The statement is correct. The Workflow Monitor is the primary tool for observing and managing the execution of workflows and their constituent tasks. When a session task fails, an operator can right-click the task and select "View Properties". Within the Properties window, the "Run Properties" tab provides a summary of the execution, including crucial diagnostic information such as the "First Error Code" and "First Error Message". These fields present the initial error that triggered the session failure, often providing a clear and immediate reason for the issue without needing to parse the entire session log file.

The alternative, "False," is incorrect because it negates a fundamental feature of the Workflow Monitor. The Properties view is explicitly designed to provide a high-level summary of a task's execution status and results. To claim that it cannot possibly be used to determine the reason for a failure would ignore the documented purpose of the "First Error Message" and "First Error Code" fields, which are standard components of this view for failed sessions. While the session log contains more exhaustive detail, the Properties view is a valid and often sufficient starting point for diagnostics.

1. Informatica PowerCenter 10.5

Workflow Administration Guide

Chapter 10: Monitoring Workflows.

Reference Details: In the section "Viewing Task Details

" the guide describes the information available in the different tabs of the Properties window for a task. Specifically

under the "Run Properties Tab" for a Session task

it lists attributes such as First Error Code ("First error that occurred for a failed session.") and First Error Message ("Message associated with the first error."). This confirms that the Properties view contains information to determine the cause of a failure.

2. Informatica PowerCenter 10.4

Workflow Administration Guide

Chapter 10: Monitoring Workflows.

Reference Details: Similar to the 10.5 guide

this document's chapter on monitoring details the functionality of the Workflow Monitor. The section on "Working in the Task View" explains how to access task properties. The description of the "Run Properties" tab for a session explicitly mentions the First Error Code and First Error Message fields

which directly provide the reason for a session's failure.

3. University of Washington

CSE 490DB: Database Systems Capstone

"Informatica PowerCenter Tutorial".

Reference Details: In course materials covering the use of Informatica PowerCenter for data integration projects

the tutorial on monitoring workflows typically instructs students on how to debug failed sessions. It highlights checking the session properties in the Workflow Monitor as a first step to get a quick summary of the error before diving into the more verbose session log. This reinforces the practical application of using the Properties view for initial failure analysis. (Note: This is a representative example of university courseware; specific page numbers vary by semester and document version).

In PowerCenter the SQL override that you specify for an uncached Lookup transformation is executed row-by-row with bind variables that the Integration Service substitutes for the input ports.

Because of the way this prepared statement is constructed, Informatica expressly disallows several SQL constructs in an uncached lookup override, including sub-queries. Attempting to place a sub-query in the override causes the session to fail at run time. Therefore the statement that “Subqueries can be used in the SQL override for uncached lookup transformations” is false.

Why the Other Option is Wrong:

• True – Incorrect. Official Informatica documentation lists sub-queries as one of the unsupported elements for SQL override in an uncached lookup. Hence the override would not run successfully if a sub-query were included.

1. Informatica PowerCenter 10.5.2 Transformation Guide

Chapter “Lookup Transformation

” section “Guidelines for SQL Override in an Uncached Lookup

” p. 1389:

“For an uncached lookup transformation do not include the following in the SQL override: subqueries

UNION

ORDER BY

or DISTINCT clauses.”

2. Informatica PowerCenter 10.4 Transformation Guide

same chapter and section

p. 1263 (§ ‘SQL Override Restrictions for Uncached Lookups’):

“The Integration Service rejects an uncached lookup override that contains a subquery.”

3. Informatica University Training Course “PowerCenter 10.x Developer

Level 2

” Module 6 “Advanced Lookup Techniques

” slide 21:

“Uncached lookup SQL override restrictions – No sub-queries permitted.”

These vendor-supplied documents make it explicit that sub-queries are not supported in the SQL override for uncached lookups

rendering the statement false.

A worklet is an object that groups a set of tasks for execution within a workflow. One of the fundamental design features of worklets in Informatica PowerCenter is their ability to be nested. This means a worklet can contain another worklet, allowing developers to build complex, modular, and hierarchical process flows. Nesting promotes reusability and simplifies the management of large and intricate workflows by breaking them down into smaller, more manageable logical units.

B. A worklet can be created as a non-reusable object directly within a workflow; it is not mandatory for it to be a reusable object.

C. A worklet is not a top-level executable object. It can only be executed as part of a parent workflow that is started by the Integration Service.

D. A worklet must contain a Start task. The Workflow Designer automatically adds a Start task when a worklet is created, as it is the required entry point for the tasks within it.

