Questions and Answers
What is the initial action to take when preparing to replace a smartphone screen?
Which protocol is primarily used for retrieving emails from remote servers?
What characteristic best describes the User Datagram Protocol (UDP)?
What is the default port number for secure web traffic using HTTPS?
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Which wireless standard operates solely on the 2.4 GHz frequency band?
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What layer of the OSI model is most likely functioning correctly if you can ping a website and receive an IP address?
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Which of the following IP addresses is categorized as valid for a private network?
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Which technology enables network administrators to prioritize specific types of traffic?
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Which type of memory is typically used in laptops?
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What is the purpose of a laptop's inverter?
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Which display technology is known for its deep blacks and high contrast ratio?
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What would be the first step to troubleshoot if a laptop's keyboard stops working?
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Which port is commonly used for docking stations on modern laptops?
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Which accessory connects a smartphone to an external display?
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What is the most common type of battery in mobile devices?
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Which technology allows smartphones to make payments by tapping on a terminal?
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What is the primary function of NAT (Network Address Translation)?
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Which connector is used to provide power to modern motherboards?
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Which of the following is an advantage of SSDs over HDDs?
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Which RAID level provides redundancy and allows for the replacement of a failed drive without losing data?
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Which type of memory is often used in cache for the CPU?
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What is the primary function of a heat sink in a computer?
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Which cloud model provides users with computing infrastructure such as virtual machines and storage?
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Which type of hypervisor is installed directly on the hardware of a host machine?
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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.
