[Solved] Find the error in this code snippet:public void open() throws FileNotFoundException { // code } public void start() throws IOException { open(); } | Java

Java - Exception Handling

Find the error in this code snippet:

public void open() throws FileNotFoundException {
    // code
}
public void start() throws IOException {
    open();
}

Astart() must declare FileNotFoundException explicitly

Bstart() correctly declares IOException, no error

Copen() cannot throw FileNotFoundException

DFileNotFoundException is unchecked, no need to declare

Step-by-Step Solution

Solution:

Step 1: Understand exception hierarchy
FileNotFoundException is a subclass of IOException.
Step 2: Analyze start() declaration
Declaring throws IOException covers all its subclasses including FileNotFoundException.
Final Answer:
start() correctly declares IOException, no error -> Option B
Quick Check:
Superclass exception declaration covers subclasses [OK]

Quick Trick: Superclass exceptions cover subclass exceptions in throws [OK]

Common Mistakes:

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