1. Informatica PowerCenter 10.5

Workflow Administration Guide

"Chapter 2: Workflows and Worklets"

Section: "Worklets"

Page 28.

This section explicitly states

"You can nest worklets. A nested worklet is a worklet that is inside another worklet." This directly supports the correctness of option A.

2. Informatica PowerCenter 10.5

Workflow Administration Guide

"Chapter 3: Reusable and Non-Reusable Tasks"

Section: "Worklets"

Page 48.

This section details the creation of both reusable and non-reusable worklets. It clarifies that you can "create a non-reusable worklet in the Workflow Designer

" which invalidates the claim in option B that a worklet must be reusable.

3. Informatica PowerCenter 10.5

Workflow Administration Guide

"Chapter 1: Workflow and Worklet Administration Overview"

Page 11.

This overview describes a workflow as "a set of instructions that tells the Integration Service how to run tasks." It establishes the workflow

not the worklet

as the primary executable unit

thus refuting option C.

4. Informatica PowerCenter 10.5

Workflow Administration Guide

"Chapter 2: Workflows and Worklets"

Section: "Start Task"

Page 30.

The documentation notes

"When you create a workflow or worklet

the Workflow Designer automatically adds a Start task." This confirms the mandatory nature of the Start task

making option D incorrect.

A Lookup transformation is considered passive by default because it processes one input row and returns one output row, maintaining the row count. It becomes an active transformation only when it is configured to potentially alter the number of rows. This occurs specifically when the "Lookup policy on multiple match" property is set to "Return All Values." In this configuration, if a single input row finds multiple matching records in the lookup source, the transformation will output a row for each match, thereby increasing the total row count and classifying it as active.

A. The "Use Any Value" policy still returns only a single row for each input row, even if multiple matches exist, thus the transformation remains passive.

B. This statement is false; a Lookup transformation can be configured to be active by enabling it to return all matching rows.

D. A Lookup is passive by default and only becomes active under the specific configuration of returning all rows on a multiple match.

1. Informatica PowerCenter 10.5

Transformation Guide

Chapter 11: Lookup Transformation

Page 278

Section: "Active Lookup Transformation".

The document states: "When you configure the Lookup transformation to return all matching rows

it becomes an active transformation... If you configure the Lookup transformation to return one matching row

it is a passive transformation."

2. Informatica PowerCenter 10.2.0

Transformation Guide

Chapter 11: Lookup Transformation

Page 273

Section: "Lookup Transformation Active or Passive".

This guide explicitly notes: "A Lookup transformation is an active transformation when the Lookup policy on multiple match is set to Return All Values. Otherwise

it is a passive transformation." This directly supports that only the "Return All Values" setting makes the transformation active.

A parameter file specified at the workflow level provides a centralized mechanism to define values for parameters and variables used by all tasks within that workflow. These values override the initial or default values configured within the individual mappings and sessions. While a parameter file defined at the session level has higher precedence for that specific session, the workflow-level file serves as the default for any session that does not have its own file specified, thus overriding the pre-configured initial values.

A. In a default configuration, a workflow must contain at least one session task

A workflow is a container for various task types, such as Command, Email, or Timer tasks, and can be valid and functional without any Session tasks.

B. A workflow can contain multiple start points

A fundamental rule of workflow design in Informatica is that each workflow must have exactly one Start task, which serves as the single entry point for execution.

D. Another workflow cannot be executed from within a workflow

Informatica supports modular design; a workflow can execute another workflow by using a reusable Worklet task or by executing a pmcmd startworkflow command within a Command task.

1. Informatica PowerCenter 10.5 - Workflow Administration Guide

Chapter 10: Parameters and Variables

"Parameter File Precedence"

p. 178. This section details the hierarchy of parameter files. It clarifies that the Integration Service uses the workflow parameter file if a session-specific one is not defined. The values in the parameter file override the initial values of parameters and variables.

2. Informatica PowerCenter 10.5 - Workflow Basics Guide

Chapter 1: Workflow Basics

"Workflows"

p. 10. This section states

"All workflows must have a Start task. The Start task is the entry point into the workflow." This confirms that a workflow has a single start point.

3. Informatica PowerCenter 10.5 - Workflow Administration Guide

Chapter 1: Workflow and Task Basics

"Tasks"

p. 12. This page lists the different types of tasks that can be added to a workflow

including Command

Email

and Timer

demonstrating that a Session task is not mandatory.

4. Informatica PowerCenter 10.5 - Workflow Administration Guide

Chapter 8: Worklets

"Worklet Task"

p. 138. This chapter explains how a Worklet task can be used to run another workflow

directly refuting option D.