Search Interview Questions |  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. |
|
|||
|
| ||||
| Interview Questions and Answers | ||||
| ||||
| Ans. Hadoop 1.x It supports only MapReduce (MR) processing model. It has limited scaling of nodes. Limited to 4000 nodes per cluster. It has single Namenode to manage the entire namespace. It has Single-Point-of-Failure (SPOF) Works on concepts of slots – slots can run either a Map task or a Reduce task MR has to do both processing and cluster resource management. Hadoop 2.x It supports MR as well as other distributed computing models like Spark, Hama, etc It has better scalability. Scalable up to 10000 nodes per cluster. Works on concepts of containers. Using containers can run generic tasks. It has Multiple Namenode servers manage multiple namespace. YARN does cluster resource management and processing is done using different processing models. | ||||
| Help us improve. Please let us know the company, where you were asked this question : | ||||
 Discuss Correct / Improve  | ||||
 Related Questions | ||||
 Difference between == and .equals() ? | ||||
| Why is String immutable in Java ? | ||||
| Explain the scenerios to choose between String , StringBuilder and StringBuffer ? or What is the difference between String , StringBuilder and StringBuffer ? | ||||
| What are the difference between composition and inheritance in Java? | ||||
| Explain OOPs or Explain OOPs Principles or Explain OOPs Concepts or Explain OOPs features or Tell me something about OOPs | ||||
| What is a Lambda Expression ? What's its use ? | ||||
| Why Char array is preferred over String for storing password? | ||||
| What are different ways to create String Object? Explain. | ||||
| Does garbage collection guarantee that a program will not run out of memory? | ||||
| What is the difference between final, finally and finalize() ? | ||||
