OS function: providing a graphical user interface (GUI)

Name:

Date:

Class:

Quick Questions

Shade in the A or B circle for each question.

1. Which interface lets you control the computer by clicking windows, icons and menus?

A GUI

B CLI

2. Which one is part of a GUI?

A A prompt where you type commands only

B A pointer moved by a mouse to select icons

3. What is a window in a GUI?

A A box on screen that shows one program or file

B A small picture that stores the CPU state

4. What is an icon in a GUI?

A A small picture that represents a file, folder or program

B A list of typed commands the OS accepts

5. What is a menu in a GUI?

A A device that moves the pointer

B A list of options the user can choose from

Match the Pairs

Draw a line connecting each item on the left to its match on the right.

Left column		Right column
1WIMP		ANeeds more RAM and CPU time than: dir
2Pointer		BThis describes a command-line interface (CLI). A GUI is controlled using windows, icons, menus and a pointer.
3A GUI is easy for beginners because they click on pictures instead of remembering commands		CThe four main parts of a GUI: Windows, Icons, Menus and a Pointer
4A GUI uses more system resources than a CLI because it must draw graphics, windows and a pointer		DDouble-click the Recycle Bin icon
5A GUI is controlled only by typing commands at a prompt		EIt is the other way round. A GUI uses more system resources, such as RAM and CPU time, because it has to display graphics.
6A GUI uses fewer system resources than a CLI		FThe arrow on screen, moved with a mouse, that the user uses to click icons and choose menu options

Definitions

GUI

Fill in the Blanks

Complete each line of code by filling in the missing parts.

GUI = Windows, Icons, Menus, _______

GUI = _________ User Interface

doubleClick(____) open(app)

resources(GUI) _ resources(CLI)

IF user = "beginner" ____ interface ← "GUI" ENDIF

Spot the Error

Shade in the letter of the line that contains an error.

Question 1

A window ← "Notes"

B IF minimise = TRUE

C HIDE window

D ENDIF

Question 2

A interface ← "CLI"

B uses ← "windows, icons, menus"

C pointer ← TRUE

D OUTPUT interface

Question 3

A menu ← ["File","Edit","View"]

B FOR item IN menu

C OUTPUT item

D ENDIF

Question 4

A windows ← 3

B memoryUsed ← window * 50

C OUTPUT memoryUsed

Question 5

A icon ← "Recycle Bin"

B IF doubleClick = TRUE THEN

C CLOSE icon

D ENDIF

Answer Key

OS function: providing a graphical user interface (GUI)

Section A: Quick Questions

A — GUI

B — A pointer moved by a mouse to select icons

A — A box on screen that shows one program or file

A — A small picture that represents a file, folder or program

B — A list of options the user can choose from

Section B: Match the Pairs

WIMP → The four main parts of a GUI: Windows, Icons, Menus and a Pointer

Pointer → The arrow on screen, moved with a mouse, that the user uses to click icons and choose menu options

A GUI is easy for beginners because they click on pictures instead of remembering commands → Double-click the Recycle Bin icon

A GUI uses more system resources than a CLI because it must draw graphics, windows and a pointer → Needs more RAM and CPU time than: dir

A GUI is controlled only by typing commands at a prompt → This describes a command-line interface (CLI). A GUI is controlled using windows, icons, menus and a pointer.

A GUI uses fewer system resources than a CLI → It is the other way round. A GUI uses more system resources, such as RAM and CPU time, because it has to display graphics.

Section C: Definitions

GUI — Graphical user interface: the user controls the computer with windows, icons, menus and a pointer instead of typing commands. It suits beginners but uses more system resources than a CLI.

Section D: Fill in the Blanks

GUI = Windows, Icons, Menus, Pointer

GUI = Graphical User Interface

doubleClick(icon)
open(app)

resources(GUI) > resources(CLI)

IF user = "beginner"
  THEN interface ← "GUI"
ENDIF

Section E: Spot the Error

B — The IF statement is missing THEN. It should be IF minimise = TRUE THEN, so that clicking minimise hides the window.

A — A CLI uses typed commands. A GUI uses windows, icons, menus and a pointer, so the interface should be "GUI".

D — A FOR loop must be closed with NEXT, not ENDIF. ENDIF belongs to IF statements. It should be NEXT item.

B — The variable is called windows, not window, so window has no value. This shows each open window using more resources. It should be windows * 50.

C — In a GUI, double-clicking an icon opens it. The action should be OPEN icon, not CLOSE icon.