Candidate Key:-This key does not have any repeated attribute Foreign Key:-This key a column in the table to create a relationship with another table. This particular RDBMS Question explains the importance of key
As basic as this question is, have a clear and concise answer that demonstrates your understanding of this term and its full scope, making it clear that big data includes just about any type of data from any number of sources, including the following: Emails. Server logs. Social media. Use...
4. How to know if a data model is performing well or not? This question is subjective, but certain simple assessment points can be used to assess the accuracy of a data model. They are as follows: A well-designed model should offer good predictability. This correlates to the ability to ...
1. Locks the database, blocking all transactions 2. Places a mark in the transaction log 3. Releases the database lock 4. Extracts all pages in the data fi les and writes them to the backup device 5. Locks the database, blocking all transactions ...
View salaries based on location, company, and seniority. Job Board Find your next dream job on our data science job board. Question Bank Access 500+ interview questions with solutions we have in our database, including real take-home exercises companies use in interviews. ...
Note:This question is commonly asked in a big data interview.You can go further to answer this question and try to explain the main components of Hadoop. 4. How is big data analysis helpful in increasing business revenue? Answer:Big data analysis has become very important for the businesses....
35Q) Where could you look if you had a question about whether a column has been defined as an index? Ans:This information can be found in SYSIBM.SYSINDEXES. 36Q) What is the SQL Communications Area and what are some of its key fields?
These layers help display data in a different manner. 33. Why is warehousing important? The data warehousing process is based on the relational database management system. It lets the user source data from various sources, manage and organize it to create useful insights. It is an important ...
While we believe that this content benefits our community, we have not yet thoroughly reviewed it. If you have any suggestions for improvements, please let us know by clicking the “report an issue“ button at the bottom of the tutorial. Ask a questionSearch for more help...
Focus on whatever constitutes success in your field, and you’ll be fine! Read more: What Motivates You? Sample Interview Question Answers for Different Jobs 11. At previous jobs, what have you done to help your colleagues meet their goals? In other words: are you a team player? If...