hCentive Java Interview Questions
Carvia Tech | December 31, 2017 | 1 min read | 52 views
Multi-threading Questions
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What do you understand by thread-safety ? What are various mechanisms to achieve thread-safety in java ?
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How will you design your own ReentrantReadWriteLock class where one thread can write and many threads can read in parallel ? How does it affect the throughput of a multi-threaded system ?
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What are various methods to acquire lock in java ? discuss their comparison.
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How to avoid deadlock in your application ?
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How is ConcurrentHashMap better than hashmap in java ?
General Java
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What are different memory generations in Java ? What is Stack and heap memory ?
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Write a thread-safe Singleton Java Class.
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What is difference between hashtable, hashmap and Concurrenthashmap in java ?
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What is difference between Iterator and ListIterator in Java ?
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What is Immutable Class ? What is reason behind using a Immutable class in your application ?
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What is difference between String, StringBuffer and StringBuilder ?
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What is difference between CheckedException and UncheckedException ? Give some example of RuntimeException ?
Spring Framework
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What are different Bean scopes in Spring ? What is the default bean scope ?
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How many objects Spring container creates for a given bean definition ?
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What is Bean Lifecyle ?
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How do you encrypt a password in spring security ?
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Describe practical use of Spring Interceptors ?
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What is Servlet LifeCycle ?
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How do you declare a custom error page in Spring ?
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What is difference between doGet() and doPost() methods ?
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What is difference between Forward and Redirect ?
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