Quiz for Custom Exceptions

Q1: What is a custom exception in Java?

A. An exception with a custom message B. An exception created by the JVM C. A user-defined class that extends Exception or RuntimeException D. A checked error

Q2: Which class must be extended to create a checked custom exception?

A. RuntimeException B. Throwable C. Exception D. Error

Q3: Which class must be extended to create an unchecked custom exception?

A. Exception B. Throwable C. Error D. RuntimeException

Q4: Why would you create a custom exception?

A. To use different catch blocks B. To handle system-level errors C. To provide specific, meaningful error handling in your application D. To optimize performance

Q5: What is typically included in a custom exception class?

A. Static methods only B. Logger configuration C. Constructor(s) and optional message field D. Multithreading logic

Q6: How do you throw a custom exception?

A. Using catch B. Using throw new CustomException() C. Using new CustomException D. Using final

Q7: What should a custom exception class ideally be?

A. Private B. Final C. Serializable D. Transient

Q8: What keyword is used to create a new instance of a custom exception?

A. throws B. throw C. extends D. try

Q9: Which of the following is a valid custom exception class?

A. class MyEx extends Exception {} B. class MyEx implements Throwable {} C. class MyEx throws Exception {} D. class MyEx catch {}

Q10: What is the benefit of having multiple constructors in custom exceptions?

A. Increased execution speed B. Allows more flexibility in providing messages and causes C. Compiles faster D. Supports multithreading