C# Programming Advanced Quiz 4
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Advanced Quiz 4
1. Explain the "dynamic" type in C# and when it is useful.
A type that bypasses compile-time type checking, useful for interop, reflection, or dynamic language features.
Allocates memory for a new object in a specific memory block.
Creates a new class instance at compile time.
2. What are "weak references" in C# and when would you use them?
References that do not prevent an object from being garbage collected, useful for caches.
Symbols that are not yet defined.
Symbols that are prone to errors.
3. What is the purpose of
Debug.Assert()
in C#?
Tests a condition; if false, it displays a message and breaks execution in debug mode (used for debugging).
Used to declare an assertion for multi-threading.
Asserts that a function will return a specific value.
4. Explain the difference between a "macro" and a "method" in C#.
C# does not support macros; methods are compiled code and type-checked.
Methods are always inlined, macros are always external.
Macros support recursion, methods do not.
5. What is "aliasing" in C# and why is it a concern?
When multiple references point to the same object, potentially causing unintended side effects.
When a variable is given an alias name.
When pointers are not initialized correctly.
6. Describe "atomic operations" and why they are important in concurrent programming.
Operations that complete entirely without interruption, crucial to prevent race conditions and ensure data integrity in multi-threaded environments.
Operations that are very fast.
Operations that involve atomic data types only.
7. What is the purpose of "thread-safe" collections in C#?
Collections that can be safely accessed by multiple threads concurrently.
Collections that return multiple values.
Collections that can be entered multiple times within the same call.
8. Explain the use of
params
,
ref
, and
out
keywords.
params
allows variable arguments;
ref
passes arguments by reference;
out
passes arguments by reference and must be assigned in the method.
Used for dynamic memory allocation of arrays.
Tools for debugging function calls.
9. What is the
nameof
operator and its utility?
Returns the name of a variable, type, or member as a string, useful for refactoring and error messages.
Used to find the offset of a pointer in an array.
Calculates the offset of an array from the start of a function.
10. Differentiate between "value equality" and "reference equality" in C#.
Value equality compares the contents; reference equality checks if two references point to the same object.
Value equality is a literal value, reference equality is a variable.
They are interchangeable depending on context.
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