web technology Online Quiz - 171

The inner printf prints the string and returns the number of characters printed (20). The outer printf then prints this return value as an integer. So the full output is 'What this will print20' on the same line, and the outer printf displays 20.

Bridge, Facade, Factory, and Flyweight are all classic design patterns from the Gang of Four book, used to solve common object-oriented design problems. They are not version control systems, GUI frameworks, or just words starting with 'f'.

EME (Enterprise Metadata Exchange) connects to Ab Initio Server through the EME Datastore Settings configuration. This is the standard method for establishing the connection between EME and the Ab Initio Co>Operating system.

The next_in_sequence() function generates unique sequential numbers, which is the standard way to create surrogate keys in Ab Initio for maintaining unique identifiers across records.

Partition components redistribute data across flows, and Gather components collect it. To change from 4-way to 8-way MFS, you'd repartition the data from 4 partitions to 8 partitions using these components.

Date_difference_days() computes the day count between two date values, returning the difference as an integer number of days.

A DB config file in Ab Initio contains connection parameters like database type, hostname, port, username, and credentials required to establish database connectivity for components like Input Table and Output Table.

Setting record-required 0 to false allows unmatched records from In0 to pass through (like a left outer join), while record-required 1 = true requires matches from In1. This gives all matching records plus unmatched In0 records.

Sort components are resource-intensive because they must collect all records before sorting, often require disk spillover for large datasets, and perform expensive comparison operations across the entire dataset.

In IBM Cognos 8 BI, the former Cognos 7 product 'Impromptu' was rebranded as ReportNet. The other options (Impromptu 8, cognos Impromptu 8.x, Reporter pro) are not the correct product names in the Cognos 8 BI suite.

Cognos Planner (now IBM Cognos Planning) is the specific Cognos product designed for planning, budgeting, and forecasting tasks. 'Cognos Pro Manager' and 'Cognos Project' are not the correct product names for this functionality in the Cognos suite.

Adding new XML Schema types is backward compatible because existing requestors don't reference or need these new types. Changing parameters (B), renaming operations (C), or changing complex data type structures (D) all break existing requestors that depend on the current definitions. WSDL is designed for extensibility through additions.

Synchronous communication is appropriate when steps depend on previous results (A) because you need each response before proceeding. It's also needed for real-time communication (D) where delays aren't acceptable. Option B describes asynchronous advantage, and Option C is unrelated to the sync/async choice.

Asynchronous Web Services are ideal for external partner integration because they don't require real-time responsiveness and can handle variable response times and network latency. Option A is incorrect because while message correlation is often used, it's not an absolute requirement. Option B is incorrect because async services actually DECOUPLE clients from processing. Option D is incorrect because async services are suited for long-running operations, not simple fast operations.

Karl Landsteiner discovered the ABO blood group system in 1901, for which he received the Nobel Prize. The question incorrectly spells it as 'Land Steiner' and includes 'Alexander S. Wiener' who co-discovered the Rh factor, not the basic blood types.

Nitrous oxide (N2O) is commonly called 'laughing gas' because it causes euphoria and laughter when inhaled. It was discovered by Humphry Davy and has been used as an anesthetic and in dentistry for its pain-relieving and euphoric effects.

Gasoline is obtained from crude oil through fractional distillation, which separates petroleum products based on their boiling points. Different fractions condense at different temperatures, producing gasoline, diesel, kerosene, and other products. Simple distillation doesn't separate effectively enough for complex mixtures like crude oil.