ITPEC FE Morning October 2020 Question 23

Topic: Human InterfaceAlso asked in Spring 2020

Which of the following is an appropriate usage of radio buttons in GUI applications?

a)To select multiple items from a group of itemsb)To select one item from a group of mutually exclusive itemsc)To select one item from a list or to enter new item into a text boxd)To select one item from a list that is displayed when a button is pressed

Explanation

Selecting one item from a group of mutually exclusive items — radio buttons allow exactly one choice in their group.

Radio buttons are shown together as a group; selecting one clears whichever was selected before, like the station buttons on an old car radio. They suit a small set of options that are all visible at once and exclude each other, such as a payment method or a shipping speed.

Answer (b)

Why not others:

•(a) — selecting several items from a group is the job of check boxes, which are independent of each other
•(c) — choosing from a list or typing a new value into a text box is a combo box
•(d) — a list that opens when a button is pressed is a drop-down list (pull-down menu)

Key rule: Match the GUI control to the choice: radio buttons for one of a few visible options, check boxes for any number, drop-down lists for one of many, combo boxes when a new value may also be typed.

Human Interface · AI-written, may contain errors

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