SAP HANA Interview Questions and Answers
SAP HANA is an in-memory database: It is a combination of hardware and software made to process massive real time data using In-Memory computing. It combines row-based, column based database technology. We have listed of SAP HANA interview questions and Answers that have been designed for SAP HANA professionals who are preparing interviews on SAP HANA.
Best SAP HANA Interview Questions and Answers
SAP HANA originates from developed or acquired technologies, including TREX search engine, an in-memory column-oriented search engine, P*TIME, an in-memory OLTP database acquired by SAP in 2005. It’s best suited for performing real-time analytics, and developing and deploying real-time applications. Here, we have added some basic and advanced or both questions on SAP HANA Interview Questions and Answers.
What is SAP HANA?
SAP HANA is an in-memory data platform that is deployable as an on-premise appliance, or in the cloud. It is a revolutionary platform that’s best suited for performing real-time analytics, and developing and deploying real-time applications.
SAP HANA, short for “High-Performance Analytic Appliance” is an in-memory, column oriented,relational database management system developed and marketed by SAP AG.
Define Five-minute rule?
It is a rule of thumb for deciding whether a data item should be kept in memory, or stored on disk and read back into memory when required. The rule is “randomly accessed disk pages of cache are re-used every 5 minutes”.
Why SAP HANA?
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Define multi-core CPU?
Multiple CPU’s on one chip or in one package is called multi-core CPU.
What is columnar and Row-Based Data Storage?
A database table contains data in the form of rows and columns. However, Computer memory is organized as a linear structure. To store a table in linear memory, there are two options. A row-based storage stores a table as a sequence of records, each of which contains the fields of one row. In a columnar storage the entries of a column are stored in contiguous memory locations.
What are the advantages of Eliminating materialized aggregates?
This is Simplified data model, simplified application logic and Higher level of concurrency and With the fly Aggregation -we have aggregated values up to date.
What are the different types of replication techniques?
ETL based replication using BODS, Trigger based replication using SLT & Extractor based data acquisition using DXC
Define SLT?
SLT stands for SAP Landscape Transformation which is a trigger based replication. SLT replication server is the replication technology to pass data from source system to the target system. The source can be either SAP or non- SAP. Target system is SAP HANA system which contains HANA database.
What is Configuration in SLT?
The information to create the connection between the source system, SLT system, and the SAP HANA system is specified within the SLT system as a Configuration. You can define a new configuration in Configuration & Monitoring Dashboard (transaction LTR).
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