D-pad, trackball or keyboard allows user to jump from selection to selection in which fashion
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can you please repeat the question in a better manner
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Your question seems to be incomplete:
D-pad,trackball or keyboard are used to test the sequence order for all Android OS's.
What is D-pad:
(i) D-pad stands for Directional pad.
(ii) A series of button placed in an arrow that provides navigation keys for the four directions.
(iii) They are generally used to navigate on-screen menus.
What is Trackball:
(i) It looks same as mouse but with movable ball on the top, which can be rotatable in any direction.
(ii) It is asymmetric.
(iii) You can place this trackball on any surface and use it conveniently.
Hope this helps!
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