C) Scream and run
you need to remain calm and carefully exit the building making sure you have everybody with you
Answer:
There are two basic operational modes of 8255:
Bit Set/Reset mode (BSR mode).
Input/Output mode (I/O mode).
Features of 8255 Microprocessor:
Mode 0 : Simple Input/Output.
Mode 1 : Input/Output with handshake.
Mode 2 : Bi-directional I/O data transfer.
It has three 8-bit ports : Port A, Port B, and Port C, which are arranged in two groups of 12 pins.
The 8255 can operate in 3 I/O modes : (i) Mode 0, (ii) Mode 1, & (iii) Mode 2.
Answer:
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Answer: D) Task-centered design
Explanation: Task centered design is the technique for a design to made in such a way that it can have the desired or expected result . The goals are set in it and the task is decided in a particular structure. Thus a design having any such system , it is known as task centered design. It is mainly focused on the user and the way this design can be used by them.