1. Compare Teradata with a basic relational database management system
Comparison between Teradata and a Basic Relational Database Management System
- Heterogeneous Destinations
- Teradata: Supports a large number of heterogeneous destinations.
- Basic RDBMS: Lacks support for many heterogeneous destinations.
- Source Operation
- Teradata: Source operations are allowed.
- Basic RDBMS: Source operations are not always necessary.
- Component Reusability
- Teradata: Components can be reused without any limitations.
- Basic RDBMS: Component reusability is limited.
- Debugging
- Teradata: Debugging is easy.
- Basic RDBMS: Debugging is difficult.
2. What do you know about Teradata?
Teradata is basically a relational database management system that is known due to some of its vast and useful features that are best enough to be considered for a number of tasks that are related to the data. It is considered when it comes to driving the data mart, OLAP, and data warehouse applications of a business. It is best enough to be considered when it comes to managing the parallel processing of the data simply in no time.
3. What is the true purpose of a Dispatcher in Teradata according to you?
Well, it is capable of being considered for performing multiple tasks. However, it is widely considered as best for taking and storing the requests in a queue. It can help in storing a very large number of requests in a defined manner. The multiple sets of responses can easily be created after this and the users can save time and effort both.
4. Name any two common ETL tools that you can use in the Teradata?
The two common ETL tools are Informatica and DataStage.
5. Is it possible to bypass or to send the Teradata jobs in the Unix Environment simply?
Yes, the same is possible and the users are free to do the same provided some basic conditions are fulfilled by them. This can be done by performing execution in UNIX.
6. Why managing the data is important
Well, data is the real source of deriving useful information and without data, many important tasks such as business management, decision making, problem formulation, and many other tasks that are useful cannot be accomplished easily. When the same is not managed, there are strong chances that the user will get errors in all of the above tasks. A well-managed data always enables users to save time and to locate things easily. There are a lot of other reasons as well due to which data management is important.
7. What exactly do you know about Catching in Teradata?
It is basically an add-on feature in Teradata which simply lets the users share the cache simply with all the applications. This is because it works closely with the source and even lets the users mold the outcomes in the manner they are comfortable with. This approach lets them save time when the data is complex and has so many errors associated with them.
8. What are the features of Teradata?
- Teradata can manage a large volume of data without facing any glitch
- There are very limited factors that can impact its important parameters such as performance
- The data can easily be managed even if most of the segments are unstructured
- A lot of useful information about the tasks that can be performed can be derived at the same time when data is managed with Teradata
- Teradata is an approach that has wide scalability and adaptability
- The tasks can be divided among the teams to obtain the true results
- It can help to manage bulk data in the shortest possible time
- Relational database management can be made superior in every aspect through Teradata
9. What do you know about a Channel driver in Teradata? How is it different from Gateway?
While managing the data and handling other tasks related to it, the users have to make sure that there is effective communication between the applications and the PE’s that are considered. For this, a software called Channel Driver is used. Generally, it acts as a direct link between them and enables clients to share information easily.
Gateways are quite similar to that of Channel driver but the only difference is they enable the communication of PE and applications in the case of network clients or for the clients who are attached to the network.
10. Name an approach that you can apply easily when it comes to controlling the traffic in Teradata?
This can be done with the help of a feature called Tpump which is actually a dedicated one for controlling and monitoring the traffic.
11. How will you restart the system in case the Fast Load Script fails to operate in a reliable manner?
This can be done with the help of two useful methods. The users can go ahead with running the old file without dropping the error table completely. Rather than rectifying the errors, they can execute the command again and again. The other method that can enable them to simply keep up the pace is running a new file. Basically, the script is executed in this process and something which helps them in this matter ends to load and beginning table. This generally removes all the barriers from the tables and the entire script can be run again easily.
12. While working with Teradata, what are the important functions that you have performed with the help of the Access Module Processor?
The Access Module Processor is actually loaded with the Database Manager subsystems. IT is because of no other reason the tasks that can easily be performed through it are performing DDL, DML, implementation of Joins and Aggregations, applying, and as well as releasing of the locks.
13. What is the easiest method to generate the sequence during the display time in Teradata?
This can be done with the help of a sub-feature known as CSUM.
It is not always necessary that these components are applied at the same time. Depending on the task, a specific or all of them can be used for getting the outcomes.
14. What is the limit of assigning the gateway to the node in the Teradata?
In complex applications, there is no such limit on how one Gateway is assigned per node during general use.
15. How will you check the version of Teradata? Is there any command in the Teradata for the same?
It can be checked easily with the following command “.SHOW VERSION”
16. In Teradata, why does the multi-load support NUSI rather than USI?
In Teradata, all the AMP are allowed to operate separately and they cannot be clubbed with USI especially when multi operations are executed at the same time. NUSI is a better approach that can easily be clubbed and a lot of time can be saved.
17. Tell something about the Parallel Data Extension in Teradata?
Parallel Data Extension is actually an interface layer that is responsible for operating the data in a parallel mode. In most cases, the volume of the data really doesn’t matter and the users are free to generate outcomes that are simply the best. This layer is present above the Operating system layer.
18. How can data be saved in case of a node failure?
While using Teradata, the users are free to take advantage of a supreme feature for this. All the Vprocs are set to automatically move to the parallel nodes from the one that fails and thus, the data can easily be recovered without making complex efforts.
19. What are the characteristics of Teradata which you are familiar with and how do you think they can help to get the desired outcomes.
- One of the best things about his approach is users are free to simply keep up the pace when it comes to running it on single, and on multi-nodes.
- The users are able to make it act just like a server and without doing much
- There are dedicated features of maintaining parallel processing in this technology
- When it comes to working with ANSI, it is largely compatible and the users are free to get the results
- It is actually a useful approach that can easily be clubbed with a different database management system for data migration
20. Tell something about the Virtual Disk?
It is actually a general compilation of a large group of cylinders that are nothing but disks. The users also call it the Disk Array. It is done to assure that in case of an emergency, the loss to the data is minimum as the same is already divided into the segments. It is possible to create backups and the users are therefore free to derive the outcomes accordingly.
