Technical Interview Questions
There are many ways to debug Hadoop codes but the most popular methods are: By using Counters. By web interface provided by the Hadoop framework. Debugging Hadoop code can be a complex process, but here are some general steps and techniques you can use: Logging: Hadoop applications typically use log files extensively. Ensure that your … Read more
If you have a background in any programming language like C, C++, PHP, Python, Java, etc. It may be really helpful, but if you are nil in java, it is necessary to learn Java and also get the basic knowledge of SQL. While it’s not strictly necessary to know Java to learn Hadoop, having a … Read more
Storage node: Storage Node is the machine or computer where your file system resides to store the processing data. Compute Node: Compute Node is a machine or computer where your actual business logic will be executed. In Hadoop, storage and compute nodes play distinct roles in a distributed computing environment. Storage Node: A storage node … Read more
Following are the network requirement for using Hadoop: Password-less SSH connection. Secure Shell (SSH) for launching server processes Hadoop, being a distributed computing framework, has specific network requirements to ensure efficient communication and data transfer among nodes in a cluster. Here are some key network requirements for using Hadoop: Low Latency: Hadoop benefits from low-latency … Read more
Following are the three configuration files in Hadoop: core-site.xml mapred-site.xml hdfs-site.xml Hadoop typically uses three main configuration files: core-site.xml: This file contains configuration settings for Hadoop Core, such as the default file system (fs.defaultFS) and Hadoop runtime environment parameters. hdfs-site.xml: This file contains configuration settings for the Hadoop Distributed File System (HDFS), including block size, … Read more