Computer Science Online Quiz Jr-I

Explanation
A mouse has two buttons and a wheel in the center. The wheel is used for scrolling up and down on web pages or documents. It allows the user to easily navigate through content without having to manually scroll using the scroll bars. The wheel is a common feature in computer mice and is designed to enhance user experience and productivity.

Explanation
The correct answer is "Monitor" because typically, when using a mouse with a desktop computer setup, the mouse is placed on a flat surface near the monitor. This allows for easy access and control of the cursor on the screen. Placing the mouse towards the CPU or keyboard would not be practical or efficient for navigating the computer interface. Therefore, the buttons of the mouse should be towards the monitor.

Explanation
When the button on the mouse is pressed and released once, it is referred to as "clicking". This action is commonly used to select or activate an item on a computer screen. "Double clicking" refers to the action of quickly pressing and releasing the mouse button twice in succession. "Moving" refers to the action of physically moving the mouse across a surface to control the cursor on the screen. Therefore, the correct answer is "Clicking".

Explanation
When using the mouse, it is recommended to always place the index finger on the left button. The left button is the primary button on the mouse and is used for most common actions such as selecting, clicking, and dragging. Placing the index finger on the left button allows for easy and efficient navigation and interaction with the computer. The other options mentioned, such as the right button and scroll wheel, are secondary buttons that have their own specific functions but are not used as frequently as the left button.

Explanation
A mouse is a part of a computer that helps us to open programs. It is an input device that allows us to navigate and interact with graphical user interfaces by moving a cursor on the screen and clicking on icons or buttons to open programs. The other options, such as printer and speaker, are not directly involved in opening programs on a computer.

Explanation
The start button appears at the bottom-left corner of the screen. This is a common placement for the start button in many operating systems, including Windows. The bottom-left corner is easily accessible for users as it is located near the taskbar, making it convenient to access the start menu and navigate through the system.

Explanation
The correct answer is "Power switch". The power switch is the first step to start a computer. It is a physical switch that controls the flow of electricity to the computer's components. By turning on the power switch, the computer's power supply is activated, allowing electricity to flow through the system and start the boot-up process. The power switch is usually located on the front or back of the computer case and is used to turn the computer on or off.

Explanation
The screen that appears once the computer has started is called the desktop. This is the main screen where users can access and organize their files, folders, and applications. It typically displays icons representing various programs and shortcuts, as well as a taskbar and a wallpaper. The desktop provides a graphical user interface that allows users to interact with the computer and access its functionalities easily.

Explanation
A mouse is an input device that allows users to control the movement of the cursor on a computer screen. By clicking and dragging the mouse, users can create drawings or sketches on various software applications. Therefore, the correct answer is "Draw pictures."

Explanation
When a mouse on a surface is moved, the arrow on the screen also moves. The arrow is the graphical representation of the mouse cursor on the computer screen. As the physical mouse is moved, it sends signals to the computer, which in turn moves the arrow on the screen accordingly. This allows the user to navigate and interact with different elements and icons on the screen. The other options, such as "Icon" and "Mouse pad," do not accurately describe the direct relationship between the physical movement of the mouse and the movement of the arrow on the screen.