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Which design pattern provides a single class which provides simplified methods required by client and delegates call to those methods?

Which design pattern provides a single class which provides simplified methods required by client and delegates call to those methods? Correct Answer Facade pattern

Facade pattern hides the complexities of the system and provides an interface to the client using which client can access the system.

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Based on the paragraph given below answer the following question: The traditional methods of combinational circuits involve simplification and realization using gates. Using these methods, complex functions have been integrated and are easily available in IC form. There is an attractive array of devices like a multiplexer, demultiplexer, decoders, comparators, parity generators/checkers, which significantly reduce IC package count there by reducing the system cost. The system design is greatly simplified because the laborious and time-consuming simplification methods are generally not required with these devices. This also improves the reliability of the system by reducing the number of external wired connections. But they have some limitations as well. Different memories like ROM, PROM can also be used to implement combinational circuits without much simplification. A logic circuit required for converting BCD Code to 7 segment Code is known as:
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