SAP HANA Interview Questions And Answers
Q1) How SAP HANA is different from its competitors?
||It make sure of minimum duplicity and redundancy
||There are issues related to redundancy and duplicity of data
||Data can be stored permanently
||It is not always possible
||Overall database management is low
||The same is very high
||A lot of storage space and cost can be saved
||This is not always guaranteed
Q2) What do you mean by SAP HANA?
HANA stands for High performance Analytical Application and is one of the best available tools for database management. It can directly be linked to ERP systems. It is possible for the users to consider the frontend modeling for the replication center in this approach. In addition to this, it is one of the best available tools for load control and management in the server.
Q3) Tell something you know about Normalization and De-Normalization?
Normalization is nothing but the process that is adopted for the purpose or removing the redundant data from the database. This is generally done by splitting the table into different sections. This actually makes sure of integrity. On the other side, the de-normalization is the process of considering the redundant data so that all the queries which are complex can be enhanced in terms of overall performance.
Q4) Organizations have to spend a very large amount of money every year on database management, are you agree with this?
Yes, this is totally right. However, it largely depends on the way a users is handling this approach. Basically, data management is a complex approach and there are a lot of tasks which are actually very critical. Managing the database without an effective tool is a big challenge. If an organization can consider a powerful tool like SAP HANA, a lot of tasks can be made simply and a ton of favorable outcomes can be derived simply.
Q5) SAP Hana Deployment Options
|Private Cloud, Managed Service
||Public Cloud Infrastructure-as-a-Service
||Public Cloud, Pay-as-you-go
|Reliable hosting environment
||Fast time to value
||Hourly pay-as-you-go rate
|Managed services approach
||No hardware investment
||Single database instance
|Increased flexibility and low TCO
||Run custom applications only
Q6) Why there is actually a need for the businesses to invest in a RDBMS tool in the present time?
Managing the data is very important. In the present time, data plays an excellent role in the success of almost every business. Data helps in decision making, collaborations, start new ventures, tackling competition, improving quality and so on. There are a large number of other reasons as well that are mandatory for the business to get it done in a right manner. Thus management of data is important.
Q7) By which command in SQL you can simply boost the visibility of the data in the database?
This can be done simply by DCL benefits
Q8) What you should look for in a Relational Database Management Tool while selecting the same
There are certain things that largely matters. The needs can vary depending on business to business. A few of the top factors to pay attention to are listed below.
1. It should be compatible and comfortable to us
2. The support must be extensible to different type of formats
3. There should be no limit on the data handling
4. The tool should be good enough to maintain the privacy and the security of data
5. There must be some defined filters for data management
6. The overall cost associated with the tools
7. Configuration and maintenance requirements
Q9) Name the two types of relational data which you can store in SAP HANA?
It is possible for the users to store following two types of Data in the system
1. Column Store
2. Row Store
There is not much difference between both and the users are free to consider the ones as per their need or the requirement.
Q10) Tell any one advantage that SLT replication offer
There are a lot of HANA studios and the SLT Replication can easily be integrated with almost all of them.
Q11) What sort of advantages do businesses have with effective database management?
- By data managing the users are free to derive results that can be considered for the long run
- A lot of difficulties related to data can be avoided easily
- The data can be managed in sections and can be accessed easily
- Well managed data is useful in designing reports, preparing documents and assisting various departments in other tasks
Q12) What are the various tasks in the SAP HANA which are performed by the Modeling Studio?
The very first task it perform is selecting the type of tables which are to be stored in the HANA. The selection of Meta data is also the responsibility of the modeling studio. All the data services for entering the data from warehouse or other location are handled by it. It simply manages the ERP instances connections. The entire data services can be used for modeling only through the modeling studio. Any sort of other modeling in the SAP HANA itself is handled by the studio. Moreover the tasks associated with the encoding are also managed and controlled by the modeling studio.
Q13) Can you name some important components of SAP HANA?
SAP HANA Appliance, Database, Application Control and Studio,
Q14) What exactly do you mean by the term Latency in database management? What can affect the same?
It is nothing but the total time taken for replication from source to target system. Latency depends largely on the size of the data.
Go through this SAP HANA TUTORIAL to get a clear understanding of how SAP HANA works.
Q15) Do you have any idea about the transformation rules?
These are basically the rules which are responsible for managing the source table. All the tasks that are performed on the table depend largely on these set of rules and regulations. A few of these rules are also applicable while handing some replication processes.
Q16) Can you tell some important benefits that users can have from the SLT Replication in SAP HANA?
It is basically an approach that has been categorized as triggered one i.e. users need not to worry about the overall impact of performance on the source system. The users can simply make sure of filtering, as well as transformation of the data even if the size is bulky. In addition to this, real-time data replication can also be assured by the users. It is possible for the users to simply make sure of multiple source systems to only one system based on HANA. The reverse action is also possible.
Q17) What problems can unnecessary information can cause in the SAP HANA and how you can avoid the same from being stored in the application?
