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Preparing for Hadoop Interview? Here are a Few Predictable Questions

 

Big Data has been attested as one of the fastest growing technologies of this decade and thus potent enough to produce a large number of jobs. While enterprises across industrial stretch have started building teams, Hadoop technical interview questions could vary from simple definitions to critical case studies. Let’s take a quick glimpse of the most obvious ones.

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#1 – What is Big Data?

Big Data refers to such gigantic set of data that has massive potential for mining but cannot be processed as such with traditional tools. However, any data cannot be classified as Big Data; only the set that has high volume, veracity and velocity can be qualified as such. In order to draw meaning from such data, we need to utilize tools such as Hadoop. For that to happen, one needs to undergo a relevant Training in Hadoop or any related software tool.

#2 – What do the four V’s of Big Data denote?

A fitting definition has been put forward by IBM:

  1. Volume: Huge amount of data
  2. Variety: A large variety of data
  3. Veracity: Data that has inherent uncertainty
  4. Velocity: Analysis of streaming data

#3 – How Big Data analysis helps businesses in increasing their revenue?

There are a lot of ways in which businesses can use Big Data analytics to their advantage. For instance, Wal-Mart, the biggest retailer in the world, uses predictive analytics for launching new products on the basis of customer needs and preferences. The who’s who of global businesses – Facebook, LinkedIn, Twitter, Bank of America, and JP Morgan Chase and much more – use the same for boosting their revenue. Businesses and professionals interested in the utilization of the same can choose to learn Hadoop – the most popular tools in this regard.

#4 – Name some companies that use Hadoop?

  • Yahoo (the top contributor with more than 80 percent of its code)
  • Netflix
  • Amazon
  • Hulu
  • Spotify
  • Twitter
  • Amazon

 

#5 – What is structured and unstructured data?

Structured data refers to such data that can be stored in traditional database systems in the form of columns and rows. On the other hand, unstructured data refers to data that can be stored only partially in traditional database systems.

#6 – On what concept the Hadoop framework works?

HDFS: Hadoop Distributed File System: This is a Java-based file system for reliable storage of large datasets

Hadoop MapReduce: This is Hadoop framework programming paradigm based on Java which provides scalability across various Hadoop clusters.

#7 – List the core components of Hadoop application

  • Hadoop Common
  • HDFS
  • Hadoop MapReduce
  • YARN
  • Data Storage – Pig and Hive
  • Data serialization components: Thrift and Avro

#8 – What is the best Hardware configuration to run Hadoop?

Dual core processor with 4GB or 8GB RAM, with ECC Memory. ECC memory is recommended as non-ECC memory is normally associated with configuration checksum errors.

#9 – What are various common input formats?

  • Text input format – default input format
  • Sequence file format
  • Key value input format

One can develop a deep understanding of key Big Data concepts by opting for Training in Hadoop

#10 – Name some Hadoop tools that are required for working on Big Data.

Some such tools include Hive, HBase and Ambari and much more. Interested individuals should choose to learn Hadoop to get more information on the same.

These were some of the most common yet important Hadoop technical interview questions. A high-level understanding of a few real time case studies could help you sail through.

 For BIG DATA HADOOP Training needs, Visit http://www.zarantech.com/course-list/hadoop/.  Call  515-309-7846 or email  info@zarantech.com.

Steering the Business Analysis advantages in an Agile Background

It took a while for the project processes to synchronise entirely with agile methods. After increased acceptance across areas, Business Analysis is being tried and tested in an agile environment. The results so far are encouraging and confirm that the businesses have positioned themselves higher.

Who shall challenge ‘value to customer’? What issues are being addressed and why a particular piece of software is being developed as the core solution? Business Analysis answers all! Thus, calls for learning the agile impact while pursuing a course in Business Analysis.

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Cross-functional Teams and Business Analysis

Agile environment happens to encourage cross-functional teams. In such a scenario, one is bound to doubt that if a Business Analyst is actually needed? A Business Analyst is deployed centrally and performs integrated communications amongst all. He has a high-level view of all teams, tasks assigned to them and the progress of each.

Thus a business analysis is imperative for every enterprise looking forward to expanding its customer base and exploring new avenues of success.

