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Top 20 teradata interview questions and answers pdf ebook free download

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You'll likely be asked difficult questions during the interview. Preparing the list of likely questions in advance will help you easily transition from question to question.

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Top 20 teradata interview questions and answers pdf ebook free download

  1. 1. Interview questions and answers – free pdf download Page 1 of 39 Top 20 teradata interview questions and answers
  2. 2. Interview questions and answers – free pdf download Page 2 of 39
  3. 3. Interview questions and answers – free pdf download Page 3 of 39 Job interview checklist: - Pick out proper clothes. - Research the company. - Speak to past and present employees. - Run through questions you may be asked. - Practice with a friend or family member.
  4. 4. Interview questions and answers – free pdf download Page 4 of 39 TOP JOB INTERVIEW MATERIALS • http://jobinterview247.com/free-ebook-145-interview- questions-and-answers • http://jobinterview247.com/free-ebook-top-22-secrets-to- win-every-job-interviews • Top 7 job search, resume writing, job interview materials: http://interviewquestions68.blogspot.com/2017/02/top-7-job- interview-materials.html
  5. 5. Interview questions and answers – free pdf download Page 5 of 39 Tell me about yourself? This is probably the most asked question in teradata interview. It breaks the ice and gets you to talk about something you should be fairly comfortable with. Have something prepared that doesn't sound rehearsed. It's not about you telling your life story and quite frankly, the interviewer just isn't interested. Unless asked to do so, stick to your education, career and current situation. Work through it chronologically from the furthest back to the present.
  6. 6. Interview questions and answers – free pdf download Page 6 of 39 What is the meaning of skewness in teradata? When do we use nullif function in teradata? When we choose wrong primary index the data unevenly distributed across all the amps means some amps have more records and some amps had less records this is called skewness. Percentage of skewness is called skew factor.30% skew factor is acceptable.
  7. 7. Interview questions and answers – free pdf download Page 7 of 39 What Can You Do for Us That Other Candidates Can't? What makes you unique? This will take an assessment of your experiences, skills and traits. Summarize concisely: "I have a unique combination of strong technical skills, and the ability to build strong customer relationships. This allows me to use my knowledge and break down information to be more user-friendly."
  8. 8. Interview questions and answers – free pdf download Page 8 of 39 What is fsldm in teradata ? FSLDM - Financial Services Logical Data Model (Teradata FS-LDM 7.0) its developed by Teradata for the financial sectors (Specifically for Bank). it can be customized based on the user requirement.
  9. 9. Interview questions and answers – free pdf download Page 9 of 39 Can we load a Multi set table using MLOAD? We can Load SET, MULTISET tables using Mload, But here when loading into MULTISET table using MLOAD duplicate rows will not be rejected, we have to take care of them before loading.But in case of Fload when we are loading into MULTISET duplicate rows are automatically rejected, FLOAD will not load duplicate rows weather table is SET or MULTISET
  10. 10. Interview questions and answers – free pdf download Page 10 of 39 What is use of compress in teradata?Explain? Compression is used to Minimize the table size, for example when the table size is increasing anonymously We can use Compression to reduce the size of the table Conditions:1.Compression can be declared at the time of table creation2.We can compress up to 256 column values(not columns) 3.We can’t compress variable length fields (vartext,varchar..)
  11. 11. Interview questions and answers – free pdf download Page 11 of 39 Explain about Skew Factor? The data distribution of table among AMPs is called Skew Factor . Generally For Non-Unique PI we get duplicate values so the more duplicate vales we get more the data have same row hash so all the same data will come to same amp, it makes data distribution inequality,One amp will store more data and other amp stores less amount of data, when we are accessing full table, The amp which is having more data will take longer time and makes other amps waiting which leads processing wastage In this si ....
  12. 12. Interview questions and answers – free pdf download Page 12 of 39 What is the difference between start schema and Fsldm? FSLDM --> Financial Services Logical Data Model (Teradata FS-LDM 7.0) its developed by Teradata for the financial sectors (Specifically for Bank). it can be customised based on the user requirement. StarSchema --> Its a relational database schema for representing multidimensional data. The data is stored in a central fact table, with one or more tables holding information on each dimension.
  13. 13. Interview questions and answers – free pdf download Page 13 of 39 What is an optimization and performance tuning and how does it really work in practical projects? Performance tuning and optimization of a query involves collecting statistics on join columns, avoiding cross product join, selection of appropriate primary index (to avoid skewness in storage) and using secondary index. Avoiding NUSI is advisable.
  14. 14. Interview questions and answers – free pdf download Page 14 of 39 What is the difference between Global temporary tables and Volatile temporary tables? Global Temporary tables (GTT) – 1. When they are created, its definition goes into Data Dictionary. 2. When materialized data goes in temp space. 3. That’s why, data is active upto the session ends, and definition will remain there up-to its not dropped using Drop table statement.If dropped from some other session then its should be Drop table all; 4. you can collect stats on GTT.
  15. 15. Interview questions and answers – free pdf download Page 15 of 39 Volatile Temporary tables (VTT) - 1. Table Definition is stored in System cache< ....
