Technology Questions

WDM is conceptually the same as FDM, except that the multiplexing and demultiplexing  involve light signals transmitted through fiber optics channel.

Use the SORTWK01, SORTWK02,..... dd names in the step. Number of sort datasets depends on the volume of data being sorted, but a minimum of 3 is required.

- A process is an execution of a program, while a Thread is a single execution sequence within a process.

- A process can contain multiple threads. A Thread is sometimes called a lightweight process.

Cache events are processed only when the Postback events occur

Fact is key performance indicator to analyze the business.From the additive values, which are used to analyse the business by using report generation. Dimension is used to analyze the fact, are the non-additive ( text format) values, Which are used to drill down reports.Without dimension there is no meaning for fact. Measure is the quantity of data we create to process.

Overridden methods must have the same name, argument list, and return type (i.e., they must have the exact signature of the method we are going to override, including return type.)

The overriding method cannot be less visible than the method it overrides( i.e., a public method cannot be override to private).

The overriding method may not throw any exceptions that may not be thrown by the overridden method

At the time of updating the data warehouse, a lookup table is used. When placed on the fact table or warehouse based upon the primary key of the target, the update is takes place only by allowing new records or updated records depending upon the condition of lookup.

The materialized views are aggregate tables. It contains summarized data. For example, to generate sales reports on weekly or monthly or yearly basis instead of daily basis of an application, the date values are aggregated into week values, week values are aggregated into month values and month values into year values. To perform this process aggregate function is used.

Kano analysis is a systems analysis tool used to identify its impact on customer’s satisfaction based on 3 key areas: unexpected delighters, performance attributes and must have attributes.