java tricky questions

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Get Free GPT4o from https://codegive.com • sure! here’s a tutorial on some tricky java questions that often confuse developers, along with explanations and code examples. these questions typically focus on common pitfalls, nuances of the language, and behavior of java constructs. • 1. *string pool and string comparison* • *question:* what is the difference between `==` and `.equals()` when comparing strings? • *explanation:* in java, `==` checks for reference equality (i.e., whether both references point to the same object in memory), while `.equals()` checks for value equality (i.e., whether the contents of the objects are the same). • *example:* • • 2. *immutable objects* • *question:* why are strings immutable in java? • *explanation:* strings in java are immutable, meaning once a string object is created, it cannot be changed. this design choice allows for optimizations, such as string pooling, and ensures thread safety when using strings. • *example:* • • 3. *nullpointerexception* • *question:* what causes a `nullpointerexception`? • *explanation:* a `nullpointerexception` occurs when you attempt to use a reference that points to `null`. this can happen when accessing methods or fields on a null reference. • *example:* • • 4. *for-each loop and modifications* • *question:* can you modify a collection while iterating through it using a for-each loop? • *explanation:* no, modifying a collection while iterating through it using a for-each loop will throw a `concurrentmodificationexception`. you should use an iterator for safe modifications. • *example:* • • 5. *static vs instance methods* • *question:* can you override a static method? • *explanation:* no, static methods cannot be overridden in java. they can be hidden, but this is not the same as overriding. when a static method is called, it is determined by the reference type, not the object type. • *example:* • • 6. *default method in interfaces* • *question:* what are default methods in interfaces? • **explanatio ... • #python java • #python javatpoint • #python java or c++ • #python java compiler • #python javatpoint interview questions • python java • python javatpoint • python java or c++ • python java compiler • python javatpoint interview questions • python javadoc • python javascript • python java c++ • python java difference • python java course • python questions for beginners • python questions leetcode • python questions for data engineer • python questions for practice • python questions for data analyst • python questions to solve • python questions for interview • python tricky coding interview questions

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