Array bounds checking behavior in C Sharp (C#) - Cheat Sheet & Quick Revision

Recall & Review

beginner

What happens in C# when you try to access an array element outside its bounds?

C# throws an IndexOutOfRangeException to prevent accessing invalid memory.

beginner

Why does C# perform array bounds checking automatically?

To protect the program from errors and security issues by ensuring you only access valid array indexes.

intermediate

How can you catch an out-of-bounds error in C#?

Use a try-catch block to catch IndexOutOfRangeException and handle it gracefully.

intermediate

Does C# check array bounds at compile time or runtime?

Array bounds are checked at runtime, not at compile time.

intermediate

What is the benefit of array bounds checking in C# compared to languages like C?

It prevents bugs and crashes by stopping invalid memory access, making programs more stable and secure.

What exception does C# throw when accessing an array out of bounds?

A ArgumentException

B NullReferenceException

C IndexOutOfRangeException

D InvalidOperationException

C# throws IndexOutOfRangeException to indicate an invalid array index access.

When does C# perform array bounds checking?

A At compile time

B At runtime

C Only in debug mode

D Never

Array bounds checking happens at runtime to ensure safety during program execution.

Which of these is a benefit of array bounds checking in C#?

A Prevents invalid memory access

B Makes code run faster

C Allows accessing any memory location

D Removes the need for arrays

Bounds checking prevents invalid memory access, improving program safety.

How can you handle an out-of-bounds error in C#?

A Using try-catch for IndexOutOfRangeException

B Ignoring the error

C Using unsafe code only

D Using a debugger

You can catch the exception with try-catch to handle errors gracefully.

What happens if you access array index -1 in C#?

A Returns null

B Returns the last element

C Compiles but crashes later

D Throws IndexOutOfRangeException

Negative indexes are invalid and cause an IndexOutOfRangeException.

Explain how array bounds checking works in C# and why it is important.

Think about what happens when you try to access an invalid index.

Describe how you can handle errors caused by accessing arrays out of bounds in C#.

Consider how exceptions work in C#.