Best Bigdata Hadoop Developer Interview Guide For Everyone Prepared by Top Industry Experts

The market for ‘BigData’ is experiencing a tremendous growth, thereby creating a huge demand for skilled and trained BigData professionals across the globe. Though the demand is massive, the supply certainly seems to be falling short of the demand. The core reason might be the lack of proper homework before attending the interviews.

To make things smoother for you during the interview preparation process, we have listed top 50 commonly asked questions along with the best suited answers, which can help you to successfully crack the BigDataHadoop interview.

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Note: All the questions and answers are prepared by the subject experts who are associated with Kovid Academy.

1. What is Big-Data?

The term ‘Big-data’ is used to represent a collection of large and complex datasets, which are difficult to capture, store, process, share, analyze, and visualize using the traditional RDBMS tools.

2. Explain the five V’s of Big Data?

Big-Data is often described using the five V’s, which are:

Volume – the amounts of data generated every day, i.e. in Petabytes and Exabytes.

Velocity – the speed at which the data is generated every second. After the advent of social media, it probably takes seconds for any news to get viral across the Internet.

Variety – the different types of datagenerated every day that comes in a variety of formats like texts, audios, videos, csv, etc.

Veracity – the uncertainties or the messiness of thedata. With different forms of bigdata, it gets difficult to control the accuracy and quality. The volume often makes up the core reason behind the lack of accuracy and quality of thedata.

Value – having access to bigdata is always a good thing, but failing to extract the real value from it is completely useless. Extracting value means, drawing benefits to the organizations; achieving the return on investment (ROI); and making profits for the businesses working on big data.

3. On what concept the Hadoop framework works?

The Hadoop Framework works on:

Hadoop Distributed File System: HDFS is a Java-based storage unit in Hadoop, which offers reliable and scalable storage of large datasets. It is responsible for storing different types ofdata in the form of blocks.

Hadoop MapReduce: MapReduce is a Java-based programming paradigm that offers scalability across different Hadoop clusters. It is responsible for distributing the workload into different tasks to run in parallel. The job of ‘Map’ is to split the datasets into tuples or key-value pairs, and the ‘Reduce’ then takes the output from Map and combines it with datatuples into a smaller set of tuples.

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Hadoop YARN: Yet Another Resource Negotiator is the architectural framework in Hadoop that allows multiple data processing engines to handle storeddata in a single platform, disclosing a new completely method to analytics.

Note: Reduce jobs are performed only after the execution of Map jobs.

Tasty Benefits of Becoming a Personal Chef

When you’re looking for a new career, it’s important to consider the benefits. Becoming a personal chef is an excellent choice because there are many perks to this job. You will get plenty of time off and holidays, as well as free meals while on duty. However, before we get into all those benefits, let’s first discuss what exactly a personal chef is and how he or she can help people with their cooking needs.

A personal chef is someone who prepares dinner for clients. The dishes are then delivered to the client’s home or office, where they can enjoy a nice meal without having to cook it themselves. This makes life easier for people because instead of spending hours in the kitchen cooking meals, they get them served right on their doorstep. A personal chef doesn’t need to wear any fancy clothing like cook shirts or men’s and women’s chef shirts or coats, they can be comfortable while they cook, maybe in unisex shorts and a protective apron.

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Who is considered a good candidate for this job? Anyone with an interest in food and cooking will do well as a personal chef. Another important aspect that sets these professionals apart from others’ experiences working in professional kitchens; to be able to satisfy your customers’ demands you need plenty of practice first. A high school diploma may also be required by some employers so if you’re looking into this career path it would be best to get your qualifications sorted out prior to applying for jobs.

Benefits of becoming a personal chef:

You can work from home, so you don’t have to commute
Being a personal chef means you can work from home and not have to commute into the office. This is a great benefit for many people who live in busy cities or want more time to spend with their family.

One of the biggest drawbacks of becoming a chef is that they don’t have much time for a personal life or to socialize. However, as a personal chef, you can work from home and therefore have more time to spend with the family.

Another way in which it’s beneficial to become a personal chef is that you also get more free time for yourself, as well as having flexible working hours. If one works unsociable hours such as nights or weekends, one misses out on socializing with family and friends too, whereas being your own boss enables you to have a much better social life.

