[Solved] Which of the following method signatures correctly declares a checked exception? — Ans: public void readFile() throws IOException | Java

Java - Exception Handling

Which of the following method signatures correctly declares a checked exception?

Apublic void readFile() throws NullPointerException

Bpublic void readFile() throws IOException

Cpublic void readFile() throws Error

Dpublic void readFile() throws RuntimeException

Step-by-Step Solution

Solution:

Step 1: Identify checked exceptions in options
IOException is a checked exception and must be declared.
Step 2: Check other options
NullPointerException, Error, and RuntimeException are unchecked or errors, so no need to declare.
Final Answer:
public void readFile() throws IOException -> Option B
Quick Check:
Checked exceptions require throws declaration [OK]

Quick Trick: Only checked exceptions need throws declaration [OK]

Common Mistakes:

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Which of the following method signatures correctly declares a checked exception?