Java Programming — Exception Handling Questions & Answers

Q.71 Medium Exception Handling

Analyze the code:
try {
// code
} catch (IOException | SQLException e) {
// handle
}
What is this syntax called?

A Multi-catch or union catch

B Chained exception handling

C Nested exception handling

D Parallel exception handling

Correct Answer: A. Multi-catch or union catch

EXPLANATION

This is called multi-catch or union catch syntax (Java 7+) allowing multiple exception types to be caught in one block using pipe operator.

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Q.72 Medium Exception Handling

What will happen if a finally block contains a return statement?

A It will override any return from try or catch block

B It will cause a compilation error

C It will be ignored

D It will execute but not return

Correct Answer: A. It will override any return from try or catch block

EXPLANATION

Return in finally block overrides returns in try or catch blocks. The finally return value is what gets returned.

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Q.73 Medium Exception Handling

What is the output?
public class Test {
public static void main(String[] args) {
int x = 0;
try {
x = 5;
System.out.println(x / 0);
x = 10;
} catch (ArithmeticException e) {
x = 15;
} finally {
System.out.println(x);
}
}
}

A 5

B 10

C 15

D Compilation error

Correct Answer: C. 15

EXPLANATION

x becomes 5, then ArithmeticException occurs. x becomes 15 in catch block. Finally block prints 15.

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Q.74 Medium Exception Handling

Which of these is NOT a correct way to handle checked exceptions?

A Using try-catch block

B Using throws keyword in method signature

C Using try-with-resources

D Ignoring it without any handling

Correct Answer: D. Ignoring it without any handling

EXPLANATION

Checked exceptions must be either caught or declared using throws. Ignoring them causes compilation error.

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Q.75 Medium Exception Handling

Consider the code:
try (FileReader fr = new FileReader("file.txt")) {
// use fr
} catch (IOException e) {
// handle
}
What will happen to 'fr' after the try block?

A It remains open and must be manually closed

B It is automatically closed

C It causes a compilation error

D It is closed only if exception occurs

Correct Answer: B. It is automatically closed

EXPLANATION

Try-with-resources automatically closes resources implementing AutoCloseable interface, regardless of normal or exceptional termination.

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Q.76 Medium Exception Handling

What happens if you throw an exception inside the finally block?

A The original exception is lost

B Both exceptions are thrown

C The finally block exception is ignored

D Compilation error occurs

Correct Answer: A. The original exception is lost

EXPLANATION

If an exception is thrown in finally block, it replaces the original exception that was being propagated. The original exception is lost.

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Q.77 Medium Exception Handling

Analyze the code:
public void process() throws IOException {
try {
readFile();
} catch (FileNotFoundException e) {
// handle
}
}
What is the issue here?

A No issue, it's correct

B FileNotFoundException should not be caught

C IOException should also be caught as it's broader

D throws IOException is redundant

Correct Answer: C. IOException should also be caught as it's broader

EXPLANATION

Since FileNotFoundException is a subclass of IOException, and readFile() can throw IOException, it should be caught in a separate catch block or the method signature should only throw FileNotFoundException.

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Q.78 Medium Exception Handling

Which statement about multiple catch blocks is TRUE?

A You can have multiple catch blocks, and all will execute

B You can have multiple catch blocks, but only one will execute

C Multiple catch blocks are not allowed in Java

D Multiple catch blocks execute in reverse order

Correct Answer: B. You can have multiple catch blocks, but only one will execute

EXPLANATION

Only one catch block executes for a thrown exception. The first matching catch block is executed.

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Q.79 Easy Exception Handling

What will be the output?
public class Demo {
public static void main(String[] args) {
try {
System.out.println("A");
throw new Exception("Test");
System.out.println("B");
} catch (Exception e) {
System.out.println("C");
}
}
}

A A C B

B A C

C A B C

D A

Correct Answer: B. A C

EXPLANATION

After 'A' is printed, exception is thrown. Statement 'B' is never executed. Catch block prints 'C'.

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Q.80 Easy Exception Handling

Which exception is thrown when a numeric string cannot be converted to a number?

A NumberFormatException

B ParseException

C ConversionException

D StringFormatException

Correct Answer: A. NumberFormatException

EXPLANATION

NumberFormatException is thrown by Integer.parseInt(), Double.parseDouble() when string format is invalid.

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