C# Programming Advanced Quiz 3
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Advanced Quiz 3
1. What is the role of
IDisposable
and the
Dispose()
method?
To provide a mechanism for releasing unmanaged resources deterministically.
To define a new variable type.
To declare a global function.
2. Explain "undefined behavior" in the context of C# (if any).
C# minimizes undefined behavior through runtime checks, but issues like accessing null references or array out-of-bounds can cause exceptions.
All behavior is defined by the compiler vendor.
Behavior is always predictable in C#.
3. How can you read a line of input of unknown length from the console in C#?
Using
Console.ReadLine()
, which reads the next line as a string.
Using
scanf()
directly.
C# does not support reading lines of unknown length.
4. What is the purpose of the
yield return
statement in C#?
To create an iterator block that returns elements one at a time, enabling lazy evaluation.
To define and call functions dynamically.
To set and retrieve environment variables.
5. Differentiate between stack and heap memory allocation in C#.
Stack is for local value types, fixed size, automatic management. Heap is for objects and reference types, managed by the garbage collector.
Stack is for global variables, heap for local variables.
Heap is faster than stack.
6. What are "extension methods" and their purpose in C#?
Static methods that can be called as if they were instance methods on existing types, used to add functionality without modifying the type.
Functions that can be called from anywhere in the program.
Functions that are defined within a single line of code.
7. Explain the concept of "type inference" in C#.
The compiler determines the type of a variable based on the assigned value (e.g., with
var
).
Casting a pointer to a function type.
Assigning multiple types to a single variable.
8. What is the use of
StringBuilder
and why is it preferred over string concatenation in loops?
It provides efficient mutable string manipulation, avoiding the overhead of creating new string instances with each concatenation.
StringBuilder
is for printing to the console.
string
is deprecated.
9. How do you check for memory leaks in a C# application?
Using memory profiling tools or by monitoring object references and event subscriptions.
By checking the return value of
Main()
.
C# compilers automatically detect memory leaks.
10. What are "params" arrays in C#?
A way to pass a variable number of arguments to a method.
Functions that return different types of values.
Functions that are declared with the
var
keyword.
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