Multiple catch blocks in C Sharp (C#) - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to catch a general exception.

C Sharp (C#)

try {
    int result = 10 / 0;
} catch ([1] e) {
    Console.WriteLine("Error occurred");
}

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Astring

Bint

CException

Ddouble

Attempts:

3 left

💡 Hint

Common Mistakes

Using a data type like int or string instead of Exception.

Missing the exception type in the catch block.

The Exception type is used to catch general exceptions in C#.

2fill in blank

medium

Complete the code to catch a specific exception type for division by zero.

C Sharp (C#)

try {
    int result = 10 / 0;
} catch ([1] e) {
    Console.WriteLine("Cannot divide by zero.");
}

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AFormatException

BNullReferenceException

CIndexOutOfRangeException

DDivideByZeroException

Attempts:

3 left

💡 Hint

Common Mistakes

Using unrelated exception types like NullReferenceException.

Catching the wrong exception type.

The DivideByZeroException is thrown when division by zero occurs.

3fill in blank

hard

Fix the error in the catch block to catch multiple exceptions separately.

C Sharp (C#)

try {
    string text = null;
    Console.WriteLine(text.Length);
} catch ([1] e) {
    Console.WriteLine("Null reference error.");
} catch (Exception e) {
    Console.WriteLine("General error.");
}

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AException

BNullReferenceException

CDivideByZeroException

DFormatException

Attempts:

3 left

💡 Hint

Common Mistakes

Using Exception in the first catch block instead of NullReferenceException.

Not ordering catch blocks from specific to general.

The NullReferenceException is used to catch errors when accessing members of a null object.

4fill in blank

hard

Fill both blanks to catch specific exceptions and a general exception.

C Sharp (C#)

try {
    int[] numbers = {1, 2, 3};
    Console.WriteLine(numbers[5]);
} catch ([1] e) {
    Console.WriteLine("Index error.");
} catch ([2] e) {
    Console.WriteLine("Other error.");
}

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AIndexOutOfRangeException

BDivideByZeroException

CException

DNullReferenceException

Attempts:

3 left

💡 Hint

Common Mistakes

Reversing the order of catch blocks.

Using unrelated exception types.

The IndexOutOfRangeException catches errors when accessing invalid array indexes, and Exception catches all other errors.

5fill in blank

hard

Fill all three blanks to catch multiple exceptions and print their messages.

C Sharp (C#)

try {
    string input = null;
    int length = input.Length;
    int result = 10 / 0;
} catch ([1] e) {
    Console.WriteLine("Null error: " + e.Message);
} catch ([2] e) {
    Console.WriteLine("Divide error: " + e.Message);
} catch ([3] e) {
    Console.WriteLine("General error: " + e.Message);
}

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

ANullReferenceException

BDivideByZeroException

CException

DIndexOutOfRangeException

Attempts:

3 left

💡 Hint

Common Mistakes

Incorrect order of catch blocks.

Using wrong exception types for the errors.

Catch NullReferenceException first, then DivideByZeroException, and finally the general Exception.