  16. 16. Interview questions and answers – free pdf download Page 16 of 39 How does indexing improve query performance? Indexing is a way to physically reorganize the records to enable some frequently used queries to run faster. The index can be used as a pointer to the large table. It helps to locate the required row quickly and then return it back to the user. or The frequently used queries need not hit a large table for data. they can get what they want from the index itself. - cover queries. Index comes with the overhead of maintenance. Teradata maintains its index by itself. Each time an insert/u ....
  17. 17. Interview questions and answers – free pdf download Page 17 of 39 How Teradata makes sure that there are no duplicate rows being inserted when its a SET table? Teradata will redirect the new inserted row as per its PI to the target AMP (on the basis of its row hash value), and if it find same row hash value in that AMP (hash synonyms) then it start comparing the whole row, and find out if duplicate. If it’s a duplicate it silently skips it without throwing any error.
  18. 18. Interview questions and answers – free pdf download Page 18 of 39 What is the difference between Sub-Query & Co-Related Sub-Query? When queries are written in a nested manner then it is termed as a sub-query. A Sub-Query get executed once for the parent statement whereas Co-Related Sub- Query get executed once for each row of the parent query. Select Empname, Deptno, Salary from Employee Emp where Salary = (Select Max(Salary) from Employee where Deptno = Emp.Deptno) order by Deptno
  19. 19. Interview questions and answers – free pdf download Page 19 of 39 What is the difference between Access Logging and Query Logging in Teradata? 1. Access Logging is concerned with security (i.e. who’s is doing what). In access logging you ask the database to log who’s doing what on a given object. The information stored is based on the object not the SQL fired or the user who fired it. 2. Query Logging (DBQL) is used for debugging (i.e. what’s happening around ?). Incase of DBQL database keep on tracking various parameters i.e. the SQLs, Resource, Spool Usage, Steps and other things which help you understand what’s going on, the in ....
  20. 20. Interview questions and answers – free pdf download Page 20 of 39 Explain TPUMP (Teradata Parallel Data Pump) Utility in Teradata? TPUMP allows near real time updates from Transactional Systems into the Data Warehouse. * It can perform Insert, Update and Delete operations or a combination from the same source. * It can be used as an alternative to MLOAD for low volume batch maintenance of large databases. * TPUMP allows target tables to have Secondary Indexes, Join Indexes, Hash Indexes,
  21. 21. Interview questions and answers – free pdf download Page 21 of 39 Referential Integrity, Populated or Empty Table, Multiset or Set Table or Triggers defined on the Tables. * TPUMP can h ....
  22. 22. Interview questions and answers – free pdf download Page 22 of 39 Commands used within Ferret Utility? 1. SHOWSPACE – Well this command reports you the amount of Disk Cylinder Space is in use and the amount of Disk Cylinder Space is available in the system. This will give you an information about Permanent Space cylinders, Spool Space cylinders, Temporary Space cylinders, Journaling cylinders, Bad cylinders and Free cylinders. For each of these 5 things it will present you 3 parameters i.e. Average Utilization per cylinder, % of total avaliable cylinders and number of cylinders. 2. SHOWBLOCK ....
  23. 23. Interview questions and answers – free pdf download Page 23 of 39 Explain Ferret Utility in Teradata? Ferret (File Reconfiguration tool) is an utility which is used to display and set Disk Space Utilization parameters within Teradata RDBMS. When you select the Ferret Utility parameters, it dynamically reconfigures the data on disks. We can run this utility through Teradata Manager; to start the Ferret Utility type (START FERRET) in the database window.
  24. 24. Interview questions and answers – free pdf download Page 24 of 39 What is TENACITY? What is its default value? TENACITY specifies the amount of time in hours, to retry to obtain a loader slot or to establish all requested sessions to logon. The default for Fast Load is “no tenacity”, meaning that it will not retry at all. If several FastLoad jobs are executed at the same time, we recommend setting the TENACITY to 4, meaning that the system will continue trying to logon for the number of sessions requested for up to four hours.
  25. 25. Interview questions and answers – free pdf download Page 25 of 39 What does SLEEP function does in Fast load? The SLEEP command specifies the amount minutes to wait before retrying to logon and establish all sessions. Sleep command can be used with all load utilities not only fastload. This situation can occur if all of the loader slots are used or if the number of requested sessions is not available. The default value is 6 minutes. If tenacity was set to 2 hours and sleep 10 minutes, Sleep command will try to logon for every 10 minutes up to 2 hours duration.
  26. 26. Interview questions and answers – free pdf download Page 26 of 39 What is multi Insert? Inserting data records into the table using multiple insert statements. Putting a Semi colon in front of the key word INSERT in the next statement rather than Terminating the first statement with a semi colon achieves it. Insert into Sales “select * from customer” ; Insert into Loan “select * from customer”;
  27. 27. Interview questions and answers – free pdf download Page 27 of 39 Top 6 tips for job interview
  28. 28. Interview questions and answers – free pdf download Page 28 of 39 Tip 1: Do your homework You'll likely be asked difficult questions during the interview. Preparing the list of likely questions in advance will help you easily transition from question to question. Spend time researching the company. Look at its site to understand its mission statement, product offerings, and management team. A few hours spent researching before your interview can impress the hiring manager greatly. Read the company's annual report (often posted on the site), review the employee's LinkedIn profiles, and search the company on Google News, to see if they've been mentioned in the media lately. The more you know about a company, the more you'll know how you'll fit in to it.
