Difference between Exception and Error in java Exception Handling

Categories: Interview questions and answers Experienced Freshers Java

Difference between Exception and Error in java Exception Handling 

 

Q1. What are the two types of Exceptions in Java? Which are the differences between them? 

Answer: 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 boundary. On the other hand, checked exceptions must be declared in a method or a constructor’s throws clause. See here for tips on Java exception handling.

 

Q2. What is the difference between Exception and Error in java? 

AnswerException and Error classes are both subclasses of the Throwable class. The Exception class is used for exceptional conditions that a user’s program should catch. The Error class defines exceptions that are not excepted to be caught by the user program.

 

Q3. What is the difference between throw and throws? 

AnswerThe throw keyword is used to explicitly raise an exception within the program. On the contrary, the throws clause is used to indicate those exceptions that are not handled by a method. Each method must explicitly specify which exceptions does not handle, so the callers of that method can guard against possible exceptions. Finally, multiple exceptions are separated by a comma.

 

Q4. What is the importance of finally block in exception handling? 

AnswerA finally block will always be executed, whether or not an exception is actually thrown. Even in the case where the catch statement is missing and an exception is thrown, the finally block will still be executed. Last thing to mention is that the finally block is used to release resources like I/O buffers, database connections, etc.

 

Q5. What will happen to the Exception object after exception handling? 

AnswerThe Exception object will be garbage collected in the next garbage collection.

 

Q6. How does finally block differ from finalize() method? 

AnswerA finally block will be executed whether or not an exception is thrown and is used to release those resources held by the application. Finalize is a protected method of the Object class, which is called by the Java Virtual Machine (JVM) just before an object is garbage collected.

 

 

Top articles
Servlet interview questions and answers for experienced Published at:- Spring Interview Questions and Answer for Experienced Published at:- Spring Boot Features for Java Developers (2022) Published at:- Detecting build version and time at runtime in Spring Boot Published at:- AWS Interview Questions Answers for Freshers and Experienced Published at:- Laravel Interview Question Answer for Freshers and Experienced Published at:- Splunk Interview Questions and Answers for freshers and Experienced Published at:- IOS Interview Questions for freshers and experienced Published at:- Red Hat Interview Question Answers for Freshers and experienced Published at:- Python Interview Question and Answer Published at:- Basic Indian History General Knowledge Question and Answer (Quiz) Published at:- AWS Interview Question and Answer for freshers and Experienced Published at:- Angular 13 interview Question and Answer Published at:- Question bank for Limited Departmental Competitive Examination (LDC) examination Published at:- Question bank for Limited Departmental Competitive Examination (LDC) examination (Set 2) Published at:- Question bank for Limited Departmental Competitive Examination (LDC) examination (Set 3) Published at:- Limited Departmental Competitive examination (LDC) examination (Water supply) Published at:- Interview Question and answer for Limited Departmental Competitive Examination Published at:- Question bank for Limited Departmental Competitive Examination (LDC) examination (Soil mechanics) Published at:- Question bank for Limited Departmental Competitive Examination (LDC) examination Sanitary Engineering Published at:- Interview Question for Limited Departmental Competitive Examination (LDC) Principles of Surveying Published at:- Interview MCQ question for railways New Lines, Doublings & Gauge Conversion Projects Published at:- MCQ Interview Question and answer for Railway Station and Passenger Amenities Published at:- Interview Question and Answer for Railway preparation Published at:- PHP MCQ Quiz Question with Answer Published at:- PHP MCQ Quiz Question with Answer (set 2) Published at:- Angular MCQ Quiz Question and Answer Published at:- Angular MCQ Quiz Question and Answer Set 2 Published at:- Java General Interview Questions and Answer Published at:- Java Threads Interview Question and Answer for experienced Published at:- Java Collections Interview Question and Answer for freshers and experienced Published at:- Garbage Collector in Java Frequently Asked Questions and Answers Published at:- Difference between Exception and Error in java Exception Handling Published at:- Java Applets Interview Questions with Answer Published at:- Java Swing Interview Questions with Answer for freshers and experienced Published at:- Java Database Connectivity (JDBC) Interview Question and answer Published at:- Remote Method Invocation (RMI) Interview Question and Answer Published at:- Jakarta Server Page (JSP) programming language Interview Question and Answer Published at:- Write a program in Java to display the first 10 terms of the following series: 10, 20, 30, 40, …….. Published at:- Write the program in Java to display the first ten terms of the following series: 1, 4, 9, 16, Published at:-
R4Rin Team
The content on R4Rin.com website is created by expert teams.