Many times the users have to deal with the information that is not relevant with any task. Generally, it can cause slow data processing speeds and can affect accuracy and reliability upto a high extent. The users are free to temporary stop the replication and this can avoid the problem of storing any unwanted information or data in the system. To disable replication temporarily, the users just have to stop the schema related jobs in the system.
Q18) What do you know about the Master Controller Job in the HANA?
It is a controller that can be deployed for various reasons and purposes. It simply makes sure of creating logging tables and triggers the same in the system. The synonyms can also be created with the help of master controller. Also, the new entries in the administration tables can be made with the help of this approach. The whole table can also be loaded with this approach.
Q19) Can you tell something about the role of Transaction manager and Session in SAP HANA?
All the database transactions can be co-ordinated simply with the transaction manager and the users are free to keep a close eye on the closed as well as on the running transactions. The transactions are notified to the users when they are rolled backed or when they are committed. This makes sure of the smooth running of the storage engines.
Q20) Do you know something about the Data dependence and its types?
It is nothing but actually the ability to change the related schema definition at a level in such a manner that all future levels don’t have an impact on the same.
Q21) Tell the procedure of how SQL statement is processed?
The statement is implemented with a reference of the concerned transaction. Each transaction need user to begin with a new session. This can sometime consumes time but it is beneficial in the long run.
Q22) What exactly data redundancy is?
Data redundancy means duplicate data in the system. It adds unnecessary cost by grabbing the additional cost and can be the reason of slow operations of the database.
Q23) Define Database Management System in your own way?
A Database Management system is basically an array of programs with applications with the help of which the users are free to organize the information, retrieve the same, restore and maintain data efficiency in positive manner.
Check Out SAP HANA Administration Tutorials
Q24) Tell something about the type of relationships in the database?
1. One to one
2. One to many
3. Many to many
The One to One is that approach in which one table is directly associated with the other tables which are similar in terms of their column. The records can be same or they cannot be same in this approach. In the middle approach (One to many) one table is directly associated with another table and that has key relation outside the database. In the last approach every single record in the tables can relate multiple number or records which are present in another table.
Q25) What is functional Dependency in database?
It is a situation when one attribute defines another and is not under the similar control
Q26) Why DML compiler is significant according to you in a database management system?
The DML compiler is the one which is responsible for translations of DML statements into a language which is easy to understand by the Query Evaluation engine. It simply makes sure of no occurrence of errors in the database management.
Q27) What are the benefits that SQL can bring for you?
If the queries in the SQL are simple, the users are free to retrieve a very large sum of data very easily from the system. Another good thing about SQL is it is very easy to learn and implement. There is a vast support available for SQL and all the queries can be addressed reliably. Using SQL, the database can be managed very easily and in fact without considering a large amount of coding.
Q28) What do you mean by the term Record?
A record is nothing but a collection of values or the fields that belong to a specific entity such as the account managing the salary of an employee.
Q29) What are the advantages of views can bring in the database?
1. They simply make sure of accuracy
2. All the outcomes can be generated without the wastage of the resources
3. Access to the important data is always restricted and it doesn’t allow any sort of modifications in the data.
SAP HANA FAQs on Architecture:
Q30) What exactly is Data Definition Language?
These are the commands in SQLwhich are responsible for defining the structure in which data remains present. Generally, all the changes made to the data are saved automatically and the users don’t have anything to worry about the same.
Q31) What exactly is the significance of Persistence Layer in SAP HANA?
It is actually an important later in SAP HANA which plays a very important role. Actually, HANA has a computing engine built inside and the users have to utilize the data directly without taking any backup. The same can create an issue during powerful failure and thus it is necessary to keep a backup of the same. This layer comes as a savior and it make sure no loss of data during such a situation.
Q32) If I can run NetWeaver BW on IMDB/HANA, why can’t I run the Business Suite/ERP 6.0?
Just on the grounds that it's not developed enough yet to bolster business basic applications. From an innovation viewpoint, it is as of now conceivable to maintain the Business Suite on IMDB and SAP has trialed moving some vast databases into IMDB as of now.
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Q33) Explain Sap Hana Studio's Data provisioning?
Go to SAP HANA Modeler Perspective → Data Provisioning.
Q34) What is the Operating system requirement for SAP HANA?
SUSE Linux enterprise Server
Q35) How to Secure a sap Hana user connexion?
A Sap Hana database user is protected in the first place with a password. However, a password is very often required at the command line in order to connect and execute a batch or an SQL script. The username and password are then visible to anyone. In order to avoid that situation, it is possible to create a special key in relation to a particular user. Username and password are then invisible via the use of that key.
Q34) What is the best way to manage, operate, and monitor sap hana systems?
Sap Hana is a young database with interesting features of SAP HANA. First of all Sap Hana is an in-memory database. It is accessible for administration via various channels. Directly from the Server, It is not the most convenient method but you can use hdbsql to manage databases. With the web-based interface Hana cockpit, you can browse and manage sap hana environments. The Client Hana Studio is the complete tool to administer Sap Hana but it has to be physically installed and therefore is dependent on the client hardware.