypes

Showing 10 of 38 questions

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Q31

Which attribute allows conditional compilation?

A Explanation: Conditional includes method calls based on compilation symbols.
B IfDefined
C DebugOnly
D CompileCheck

Answer: Option A

Explanation: Conditional includes method calls based on compilation symbols.

Q32

Which attribute is used to define serialization behavior?

A Explanation: Serializable marks a class as eligible for serialization.
B Data
C Persist
D Store

Answer: Option A

Explanation: Serializable marks a class as eligible for serialization.

Q33

Which attribute prevents a class from being serialized?

A Explanation: NonSerialized prevents a field from being serialized.
B NoSerialize
C IgnoreData
D SkipSerialize

Answer: Option A

Explanation: NonSerialized prevents a field from being serialized.

Q34

Which attribute specifies a default value for a property?

A Default
B Value
C Explanation: DefaultValue provides design-time default values.
D InitValue

Answer: Option C

Explanation: DefaultValue provides design-time default values.

Q35

Which attribute is used to specify code analysis suppression?

A Suppress
B IgnoreWarning
C Explanation: SuppressMessage disables specific code analysis warnings.
D CodeIgnore

Answer: Option C

Explanation: SuppressMessage disables specific code analysis warnings.

Q36

Which attribute helps control COM visibility?

A Explanation: ComVisible specifies whether a type is visible to COM.
B Interop
C ComAccess
D ExposeCom

Answer: Option A

Explanation: ComVisible specifies whether a type is visible to COM.

Q37

Which attribute specifies thread behavior of a method?

A ThreadSafe
B Explanation: STAThread specifies single-threaded apartment model.
C MultiThread
D ThreadMode

Answer: Option B

Explanation: STAThread specifies single-threaded apartment model.

Q38

When are attributes evaluated in C#?

A Only at compile time
B Only at runtime
C Explanation: Attributes are compiled into metadata and accessed at runtime using reflection.
D Only during debugging

Answer: Option C

Explanation: Attributes are compiled into metadata and accessed at runtime using reflection.

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