  29. 29. Interview questions and answers – free pdf download Page 29 of 39 Ref material: jobguide247.info/job-interview-checklist-40-points Tip 2: First impressions When meeting someone for the first time, we instantaneously make our minds about various aspects of their personality. Prepare and plan that first impression long before you walk in the door. Continue that excellent impression in the days following, and that job could be yours. Therefore: • Never arrive late.
  30. 30. Interview questions and answers – free pdf download Page 30 of 39 • Use positive body language and turn on your charm right from the start. • Switch off your mobile before you step into the room. • Look fabulous; dress sharp and make sure you look your best. • Start the interview with a handshake; give a nice firm press and then some up and down movement. • Determine to establish a rapport with the interviewer right from the start. • Always let the interviewer finish speaking before giving your response. • Express yourself fluently with clarity and precision. Useful material: jobguide247.info/top-10-elements-to-make-a- good-first-impression-at-a-job-interview
  31. 31. Interview questions and answers – free pdf download Page 31 of 39 Tip 3: The “Hidden” Job Market Many of us don’t recognize that hidden job market is a huge one and accounts for 2/3 of total job demand from enterprises. This means that if you know how to exploit a hidden job market, you can increase your chance of getting the job up to 300%. In this section, the author shares his experience and useful tips to exploit hidden job market. Here are some sources to get penetrating into a hidden job market: Friends; Family; Ex-coworkers; Referral; HR communities; Field
  32. 32. Interview questions and answers – free pdf download Page 32 of 39 communities; Social networks such as Facebook, Twitter…; Last recruitment ads from recruiters; HR emails of potential recruiters… Tip 4: Do-It-Yourself Interviewing Practice There are a number of ways to prepare for an interview at home without the help of a professional career counselor or coach or a fee-based service. You can practice interviews all by yourself or recruit friends and family to assist you.
  33. 33. Interview questions and answers – free pdf download Page 33 of 39 Useful material: jobguide247.info/free-ebook-75-interview- questions-and-answers Tip 5: Ask questions Do not leave the interview without ensuring that you know all that you want to know about the position. Once the interview is over, your chance to have important questions answered has ended. Asking questions also can show that you are interested in the job. Be specific with your questions. Ask about the company and the industry. Avoid asking personal questions of the interviewer and avoid asking questions pertaining to politics, religion and the like.
  34. 34. Interview questions and answers – free pdf download Page 34 of 39 Ref material: jobguide247.info/25-questions-to-ask-employers- during-your-job-interview Tip 6: Follow up and send a thank-you note Following up after an interview can help you make a lasting impression and set you apart from the crowd. Philip Farina, CPP, a security career expert at Manta Security Management Recruiters, says: "Send both an email as well as a hard-copy thank-you note, expressing excitement, qualifications and further interest in the position. Invite the hiring manager to
  35. 35. Interview questions and answers – free pdf download Page 35 of 39 contact you for additional information. This is also an excellent time to send a strategic follow-up letter of interest." Ref material: jobguide247.info/top-8-interview-thank-you-letter- samples Other materials from jobguide247.info • top 36 situational interview questions • 440 behavioral interview questions ebook pdf download • top 40 second interview questions • 136 management interview questions and answers ebook pdf download • top 30 phone interview questions
  36. 36. Interview questions and answers – free pdf download Page 36 of 39 • 290 competency based interview questions • 45 internship interview questions • 15 tips for job interview attire (dress code, clothes, what to wear) • top 15 written test examples • top 15 closing statements • 20 case study examples for job interview • top 25 scenarios interview questions • top 25 tips for interview preparation • top 10 tips to answer biggest weakness and strengths questions • tips to answer question tell me about yourself • 16 job application tips
  37. 37. Interview questions and answers – free pdf download Page 37 of 39 • top 14 job interview advices • top 18 best interview practices • 25 career goals examples • top 36 technical interview questions • 18 job interview exam samples • Q A 25 questions with answers • 12 followup email thank you letter samples • 15 tips for job interview withour no experience • 15 presentation ideas for job interview • 12 job interview role play examples • 10 job interview techniques • 11 job interview skills
  38. 38. Interview questions and answers – free pdf download Page 38 of 39 • tips to answer question why should I hire you • 25 interview questions to ask employer • 25 job interview assessment test examples • 15 tips to answer experience questions • 12 tips to answer education knowledge questions • 15 screening interview questions • 22 group interview questions • 22 panel interview questions • 22 case interview questions • top 12 tips for career development • top 9 career path tips • top 14 career objectives
  39. 39. Interview questions and answers – free pdf download Page 39 of 39 • top 12 career promotion tips • 11 performance appraisal methods (includes appraisal templates and forms) • top 28 performance appraisal forms • top 12 salary negotiation tips • top 9 tips to get high salary

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