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

Interview Questions and Answers - Order By Rating

Q31. What are the benefits of transitive depency in Maven ?

Ans. Transitive dependencies allows to avoid specifying the libraries that are required by the project which are specified in other dependent projects - Remote or Local.

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Usually asked to experienced developers.

Q32. What is a cyclic dependency ?

Maven

Ans. A has dependency of B, B has dependency of C and C has dependency of A

With Maven 2 , came transitive dependency wherein in above scenario, C will acts as a dependency of A as if this dependency has been defined directly in A but the negative side is that if it leads to cyclic dependency , it creates problems.

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Q33. Give an Example for Builder Pattern ?

Core Java

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

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Q34. What technologies have you worked with for build management ?

Ans. Ant and Maven

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Q35. What is the difference between Maven, Ant and Jenkins ?

Tool

Ans. Maven and Ant are Build Technologies whereas Jenkins is a continuous integration tool.

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Q36. Have you created any build script yourself ?

Ans. Yes, I have worked on many build scripts in last few years.

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Q37. Difference between jar , war and ear ?

Java EE

Ans. Jar is Java Archieve i.e compressed Class or Class / Java files.

War comprises of compressed Servlet class files,JSP FIles,supporting files, GIF and HTML files.

Ear comprise of compressed Java and web module files ( was files ).

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Q38. Which version control system you are using in your current project ?

Tools

Ans. We are using SVN and Git Hub.

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Q39. What are the various ways in which build can be scheduled in Jenkins ?

Jenkins

Ans. Builds can be triggered by source code management commits.
Can be triggered after completion of other builds.
Can be scheduled to run at specified time ( crons )
Manual Build Requests

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Q40. Which of the following is not a build tool or plugin ?

a. Maven
b. Ant
c. Gradle
d. svn

Tool

Ans. svn

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Almost sure to be asked in every company using any Dependency Injection framework ( Spring, Guice etc )

Q41. What is Dependency Injection or IOC ( Inversion of Control ) ?

Design

Ans. It is a Design Pattern that facilitates loose coupling by sending the dependency information ( object references of dependent object ) while building the state of the object. Objects are designed in a manner where they receive instances of the objects from other pieces of code, instead of constructing them internally and hence provide better flexibility.

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Q42. What is continuous integration ?

Process

Ans. Continuous integration or CI is the practice, of merging all developer working copies to a shared mainline several times a day.

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Q43. Write code for the usage of Builder Design Pattern

Ans. http://javasearch.buggybread.com/CodeSnippets/searchCodeSamples.php?&category=code&searchOption&keyword=964

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Q44. With the following code, Which is a valid way to initialize ?
public class BuggyBread {

   private String element1;

   private String element2;

   private BuggyBread(String element1, String element2){
      this.element1 = element1;
      this.element2 = element2;
   }

   public static class Builder {

      private String element1;

      private String element2;

      Builder(BuggyBread buggybread){
         element1 = buggybread.element1;
         element2 = buggybread.element2;
      }

      Builder withElement1(String element1){
         this.element1 = element1;
         return this;
      }

      Builder withElement2(String element2){
         this.element2 = element2;
         return this;
      }

      BuggyBread build(){
         BuggyBread buggybread = new BuggyBread(element1,element2);
         return buggybread;
      }
   }
}