{"id":536,"date":"2018-05-04T12:43:19","date_gmt":"2018-05-04T12:43:19","guid":{"rendered":"https:\/\/www.gologica.com\/blog\/?p=536"},"modified":"2021-06-27T06:59:19","modified_gmt":"2021-06-27T06:59:19","slug":"apache-mahout-interview-questions-and-answers","status":"publish","type":"post","link":"https:\/\/www.gologica.com\/elearning\/apache-mahout-interview-questions-and-answers\/","title":{"rendered":"APACHE MAHOUT Interview Questions and Answers"},"content":{"rendered":"

What is Apache Mahout?<\/strong><\/p>\n

Apache driver could be a library of scalable machine-learning algorithms, enforced on high of Apache Hadoop and victimisation the MapReduce paradigm. Machine learning could be a discipline of AI centered on sanctionative machines to find out while not being expressly programmed, and it’s usually wont to improve future performance supported previous outcomes. <\/strong><\/p>\n

What will Apache driver do?<\/strong><\/p>\n

Mahout supports four main information science use cases:<\/p>\n

Collaborative filtering \u2013 mines user behaviour and makes product recommendations (e.g. Amazon recommendations)<\/p>\n

Clustering \u2013 takes things in a very explicit category (such as sites or newspaper articles) and organizes them into present teams, specified things happiness to a similar cluster square measure just like one another<\/p>\n

Classification \u2013 learns from existing categorizations so assigns unclassified things to the most effective class<\/p>\n

Frequent item-set mining \u2013 analyzes things in a very cluster (e.g. things in a very handcart or terms in a very question session) so identifies that things generally seem along<\/p>\n

\"Apache<\/a><\/p>\n

What will Apache driver do?<\/strong><\/p>\n

Mahout supports four main information science use cases:<\/p>\n

Collaborative filtering \u2013 mines user behaviour and makes product recommendations (e.g. Amazon recommendations)<\/p>\n

Clustering \u2013 takes things in a very explicit category (such as sites or newspaper articles) and organizes them into present teams, specified things happiness to a similar cluster square measure just like one another<\/p>\n

Classification \u2013 learns from existing categorizations so assigns unclassified things to the most effective class<\/p>\n

Frequent item-set mining \u2013 analyzes things in a very cluster (e.g. things in a very handcart or terms in a very question session) so identifies that things generally seem along<\/p>\n

What is the History of Apache Mahout? Once did it start?<\/strong><\/p>\n

The driver project was started by many folks concerned within the Apache Lucene (open supply search) community with a vigorous interest in machine learning and a want for strong, well-documented, scalable implementations of common machine-learning algorithms for bunch and categorization. The community was ab initio driven by nanogram et al.\u2019s paper \u201cMap-Reduce for Machine Learning on Multicore\u201d (see Resources) however has since evolved to hide abundant broader machine-learning approaches. Driver conjointly aims to:<\/p>\n

What square measure the options of Apache Mahout?<\/strong><\/p>\n

Although comparatively young in open supply terms, driver already encompasses a great deal of practicality, particularly in relevance bunch and CF. Mahout\u2019s primary options are:<\/p>\n

Taste CF. style is associate open supply project for CF started by Sean Owen on SourceForge and given to driver in 2008.<\/p>\n

Several Mapreduce enabled bunch implementations, as well as k-Means, fuzzy k-Means, Canopy, Dirichlet, and Mean-Shift.<\/p>\n

Distributed Naive Thomas {bayes|mathematician} and Complementary Naive Bayes classification implementations.<\/p>\n

How is it completely different from doing machine learning in R or SAS?<\/strong><\/p>\n

Unless you’re extremely skillful in Java, the writing itself could be a massive overhead. There\u2019s no method around it, if you don\u2019t are aware of it already {you square measure|you’re} planning to ought to learn Java and it\u2019s not a language that flows! For R users United Nations agency are wont to seeing their thoughts accomplished in real time the endless declaration and format of objects goes to look sort of a drag. For that reason i might advocate projected with R for any reasonably information exploration or prototyping and change to driver as you meet up with to production.<\/p>\n

What is the Roadmap for Apache driver version one.0?<\/strong><\/p>\n

The next major version, Mahout 1.0, can contain major changes to the underlying design of driver, including:<\/p>\n

Scala: additionally to Java, driver users are able to write jobs victimisation the Scala artificial language. Scala makes programming math-intensive applications abundant easier as compared to Java; therefore developers are far more effective.<\/p>\n

Spark & h2o: driver zero.9 associated below relied on MapReduce as an execution engine. With driver one.0, users will like better to run jobs either on Spark or liquid, leading to a big performance increase.<\/p>\n

\"Apache<\/a><\/p>\n

What is the distinction between Apache driver and Apache Spark\u2019s MLlib?<\/strong><\/p>\n

The main distinction can came from underlying frameworks. just {in case} of driver it’s Hadoop MapReduce and in case of MLib it’s Spark. To be additional specific \u2013 from the distinction in per job overhead<\/p>\n

If Your cc algorithmic rule mapped to solely|the one} mister job \u2013 main distinction are only startup overhead, that is dozens of seconds for Hadoop mister, and let say one second for Spark. therefore just in case of model coaching it’s not that necessary.<\/p>\n

Things are completely different if your algorithmic rule is mapped to several jobs. during this case we are going to have a similar distinction on overhead per iteration and it may be game changer.<\/p>\n

Let\u2019s assume that we’d like a hundred iterations, every required five seconds of cluster hardware.<\/p>\n

On Spark: it’ll take 100*5 + 100*1 seconds = 600 seconds.<\/p>\n\n\n\n
\n
Are you Looking for Apache Mahout online Training? Please Enroll for Demo Apache Mahout..! <\/a><\/strong><\/h5>\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Mention some machine learning algorithms exposed by Mahout?<\/strong><\/p>\n

Collaborative Filtering<\/p>\n

Item-based cooperative Filtering<\/p>\n

Matrix factorisation with alternating method of least squares<\/p>\n

Matrix factorisation with alternating method of least squares on Implicit Feedback<\/p>\n

Classification<\/p>\n

Naive Thomas Bayes<\/p>\n

Complementary Naive Thomas Bayes<\/p>\n

Random Forest<\/p>\n

Clustering<\/p>\n

Canopy bunch<\/p>\n

k-Means bunch<\/p>\n

Fuzzy k-Means<\/p>\n

Streaming k-Means<\/p>\n

Spectral bunch<\/p>\n","protected":false},"excerpt":{"rendered":"

What is Apache Mahout? 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