web technology Online Quiz - 200

When configuring a Lookup transformation to use a dynamic cache, Informatica automatically creates a port named NewLookupRow to indicate whether a row was inserted, updated, or unchanged.

Router transformations have two group types: Input Group (receives incoming data) and Output Group (routes data based on conditions). There is no separate Default or User Defined group type - these are routing conditions defined within Output Groups. Options B and C incorrectly include Default Group as a separate type.

A Sorter transformation is classified as Active in Informatica because it can change the order of data rows and, when configured for distinct sorting, can reduce the row count. Active transformations modify the data flow and can change the number of rows passing through them. Passive transformations only modify data but preserve the row count.

A UNION transformation is Active because it combines rows from multiple input groups, which can change the total row count. The transformation merges data from different sources into a single output, potentially increasing or maintaining rows depending on the input data.

In Informatica, the flat file delimiter can be specified in the Target Definition when designing the mapping, and can also be overridden at the Session level during workflow execution. This two-level configuration allows for design-time defaults and runtime flexibility.

In a Detail Outer Join, all rows from the Master table are preserved, and only matching rows from the Detail table are included. Non-matching detail rows are discarded, while unmatched master rows are retained with null values for detail columns.

Informatica PowerCenter 8.x introduced Service Oriented Architecture (SOA) capabilities, allowing integration services to be exposed as web services. This was a major architectural shift from earlier versions, enabling better interoperability and service-based integration.

In Informatica Workflow Manager, Session, Email, and Command tasks are reusable - they can be created once and used in multiple workflows. Assignment and Control tasks are non-reusable and must be created within specific workflows.

J2EE applications are not limited to web-based applications only. J2EE (Java Enterprise Edition) supports multiple application types including web applications, application clients, Enterprise JavaBeans, and other distributed enterprise components. The statement is false.

JavaBeans are a reusable component model for Java, but they are not specifically J2EE components. JavaBeans can be used in any Java application context. J2EE components include servlets, JSP pages, EJBs, and other enterprise-specific technologies. The statement is false.

An HTML page is not itself a web component. Web components are custom, reusable HTML elements with encapsulated functionality (custom elements, shadow DOM, HTML templates). A regular HTML page may contain web components, but the page itself is a document, not a component.

Abstract methods cannot be static because abstract methods are designed to be overridden in subclasses, while static methods belong to the class itself and are not inherited for overriding. Making a method both abstract and static would be a contradiction in terms.

In Java, the Hashtable class extends the abstract class Dictionary. Although Dictionary is obsolete, it remains the direct superclass of Hashtable.

An Applet is a legacy Java program designed to be embedded within an HTML page, downloaded to the client web browser, and executed locally within the client's JVM environment.

The java.lang package is automatically and implicitly imported by the Java compiler into every compilation unit, meaning classes like String or System do not require explicit import statements.

Marker interfaces are interfaces with no methods that serve to mark a class for a specific purpose. Serializable, Cloneable, and Remote are classic examples - they tell the JVM or framework to treat the implementing class specially (e.g., make it serializable).

To enable natural sorting of a collection of custom objects (e.g., using Collections.sort()), the class must implement the Comparable interface and override its compareTo method. Alternatively, a Comparator can be used, but implementing Comparable is the standard way to define natural ordering.

Only objects of classes that implement the Cloneable interface can be cloned using the clone() method. Attempting to clone an object that does not implement this interface throws a CloneNotSupportedException.

The hashCode contract specifies that unequal objects may share the same hash code, known as a hash collision. Thus, hash codes are not strictly unique for every distinct object.

A thread in the JVM is indeed a separate path of execution that can run concurrently with other threads. Each thread has its own call stack but shares heap memory with other threads in the same process. This allows for parallel execution of tasks within a single program.