Interview Questions and Answers for 'R system' | Search Interview Question

Interview Questions and Answers for 'R system' - 5 question(s) found - Order By Rating

Q1. How to Create Cron Job in Hybris e-commerce suite

^{This question was recently asked at 'Patni Computer Systems,IGate'.This question is still unanswered. Can you please provide an answer.}

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_{Like Discuss Correct / Improve Asked in 2 Companies}

Q2. Explain OOPs

or

Explain OOPs Principles

or

Explain OOPs Concepts

or

Explain OOPs features

or

Tell me something about OOPs

Core Java

Ans. OOPs or Object Oriented Programming is a Programming model which is organized around Objects instead of processes. Instead of a process calling series of processes, this model stresses on communication between objects. Objects that all self sustained, provide security by encapsulating it's members and providing abstracted interfaces over the functions it performs. OOP's facilitate the following features

1. Inheritance for Code Reuse
2. Abstraction for modularity, maintenance and agility
3. Encapsulation for security and protection
4. Polymorphism for flexibility and interfacing

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_{Like Discuss Correct / Improve oops oops features Asked in 260 Companies basic frequent}

Q3. Write a Program to print factorial of a number using recursion

Core Java

Ans. public class BuggyBread {
public static void main(String args[]) {
System.out.println(factorial(5));
}

private static int factorial(int number){
if(number == 1){
return 1;
} else {
return number * factorial(number - 1);
}
}
}

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_{Like Discuss Correct / Improve recursion Asked in 25 Companies}

Very Frequently asked. Favorite question in walkins and telephonic interviews. Usually among first few questions. Asked in different variants. Must know for intermediate and expert professionals.Among Top 10 frequently asked questions.

Q4. What is rule regarding overriding equals and hashCode method ?

Core Java

Ans. A Class must override the hashCode method if its overriding the equals method.

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_{Like Discuss Correct / Improve java collections hashcode hash code equals collections Asked in 44 Companies intermediate frequent}

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Q5. Give an Example for Builder Pattern ?

Core Java

Ans. String str = new StringBuilder().append("Buggy").append("Bread").toString();

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_{Like Discuss Correct / Improve java builder pattern design pattern stringbuilder string Asked in 3 Companies}

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