SAP BODS Interview QuestionsBy

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What is the use of BusinessObjects Data Services?

BusinessObjects Data Services provides a graphical interface that allows you to easily create jobs that extract data from heterogeneous sources, transform that data to meet the business requirements of your organization, and load the data into a single location.

Define Data Services componentsData Services includes the following standard

components:DesignerRepositoryJob ServerEnginesAccess ServerAdaptersReal-time ServicesAddress ServerCleansing Packages, Dictionaries, and DirectoriesManagement Console

What are the steps included in Data integration process?

Stage data in an operational data store, data warehouse, or data mart.

Update staged data in batch or real-time modes.

Create a single environment for developing, testing, and deploying the entire data integration platform.

Manage a single metadata repository to capture the relationships between different extraction and access methods and provide integrated lineage and impact analysis.

Define the terms Job, Workflow, and Dataflow?A job is the smallest unit of work that you can

schedule independently for execution.A work flow defines the decision-making process

for executing data flows.Data flows extract, transform, and load data.

Everything having to do with data, including reading sources, transforming data, and loading targets, occurs inside a data flow.

Arrange these objects in order by their hierarchy: Dataflow, Job, Project, and Workflow.?

Project, Job, Workflow, Dataflow.

What are reusable objects in Data Services?Job, Workflow, Dataflow.

What is a transform? A transform enables you to control how

datasets change in a dataflow.

What is a Script? A transform enables you to control how

datasets change in a dataflow.

What is a real time Job? Real-time jobs “extract” data from the body

of the real time message received and from any secondary sources used in the job.

What is an Embedded Dataflow? An Embedded Dataflow is a dataflow that is

called from inside another dataflow.

What is the difference between a data store and a database?

A data store is a connection to a database.

How many types of data stores are present in Data services?Three.Database Datastores: provide a simple way to

import metadata directly froman RDBMS.Application Datastores: let users easily

import metadata frommost Enterprise Resource Planning (ERP) systems.

Adapter Datastores: can provide access to an application’s data and metadata or just metadata.

What is the use of Compace repository? Remove redundant and obsolete objects from

the repository tables.

What are Memory Datastores? Data Services also allows you to create a

database data store using Memory as the Database type. Memory Data Stores are designed to enhance processing performance of data flows executing in real-time jobs.

What are file formats?A file format is a set of properties describing

the structure of a flat file (ASCII). File formats describe the metadata structure.

File format objects can describe files in: Delimited format — Characters such as

commas or tabs separate each field.Fixed width format — The column width is

specified by the user.SAP ERP and R/3 format.

What is repository? List the types of repositories.The DataServices repository is a set of tables

that holds user-created and predefined system objects, source and target metadata, and transformation rules. There are 3 types of repositories.

A local repositoryA central repositoryA profiler repository

What is the difference between a Repository and a Datastore? A Repository is a set of tables that hold

system objects, source and target metadata, and transformation rules. A Datastore is an actual connection to a database that holds data.

What is the difference between a Parameter and a Variable? A Parameter is an expression that passes a

piece of information to a work flow, data flow or custom function when it is called in a job. A Variable is a symbolic placeholder for values.

When would you use a global variable instead of a local variable?When the variable will need to be used

multiple times within a job.When you want to reduce the development

time required for passing values between job components.

When you need to create a dependency between job level global variable name and job components.

What is Substitution Parameter? The Value that is constant in one

environment, but may change when a job is migrated to another environment.

List some reasons why a job might fail to execute?Incorrect syntax, Job Server not running, port

numbers for Designer and Job Server not matching.

List factors you consider when determining whether to run work flows or data flows serially or in parallel?Consider the following:Whether or not the flows are independent of

each otherWhether or not the server can handle the

processing requirements of flows running at the same time (in parallel)

What does a lookup function do? How do the different variations of the lookup function differ?

All lookup functions return one row for each row in the source. They differ in how they choose which of several matching rows to return.

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