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What is try-with-resources?
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What is a `finally` block and when does it NOT execute?
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What is the difference between `throw` and `throws`?
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What is the difference between checked and unchecked exceptions?
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What are generics in Java?
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What is a `ConcurrentHashMap` and how does it differ from `HashMap`?
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What is the difference between `Comparable` and `Comparator`?
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What is the difference between `HashSet`, `LinkedHashSet`, and `TreeSet`?
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What is the difference between `HashMap` and `Hashtable`?
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What is the difference between `ArrayList` and `LinkedList`?
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What is the Java Collections Framework?
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What is the difference between composition and inheritance?
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What is a marker interface?
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What is the `instanceof` operator?
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What is a constructor? Can a constructor be private?
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Can we achieve multiple inheritance in Java?
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What is the difference between `this` and `super`?
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What is an abstract class vs. an interface?
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What is the difference between method overloading and method overriding?
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What are the four pillars of OOP in Java?
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