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SAP Netweaver Interview Questions & Answers - Learning Mode
COOLINTERVIEW.COM SAP INTERVIEW QUESTIONS SAP NETWEAVER INTERVIEW QUESTIONS QUESTIONS & ANSWERS - LEARNING MODE

SAP Netweaver Interview Questions & Answers - Learning Mode

SAP NetWeaver is a web-based, open integration and application platform that serves as the foundation for enterprise service-oriented architecture (enterprise SOA) and allows the integration and alignment of people, information, and business processes acr

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ABAP Interview Questions & Answers (287) Learning Mode | Exam Mode

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JAVA Connector Interview Questions & Answers (18) Learning Mode | Exam Mode

SAP BASIS Interview Questions & Answers (25) Learning Mode | Exam Mode

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SAP Netweaver Interview Questions & Answers - Learning Mode
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Question: What is ASCS/SCS?

Answer: With SAP NetWeaver 04 Java, the Message Server and the Enqueue Server are separated from the Central Instance. These two services are grouped within the SAP Central Services Instance (SCS) as services. From NW04s the ABAP Central Services can be also separated from the Central Instance. Each stack, ABAP and Java, has its own Message Service and Enqueue Service. For ABAP systems the Central Services are referred to as ASCS, for Java systems the Central Services are referred to as SCS. The ASCS an Source: CoolInterview.com
Question: What is an "Enqueue Replication Server"?

Answer: The Enqueue Server contains the central locking table for the SAP cluster. Besides database locks it also consists of infrastructure locks of system wide objects. It is therefore necessary to secure the locking table in case of a Standalone Enqueue Server failure. The SAP Enqueue Replication Server provides a replication mechanism for the Enqueue Server by holding a copy of the locking table within its shared memory segment. After a failure of the Enqueue Server the locking table can be restored Source: CoolInterview.com
Question: What do "shared nothing" and "shared all" mean?

Answer: The term ?shared nothing? and ?shared all? specifies a type of architecture within an active-active cluster. ?Shared nothing? means that every cluster node contains its own data partition, which implicates that these kinds of setup are not highly available due to the fact that in case of a failure the data of the failed node is no longer available. In a ?shared all? environment the different cluster nodes that run the same service shares a data partition and accesses the data concurrently.
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Question: Why is SAP using an active-passive cluster configuration?

Answer: Due to the SAP System Central Services Instance is a light component with low workload an active-active cluster configuration does not make a lot of sense. Source: CoolInterview.com
Question: What is the difference between Enqueue Server and Standalone Enqueue Server?

Answer: Since NW04 Java the Enqueue Server and the Message Server for a J2EE Engine are standalone services hosted by the SAP Central Services instance (SCS). The difference between a Standalone Enqueue Server and Enqueue Service is therefore only formal: The term ?service? refers to the Enqueue as part of the SCS; the term ?server? refers to the Enqueue as process, either enserver (.exe) or the enqueue work process within the ABAP stack. From NW04s the Enqueue Server and the Message Server are also imp Source: CoolInterview.com
Question: What is an "active-active cluster"?

Answer: An active-active cluster consists of two independent server nodes at a minimum. The workload within a cluster resource is shared between the server nodes. If a cluster node crashes the processes are resumed by the remaining cluster nodes. An active-active cluster configuration means that a cluster resource is active on all cluster nodes. The aim of an active-active cluster is not only to provide high availability system but to distribute the workload between the cluster nodes. Applications with Source: CoolInterview.com
Question: How do you convert basic cube to transaction cube and transaction cube to basic cube?

Answer: No answer available currently.
Question: Is there a session fail over mechanism for the J2EE?

Answer: The J2EE supports a session failover mechanism using DB or local persistence which can be implemented in applications. Please take a look into the documentation for further information on how to do that.

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Question: What is a "SPOF"?

Answer: A Single Point of Failure (SPOF) is any component within a system that, if it fails, causes a loss of a runtime critical service. A SPOF can be hardware or a software component. However, this FAQ only covers the SAP identified SPOF software components that are Message Server, Enqueue Server, the central file system and Database. In a High Availability manner it is necessary to eliminate these SPOF.

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Question: What is the Difference between open Payables and invoice ?

Answer: No answer available currently.
Question: Does SAP support Microsoft Geo Clusters?

Answer: SAP does not support Microsoft Geo Cluster at this time. Source: CoolInterview.com
Question: What is a "High Availability Cluster"?

Answer: The aim of a High Availability Cluster (HAC) is to provide the availability of specific services within a system landscape. This is reached by reducing downtimes using redundant cluster nodes. A common HAC setup consists of two cluster nodes, which is the minimum for redundancy. If one server node crashes, the second node takes over the clustered services and secures the availability this way. This is also called a "two-node cluster" or a "failover cluster." According to the demands of availabil Source: CoolInterview.com
Question: What is "fallback"?

Answer: ?Fallback? is referred to the process of switching back from a secondary server node to the primary server node after a failover occurred and the primary server node is available again. A fallback can be done automatically by the cluster software or intelligent, which means manual by the system administrator. Source: CoolInterview.com
Question: Exact Definition for open Payables for Partner Portal for Suppliers?

Answer: No answer available currently.
Question: What does "virtualization" mean?

Answer: The term ?virtualization? in the context of HA refers to a kind of abstraction performed by the cluster software. The software creates a virtual host that owns a virtual hostname, virtual disk, and so on. ?Virtual? in that manner means that such resources cannot only be owned by one physical machine but by all of them. Which node currently owns or runs a resource is managed by the cluster software. Related ?resources? are usually grouped to logical containers (for example Groups on MSCS or packa Source: CoolInterview.com
Question: What is the difference between HA for ABAP and HA for Java?

Answer: Within SAP NetWeaver 6.40 ABAP the Message Server and the Enqueue Server are integrated within the ABAP Central Instance (CI).

In SAP NetWeaver 6.40 Java the Message Server and the Enqueue Server are implemented as services within the SAP System Central Services Instance (SCS) and separated from the Central Instance (CI) this way.

With SAP NetWeaver 04s ABAP the Message Server and the Enqueue Server can be separated from the Central Instance (CI) to the ABAP SAP Central Services In Source: CoolInterview.com
Question: What is "switchover"?

Answer: ?Switchover? is referred to as a planned switchover of a primary server to a standby server, which means without a failure of the primary server. A switchover is always initiated by the system administrator. Source: CoolInterview.com
Question: What is "failover"?

Answer: ?Failover? is referred to the process of an unplanned switchover from a primary server to a standby server system in case of a system fail of the primary server node. Other than a switchover a failover is performed automatically by the cluster software. Some cluster software, such as Microsoft Cluster Service, does also provide an option for a manual failover for testing purposes.

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Question: Is an "Enqueue Replication Server" necessary for setting up an SAP HA system landscape?

Answer: With NW04 SP15 the Replication Server is required for all SAP JAVA HA scenarios.

Source: CoolInterview.com

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