Real-world coding challenges for top company interviews ... A stack trace is information consisting of names of classes and methods that were invoked right from the start of program execution to the point where an exception occurred. This is useful to debug where exactly the exception occurred and due to what reasons. Consider an example stack trace in Java,

August 3, 2022 - This is a trick question, there is no problem with the code and it will compile successfully. We can always catch an Exception or any unchecked exception even if it’s not in the throws clause of the method. Similarly, if a method (foo) declares an unchecked exception in the throws clause, it is not mandatory to handle that in the program. ... package com.journaldev.exceptions; import java.io.IOException; public class TestException4 { public void start() throws IOException{ } public void foo() throws NullPointerException{ } } class TestException5 extends TestException4{ public void start() throws Exception{ } public void foo() throws RuntimeException{ } }

January 8, 2024 - A set of Java exceptions-related interview questions.

September 23, 2025 - Define NumberFormatException exception in Java. What do you understand by ArrayIndexOutOfBoundsException? Suppose there is a catch block in tune with a try block with 3 statements – 1, 2, and 3. Now, imagine that the statement is thrown in statement 2. Will there be an execution of statement 3? Define unreachable catch block error. You may find it overwhelming to answer such technical Java interview questions on exception handling for experienced developers.

October 23, 2024 - It is mandatory to know how do we handle exceptions in java , how to create a custom exception in java , what is serial ID , how to catch exception , how to throw exception , how to log exception , how to return exception code in java.

What is ClassCastException in Exception Handling? RunTimeException which occurs when JVM not able to cast an object of one type to another type is called ClassCastException. Q19. What is the difference between throws and throw in java? This is one of the most frequently asked interview questions for java developers.

April 17, 2023 - 30+ most likely Java Exception Handling Interview Questions And Answers for freshers and experienced, Java exceptions interview questions...

August 19, 2024 - Why your interviewer asks this: The interviewer wants to know what exceptions you have worked with. Interviewers ask this question to verify your Java exception vocabulary and gain insight into your experience with Java exceptions. When answering this question, include how you use try-catch, throws, throw, and finally blocks in your code.

May 9, 2025 - Ans: Throwable is the superclass for error and exception classes in Java. ... Ans: There are two types of exceptions available in Java API.

Questions from Error and Exception in Java mostly based on the concept of Exception and Error in Java, How to handle Exception , best practices to follow during Exception handling etc. Though multithreading, garbage collection, JVM concepts and questions from object oriented design rules these interviews, you should always expect and prepare some questions on effective error handling.

Java Exception Handling Interview Questions test the developer's deep understanding of Java's exception handling mechanisms, such as try-catch blocks, throw and throws keywords, and custom exception creation. Java Exception Handling Interview Questions for Experienced delves into scenarios involving stack traces, exception propagation, and best practices in managing runtime and checked exceptions.

Almost there... just a few more seconds

What are differences between checked and unchecked exceptions in java? Answer. This is very important Exception handling interview question in java.

Java has two types of exceptions: checked exceptions and unchecked exceptions. Unchecked exceptions do not need to be declared in a method or a constructor’s throws clause, if they can be thrown by the execution of the method or the constructor, and propagate outside the method or constructor ...

August 19, 2025 - ... Define exception handling in programming. Explain its purpose to handle runtime errors without breaking the application. Mention key components in Java (try, catch, finally, throw, throws).

In Java, if a method throws an exception and doesn't catch it, the exception is propagated to the calling method using the throws keyword." Why you might get asked this: Interviewers may ask you to write a program that demonstrates the use of a custom exception for invalid user input to evaluate your ability to design specific error-handling mechanisms tailored to unique application requirements, which is crucial for roles such as backend developers, for example.

October 26, 2024 - Exception propagation in Java occurs when an exception thrown from the top of the stack. When it is not caught, the exception drops down the call stack of the preceding method. If it is not caught there, it further drops down to the previous method.

August 22, 2025 - See also Top 20 React Native Interview Questions With Expert Answers · Checked exceptions are identified during compilation, ensuring proper handling. Unchecked exceptions surface at runtime and don’t require explicit handling. Checked exceptions enhance code reliability, while unchecked exceptions are ideal for non-recoverable errors. ... Built-in Exceptions in Java refer to pre-defined exception classes available in Java libraries, aiding in handling specific error scenarios.