Are legacy ITSM tools like BMC remedy weighing your IT team down? One of the top reasons why people choose us over BMC is the lightning speed at which you can learn and implement Freshservice. With Freshservice, you are truly in the future of IT service. With modules that are ITIL-aligned, a ton of features to collaborate and conquer, and industry’s best rated mobile app, Freshservice delivers effortless service that your users and agents will love.
If you’re one of the thousands stuck with legacy ITSM software and are looking for an alternative to BMC remedy, give Freshservice a spin. You will love it. A service desk at a fraction of the cost of BMC Get a fully functional and intuitive service desk at a fraction of the cost of BMC remedy. When you go with Freshservice, there’s no need for you to have needless expensive consulting and implementations. Freshservice is free for a team of 3 agents and starts at $20/month/agent.
Kingdom hearts re chain of memories. As your teams and company grow, our pricing plans keep up with your asks whilst staying affordable. Get to know what you’re gonna pay upfront and try Freshservice before you pay for it. It’s not without reason that we were awarded as leaders in the service desk category based on user satisfaction.
Q: Is Hadoop a database? Hadoop is a write-only file system.
But there are other products like Hive and HBase that provide a SQL-like interface to Hadoop for storing data in RDMB-like database structures. Q: What commands do you use to start Hadoop? A: start-dfs.sh and start-yarn.dfs Q: What does Apache Pig do? A: It is a way to write MapReduce jobs using a far simpler, SQL-like syntax than using Java, which is very wordy. Q: How do you copy a local file to the HDFS A: hadoop fs -put filename /(hadoop directory) Q: What is the Hadoop machine learning library called? A: Apache Mahout. Q: How is Spark different than Hadoop?
A: Spark stores data in memory, thus running MapReduce operations much faster than Hadoop, which stores that on disk. Also it has command line interfaces in Scala, Python, and R. And it includes a machine learning library, Spark ML, that is developed by the Spark project and not separately, like Mahout.
Q: Map is MapReduce? A: Map takes an input data file and reduces it to (key-value) pairs or tuples (a,b,c,d) or other iterable structure. Reduce then takes adjacent items and iterates over them to provide one final result. Q: What does safemode in Hadoop mean? A: It means the datanodes are not yet ready to receive data.
This usually occurs on startup. Q: How do you take Hadoop out of safemode?
A: hdfs dfsadmin -safemode leave Q: What is the difference between the a namenode and datanode? A: Hadoop is a master-slave model. The namenode is the master. The slaves are the datanodes. The namenode partitions MapReduce jobs and hands off each piece to different datanodes.
Datanodes are responsible for writing data to disk. Q: What role does Yarn play in Hadoop? A: It is a resource manager. What it does is keep track of available resources (memory, CPU, storage) across the cluster (meaning the machines where Hadoop is running). Then each application (e.g. Hadoop) asks the resource manager what resources are available and doles those out accordingly.
It runs two daemons to do this: Scheduler and ApplicationsManager. Q: How do you add a datanode? A: You copy the whole Hadoop $HADOOPHOME folder to a server. Then you set up ssh keys so that the Hadoop user can ssh to that server without having to enter a password. Then you add the name of that server to $HADOOPHOME/etc/hadoop/slaves.
That you run hadoop-daemon.sh -config $HADOOPCONFDIR -script hdfs start datanode on the new data node. Q: How do you see what Hadoop services are running? You should see: DataNode on the datanodes and NameNode, SecondaryNameNode, and ResourceManager on the NameNodes and (optionally) the JobHistoryServer. Q: How do you start the Hadoop Job History Server? A: $HADOOPHOME/sbin/mr-jobhistory-daemon.sh -config $HADOOPHOME/etc/hadoop start historyserver Q: What is linear regression?
A: This is a technique used to find a function that most nearly matches a set of data points. For example if you have one independent value x and one dependant variable y then linear regression will calculate the y = mx + b where m is the slope and b is the x intercept. This is used in predictive data models.
This is used to find a correlation between variables, for example whether studying more (x) increases student grades (y). Q: What do you think “Bring the computing to the data instead of bringing the data to the computing” means? A: This is the whole idea behind Hadoop. It means to use the computing power of commodity virtual machines to process pieces of a dataset instead of having one central powerful computer process that in one place. This model also lets Hadoop operate over datasets of almost unlimited size.
Q: What is Apache Cassandra? A: This is a noSQL column-oriented database that works in a ring topology. That means it has no central controlling server. It looks like a regular row-and-column RDBMS database, like MySQL, in that it supports a SQL-like syntax. But it groups data by columns for fast retrieval and writes and not rows. And when it writes an item it writes one row-column combination at a time. That means unlike RDBMS there can be rows that omit certain columns.
