WAEC GSM Phone Maintenance And Repair Essays & Obj Answers

(3a)
( i). Control Unit
( ii). Arithmetic Logic Unit
(iii) Registers
(3b)
(i.l Alt + F4 is used to close the current active window.
(ii) Ctrl + Esc is used to open the Start menu.
(iii.) Alt + Tab is used to switch between open windows or applications.
(3c)
(i)
*-CAUSES-*
(I) software glitches
(II)a malfunctioning power button.
(ii)
*-SOLUTIONS-*
(I) resetting the phone to its factory settings
(II) seeking technical assistance from a repair center.

4.a) Voice mail refers to the system that allows callers to leave recorded messages when the recipient is unavailable or unable to answer the phone. Voice messages, on the other hand, are the actual recorded messages left by callers in the voice mail system.

(b) The three audio components of a mobile phone that can be tested for fault using the metering method are:

1. Speaker: The component responsible for producing sound output from the phone.
2. Microphone: The component that captures audio input during phone calls or voice recordings.
3. Earpiece: The component through which the user listens to audio during phone calls.

(c) When using a multimeter set to buzzer mode, the values that should be read from the components listed in 4(b) when in good working condition are:

1. Speaker: The multimeter should produce a continuous beep indicating a closed circuit.
2. Microphone: The multimeter should produce a continuous beep indicating a closed circuit when sound is captured by the microphone.
3. Earpiece: The multimeter should produce a continuous beep indicating a closed circuit when sound is played through the earpiece.

5. (a) Online presence refers to the existence and visibility of a person, brand, or business on the internet. It includes having a website, social media profiles, and other online platforms where information about the entity can be found.

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(b) Three advantages of online presence to a business are:

1. Increased Reach and Visibility: Being online allows businesses to reach a global audience and increase their visibility to potential customers who may not have otherwise known about their products or services.
2. Cost-Effective Marketing: Online marketing strategies such as social media advertising, search engine optimization, and content marketing can be more cost-effective compared to traditional forms of advertising.
3. Customer Engagement and Feedback: Online presence allows businesses to directly engage with customers, receive feedback, and build relationships through platforms such as social media, email marketing, and online reviews.

(c) The appropriate ports through which each device can be connected to a desktop computer are:

(i) mouse: USB port
(ii) projector: VGA/HDMI port
(iii) network cable: Ethernet port
(iv) LCD monitor: VGA/HDMI port
(v) printer: USB port
(vi) microphone: Audio jack or USB port

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