Tera Data Interview Questions and Answers
Question - 11 : - What are the newly developed features of Teradata?
Answer - 11 : -
Some of the newly developed features of Teradata are: –
- Automated temporal analytics
- Extension in the compression capabilities which allows flexible compression of data about 20 times more data than the previous version.
- Customer associated innovation like tetradata viewpoint.
Question - 12 : - Highlight a few of the important components of Teradata.
Answer - 12 : -
Some of the important components of Teradata are: –
- Bynet
- Access Module Processor (AMP)
- Parsing Engine (PE)
- Virtual Disk (vDisk)
- Virtual Storage System (VSS)
Question - 13 : - Mention the procedure via which, we can run Teradata jobs in a UNIX environment.
Answer - 13 : -
All you have to do is perform execution in UNIX in the way as mentioned below.
$Sh > BTEQ < [Script Path] > [Logfile Path]
or
$Sh > BTEQ < [Script Path] TEE [Logfile Path]
Question - 14 : - In Teradata, how do we Generate Sequence?
Answer - 14 : -
In Teradata, we Generate Sequence by making use of Identity Column
Question - 15 : - During the Display time, how is the sequence generated by Teradata?
Answer - 15 : -
All you have to do is use CSUM.
Question - 16 : - If Fast Load Script fails and only the error tables are made available to you, then how will you restart?
Answer - 16 : -
There are basically two ways of restarting in this case.
- Making the old file to run – Make sure that you do not completely drop the error tables. Instead, try to rectify the errors that are present in the script or the file and then execute again.
- Running a new file – In this process, the script is executed simply using end loading and beginning statements. This will help in removing the lock that has been put up on the target table and might also remove the given record from the fast-log table. Once this is done, you are free to run the whole script once again.
Question - 17 : - Mention a few of the ETL tools that come under Teradata.
Answer - 17 : -
Some of the ETL tools which are commonly used in Teradata are DataStage, Informatica, SSIS, etc.
Question - 18 : - Highlight a few of the advantages that ETL tools have over TD.
Answer - 18 : -
Some of the advantages that ETL tools have over TD are: –
- Multiple heterogeneous destinations, as well as sources can be operated.
- Debugging process is much easier with the help of ETL tools owing to full-fledged GUI support.
- Components of ETL tools can be easily reused, and as a result, if there is an update to the main server, then all the corresponding applications connected to the server are updated automatically.
- De-pivoting and pivoting can be easily done using ETL tools.
Question - 19 : - What is meant by Teradata Gateway?
Answer - 19 : -
Just like channel driver, Teradata Gateway acts as a medium of communication between the Parse Engine and applications that are attached to network clients. Only one Gateway is assigned per node.
Question - 20 : - What is meant by a Virtual Disk?
Answer - 20 : -
Virtual Disk is basically a compilation of a whole array of cylinders which are physical disks. It is sometimes referred to as disk Array.