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|Interview Questions and Answers for 'Arvato systems' - 1 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.|
|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 GlobalLogic HCL Technologies Tata Consultancy (TCS) Infosys Wipro Mindtree CapitalOne Accenture IBM India Infoview Technologies Salesforce AT&T United Health Group (UHG) Verilogue Amazon Expeditors Syntel SalesForce Cornerstone OnDemand Expedia OLA NSF International Copper Mobile Think Future Technologies MorphoTrust Global Healthcare Prodigious Internet Brands SciQuest arvato Systems iCIMS Ideas2IT virtusa polaris Vitech Systems Cognizant (CTS) Speridian Technologies Ojas Innovative Technologies SWC Technology Partners Cricbuzz Jean Martin Capgemini Virtusa ECI Telecom Aptify Crossover ample softech basic   frequent|
|What are the different uses of Interfaces in Java ?|
|Why can't we have diamond problem with interfaces ?|
|What are Marker Interfaces ? Name few Java marker interfaces ?|
|Why do we need Thread class even in case we execute thread using runnable interface ?|
|Which of the following doesn't extend Collection interface ?|
|If an Abstract class has only abstract methods, What's the difference between such a class and an interface ?|
|What is an API ( Application Programming Interface ) ?|
|Can we declare interface methods as private ?|
|What is a nested interface ?|