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Core java - Interview Questions and Answers for 'Geometric' - 2 question(s) found
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Q1.
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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 java   collections   hashmap   map   concurrenthashmap   concurrenthashmap  concurrency   general electric   ge
Asked in 32 Companies
 
rare
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What is ConcurrentModificationException ?
What is a BlockingQueue?
What is concurrent interface ?
What is ConcurrentLinkedDeque ?
What is CopyOnWriteArrayList ?
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.
Q2.
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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 ebay   fibonacci series
Asked in 66 Companies
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