CPP225 Object Oriented Programming I - Value and Reference Types Quiz
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CPP225 Object Oriented Programming I - Value and Reference Types Quiz

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@RedeemingDaffodil

Questions and Answers

What is the main purpose of System.ValueType in C#?

To ensure that the derived type is allocated on the stack

What is the main advantage of stack-allocated data in C#?

It can be created and destroyed quickly

What happens to a structure variable when it falls out of the defining scope in C#?

It is removed from memory immediately

How are value types handled when assigned to each other in C#?

<p>The field data is copied member by member</p> Signup and view all the answers

What is the primary member to copy when assigning one simple data type such as System.Int32 to another in C#?

<p>The numerical value</p> Signup and view all the answers

What ensures that heap-allocated data has a lifetime determined by a large number of factors in C#?

<p>.NET garbage collector</p> Signup and view all the answers

What happens when the value of p1.X is changed in the Point example?

<p>The value of p2.X remains unaffected</p> Signup and view all the answers

In the PointRef example, why does changing the value of p3.X also affect p4.X?

<p>Because p3 and p4 point to the same object on the heap</p> Signup and view all the answers

What is the purpose of the ShapeInfo class?

<p>To maintain an informational string for PointRef instances</p> Signup and view all the answers

What will be the output when both p1 and p2 are displayed in the Point example?

<p>X = 10, Y = 10 for both p1 and p2</p> Signup and view all the answers

Why does changing the value of p3.X also affect p4.X in the PointRef example?

<p>p3 and p4 point to the same object on the heap</p> Signup and view all the answers

What is the major difference between value types and reference types?

<p>Value types store data on the stack, while reference types store data on the heap</p> Signup and view all the answers

In which scenario are two copies of a type created on the stack?

<p>When using a struct to create variables</p> Signup and view all the answers

What happens when a reference type is assigned to another?

<p>The reference variable points to what the other reference variable points to in memory</p> Signup and view all the answers

When is a custom constructor used in C#?

<p>To create new instances of classes or structures</p> Signup and view all the answers

"Being a reference type" implies that:

<p>&quot;The type contains references to other types&quot;</p> Signup and view all the answers

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