More than 3000 questions in repository. There are more than 900 unanswered questions. Click here and help us by providing the answer. Have a video suggestion. Click Correct / Improve and please let us know.
Q3031. What If we make the method as abstract in another Interface ?
public interface DefaultMethodInterface { default public void defaultMethod(){ System.out.println("DefaultMethodInterface"); } }
public interface DefaultMethodInterface2 { public void defaultMethod(){ System.out.println("DefaultMethodInterface2"); } }
public class HelloJava8 implements DefaultMethodInterface,DefaultMethodInterface2 { public static void main(String[] args){ DefaultMethodInterface defMethIn = new HelloJava8(); defMethIn.defaultMethod(); } }
Ans. Even then the Compiler will give error saying that there is a conflict.
Help us improve. Please let us know the company, where you were asked this question :
Q3032. What if we override the conflicting method in the Class ?
public interface DefaultMethodInterface { default public void defaultMethod(){ System.out.println("DefaultMethodInterface"); } }
public interface DefaultMethodInterface2 { default public void defaultMethod(){ System.out.println("DefaultMethodInterface2"); } }
public class HelloJava8 implements DefaultMethodInterface,DefaultMethodInterface2 { public static void main(String[] args){ DefaultMethodInterface defMethIn = new HelloJava8(); defMethIn.defaultMethod(); }
public void defaultMethod(){ System.out.println("HelloJava8"); } }
Ans. There won't be any error and upon execution the overriding class method will be executed.
Help us improve. Please let us know the company, where you were asked this question :
Q3033. What will happen if there is a default method conflict as mentioned above and we have specified the same signature method in the base class instead of overriding in the existing class ?
Ans. There won't be any problem as the Base class method will have precedence over the Interface Default methods.
Help us improve. Please let us know the company, where you were asked this question :
Q3034. If a method definition has been specified in Class , its Base Class , and the interface which the class is implementing, Which definition will be picked if we try to access it using Interface Reference and Class object ?
Ans. Class method definition is overriding both the definitions and hence will be picked.
Help us improve. Please let us know the company, where you were asked this question :
Q3035. If a method definition has been specified in the Base Class and the interface which the class is implementing, Which definition will be picked if we try to access it using Interface Reference and Class object ?
Ans. Base Class Definition will have precedence over the Interface Default method definition.
Help us improve. Please let us know the company, where you were asked this question :
Q3038. Can we have default method with same name and signature in the derived Interface as the static method in base Interface and vice versa ?
Ans. Yes , we can do that as static methods are not accessible using references and hence cannot lead to conflict. We cannot do inverse as Default methods cannot be overridden with the static methods in derived interface.
Help us improve. Please let us know the company, where you were asked this question :
Q3046. What things you would care about to improve the performance of Application if its identified that its DB communication that needs to be improved ?
Very frequently asked. Usually followed by questions related to private constructor and synchronized access. Frequently asked in JPMorgan and TCS (Based on 2 feedback)
Ans. It refers to the settings.xml to look for the repositories to look for the resource. First It looks into the configured local repository, then it looks into the configured Remote repositories. If the resource is still not found , it looks it within maven repository central i.e repo1.maven.org. If its still not found, it throws the exception saying "Unable to find resource in repository central".
Help us improve. Please let us know the company, where you were asked this question :
Ans. Its the repository provided by Maven. In case your POM specify the dependencies and its not available in the configured local and the remote repository. It then looks for the resource in Maven Central. Maven provides most of the generic dependency resources at this remote location.
Help us improve. Please let us know the company, where you were asked this question :
Ans. No. compareTo method is declared final for the Enumerations and hence cannot be overriden. This has been intentionally done so that one cannot temper with the sorting order on the Enumeration which is the order in which Enum constants are declared.
Help us improve. Please let us know the company, where you were asked this question :
Ans. In case we need to verify that a method is being called with any argument and not a specific argument we can use Mockito.any(Class), Mockito.anyString, Mockito.anyLong etc.
Help us improve. Please let us know the company, where you were asked this question :
Q3057. How should we ignore or avoid executing set of tests ?
Ans. We can remove @Test from the respective test so as to avoid its execution. Alternatively we can put @Ignore annotation on the Junit file if we want to ignore all tests in a particular file.
Help us improve. Please let us know the company, where you were asked this question :
Q3058. How can we test methods individually which are not visible or declared private ?
Ans. We can either increase their visibility and mark them with annotation @VisibleForTesting or can use reflection to individually test those methods.
Help us improve. Please let us know the company, where you were asked this question :
More than 3000 questions in repository.
Discuss 
java java8 default methods
Asked in 1 Companies
Frequently asked at Manhattan Associates ( Based on 2 feedback )
Sample Code for lambda
expert 
frequent
Try 1 Question(s) Test
Which Java version introduced Lambda expressions ?