Know More about Business Analysis with Free  BA Live Webinar Now !

Changes in Business Analysis as agile gets adopted across the board

An important change that agile methodology has brought about in the functioning of businesses is that it has resulted in greater collaboration between teams. Behavior Driven Development (BDD) is shaping up how businesses lay out their acceptance criteria. It makes the complex functionality of any given software more understandable for any individual of non-technical background.

A business analyst can contribute in more than one ways for the advancement of a business. Why couldn’t a business analyst play the role of a tester, where he or she would work on ensuring that the development team has worked well on completing all the requirements of the end customer! In addition, even the former could play the role of a proxy product owner to work out the modalities of signing off! The phrase that ‘that’s not my job’ has become too outdated in this age and one has to wear many hats at a single time.

Business Analysis by an agile team in the absence of a specialist

That would be indeed a cracking idea! Teams can come up with exciting ideas and there is hardly anything that stops them from making stupendous progress. However, there is a note of caution – absence of the same cannot be an excuse for letting things slip and cause an embarrassment later on. For instance, you may end up missing on important details that can lead to less than satisfactory understanding of complex business processes, thereby leading to incorrect development later on. It might seem tempting for developers to interview the clients themselves, but this approach can have deep pitfalls for the reasons specified above. Way forward for agile teams with respect to business analysis practices

  • The product owner should be included in the overall development process. There ought to be a detailed conversation among developers, testers and the product owner regarding the end product that you wish to develop.
  • Story kick-offs can work wonders when it comes to an understanding of requirements and the implementation of the same.
  • Collaborative designing by involving the whole team can be another cool idea. There are a number of options in this regard, including drawing wireframes of one’s understanding of a problem, brainstorming and finally, converging on a final design.

Clarifying several complexities such as business processes, industry standards, company policies, complex changes in government regulations and much more. Business Analysis ensures dynamic changes around. There is a pressing need for not forgetting the areas that demand consideration.

All geared up for a training course in Business Analysis? Stay updated for more insights.

Checkout our detailed Course Content for Business Analysis

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Roles and Responsibilities of Business Analyst

Attend a Live WEBINAR about Hadoop Admin Training on May 11, 2016 @8:00 p.m. CST

Hadoop Apdmin Training

Time : Wednesday May 11, 2016 @ 8:00 p.m. CST

You are most welcome to join our Upcoming batch, details of the same is as follows:

Attend a Live Demo Session : Sign up for Hadoop Admin Webinar
Batch Start Date : May 18, 2016 @ 08:00 p.m. CST
For More Information http://goo.gl/lBjw99
Class Schedule Mon-Thu 08:00 p.m. CST 3 hrs each session

Contact : Ilyas @ 515-978-9788 , Email : ilyas@zarantech.com

Demo Video by Trainer Ravi

Attend a Free Live WEBINAR about Hadoop Admin Training on May 11, 2016 @8:00 p.m. CST. Register Link  – http://goo.gl/BYufNJ

 

Attend a Live WEBINAR about Hadoop Admin Training on Apr 26, 2016 @7:30 p.m. CST

Hadoop Apdmin Training

Time : Tuesday Apr 26, 2016 @ 7:30 p.m. CST

You are most welcome to join our Upcoming batch, details of the same is as follows:

Attend a Live Demo Session : Sign up for Hadoop Admin Webinar
Batch Start Date : Apr 29, 2016 @ 07:30 p.m. CST
For More Information http://goo.gl/lBjw99
Class Schedule Mon-Thu 10:00 am CST 3 hrs each session

Contact : Ilyas @ 515-978-9788 , Email : ilyas@zarantech.com

Demo Video by Trainer Ravi

Attend a Free Live WEBINAR about Hadoop Admin Training on April 26, 2016 @7:30 p.m. CST. Register Link  – http://goo.gl/BYufNJ

 

A path to well paid and dynamic IT career with mastering Java

Java and the factors that make it the most popular computer programming language

java

With the passage of every day, some new and unique computer programming language is introduced to the market. However, if you do a head to head comparison between the popular computer programming languages, the slot for the most popular choice would go to that of Java. This is an advanced programming language in the categories of C & C++. Continue reading A path to well paid and dynamic IT career with mastering Java

How m-learning is different from e-learning?

