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Java
Dmitriy Gorbunov edited this page Jan 17, 2025
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- What is the difference between JDK, JRE and JVM?
- Do objects get passed by reference or value?
- Describe method signature
- What is the difference between overriding and overloading?
- What do you know about access modifiers?
- Can a constructor be inherited?
- Can a static method be overridden?
- What is
enum? - What is casting?
- What methods of Object class do you know?
- What do you know about anonymous classes?
- What is the difference between
final,finallyandfinalize? - What is the difference between int and Integer?
- What is the difference between inner classes and static nested classes?
- What do you know about
try-catch-finally? - Describe exception hierarchy
- Describe java memory model
- What is Java's Garbage Collection?
- What references types do you know?
- What is lambda expressions?
- What do you know about String pool?
- What is the difference between String, StringBuilder and StringBuffer?
- What is immutable object?
- What does transient keyword mean?
- What do you know about record?
- What do you know about generics?
- What do you know about wildcard?
- What is memory leak?
- What is the difference between Array and ArrayList?
- What are the basic interfaces of Java Collections Framework?
- Describe
Queueinterface from java collection - Describe
Dequeinterface from java collection - What do you know about
Iteratorinterface?
- Describe List interface
- What do you know about ArrayList?
- What do you know about LinkedList?
- What is the difference between ArrayList and LinkedList?
- What do you know about Stack?
- What do you know about Vector?
- Describe Map interface
- Describe how HashMap works
- What do you know about TreeMap?
- What do you know about ConcurrentHashMap?
- What do you know about Hashtable?
- What is the difference between Hashtable vs ConcurrentHashMap?
- What do you know about EnumMap?
- What do you know about LinkedHashMap?
- Describe Set interface
- What do you know about HashSet?
- What do you know about TreeSet?
- What is the difference between HashSet and TreeSet?
- What do you know about EnumSet?
- What do you know about LinkedHashSet?
- What is
interface? - What do you know about default method in interface?
- What is the difference between Abstract class and Interface?
- What do you know about Comparable interface?
- What do you know about Comparator interface?
- What is the difference between Comparable and Comparator interface?
- What do you know about Serializable interface?
- What is the difference between Stream and Iterator?
- What do you know about Clonable interface?
- What do you know about Executor interface?
- What do you know about
Streaminterface?