Interview Questions and Answers for 'Geometric' | Search Interview Question

Interview Questions and Answers for 'Geometric' - 3 question(s) found - Order By Newest

Frequently asked question in companies using hibernate.

Q1. Difference between first level and second level cache in hibernate ?

Ans. 1. First level cache is enabled by default whereas Second level cache needs to be enabled explicitly.

2. First level Cache came with Hibernate 1.0 whereas Second level cache came with Hibernate 3.0.

3. First level Cache is Session specific whereas Second level cache is shared by sessions that is why First level cache is considered local and second level cache is considered global.

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How to configure second level cache in Hibernate ?

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What are the the methods to clear cache in Hibernate ?

What are different types of second level cache ?

Can we disable first level cache ? What should one do if we don't want an object to be cached ?

Have you ever faced any problem due to caching?

Can you please provide an implementation of application level cache ?

Implement an LRU Cache ?

Q2. What is a ConcurrentHashMap ?

Core Java

Ans. ConcurrentHashMap is a hashMap that allows concurrent modifications from multiple threads as there can be multiple locks on the same hashmap.

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What is ConcurrentModificationException ?

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What are the advantages and disadvantages of CopyOnWriteArrayList ?

Name few Concurrent Collection Classes ?

Difference between concurrentHashMap and HashTable ?

isnt the use of HashTable and ConcurrentHashMap the same, i.e providing synchronized map collection ?

Frequently asked in face to face interviews.

Q3. Write a program to print fibonacci series.

Core Java

Ans. int count = 15;
int[] fibonacci = new int[count];
fibonacci[0] = 0;
fibonacci[1] = 1;
for(int x=2; x < count; x++){
fibonacci[x] = fibonacci[x-1] + fibonacci[x-2];
}

for(int x=0; x< count; x++){
System.out.print(fibonacci[x] + " ");
}

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