Q: What are the main Hadoop config files? A: hdfs-site and core-site.xml Q: How does Hadoop replication work? What does rack aware mean? A: The datanodes write data in data blocks, just like a regular disk drive would. It writes a copy of each block to other datanodes depending on the Replication Factor. To say that datanodes are rack aware means it does not write replicas all on the same rack in the data center where a power or other outage would result in the loss of the data and the back-up too. Q: What are some of the Hadoop CLI options?
A: The full list is: appendToFile cat checksum chgrp chmod chown copyFromLocal copyToLocal count cp createSnapshot deleteSnapshot df du dus expunge find get getfacl getfattr getmerge help ls lsr mkdir moveFromLocal moveToLocal mv put renameSnapshot rm rmdir rmr setfacl setfattr setrep stat tail test text touchz truncate usage Q: What file types can Hadoop use to store its data? A: Avro, Parquet, Sequence Files, and Plain Text Q: What is a NameSpace? A: It is an abstraction of a directory and file across the cluster. In other words /directory/file is a namespace that represents some file in some directory. But it is not local. It is on the Hadoop cluster, meaning it is stored across the data nodes.
Q: What does Apache Hive us a SQL server like Derby or mysql for? A: It stores the schema there while it stores the data in Hadoop.
Q: How can you call an external program from Hive, like a Python one: A: Use TRANSFORM like SELECT TRANSFORM (fields) USING 'python programName.py' as (fields) FROM table; Q: What is Apache Flume? A: It is a way to write streaming data to Hadoop.
Q: What is Hadoop High Availability? A: That means configuring a second namenode to work as a hot standby incase the primary namenode crashes. Q: What does the fsck command do? A: It checks for bad blocks (i.e., corrupt files) and problems with replication. Q: What kind of security does Hadoop have?
How can you add authentication? A: Hadoop by default only has file permissions security like a regular UNIX file system. You change permissions on that using chown and chmod and the regular Linx account or LDAP account. But if you want to have a higher level of authentication you would enable Kerberos, which is the authentication system used by Windows and optionally used by Linux. Then the datanodes would need to authenticate to connect to other nodes.
Are legacy ITSM tools like BMC remedy weighing your IT team down? One of the top reasons why people choose us over BMC is the lightning speed at which you can learn and implement Freshservice. With Freshservice, you are truly in the future of IT service. With modules that are ITIL-aligned, a ton of features to collaborate and conquer, and industry’s best rated mobile app, Freshservice delivers effortless service that your users and agents will love.
If you’re one of the thousands stuck with legacy ITSM software and are looking for an alternative to BMC remedy, give Freshservice a spin. You will love it. A service desk at a fraction of the cost of BMC Get a fully functional and intuitive service desk at a fraction of the cost of BMC remedy. When you go with Freshservice, there’s no need for you to have needless expensive consulting and implementations.
Freshservice is free for a team of 3 agents and starts at $20/month/agent. As your teams and company grow, our pricing plans keep up with your asks whilst staying affordable.
Get to know what you’re gonna pay upfront and try Freshservice before you pay for it. It’s not without reason that we were awarded as leaders in the service desk category based on user satisfaction.
A major part of getting your big data initiative up and running is finding personnel with the skills, experience, and personality you’ll need for project success. The dearth of big data and data science professionals can make the staffing requirements seem impossible at times.
This article will give some ideas of what to look for in big data candidates, where you can go to get in touch with these individuals, and the big data interview questions you’ll want to be sure to ask when trying to make your final decision. All of this has been broken down into four lists of three Three things to look for, three conferences to attend, three forums to comb, and three lists of big data interview questions and answers. 3 Things to Look for in a Big Data Candidate Well-rounded big data candidates need to do more than just demonstrate mastery in the big data and data science field.
To be successful, they should have the right type of attitude, outlook, and personality as well. Here are three characteristics to look for among your big data candidates. Drive – Success in big data and data science takes commitment, drive, and perseverance. Just having the skills may not be enough, candidates also need to be committed and dedicated to achieving results no matter what. One key identifier of (driven?) candidates with drive is self-training. Whether evidenced through online course participation or forum activity, it’s hard to go wrong with professionals who demonstrate the drive to teach themselves what they need to know for success. Personality – As any good HR Specialist will advise you, it’s important to hire people who are friendly and personable.
No one wants to work with an over-competitive, unapproachable jerk; No matter how smart they are. When hiring big data professionals, look for people who love their field so much that they are willing to share and give back on their own time. Forms of “giving back” might include open source contributions, forum participation or data volunteerism for social good.