It’s a flexible job – you decide when and how much you want to work
The job role of a personal chef is a flexible one which means you can decide when and how much you want to work. This is a great benefit for those who have other commitments outside of their job. For example, if someone has children, they may not be able to take on full-time hours as this would mean that they need childcare or a nanny during the day which then costs extra money, so being a personal chef means you don’t have any additional cost since your hours are flexible.

You get to cook what you love (and your clients will be happy too)
For a chef, cooking is a passion; they love what they do. If you are someone who loves cooking then becoming a personal chef means that you get to cook for people who will really appreciate it and be happy with the quality of your food. There is also an opportunity here to develop new recipes which can then become part of your own style or signature dishes, which could lead to writing your own recipe books.

Many corporate clients like using their own chefs because it saves them time when organizing conferences etc. They don’t have to worry about getting catering in place as this has already been arranged by their employer so all they need to think about is enjoying themselves during the event.

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Personal chefs make more money than most other jobs in the food industry
The pay for a personal chef is far more than an average chef in a restaurant, however, this will depend on the size of your client and what they expect from their personal chef.

As well as doing one-off events, many personal chefs become part of an agency that provides them to different companies for anything up to six weeks at a time, perfect if you’re looking for more regular work. This is very rewarding because not only are you cooking tasty food but also providing great customer service throughout each contract which can lead to other opportunities such as catering to large parties or weddings. If it becomes successful enough, word spreads fast so there’s always another opportunity around the corner.

Becoming a personal chef can be rewarding both financially and personally which makes this career path very appealing indeed. In order for someone to become a successful personal Chef, they will first need lots of experience working within professional kitchens alongside some sort of formal training qualifications followed by some time to gain experience in the field to build their reputation. You can then go on to become a self-employed personal chef, work in restaurants or cafes as a cook or junior Chef or even progress onto Head Chef positions within high-end establishments.

Why Choose Contract Position Over Permanent Job?

People generally assume that a contract job is something that you take on only when you can’t find a full-time employment position. Well, maybe it was once upon a time but not anymore. Now, many people know the benefits of contract-basis jobs.

Before we go into detail about the benefits that a contract position has over a permanent one, let’s get to know more about both.

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Contract Job: A contract job is where you will have to work for a certain duration of time. The contract maybe for a few months or even a few years, depending on the hiring company’s requirement. For instance, an employee who has taken a contract job of 6 months will be working at the client’s office but will be paid by the employment contract. After the completion of the contract, the employee gets to decide what he wants to do for the remaining 6 months.

Permanent Job: A permanent job is your basic 9 to 5 job where you work for a particular company for as long as you want to. You will be paid on a monthly basis, or twice a month in some countries. You will be able to avail the various benefits offered by the company.

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Now, why would you choose a contract job over a permanent position?

Well, if you have a permanent job you will have to handle the same roles and responsibilities daily and sit on the same desk. With a contract job, you will be working on various projects for different companies in a year, depending on you. This will grant you the chance to utilize, develop, and expand your skill sets.
After getting into a contract basis job domain, you will get to work with different people, which will help in widening your network for future references. You could be lucky enough to even travel for the job.
Through many job portals such as contract-jobs.com, you will be able to work for some of the finest companies not only in India but also in the world. Plus, there are many government contract jobs to apply for. We all know it is difficult to get a government job. But, with contract jobs, as long as you have the skills, experience, and qualifications, you can get a government contract job.
In this concept of contract jobs, you get the freedom to be your own boss and work on your own terms. Once the project is handed over to you, you answer to yourself. You just have to execute it on time and do well.
On the Other Side with a permanent job, you get a few leaves in a month. But, with contract jobs, you get to work for a certain amount of time, let’s say 6 months, and have the remaining 6 months of the year to yourself once the contract is over, at your own expenses of course. You could travel, write a book or even take up another contract, it’s totally up to you.
Nowadays, due to the coronavirus pandemic, employers are more interested in hiring manpower on a contractual basis as it offers flexibility and cost-saving in manpower hiring. There are many contract jobs in the job market. This enhances the possibilities of you getting faster employment than that of a permanent job.
The more contracts you take up in a year, the more your earnings, and sometimes you get paid more than that of those in permanent positions. Plus, some companies offer amazing benefits for contractors to avail of.
Well. I hope the above-mentioned points entice you enough to go for contractual jobs rather than a permanent position if you seek a flexible lifestyle and want to work on your own terms.