Finally block behavior in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to ensure the finally block always executes.

C Sharp (C#)

try {
    Console.WriteLine("Try block");
} [1] {
    Console.WriteLine("Finally block");
}

Drag options to blanks, or click blank then click option'

Aelse

Bcatch

Cwhen

Dfinally

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'catch' instead of 'finally' causes the block to run only on exceptions.

Using 'else' or 'when' are invalid here.

The finally block always runs after the try block, regardless of exceptions.

2fill in blank

medium

Complete the code to catch exceptions and still run the finally block.

C Sharp (C#)

try {
    int x = 5 / 0;
} [1] (DivideByZeroException ex) {
    Console.WriteLine("Caught exception");
} finally {
    Console.WriteLine("Always runs");
}

Drag options to blanks, or click blank then click option'

Ausing

Bfinally

Ccatch

Dthrow

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'finally' instead of 'catch' to handle exceptions.

Using 'throw' or 'using' here is incorrect.

The catch block handles exceptions, and the finally block runs after that.

3fill in blank

hard

Fix the error in the code to ensure the finally block runs after the try-catch.

C Sharp (C#)

try {
    Console.WriteLine("Start");
} catch (Exception ex) {
    Console.WriteLine("Error");
} [1] {
    Console.WriteLine("Cleanup");
}

Drag options to blanks, or click blank then click option'

Afinally

Bcatch

Cthrow

Delse

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'catch' again instead of 'finally'.

Using 'throw' or 'else' causes syntax errors.

The finally block must be used to run code after try-catch regardless of exceptions.

4fill in blank

hard

Fill both blanks to complete the try-catch-finally structure correctly.

C Sharp (C#)

try {
    int[] arr = new int[2];
    Console.WriteLine(arr[3]);
} [1] (IndexOutOfRangeException ex) {
    Console.WriteLine("Index error");
} [2] {
    Console.WriteLine("Always runs");
}

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Acatch

Bfinally

Cthrow

Dusing

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping 'catch' and 'finally' keywords.

Using 'throw' or 'using' in these positions.

The catch block handles the exception, and finally runs always after try-catch.

5fill in blank

hard

Fill all three blanks to create a try-catch-finally that throws and cleans up properly.

C Sharp (C#)

try {
    Console.WriteLine("Start");
    throw new Exception("Error");
} [1] (Exception ex) {
    Console.WriteLine(ex.Message);
    [2];
} [3] {
    Console.WriteLine("Cleanup done");
}

Drag options to blanks, or click blank then click option'

Acatch

Bthrow

Cfinally

Dreturn

Attempts:

3 left

💡 Hint

Common Mistakes

Omitting 'throw' causes the exception to be swallowed.

Using 'return' inside catch changes flow incorrectly.

Misplacing 'finally' block.

The catch block catches the exception, throw rethrows it, and finally runs cleanup code.