Mobile Devices Quiz

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Questions and Answers

What is the initial action to take when preparing to replace a smartphone screen?

Remove the back panel

Disconnect the battery

Remove the screen protector

Power off the device (correct)

Which protocol is primarily used for retrieving emails from remote servers?

POP3 (correct)

RDP

SMTP

FTP

What characteristic best describes the User Datagram Protocol (UDP)?

Connection-oriented

Connectionless (correct)

Error-correcting protocol

Higher overhead than TCP

What is the default port number for secure web traffic using HTTPS?

443 Signup and view all the answers

Which wireless standard operates solely on the 2.4 GHz frequency band?

802.11g Signup and view all the answers

What layer of the OSI model is most likely functioning correctly if you can ping a website and receive an IP address?

Network Signup and view all the answers

Which of the following IP addresses is categorized as valid for a private network?

172.16.20.5 Signup and view all the answers

Which technology enables network administrators to prioritize specific types of traffic?

QoS Signup and view all the answers

Which type of memory is typically used in laptops?

SO-DIMM Signup and view all the answers

What is the purpose of a laptop's inverter?

Convert DC to AC for backlight Signup and view all the answers

Which display technology is known for its deep blacks and high contrast ratio?

OLED Signup and view all the answers

What would be the first step to troubleshoot if a laptop's keyboard stops working?

Test with an external keyboard Signup and view all the answers

Which port is commonly used for docking stations on modern laptops?

USB-C Signup and view all the answers

Which accessory connects a smartphone to an external display?

USB-C to HDMI adapter Signup and view all the answers

What is the most common type of battery in mobile devices?

Lithium-ion Signup and view all the answers

Which technology allows smartphones to make payments by tapping on a terminal?

NFC Signup and view all the answers

What is the primary function of NAT (Network Address Translation)?

Translate IP addresses between private and public networks Signup and view all the answers

Which connector is used to provide power to modern motherboards?

24-pin ATX Signup and view all the answers

Which of the following is an advantage of SSDs over HDDs?

Greater durability Signup and view all the answers

Which RAID level provides redundancy and allows for the replacement of a failed drive without losing data?

RAID 5 Signup and view all the answers

Which type of memory is often used in cache for the CPU?

SRAM Signup and view all the answers

What is the primary function of a heat sink in a computer?

Cooling the CPU or GPU Signup and view all the answers

Which cloud model provides users with computing infrastructure such as virtual machines and storage?

IaaS Signup and view all the answers

Which type of hypervisor is installed directly on the hardware of a host machine?

Type 1 Signup and view all the answers

Study Notes

Mobile Devices

SO-DIMM is the memory type commonly used in laptops, optimized for space.
A laptop's inverter converts DC power to AC to illuminate the display's backlight.
OLED technology is known for its deep blacks and high contrast ratio, enhancing visual quality.
The first step in replacing a laptop hard drive is removing the battery to ensure safety.
USB-C is the prevalent connector for charging and data transfer on modern smartphones.
A dim laptop display when plugged in is likely due to a failing inverter, requiring replacement.
eMMC storage is slower compared to SSDs, making it less ideal for performance-intensive tasks.
NFC technology enables smartphones to make payments by simply tapping on a terminal.
For troubleshooting a non-working laptop keyboard, testing with an external keyboard is advisable.
USB-C ports are commonly used to connect docking stations to modern laptops.
The most common battery type in mobile devices is Lithium-ion, known for its energy density and rechargeability.
Factory resets can resolve software corruption issues, restoring devices to factory settings.
A USB-C to HDMI adapter connects smartphones to external displays for larger visuals.
Rebooting the phone is the first troubleshooting step for slow mobile data speed.
To replace a smartphone screen effectively, powering off the device is the initial step.

Networking

POP3 protocol is used to retrieve emails from a remote server to a local client.
UDP is characterized as a connectionless protocol, suitable for some types of applications.
The default port for HTTPS is 443, securing web traffic through encryption.
The 802.11g standard operates exclusively on the 2.4 GHz band, providing lower speeds compared to other standards.
Successful pings indicating an IP address suggests that the Network layer of the OSI model is functioning well.
172.16.20.5 is an example of a valid private IP address adhering to private network guidelines.
QoS (Quality of Service) allows network administrators to prioritize traffic for improved performance.
Cat6a cables are needed to achieve 10 Gbps speeds over short distances in networking.
DHCP protocol dynamically assigns IP addresses to devices within a network.
Maximum theoretical speed for 802.11n Wi-Fi connections is 600 Mbps.
Users with local network access but no internet connectivity likely have incorrect DNS settings.
A VPN encrypts all network traffic for secure communication over potentially insecure networks.
WAN (Wide Area Network) has the largest coverage area among various network types.
WPA2 encryption should be used for securing wireless networks, as it provides robust security.
NAT (Network Address Translation) translates IP addresses between private networks and the internet.

Hardware

The 24-pin ATX connector supplies power to modern motherboards in computing systems.
SSD advantages include greater durability, leading to longer lifespans compared to HDDs.
The ALU (Arithmetic Logic Unit) is a critical component of a CPU's architecture.
RAID 5 provides redundancy and allows for drive replacement without data loss.
SRAM (Static RAM) is often utilized as cache memory in CPUs, offering faster access speeds.
VGA connectors are common for analog video output, especially in older setups.
The yellow wire in a standard ATX power supply provides +12V.
The Network Interface Card (NIC) is the most common expansion card for adding Wi-Fi to desktops.
The primary function of a heat sink is to cool the CPU or GPU to prevent overheating.
Laser printers utilize a fuser mechanism to adhere toner to paper efficiently.

Virtualization and Cloud Computing

IaaS (Infrastructure as a Service) enables users to access computing resources like virtual machines and storage, offering flexibility.
Virtualization can significantly reduce hardware costs, which benefits businesses in resource management.
A Type 1 hypervisor operates directly on the hardware, providing better performance and efficiency than those installed on an operating system.

Hardware and Network Troubleshooting

Clicking noises from a computer and inaccessible files are indicative of hardware failures, often related to hard drives.

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Description

Test your knowledge about key concepts related to mobile devices, including components like SO-DIMM memory and USB-C connectors. Explore topics such as OLED technology, laptop repair, and storage types. This quiz is perfect for anyone looking to enhance their understanding of mobile technology.