SAP Basis Interview Questions and Answers

SAP basis acts as an operating system or a platform for SAP applications to run.  It supports the entire range of SAP applications.

What is the difference between Developer Trace, System Log and System Trace?

System Trace: When you want to record internal SAP system activities, system trace is used. The trace is useful in diagnosis internal problems within SAP system and the host system.

System Log: To know the recent logs for application server and CI, System log is referred.

Developer Trace: In the event of problems, developer trace, records the technical information about the error or problem.

For problem analysis and system monitoring Developer trace or System log is used.

In private mode, the heap data is exclusively allocated by the user and is no more shared or available across the system. This occurs when your extended memory is exhausted.

Two users “OPS$adm” and “OPS$SAP” Service are created in your SAP system and to connect and communicate with database internally this user mechanism is used.

RFC (Remote Function Call) is a mechanism to communicate and exchanging the information between other SAP systems. 

There are four types of RFC’s system

1. Synchronous RFC (S RFC)
2. Asynchronous RFC (A RFC)
3. Transactional RFC (T RFC)
4. Queued RFC (Q RFC)

To export or import tables in SAP from OS level you have to follow three steps and by using R3trans utility in SAP

Step 1: Collect all list of tables to be exported

Step 2: Check whether enough disk space is available in the directory where you going to export.

Step 3: Create two control files for R3trans which will be used for import and export.

SAP Note: An error in a single transaction or program is removed by implementing a SAP note.

Kernel: Kernel contains the executable files (.EXE) like other applications and when a Kernel upgrade is done a new version of the EXE file replaces the older versions.

Support Package: SAP support packages is a bunch of corrections, this can be used by applying transaction SPAM

Table TADIR contains object directory entries.

JSPM (Java Support Package Manager) is used to apply support packages on deployed software components.  In other words, it’s a tool that allows you to install the components and support packages.

SDM (Software Delivery Manager) is used for importing Java Support Packages.  To deploy and manage software packages received from SAP, SDM tool is used.

To disable import all option from STMS in SAP, steps are:

• Go to STMS T-code
• Go to menu option overview
• Select System
• Choose SAP System
• Go to transport tool tab
• Create parameter “No_Import_All” with value set as 1
• Save it

Different types of users in SAP are

• Dialog Users
• System Users
• Communication Users
• Service Users
• Reference Users

Service User:  For “service user” initial password or expiration of password are not checked.  Only admin has rights to change the password, users cannot. Multiple logins are possible.

Usage: Service users are for anonymous users.  Minimum authorization should be given to such type of users

Reference User: For this kind of user’s GUI login is not possible.

Usage: In case of emergency, with the help of reference user, it is possible to provide one user authorization to another user.

A single stack system is defined by SAP system either with JAVA as runtime engine or SAP Netweaver as ABAP.

To use the JAVA patches, SAP installer (SAPinst.exe) is employed.  SDM and JSPM are the latest versions of tools used to deploy Java Patches.

To solve queries which cannot be solved by using the method interfaces, a set of information is used. This set of information is known as “Data Sets”.

A list of steps among t-code in known as logical LUW

Homogenous system copy = Same OS + Same Database

Heterogeneous system copy = Different OS + Different database or same database

Using BDC programming a data can be transferred successfully.

There are 3 functional modules which can be used in a sequence.

1. BDC _OPEN_GROUP: Name of the client, sessions and user name are specified in these functional modules.
2. BDC_INSERT: It is used to insert the data for one transaction into a session.
3. BDC_CLOSE_GROUP: It is used to close the batch input session.

To check the schedule background jobs and to execute them parameters like rdisp/btctime is used. These parameters define background processing batch scheduler.

SAP Internet Demonstration and Evaluation System or SAP IDES, this system demonstrate the functionality of various SAP solutions used by important customers.

The purpose of TDEVC contains development classes and packages.

1. Dialog
2. Enque
3. Update
4. Background
5. Spool
6. Message
7. Server
8. Gateway

Application Server takes the request from the user and if the request requires data then it connects to the database server and gives output.

• Customising Request
• Workbench Request
• Transport of Copies
• Re-location

Business KPIs are Key Performance Indicators.  It indicates the performance of a company at a strategic level. They help in leading the company on the desired track by comparing company’s previous performance with the market leaders in the same market.

Table T000 contains a list of defined clients, where we can maintain transaction code SCC4.

SAPS stand for SAP Application Performance Standard, which is a hardware independent unit which describes the performance of a system configuration in SAP environment.

Central Instance has message server and dialog, update, spool, enque, gateway, background work processes.

Application server has dialog, update, spool, gateway and background work process.

Four types of transport requests are there

1. Customizing request
2. Workbench request
3. Transport request
4. Relocation

Synchronous Transport – Dialog or batch process are blocked until import is ended

Asynchronous Transport – Dialog or batch process is released after import is started.

In consolidation route – objects can be changed and they can transport from one system to other. This is the route between development to quality

In Development route – Objects cannot be changed and they cannot be transported from one system to other. This is the route between quality to production

Default SAP systems are pre-installed with English and German.

SAP does support many other languages which may not full translate from the default English and German. To fill this gap, Supplementary language (a program) is installed.

It’s an old term for an implementation strategy.

Blueprint -> prototype -> goLive (if you want to say it in one sentence).