BASIS /
NETWEAVER INTERVIEW QUESTIONS AND ANSWERS
Page - 7
61..Explain
about two services that are used to deal with communication in
SAP?
Message Service: Used by the application servers
to exchange short internal messages, all system communications.
Gateway Service: Enables communication between
Basis and external applications using CPI-C protocol.
62..Which SAP processes are started when the SAP system or an
instance is started?
A..SAPOSCOL
B..Message Server
C..Gateway Server
SAPOSCOL is an underlying process that
should always be running, even if the
SAP system is shut down. START_SAP_NOW
and LAUNCH_DB are made
up. The message server is started once
for each SAP system, and the gateway
server is started once for each
instance.
You can view ST02 to view the current values as
below
The following parameters are used to set the available size of
the SAP Roll area and Page area.
rdisp/ROLL_MAXFS....Total amount of Roll (Filesystem+SHM)
set in 8KB block
rdisp/ROLL_SHM......Shared memory element of Roll and
set in 8KB blocks
rdisp/PG_MAXFS......Total amount of Page (Filesystem+SHM)
set in 8KB block
rdisp/PG_SHM........Shared memory element of Page and set in 8KB
blocks
Be aware that the file system amount is equal to MAXFS
value minus the SHM value.
60MB or so each in memory should be sufficient for both SAP Page
and Roll area's.
Use SAP transaction RZ11 Profile Parameter Maintenance to set
the values. You should monitor the roll and paging usage after this to ensure
that more than 80% of each is never used as starting to use the paging and roll
files very regularly when buffers are exhausted would have some system
performance implications. You can check the history of each instance's usage of
these areas by double-clicking on the values from the initial screen of ST02.
64..which methods is it possible to create users in child systems in
the
context of active CUA?
A.. In the central system with
transaction SU01, Systems tab page.
B.. In the central system with
transaction SU01, Roles tab page
If you are using CUA, you can only
create users in child systems using
transaction SU01 in the central
system. The creation of users is possible using
the Systems, Roles, and Profiles
tab pages.
65..What is
the protocol used by the NetWeaver Gateway process?
SAP NetWeaver Gateway is a technology that
provides a simple way to connect devices, environments and platforms to SAP
software based on market standards. The framework enables development of
innovative people centric solutions bringing the power of SAP business software
into new experiences such as social and collaboration environments, mobile and
tablet devices and rich internet applications.
The software offers the
following capabilities:
OPEN - Any Device, Any
Experience, Any Platform
PEOPLE - Optimized for
user interaction scenarios
TIMELESS - Non
disruptive, any SAP Business Suite version
DEVELOPERS - Simple
APIs, no SAP knowledge, any tool
STANDARDS - Based on
REST, ATOM/OData
66..What are all the different types of
Log records in SAP Basis?
Transaction
code SM21 is used to check and analyze system logs
for any critical log entries. The SAP System logs is the all system errors,
warnings, user locks due to failed log on attempts from known users, and
process messages in the system log.
1. From the initial screen, go to System
Log -> Choose -> All
remote system logs. Set the date a day before and click on Reread
system log.
2. In the system log analysis window, you can
check/analyze the critical error message by double clicking to it.
The
list can be restricted for Problems Only, Problems and message and All
messages. The information in this list can further used to analyze the errors
which are indicated with Red sign under Priority. Also we get information of
Tcode that was used by the user when the error got generated. There are to two
different types of logs created by the system log:
A.. Local Logs
B.. Central Logs
67..What are the types of update requests in SAP?
There are two types of request :
A.. Customization request
B.. workbench Request.
68..How SAP GUI handles output screen for the user?
The SAP front-end s/w can either run on the
similar computer or on dissimilar computers given for that purpose. User
terminal input is accepted by the SAP terminal program SAP GUI, changed to SAP
proprietary format and sent to the SAP dispatcher. The dispatcher
coordinates the information exchange among the SAP GUIs and the work processes
69..What is the difference between
system Trace, Developer Trace,
and system Log in SAP?
Basically, Tracing is a complete set of information (messages)
which allows you to monitor the performance of an instance of a component and
the user activity that occurs in that component. Traces may allow you to
determine whether your component or application is working efficiently and as
expected, even as your application, component, and environment change
System Trace:
If you want to record the internal SAP system activities, use the function SAP
System Trace. Recording the processes in your application server enables you to
monitor the system and facilitates troubleshooting.
Developer Trace:
Developer traces contain technical information for use in the event of problems
with your system. Using the entries in the developer traces requires a
sophisticated knowledge of the host systems in which your SAP system is running
and of the SAP system itself.
System Log:
You can use the log to pinpoint and correct errors occurring in your system and
its environment.
70..What are
Homogenous system copy and Heterogeneous system copy? How you will do that?
When a homogeneous system copy is
performed, the target SAP system is installed on the same operating
system and the same database system as the source SAP system. The
contents of the database are copied from the source to the target system.
During a heterogeneous system copy, the operating system or the
database system is changed. Migration is a synonym for
heterogeneous system copy
