Checked and unchecked exception

What are checked and unchecked exceptions in Java?

• Required and unchecked handling.
• Optional and handled exceptions.
• Handled and required exceptions.
• Required and optional handling.

What are the examples of checked and unchecked exceptions?

• RuntimeException, IOException.
• ArrayIndexOutOfBoundsException, NullPointerException.
• IOException, ClassNotFoundException.
• NullPointerException, ArithmeticException.

Which Java exceptions are unchecked?

• IOException.
• ClassNotFoundException.
• RuntimeException.
• SQLException.

What are the 4 checked exceptions in Java?

• NumberFormatException, NullPointerException, ArrayIndexOutOfBoundsException, ArithmeticException.
• FileNotFoundException, ClassNotFoundException, InterruptedException, SQLException.
• RuntimeException, IndexOutOfBoundsException, IllegalArgumentException, ConcurrentModificationException.
• IOException, SQLException, ClassNotFoundException, InterruptedException.

What is the difference between checked and unchecked exception?

• Checked at runtime, unchecked at compile time.
• Unchecked at runtime, checked at compile time.
• Checked at runtime and compile time.
• Unchecked at runtime and compile time.

Is NullPointerException checked or unchecked?

• Checked.
• Unchecked.
• Both.
• None.

What are the three unchecked exceptions?

• ClassNotFoundException, NullPointerException, IOException.
• IllegalArgumentException, ArrayIndexOutOfBoundsException, NullPointerException.
• NullPointerException, InterruptedException, NumberFormatException.
• UnsupportedOperationException, ClassCastException, IOException.

Which one is an unchecked exception?

• IOException.
• SQLException.
• ArrayIndexOutOfBoundsException.
• ClassNotFoundException.

What is the difference between throw and throws?

• Used interchangeably.
• "throw" is used to throw exceptions, "throws" is used in method declarations.
• "throw" is used in method declarations, "throws" is used to throw exceptions.
• Both are used to handle exceptions.

What is an IOException?

• Unchecked exception.
• RuntimeException.
• Checked exception.
• Compile-time error.