Teradata Interview Questions and Answers
Most Frequently Asked Teradata Interview Questions
Teradata is a vast parallel open relation data management and processing system primarily used to develop large scale warehousing applications. As this is an open system, it can operate on Linux, Unix and Windows server platform. It also provides support to multiple data warehouse operations at the same time to different clients.
Here are a few benefits of using Teradata for your business:
- Superbly linearly scalable
- Extensive parallel processing
- Shared nothing architecture
- Improved performance of tables>
- Substantially improved compression
Teradata is based on MPP or Massively Parallel Processing architecture. Again, the MPP architecture of Teradata has three core components:
- Parsing Engine (PE) or Optimizer
Parser
Optimizer
Dispatcher
- Access Module Processor (AMPs)
- Messaging Layer (BYNETs)
Point-to-Point Communication
Multi-cast Communication
Broadcast Communication
| S.no | Teradata | Oracle |
|---|---|---|
| 1. | Database Management System primarily used for data analytics. | Widely used Relational database management systems |
| 2. | Server operating system: Linux. | Server operating system: AIX, HP-UX, Linux, OS X, Solaris, windows. |
| 3. | APIs and another access method: .NET Client API, HTTP REST, JMS Adapter, JDBC, ODBC and OLE DB. | APIs and another access method: ODP.NET, JDBC, ODBC and Oracle Call Interface (OCI) |
| 4. | Horizontal partitioning method used. | Sharding partitioning method used. |
Teradata SQL assistance is an advanced web-based query tool which developers used to store, retrieve and manipulate data from Teradata Database or any other database with an ODBC interface Its Java Edition can be used to attach to Teradata Database or any other database that provides the JDBC interface.
| S.no | Teradata | Redshift |
|---|---|---|
| 1. | DBMS primarily used for data analytics | A large scale data warehouse service to be used with business intelligence tools. |
| 2. | Not based cloud | Cloud-based only |
| 3. | Linux server operating system | Hosted server operating system |
| 4. | Offers XML support. | No XML support. |
| 5. | Offers secondary indexes. | I have restricted secondary indexes. |
| 6. | Has triggers | No Triggers |
Teradata IntelliCloud is an as-a-service offering for analytics at scale. It enables businesses to focus on analytic workloads and data warehousing while relying on Teradata for the setup, maintenance, management and support of the infrastructure and software.
Teradata Intelliflex is a platform specially designed for scalable enterprise analytics. It uses an advanced self-service software controls and MPP architecture for scaling of processing data and power capacity independently.
Teradata Tools and Utilities or TTU is a collection of database tools which offer an excellent set of supporting functions to Teradata database.