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Interview Questions and Answers for 'Dell' - 8 question(s) found - Order By Newest

  Q1. What is a Lambda Expression ? What's its use ?Core Java
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Ans. Its an anonymous method without any declaration.

Lambda Expression are useful to write shorthand Code and hence saves the effort of writing lengthy Code.

It promotes Developer productivity, Better Readable and Reliable code.

  Sample Code for lambda

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   Like         Discuss         Correct / Improve     java   java8   lambda expression   architecture     Asked in 57 Companies      expert        frequent

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Advanced level question frequently asked in US based companies. Recently asked in EMC and Intuit.
  Q2. Can you provide some implementation of a Dictionary having large number of words ? Solution
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Ans. Simplest implementation we can have is a List wherein we can place ordered words and hence can perform Binary Search.

Other implementation with better search performance is to use HashMap with key as first character of the word and value as a LinkedList.

Further level up, we can have linked Hashmaps like ,

hashmap {
a ( key ) -> hashmap (key-aa , value (hashmap(key-aaa,value)
b ( key ) -> hashmap (key-ba , value (hashmap(key-baa,value)
....................................................................................
z( key ) -> hashmap (key-za , value (hashmap(key-zaa,value)
}

upto n levels ( where n is the average size of the word in dictionary.

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   Like         Discuss         Correct / Improve     java   collections   hashmap   binary search   search algorithm   advanced   architecture   data structure     Asked in 6 Companies        frequent

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Very frequently asked if being interviewed for hibernate. Frequently asked in Tata Consultancy (TCS) and Overstock.com
  Q3. Difference between load and get ?Hibernate
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Ans. If id doesnt exist in the DB load throws an exception whereas get returns null in that case.get makes the call to DB immediately whereas load makes the call to proxy.

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   Like         Discuss         Correct / Improve     hibernate     Asked in 16 Companies      basic        frequent


 Q4. What is the use of constructors in Java ?Core Java2017-04-07 10:13:18

Ans. Constructors are used to initialize the state of an object. If there are no constructor , objects won't have any initialized state and hence it's elements may contain garbage values. If the memory were used as is, the behavior of the object would also be unpredictable.

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   Like         Discuss         Correct / Improve     constructor     Asked in 5 Companies


 Q5. Solve the producer and consumer problemOperating System2017-06-15 08:18:53

 This question was recently asked at 'Dell'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     producer consumer problem  multi-process synchronization problem     Asked in 1 Companies


 Q6. Explain debugging Process2018-01-20 12:17:15

 This question was recently asked at 'Adella software'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve     debug     Asked in 1 Companies      basic


 Q7. What is an Interface ?Core Java2018-01-20 12:18:59

 This question was recently asked at 'Adella'.This question is still unanswered. Can you please provide an answer.


  Sample Code for interface

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   Like         Discuss         Correct / Improve     interface     Asked in 1 Companies      basic        frequent


 Q8. Which is the best collections for maintaining elements in an order ?Core Java2018-06-06 09:11:03

 This question was recently asked at 'Dell'.This question is still unanswered. Can you please provide an answer.


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   Like         Discuss         Correct / Improve          Asked in 1 Companies




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