2021 Teradata Interview Questions

Teradata interview questions Before diving straight into the question answers, let’s get into a brief idea of Teradata utilities. Teradata is a Relational Database Management System (RDBMS) that powers massive Datawarehouse programs. The headquarters are located in San Diego, California and it was established in the year 1979. Both single and multi-node workloads can be accommodated in Teradata and the core principle of Teradata is Parallelism.

Teradata is becoming quite popular and resources are needed to support it are in demand as well. If you want to be part of the Teradata industry, get started to execute the learning process. To stand out among the numerous work profiles, each interview preparation must be near perfect. We’ve compiled a list of the most critical Teradata Interview Questions and Answers to assist you to ace your interview.

Teradata Interview Questions 2021

Share your basic understanding of Teradata?

Ans- In such a question always try to speak from your share of experience and learning rather than a bookish kind of answer. It is important to hight the technical aspect but if you have experience in this field try to put forward your perspective.

Teradata is taken into account when a company’s data mart, OLAP, and data warehouse applications are being created. When it comes to controlling the parallel processing of data, Teradata can be considered the best one. Teradata is a relational database management system that comprises some extensive and useful features making it suitable for a variety of data-related activities.

Mention some of the developed features of Teradata?

Ans- There are quite some developed features of Teradata that have surfaced, few features include-mechanized temporal analytics, compression capabilities have been improved, allowing for versatile compression of data up to twenty times larger than the older version and Teradata viewpoint.

Define some of the components of Teradata?

Ans- Some of the components that Teradata is composed of includes memory, hard drive, and processor chip. Memory can be defined as the main component where data is extracted from hard drives and stored in memory; the information is manipulated, modified, or altered by the processor. The processor transmits the data back to the hard drive for storing after making changes in memory. On the other hand, the hard drives can be regarded as the core where all the Teradata system’s information is stored on hard drives. The size of the hard drives indicates the Teradata system’s capacity.

Lastly, the processor chip is involved in processes the entire Teradata system, every function is carried out in accordance with the processor’s instructions.

What are the components of the Teradata system?

Ans- Some of the major components of the Teradata system include nodes, message-passing layer (MPL). Parsing engine and access module processor (AMP).

Briefly describe the prime index in Teradata?

Ans- The process that determines where data in a Teradata system is stored is defined as the primary index. In Teradata, the primary index must be listed for each table. In case the primary index for the table isn’t defined, Teradata will generate one. The primary index leads to data access and basically, there are two kinds of primary indexes namely Unique primary index and non-unique primary index.

How do you generate sequences in Teradata?

Ans- To generate the sequence in Teradata we must use the identity column.

Briefly describe the meaning of caching in Teradata?

Ans- Caching can be regarded as a benefit of Teradata since it mainly operates for a source that remains in the same sequence, which means it does not alter frequently. The cache is frequently shared between apps.

What is BTEQ utility in Teradata?

Ans- The BTEQ utility is the most effective tool in Teradata. It can be used in batch or interactive mode; also used to execute any DDL or DML argument, as well as macros and stored procedures. Another important usage of BTEQ is that it is used to import the data from a flat-file into Teradata tables. It can also be used to extract data in tables and save it to reports.

Teradata Interview Questions – What is a node?

Ans- A node is essentially a set of hardware and software components and can be regarded as a server also.

Why do multi-load support NUSI instead of USI?

Ans- In NUSI, the index sub-table row lies on the same Amp as the data row. As a result, each Amp is regulated independently and in parallel.

Teradata Interview Questions – Define TPD?

Ans- TPD is a Trusted Parallel Database, and operates on the PDE platform. Teradata is a database that mainly runs on the PDE platform. Teradata is also denoted as a Trusted Parallel or Pure Parallel database because of the same.

What is the difference between Teradata and basic RDBMS?

Ans- The differences between Teradata and basic RDBMS includes- Teradata is composed of several kinds of the destination while on the other hand, basic RDBMS lacks different destinations. Secondly, in basic RDBMS debugging is way more complicated whereas in Teradata it is easier. Teradata supports source operations while in basic RDBMS the source operation is not necessarily enabled all of the time. Also, in Teradata, the elements can be reused multiple times but in basic RDBMS reusability is limited to a large extent.

Define SMP and MPP platforms?

Ans- Hardware is linked to SMP technology while SMP (Symmetric multiprocessing) technology is used in the hardware that serves Teradata database applications. To shape MSP (Massively Parallel Processing) systems, the hardware can be paired with a communications network that links the SMP systems.

What is the meaning of Amp?

Ans- Amp full form is Access Module Processor and is a computer processor that is applied to handle one portion of the database. This section of the database can’t be linked with any other Amp. As a result, shared-nothing architecture is a common term for this type of architecture.

What is a virtual disk?

Ans- Simply described the virtual disk is a set of cylinders in the form of a physical disk and is also referred to as a disc array.

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