Caché/ObjectScript Programming Quiz

An abstract method declares a method signature without implementation. It ends with a semicolon and has no body (no braces). Option C shows the correct syntax with semicolon and no braces.

WAR (Web Application Archive) files contain web applications ready for deployment on servlet/JSP containers like Tomcat or Jetty. They bundle HTML, JSP, JavaScript, classes, and configuration files.

A final method cannot be overridden in subclasses. This enforces that the implementation remains unchanged throughout the inheritance hierarchy. However, final methods can still be inherited and called by subclasses.

Session tracking can be implemented through multiple mechanisms: Cookies (stored on client), URL rewriting (appending session ID to URLs), and HttpSession (server-side session management). All three are valid approaches.

In Caché ObjectScript, %SerialObject is the base class for serial objects - objects that can be serialized but don't have independent storage. This is the correct inheritance for creating a serial class.

Both Open() and OpenId() are valid commands in Caché for opening objects. Open() takes an ID and optional flags, while OpenId() is specifically for opening by ID. Oref() returns an object reference, and New() creates instances.

In Caché ObjectScript, %classes refer to system classes - classes starting with % are provided by the system. User-defined classes don't use the % prefix. The claimed answer A (System) is correct.

In Caché, %RegisteredObject is the base class for transient objects - objects that exist only in memory and are not stored in the database. This is the correct inheritance for creating a transient class.

In Cache ObjectScript, the syntax ..#var1 is used to reference class parameters with indirection. The ## (double dot) operator provides access to class parameters, while the # symbol allows for parameter reference. Option w (write) is the command to output the value, making w ..#var1 the correct syntax for writing a class parameter value.

All five options are valid class keywords in Cache ObjectScript. Clientdatatype defines a custom data type class, Abstract prevents instantiation, super references the superclass, classtype defines the class category, and final prevents further inheritance or overriding. These keywords control class behavior and inheritance patterns.

Valid collation values in Cache ObjectScript are sqlupper (case-insensitive comparison), exact (case-sensitive exact match), and mvr (numeric range). Sqlvarchar and truncate are not valid collation values in the system. Collation determines how string comparison and sorting operations are performed.

Data type classes in Cache ObjectScript cannot be directly instantiated (they're abstract by nature) and automatically include methods for validation and translation when used. However, they CAN contain properties to define the data structure, and they CAN be inherited to create specialized data types. The claimed answer A and C are correct.

In Cache ObjectScript multiple inheritance, class keywords are inherited only from the first superclass in the inheritance list. Keywords from subsequent superclasses are not inherited. This prevents conflicts when multiple superclasses define conflicting keywords. The inheritance is determined by the order of superclasses in the class definition.

The correct XML syntax for welcome files in web.xml uses the element containing elements. This defines the list of files the server looks for when a user requests a directory URL (like '/').

In web.xml, welcome files must be defined within the element, with each file specified by a tag. This is the standard servlet specification syntax for configuring default files that load when a directory URL is accessed. The other options use incorrect element names that don't match the servlet specification.