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| Module 1 | Java Overview |
| Java overview Interview Q&As | |
| Unit 1 | 17 Java Overview Interview Q&As - Preview |
| Unit 2 | 4 Java Compile-time Vs Runtime Interview Q&As - Preview |
| Module 2 | Java data types |
| Java data types interview Q&As on primitives, strings, memory allocation, autoboxing, etc | |
| Unit 1 | 8 Java data types interview Q&As - Preview |
| Unit 2 | 7 Java primitives & objects memory consumption Q&As - Preview |
| Unit 3 | 4 Java autoboxing & unboxing interview Q&As - Preview |
| Unit 4 | 12 Java String class Interview Q&As - Preview |
| Module 3 | Java modifiers, annotations, initializers & constructors |
| Java modifiers, initializers & constructors | |
| Unit 1 | 6 Java Modifiers every interviewer seems to like - Preview |
| Unit 2 | 10 Java initializers, constructors, regular methods and static factory methods Q&As |
| Unit 3 | 8 Java Annotations interview Q&As |
| Unit 4 | 4 Java annotation types & processing interview Q&As |
| Module 4 | Java classes, interfaces & class loaders |
| Java classes, interfaces & class loaders | |
| Unit 1 | 12 Java classes and interfaces interview Q&As |
| Unit 2 | 3 Abstract classes Vs interfaces interview Q&As |
| Unit 3 | 3 Java class loading interview Q&As to ascertain your depth of Java knowledge |
| Module 5 | Java Objects Interview Q&As |
| Object class methods equals( ), hashCode( ), toString( ), wait( ) & notify( ), immutable objects, serializing, casting, and cloning | |
| Unit 1 | 5 Java Object class methods interview Q&As - Preview |
| Unit 2 | 3 Object wait( ) & notify( ) interview Q&As |
| Unit 3 | 7 Object equals Vs == and pass by reference Vs value interview Q&As |
| Unit 4 | 10 Java immutable objects interview Q&As |
| Unit 5 | 10 Java serialization, cloning, and casting interview Q&As |
| Module 6 | OOP & FP |
| Programming paradigms OOP and FP | |
| Unit 1 | 10 Java OOP Interview Q&As |
| Unit 2 | 5 Inheritance Vs Composition OOP Interview Q&As - Preview |
| Unit 3 | 2 Polymorphism OOP Interview Q&As |
| Unit 4 | 8 OOP Design principles interview Q&As |
| Unit 5 | 5 OOP Vs FP, FP concepts & where to use FP Q&As - Preview |
| Unit 6 | 19 Java Functional Programming (i.e. FP) interview Q&As |
| Unit 7 | Java FP Lambda expressions by examples |
| Module 7 | Generics & Java Collection Framework(JCF) |
| Generics & Java Collection Framework(JCF) | |
| Unit 1 | 12 Java Generics Interview Q&As - Preview |
| Unit 2 | 5 Java Generics Wildcards Interview Q&As |
| Unit 3 | 17 Java Collection Framework (JCF) interview Q&As |
| Unit 4 | 9 Java data structures interview Q&As |
| Unit 5 | 4 Sorting objects in a Collection interview Q&As |
| Unit 6 | 8 Java Map interface & Caching interview Q&As |
| Unit 7 | Lambda expressions to work with Java 8 Collections |
| Module 8 | Java multithreading |
| Java multi-threading interview questions & answers. These are interviewers favourite as even the so called experienced struggle with this topic. | |
| Unit 1 | 17 Java multi-threading interview Q&As - Preview |
| Unit 2 | 7 Java locks & synchronized keyword interview Q&As |
| Unit 3 | 9 blocking, scheduling & daemon threads interview Q&As |
| Unit 4 | 7 Java Executor framework Interview Q&As |
| Unit 5 | ExecutorService Vs Fork/Join & Future Vs CompletableFuture Interview Q&As |
| Unit 6 | 7 Java ThreadLocal interview Q&As |
