Core Java

1. Java Features Basics
   1. Why java? Features of Java?
   2. OOPs concept
   3. OOPs Java Specific Questions
   4. Compile Time polymorphism and rum time polymorphism
   5. Static binding and Dynamic binding
2. Java Virtual Machine
   • JVM Architecture
   • Class Loader
   • Runtime Data Area
   • Flow of Code inside JVM
   • Heap(in detail and all Generations and memory leak example)
   • JConsole to check JVM
   • Execution Engine
   • JDK, JRE and JIT
   • Types of Virtual Machine
   • Garbage Collection(In Detail)
   • Class File structure
   • All the folders and jars inside jre folder
   • CustomeClassLoader
   • Improve Memory Utilization in Java
   • JVM Oracle Documentation PDF
   • JVM CommandLine options
3. Java Building Blocks
   1. Primitive and non primitive data type in java
   2. Operators and Statement
      1. Bitwise Operator
      2. Two’s Complement
   3. String and String pool in java
   4. Modifiers
      • Access Modifers
      • NonAccess Modifiers
   5. Type Casting
   6. imports and static imports
   7. Instance initializer block
   8. Arrays
   9. vargs
   10. JAR, WAR and EAR in java
   11. Serialization in java
   12. Cloning in java
   13. RandomAccess Interface
   14. Autoboxing and Unboxing
   15. native keyword in java
   16. Annotations in java
   17. I18N
4. OOP Concept
   1. Constructors
   2. Instance Initializer Block
   3. Inner Class
   4. Inheritance
   5. Aggregation
   6. Composition
   7. Static Block, Class, Method, Variable, Object
   8. final keyword
   9. static keyword
   10. native keyword
   11. volatile keyword
   12. transient keyword
   13. strictfp keyword
   14. abstract keyword on variables
   15. this
   16. super
   17. Method Overloading and Method Overriding
   18. Userstanding MAIN method in java and Main methods overloaded
   19. Inner Class
   20. Anonymous Inner Class
   21. Interface
   22. Marker Interface
       • Serializable Interface
       • Cloneable Interface
       • Remote Interface
       • RandomAccess Interface
   23. Abstract Class
   24. Refelection
   25. Enum
   26. instanceOf
5. Collections and Data Structures in java
6. Encapsulation
7. Exception Handling
8. Java File IO API
   1. File
   2. FileWriter (character by character)
   3. FileReader (character by character)
   4. BufferedWriter (line by line)
   5. BufferedReader (line by line)
   6. PrintWriter (line by line with primitive support)
   7. InputStreamReader and OutputStreamWriter (For Image,Video and Audio Read and Write)
   8. FileInputStream and FileOutputStream
   9. RandomAccessFile
9. Serialization and Deserialization
   1. What is Serialization and Deserialization
   2. Object Graph in Serialization
   3. Customized Serialization
   4. Serialization with Respect to inheritance
   5. Externalization
10. Generics
    1. Why Generics in java? and What is Generic Class
    2. Generic Method
    3. Bounded Type Parameter
    4. Unbounded Wildcard
    5. Type Erasure
11. Complexity Of an Algorithm
12. Reflection API
13. Sorting Algorithm
    1. Bubble Sort
    2. Quick Sort
    3. Merge Sort
    4. Insertion Sort
    5. Heap Sort
    6. Selection Sort
    7. Smooth Sort
    8. Bogo Sort
14. Searching Algorithm
15. About project Lombok
16. JKS (Java Key Store)
17. Log4j2
18. Increase Performance of Eclipse

Command Line :

1. Java Compile
2. Java Execute
3. JAR Creation, Execution and Updation
4. JAR Manifest

Interview Reference :

• JavaPoint-300
• Java67-Mater

1. Why refelection in java