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[Solved]: Maven Error "Failed to execute goal org.apache.maven.plugins:maven-surefire-plugin:2.12.4:test (default-test) on project XYZ: There are test failures."
[Solved] Spring Data JPA :QueryCreationException: Could not create query for public abstract method XYZ
[Solved] Java UnsupportedClassVersionError : Compiled by a more recent version of the Java Runtime (class file version X), this version of the Java Runtime only recognizes class file versions up to Y
[Solved] java.lang.ClassCastException: org.apache.logging.slf4j.SLF4JLoggerContext cannot be cast to org.apache.logging.log4j.core.LoggerContext
[Solved] TESSDATA_PREFIX environment variable is set to the parent directory of your "tessdata" directory.

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  - if
  - if-else
  - if-else if
  - switch
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- Branching
  - break
  - continue
  - return

Reachability of Statements

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Unary Operators
Arithmatic Operators
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Boolean Operators
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Operators Precedence

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static keyword
this keyword

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Aggregation Vs Composition
super keyword
Constructor Chaining

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Compiletime Polymorphism
Method Overriding
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Overloading vs Overriding
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Instance Initializer Block
final Keyword
Dynamic Binding
instanceof Operator

Java Abstraction

Abstract Class
Interface
Nested Interface
Marker Interface
Abstract Vs Interface

Java Encapsulation

Package
Import
Access Modifiers

OOPS Misll.

Java Object Class
Object Cloning
Shallow Vs Deep Cloning
Wrapper Class
- Byte
- Short
- Integer
- Long
- Float
- Double
- Boolean
- Character
- Number
strictfp keyword

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