Skills and Experience – It’s no news that there is an extreme shortage of professionals with experience and skills working in big data and data science. Even where experience may be lacking, if you can find big data candidates with prestigious training credential(s), you might want to give them a second look. Now that you know what to look for in big data candidates, it’s time to see some of the best places to meet these candidates, and some of the best big data interview questions you’ll want to be sure to ask. 3 Excellent Conferences When Scouting for Hires Data conferences are an excellent place to meet professionals with the skills and characteristics that you’re seeking. Think about attending any one of these three conferences, in order to network and recruit big data candidates:.
– This conference features the most cutting-edge business applications of big data and data science. No matter where in the world you’re based, Strata + Hadoop World has a conference located (relatively) nearby. IBM Datapalooza – Although IBM’s Datapalooza event is relatively new, you won’t find a better place to meet ambidextrous data engineers and data scientists to fill your real-time big data analytics requirements. – Last, but not least, there’s the Hadoop Summit. This is the conference to attend if you’re looking to connect with world class, big data developers. 3 Online Forums Where Developers Hangout Another great place to source talent is from among online forums.
At the following websites, you’re certain to see some of the expertise that you’re after. – HackerNews is brimming with Software Engineers and Developers who are all too excited to share what they know. It is a great place to look for experts that are curious about new positions, or to at least get some referrals for solid candidates that may be looking for a new opportunity.
Also, go ahead and check out HackerNews’. The people at the top of those lists are ones who really live for software development. Some of them may make excellent candidates for your position. – Another good place to look for big data professionals is Quora.
Go through relevant questions and look for people who are answering and sound like they really know what they are talking about. Once you’ve found these people, you can send them a message through the Quora platform and perhaps begin a conversation about your job opening. If you’re looking to hire a Big Data Developer, then the will be a good place to start.
If you are hiring a Data Scientist check out the. – The Kaggle Forum is another awesome resource if you’re looking to hire a Data Scientist or a Machine Learning Expert. 3 Thought-Provoking Lists of Big Data Interview Questions After networking at some of these conferences and combing through several of these forums, you’ve surely found some able candidates to interview. Now it’s time to prepare yourself for those interviews.
Although you may think you know exactly what to ask your big data candidates, it never hurts to get some outside perspective. The following websites are terrific sources for big data interview questions and answers. Edureka – Before interviewing a big data professional, look for ideas among these 50 interview questions and answers.
They range from general to very specific, so you’re certain to find something that’s relevant to every big data position. – DeZyre online training platform has recently published two impressive sets of interview questions and answers.
Senior Software Interview Questions
The first of these is the, which features 100 questions that are perfect to ask when you’re interviewing a Big Data Developer. Secondly, there are the. This set of 25 interview Q&A’s will come in handy if you’re interviewing a Big Data Developer to work with Apache Pig.
– If you’re interviewing for a Hadoop Developer position, this should be useful. Updated: 4/1/2017 Related posts:.
Wikibon: Automate your Big Data pipeline Learn how data management experts throughout the industry are transforming their Big Data infrastructure for maximum business impact. These postings are my own and do not necessarily represent BMC's position, strategies, or opinion. Share This Post. Lillian Pierson, P.E. Is a leading expert in the field of big data and data science.
She equips working professionals and students with the data skills they need to stay competitive in today's data driven economy. She is the author of three highly referenced technical books by Wiley & Sons Publishers: Data Science for Dummies (2015), Big Data / Hadoop for Dummies (Dell Special Edition, 2015), and Big Data Automation for Dummies (BMC Special Edition, 2016). Lillian has spent the last decade training and consulting for large technical organizations in the private sector, such as IBM, Dell, and Intel, as well as government organizations, from the U.S. Navy down to the local government level As the Founder of Data-Mania LLC, Lillian offers online and face-to-face training courses as well as workshops, and other educational materials in the area of big data, data science, and data analytics.
BMC Software interview questions and answers. 1.
Interview questions and answers – pdf file for free download Page 1 of 10 BMC Software interview questions and answers Related materials: - Interview questions - Interview tips - Job interview checklist - Interview thank you letters - Job records - Cover letter - Resume. Interview questions and answers – pdf file for free download Page 2 of 10 Why should we hire you? For one, the interview question: ―Give us reasons to hire you‖, ―why should we employ you‖ or ―what can you bring to our company‖ is something that differentiates the best candidates from the other good candidates. This question deals with your ability to sell yourself. Think of yourself as the product. Why should the customer buy?
Tips to answer:. One of the best ways to answer this question is to make a short list of all your advantages and create a paragraph that would point out the positive aspects that you would bring to the new job position.
