Is the name given to graphical user interface controls. a) Properties b) Varchar

Question

Is the name given to graphical user interface controls. a) Properties b) Varchars c) Widgets d) Kintgets e) None of the above Which of the following is not a GUI design principle? A) Validation b) Repetition c) Alignment d) Contrast e) None of the above A framework contains default behavior and _______ code. a) Non-modifiable b) Indexed c) Graphics d) Instantiated e) None of the above A "turtle" object can ______. a) Be indexed b) Undo its own reference c) Report its state d) Issue a destructor e) None of the above The "turtle" window closed in response to ________. a) An event b) An exception being thrown c) IDLE warnings d) Poor aliasing e) None of the above The keyword used for the callback in "GUI for Fibonacci" was ________. a) alpha b) gamma c) phi d) lambda e) None of the above A callback function needs to ______ the argument it receives. a) Validate b) Recourse against c) Append d) Ignore e) None of the above A key objective in Form design is to ________ data entry. a) Use recursion on b) Perform memory addressing c) Append d) Minimize e) None of the above The three GUI layout options are pack, grid and __________. a) Book b) Place c) Block d) Table e) None of the above The key design principle for a __________. a) Contrast b) Repetition c) Alignment d) Proximity e) None of the above

Explanation / Answer

11.
Answer is c, Widgets
Tkinter provides various controls called widgets such as buttons, labels and text boxes etc.,

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12. The answer is a; validation

These four principles — contrast, repetition, alignment and proximity (CRAP) were given by Robert Williams. Clearly, validation is not one of them.

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13. Answer is a; non-modifiable

The framework code, in general, is not supposed to be modified but is extensibile. In other words, user can extend the framework, but should not modify its code.

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14.
Answer is d, Issue a destructor.

- Turtle object is iterable (can be indexed)

- can undo it's own reference, using undo()
- report it's state [postion(), pos(), xcor(), ycor(), heading(), distance().....]

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15. answer is a; an event

- turtle.exitonclick() binds the screen click event to do a turtle.bye() and then invokes turtle.mainloop()
- turtle.done() is a synonym for turtle.mainloop(), which transfers control to the tkinter event loop which keeps the window open until some user action closes it

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