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Q301. What is Throwable ?

Ans. Throwable in java is a class that is the superclass of all exceptions and errors which may occurs in java program.It extends obcect class.

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What things should be kept in mind while creating your own exceptions in Java?

Difference between Checked and Unchecked exceptions ?

Explain throw, throws , try and catch in Java ?

Differences between class not found exception and noclassdef found error ?

Is it necessary that each try block to be followed by catch block ?

What is exception propogation ?

Can we have try and catch blocks within finally ?

When does the finally block gets executed ?

When is the situation when finally section won't execute ?

How does a try statement determine which catch clause should be used to handle an exception?

Q302. What are the benefits of Java over other Programming Languages ?

Core Java

Ans. 1. JVM that makes it platform independent and facilitates portability.
2. Garbage Collector that protects from Memory Leaks.
3. Only usage of references and not pointer arithmetic and hence protects the application from memory issues like dangling pointers, memory leaks etc.
4. Support for OOPs that makes application development and maintenance easy.
5. Facilitates library development through use of interface / abstract classes.
6. Facilitates creation of scalable applications.
7. Huge repository of libraries and pool of people with java skill.

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Q303. Which one of AWS Lambda or API Gateway is a compute service ?

Amazon Web Services (AWS)

Ans. AWS Lambda

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What are the problems one could face while working with serverless technologies like AWS Lambda ?

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Tell me something about Amazon Lambda.

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Can we build web services using AWS Lambda ?

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