One of the points that you can raise is the similarity of the job profile you are aiming for at the company to the job profile you enjoyed in your previous job. You can also draw the interviewer’s attention to your key skills and strengths, namely – quick learning, excellent communication skills, etc. In addition, your professional ambitions should be made clear – the motivation and dedication that you have for the profession and the opening position. Interview questions and answers – pdf file for free download Page 3 of 10 What do you know about BMC Software? Follow these three easy research tips before your next job interview: 1) Visit the company website; look in the ―about us‖ section and ―careers‖ sections 2) Visit the company’s LinkedIn page (note, you must have a LinkedIn account — its free to sign up) to view information about the company 3) Google a keyword search phrase like ―press releases‖ followed by the company name; you’ll find the most recent news stories shared by the company Remember, just because you have done your ―homework‖, it does not mean you need to share ALL of it during the interview!
Reciting every fact you’ve learned is almost as much of a turn off as not knowing anything at all! At a minimum, you should include the following in your answer: 1.
What type of product or service the company sells 2. How long the company has been in business 3. What the company culture is like OR what the company mission statement is, and how the culture and/or mission relate to your values or personality. Interview questions and answers – pdf file for free download Page 4 of 10 Why do you want to work with BMC Software? More likely than not, the interviewer wishes to see how much you know about the company culture, and whether you can identify with the organization’s values and vision. Every organization has its strong points, and these are the ones that you should highlight in your answer.
For example, if the company emphasizes on integrity with customers, then you mention that you would like to be in such a team because you yourself believe in integrity. It doesn’t have to be a lie. In the case that your values are not in line with the ones by the company, ask yourself if you would be happy working there.
If you have no issue with that, go ahead. But if you are aware of the company culture and realize that there is some dilemma you might be facing, you ought to think twice. The best policy is to be honest with yourself, and be honest with the interviewer with what is it in the company culture that motivates you. Interview questions and answers – pdf file for free download Page 5 of 10 Why should the BMC Software hire you? This is the part where you link your skills, experience, education and your personality to the job itself. This is why you need to be utterly familiar with the job description as well as the company culture.
Remember though, it’s best to back them up with actual examples of say, how you are a good team player. It is possible that you may not have as much skills, experience or qualifications as the other candidates. What then, will set you apart from the rest? Energy and passion might. People are attracted to someone who is charismatic, who show immense amount of energy when they talk, and who love what it is that they do.
As you explain your compatibility with the job and company, be sure to portray yourself as that motivated, confident and energetic person, ever- ready to commit to the cause of the company. Interview questions and answers – pdf file for free download Page 6 of 10 What can you do for BMC Software? ―What can you do for this company?‖ this question will be asked collect your knowledge of the company and competence as well.
Firstly you make sure that you have researched all information about the company before attending the interview and understand which tasks are waiting for you. You should offer examples to explain why your education, skills, and experience will be precious aspects for the employer. Also consider comparison in your goals to objectives of the company and hiring position. Remember to mention what achievement you have had in previous jobs. And you see yourself that the hiring position creates your special interest.
Interview questions and answers – pdf file for free download Page 7 of 10 What kind of salary do you need? A loaded question. A nasty little game that you will probably lose if you answer first.
So, do not answer it. Instead, say something like, That’s a tough question. Can you tell me the range for this position? In most cases, the interviewer, taken off guard, will tell you. If not, say that it can depend on the details of the job.
Then give a wide range. Interview questions and answers – pdf file for free download Page 8 of 10 Do you have any questions to ask us? Never ask Salary, perks, leave, place of posting, etc. Regarded questions. Try to ask more about the company to show how early you can make a contribution to your organization like ―Sir, with your kind permission I would like to know more about induction and developmental programs?‖ OR Sir, I would like to have my feedback, so that I can analyze and improve my strengths and rectify my shortcomings. Interview questions and answers – pdf file for free download Page 9 of 10 Materials for BMC Software interview: 440 behavioral interview questions Top 36 situational interview questions 95 management interview questions and answers 45 internship interview questions.
Interview questions and answers – pdf file for free download Page 10 of 10 Other job interview tips 1. Practice types of job interview such as screening interview, phone interview, second interview, situational interview, behavioral interview (competency based), technical interview, group interview 2.
Send interview thank you letter to employers after finishing the job interview: first interview, follow-up interview, final interview. If you want more interview questions for entry-level, internship, freshers, experienced candidates, you can ref free ebook: 75 interview questions and answers. Prepare list of questions in order to ask the employer during job interview. Job titles related: administrative/clerk and secretary positions, customer service positions, marketing & advertisng department, sales and account management positions, accounting/accounts receivable/accounts payable positions, 6. Note: This file is available for free download.