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Core Java
32 topics · 170 questions
1JDK, JRE & JVM0/442Variables, Scope & var0/333Primitive Types & Wrappers0/11114Operators & Expressions0/995The main Method0/556Access Modifiers0/117Keywords: final0/448Keywords: static0/449Methods & Varargs0/3310Constructors & this/super0/3311Enum0/2212String & String Pool0/121213Immutability0/4414Arrays0/4415Object Class, equals & hashCode0/9916Upcasting & Dispatch0/2217Pass-by-Value & References0/2218Object Cloning0/2219Inner Classes0/2220Marker Interface0/1121Exception Hierarchy0/2222I/O & System0/3323Serialization & transient0/111124Annotations0/3325Recursion0/1126Reflection & Object Creation0/227Interface Evolution0/1128Class Loading & Compilation0/4429Memory Management & GC0/212130JVM Internals: Advanced0/101031JVM Tuning & Troubleshooting0/151532Predict the Output0/1010
1JDK, JRE & JVM42Variables, Scope & var33Primitive Types & Wrappers114Operators & Expressions95The main Method56Access Modifiers17Keywords: final48Keywords: static49Methods & Varargs310Constructors & this/super311Enum212String & String Pool1213Immutability414Arrays415Object Class, equals & hashCode916Upcasting & Dispatch217Pass-by-Value & References218Object Cloning219Inner Classes220Marker Interface121Exception Hierarchy222I/O & System323Serialization & transient1124Annotations325Recursion126Reflection & Object Creation227Interface Evolution128Class Loading & Compilation429Memory Management & GC2130JVM Internals: Advanced1031JVM Tuning & Troubleshooting1532Predict the Output10
32 topics170 Qs0%
01Core Java17002OOP3203Collections6704Exception Handling2805Concurrency & Multithreading12706Java Streams, Lambda & Functional Programming32807Spring & Spring Boot2608Transactions3209JPA & Hibernate6910Microservices19411Kafka & Messaging9112DevOps, CI/CD & Tooling13313Database & SQL14114REST API & Web4015Design Patterns & LLD5716Advanced Java7117Coding Problems: DSA49218AWS & Cloud4119Data Engineering19420QA, Testing & SDET4121System Design3522Security2023Behavioral / HR: STAR Method37
32Topics
170Questions
0%Complete
26 of 32 topics
Topics
1JDK, JRE & JVM0/442Variables, Scope & var0/333Primitive Types & Wrappers0/11114Operators & Expressions0/995The main Method0/556Access Modifiers0/117Keywords: final0/448Keywords: static0/449Methods & Varargs0/3310Constructors & this/super0/3311Enum0/2212String & String Pool0/121213Immutability0/4414Arrays0/4415Object Class, equals & hashCode0/9916Upcasting & Dispatch0/2217Pass-by-Value & References0/2218Object Cloning0/2219Inner Classes0/2220Marker Interface0/1121Exception Hierarchy0/2222I/O & System0/3323Serialization & transient0/111124Annotations0/3325Recursion0/11
26Reflection & Object Creation0/22
27Interface Evolution0/1128Class Loading & Compilation0/4429Memory Management & GC0/212130JVM Internals: Advanced0/101031JVM Tuning & Troubleshooting0/151532Predict the Output0/1010

Reflection & Object Creation

Core Java·Topic 26 of 32·2 questions
Q1What are the different ways to create an object in Java?

Objects can be created via new, reflection, clone, deserialization, or factory methods. new is the most common. Spring uses reflection internally for dependency injection.

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Q2What is the Reflection API?

Reflection lets you inspect and manipulate classes, fields, and methods at runtime without knowing them at compile time. Frameworks like Spring and JPA depend on it.

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Previous · Topic 25Recursion1 questionsNext · Topic 27Interface Evolution1 questions
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