| Unit 7 | Java Thread stop, resume, suspend & interrupt interview Q&As |
| Unit 8 | 12 Java multi-threading differences between X and Y Q&As |
| Unit 9 | Java multi-threading 15 scenarios interview Q&As |
| Module 9 | What is wrong with this multithread code? |
Often interviewers test your ability to write multithreaded code & diagnose multi-threading issues | |
| Unit 1 | 5 Ways to debug Java thread-safety issues - Preview |
| Unit 2 | Heap Vs Stack, Thread safety & Synchronization - Preview |
| Unit 3 | Deep Vs Shallow comparison & multithreading |
| Unit 4 | An excellent written test multithreading question - wait/notify |
| Unit 5 | Multithreading & Locks |
| Unit 6 | Java Collection & ConcurrentModificationException |
| Unit 7 | HashMap & Race condition |
| Unit 8 | ConcurrentHashMap & Atomic operations |
| Unit 9 | JConsole for debugging deadlocks in Java |
| Unit 10 | jvisualvm to debug deadlocks in Java |
| Module 10 | Exceptions Handling |
| Java Exceptions Handling Interview Q&As | |
| Unit 1 | 5 Java exception handling interview Q&As |
| Module 11 | Java I/O & NIO |
| Java I/O & NIO Interview Q&As | |
| Unit 1 | 15 Java old I/O and NIO (i.e. New I/O) interview Q&As |
| Unit 2 | Java 8 way to reading files |
| Module 12 | JVM |
| Java Virtual Machine (i.e. JVM) interview Q&As | |
| Unit 1 | 11 JVM memory model and Atomicity, Visibility, and Ordering interview Q&As |
| Unit 2 | 8 Java Garbage Collection interview Q&As to ascertain your depth of Java knowledge |
| Unit 3 | jvisualvm to sample Java heap memory |
| Unit 4 | 5 JMX and MBean interview Q&As |
| Module 13 | What is new? |
| What is new in Java? | |
| Unit 1 | Java 7 features list |
| Unit 2 | Java 8 features list |
| Module 14 | Java code quality |
| Hire candidates who are passionate about writing quality code. | |
| Unit 1 | How will you go about improving on the following Java code? |
| Unit 2 | How will you go about ensuring code quality in Java apps? |
| Unit 3 | 5 Java unit testing interview Q&As |
| Unit 4 | Mocks, stubs, domain, and anemic objects interview Q&As |
| Unit 5 | 30+ Java Code Review Checklist Items |
| Module 15 | Debugging Java applications |
It requires right know-hows & experience to debug Java applications | |
| Unit 1 | 7 debugging Java interview questions & answers |
| Unit 2 | Debugging "NoSuchMethodError" in Java |
| Unit 3 | Debugging JAR hell issues in Java |
| Unit 4 | Debugging Java version issues |
| Unit 5 | Remote debugging in Java with Java Debug Wire Protocol (JDWP) |
| Unit 6 | Debugging like a pro with eclipse IDE tutorial for Java developers |
| Module 16 | Performance considerations & memory management |
| Performance and memory related issues are prevalent & pays to hire candidates with awareness & experience. | |
| Unit 1 | 4 Java application performance considerations interview Q&As |
| Unit 2 | 8 Java memory management interview Q&As |
| Unit 3 | jvisualvm to detect memory leak |
| Module 17 | Design Patterns Interview Q&As |
| Design patterns are popular in job interviews. If you are are beginner, some level of awareness and experience can impress the interviewers. | |
| Unit 1 | 12 Java design patterns interview Q&As |
| Unit 2 | 5 Java singleton design pattern interview Q&As |
| Unit 3 | Java Proxy, Decorator, Adapter, Bridge, and Facade design patterns Interview Q&As |
| Unit 4 | 3 Flyweight design pattern Interview Q&As to improve memory usage & performance |
