Interview Questions and Answers for 'Eci telecom' | Search Interview Question

Interview Questions and Answers for 'Eci telecom' - 7 question(s) found - Order By Newest

Very Frequently asked. Have been asked in HCL Technologies very frequently ( based on 3 feedback ). Among first few questions in many interviews.

Q1. Differences between abstract class and interface ?

Core Java

Ans. Abstract classes can have both abstract methods ( method declarations ) as well as concrete methods ( inherited to the derived classes ) whereas Interfaces can only have abstract methods ( method declarations ).

A class can extend single abstract class whereas it can implement multiple interfaces.

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_{Like Discuss Correct / Improve java classes abstract class interfaces abstract class vs interface abstract classes vs interfaces Asked in 82 Companies basic frequent}

Very Frequently asked to Senior Software Engineers or Developers.

Q2. Describe some of the Design Patterns you have used ?

Design

Ans. [Open Ended Answer]

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_{Like Discuss Correct / Improve design patterns Asked in 17 Companies intermediate frequent}

Q3. Explain JMS ( Java Messaging Services ) ?

JMS

Ans. JMS Provides high-performance asynchronous messaging. It enables Java EE applications to communicate with non-Java systems on top of various transports.

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Very frequently asked. Usually followed by questions related to private constructor and synchronized access. Frequently asked in JPMorgan and TCS (Based on 2 feedback)

Q4. Explain Singleton Design Pattern ?

Design

Ans. http://www.buggybread.com/2014/03/java-design-pattern-singleton-interview.html

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_{Like Discuss Correct / Improve java design pattern singleton at&t ebay fidelity india united healthcare india Asked in 46 Companies intermediate frequent}

Q5. Write code for singleton class

Design

Ans. http://javasearch.buggybread.com/CodeSnippets/searchCodeSamples.php?keyword=singleton+class&category=code

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_{Like Discuss Correct / Improve singleton code coding design pattern Asked in 1 Companies Intermediate frequent}

Q6. Write a Program to merge two sorted arrays ?

Data Structure

Ans. We can merge two sorted array by using quick sort algorithm

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Q7. Design a Coffee machine using Oops concepts.

Design

^{This question was recently asked at 'ECI Telecom'.This question is still unanswered. Can you please provide an answer.}

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