Source: www.commlabindia.com

A decade ago, educators considered all smart phones and tablets are deplorable distraction in class room. Now-a-days, rather than snatching those devices away, all tech-savvy teachers trying to engage students by incorporating learning methods. Even though, smartphones, tablets, and other computing devices are used in universal implementation, these devices are also used as learning tool by exploring emerging technologies.

In education technology revolution, e-learning and m-learning are the two important buzz words which characterizes the tech-savvy teacher’s whole raft of idea and resources. But the two terms are always used with some confusion about the differences between the two modes of training.

Many people assume that e-learning and m-learning are same. However, designing effective courses for these two modes can differ in many aspects.

Before we get to know the difference between e-learning and m-learning, we shall see the definition of each of these.

E-learning

E-learning refers to electronically supported learning methodology in which digital communication, internet or the electronic devices are used to support the process of learning. This method includes Computer Based Training (CBT) and Web Based Training (WBT).

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Source: global.acs.org

M-learning

M-learning refers to electronically supported learning using portable devices which allows student to learn in different environments at any flexible time. This mode of learning is a subset of e-learning which is growing rapidly in the past few years.

This is also considered as the extension of e-learning but the quality online training will be provided by delivering the course with awareness of the limitations and the benefits of the portable devices used.

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Source: http://www.gadgetsandtech.net/

Now, let us see the difference between e-learning and m-learning:

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As you read these differences, you may start to wonder which mode of learning and Learning Management System (LMS) is better than the other. Fortunately, both the modes of learning are the effective and powerful modes for training people.

For Online IT Training needs, visit: http://www.zarantech.com/. Call  515-309-7846 or email: info@zarantech.com

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Attend a Live WEBINAR about SAP HANA 1.0 Training on 30-September-2015 @7:30 PM CST ‪#‎ZaranTech

SAP-HANA

Time : Wednesday September 30th , 2015 @ 7:30 pm CST

You are most welcome to join our Upcoming batch, details of the same is as follows:

Attend a Live Demo Session : Click here to Register
Batch Start Date : 03rd September, 2015 @ 7:30 pm CST
For More Information
http://goo.gl/k7BZT
Class Schedule : Sat-Sun 8:00 AM CST 3 hrs each session

Contact : Dinesh @ 515-309-1546 , Email : dinesh@zarantech.com

Demo by Trainer Eliaz

Attend a Free Live WEBINAR about SAP HANA 1.0 Training on 30-September-15 @7:30 PM CST. Register Link  – https://goo.gl/7vCMDy

 

Attend a Live WEBINAR about SAP HANA 1.0 Training on 24-September-2015 @7:30 PM CST ‪#‎ZaranTech

SAP-HANA

Time : Thursady September 24th , 2015 @ 7:30 pm CST

You are most welcome to join our Upcoming batch, details of the same is as follows:

Demo Date : 24th September Thur @ 7:30 PM CST
Class Schedule 26th September Sat & Sun at 8:00 AM CST 
Attend a Live Demo Session Click here to Register

Contact : Dinesh @ 515-309-1546 , Email : dinesh@zarantech.com

Demo by Trainer Eliaz

Attend a Free Live WEBINAR about SAP HANA 1.0 Training on 24-September-15 @7:30 PM CST. Register Link  – https://goo.gl/7vCMDy

 

Top tips for Work Life balance

Top-tips-for-Work-Life-balanceAccomplishing work-life equalization is a tightrope walking. Incline too far restricted and you’ll lose your steadiness and topple. Regulating a worldwide organization for various decades I’ve seen this happen over a long period of time, yet fortunately I have taken in various tips along the path on the best way to discover balance. Here are my main five tips for work-life equalization.

Continue reading Top tips for Work Life balance

Business Analyst Trends for 2015

Business-Analyst-Trends-for-2015In view of our anticipated patterns, 2015 appears to be a year of critical change, and business investigators are on the cutting edge of progress. A few noteworthy commercial enterprises, and the numerous associations inside of them, are currently move so it ought to be nothing unexpected that the significance of the business examiner just increments as business sectors movement and associations are compelled to manage the quickening pace and unpredictability of business.

Continue reading Business Analyst Trends for 2015