CDC 3CX5X Vol.1 & Vol.2 Pre-test
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(001) Which skill level does a trainee possess after initially entering into an AFSC?
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Helper
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Apprentice
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Journeyman
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Craftsman
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About This Quiz
This CDC 3CX5X VOL. 1 & VOL. 2 Pre-TEST assesses foundational knowledge in network engineering and computer science for Air Force Specialty Codes. It covers topics like network topologies, memory components, and device roles within networks, critical for professional certification.
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- 2.
(006) Which of these memory components is a unit of data that can store four hexadecimal digits?
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Bit
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Byte
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Word
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Segment
Correct Answer
A. WordExplanation
A word is a memory component that can store four hexadecimal digits. It is a unit of data that represents a fixed-sized piece of information that can be processed or stored in a computer system. In this case, a word can store four hexadecimal digits, which are commonly used in computer systems to represent binary data in a more compact and human-readable format. Therefore, the correct answer is word.Rate this question:
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- 3.
(008) Which network topology transmits all data simultaneously to all nodes on the backbone media?
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Physical star
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Physical bus
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Logical ring
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Logical bus
Correct Answer
A. Logical busExplanation
The logical bus network topology transmits all data simultaneously to all nodes on the backbone media. In a logical bus network, all devices are connected to a single backbone cable, and data is transmitted in both directions on this cable. Each device on the network receives the transmitted data, but only the intended recipient processes it. This allows for efficient communication between all nodes on the network, as data can be sent and received by multiple devices simultaneously.Rate this question:
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- 4.
(008) Which network topology has the advantage of having each node act as a repeater?
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Physical star
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Physical ring
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Physical bus
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Logical star
Correct Answer
A. Physical ringExplanation
A physical ring network topology has the advantage of having each node act as a repeater. In a physical ring, each node is connected to two other nodes, forming a circular loop. This structure allows for data to flow in a unidirectional manner, with each node receiving and forwarding the data to the next node. If a node fails or is disconnected, the data can still travel in the opposite direction, ensuring continuous connectivity. This redundancy and self-healing capability make physical ring topology advantageous for networks that require high reliability and fault tolerance.Rate this question:
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- 5.
(007) Which is a device (such as a computer or router) used as a connection point on a computer network?
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Node
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Media
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Packet
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Segment
Correct Answer
A. NodeExplanation
A node is a device that is used as a connection point on a computer network. It can be a computer, router, or any other device that is connected to the network. Nodes are responsible for sending, receiving, and forwarding data packets within the network. They help in establishing communication and facilitating the transfer of information between different devices on the network.Rate this question:
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- 6.
(006) Which numeric representation is the rightmost digit of a numeric value to include zeros?
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LSD
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MSD
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Radix
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Exponent
Correct Answer
A. LSDExplanation
The rightmost digit of a numeric value to include zeros is referred to as the Least Significant Digit (LSD). This means that even if there are zeros to the right of the digit, the LSD is still considered to be the rightmost digit.Rate this question:
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- 7.
(004) Which source can harm deep tissue and organs with little or no sensation of skin heating?
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Chemicals
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Electron tubes
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Ionizing radiation
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Non ionizing radiation
Correct Answer
A. Non ionizing radiationExplanation
Non-ionizing radiation can harm deep tissue and organs with little or no sensation of skin heating. Unlike ionizing radiation, which has enough energy to remove tightly bound electrons from atoms, non-ionizing radiation does not have enough energy to cause direct damage to DNA or cells. However, it can still cause harm by generating heat in the body, leading to tissue damage. Additionally, non-ionizing radiation can interfere with the normal functioning of cells and tissues, potentially causing long-term health effects.Rate this question:
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- 8.
(005) In which electrostatic discharge (ESD) class would sensitive items be in when the voltage ranges from 1,000 to 3,999?
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I
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II
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III
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IV
Correct Answer
A. IIExplanation
Sensitive items with a voltage range of 1,000 to 3,999 would be classified in ESD class II. ESD class II is for items that are sensitive to lower levels of electrostatic discharge. This means that they can be damaged by lower voltage levels compared to items in ESD class I. Therefore, sensitive items with a voltage range of 1,000 to 3,999 would fall into ESD class II.Rate this question:
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- 9.
(010) What is a layered set of protocols within a protocol suite working together to define communication between layers of the protocol suite?
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Protocol model
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Protocol stack
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Internet protocol
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Transmission control protocol
Correct Answer
A. Protocol stackExplanation
A protocol stack is a layered set of protocols within a protocol suite that work together to define communication between different layers of the protocol suite. This allows for the efficient and organized transfer of data between devices. Each layer in the stack has its own specific function and interacts with the layers above and below it to ensure smooth communication.Rate this question:
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- 10.
(014) What is an entity of data available to computer system users and is capable of being manipulated as an entity?
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File
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Cache
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Memory
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Database
Correct Answer
A. FileExplanation
A file is an entity of data available to computer system users and is capable of being manipulated as an entity. It refers to a collection of related information that is stored on a computer system. Users can access and modify the contents of a file, making it a versatile data entity. Files can be created, opened, edited, and saved by users, allowing them to organize and manage their data effectively.Rate this question:
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- 11.
(007) Which networking device modulates outgoing digital signals to analog signals for telephone line usage?
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Line Driver
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Multiplexer
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Switch
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Modem
Correct Answer
A. ModemExplanation
A modem is a networking device that modulates outgoing digital signals into analog signals specifically for telephone line usage. It allows digital data to be transmitted over analog telephone lines by converting the digital signals into a format that can be transmitted over the telephone lines. This enables devices such as computers to connect to the internet using a telephone line connection.Rate this question:
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- 12.
(001) What is comprised of positions 1 and 2 combined with the third positioned digit of an AFSC?
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Skill level
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Career field
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Career group
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Career field subdivision
Correct Answer
A. Career field subdivisionExplanation
The correct answer is career field subdivision. The question is asking about the combination of positions 1 and 2, along with the third positioned digit of an AFSC (Air Force Specialty Code). The AFSC is a code used by the Air Force to identify specific jobs and career fields. The career field subdivision refers to a further breakdown or specialization within a specific career field. Therefore, the combination of positions 1 and 2, along with the third positioned digit, determines the career field subdivision.Rate this question:
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- 13.
(008) Which network topology has all of the network nodes connected directly to a central controller?
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Physical star
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Physical bus
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Logical ring
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Logical bus
Correct Answer
A. Physical starExplanation
In a physical star network topology, all network nodes are connected directly to a central controller or hub. This central controller acts as a central point of communication and manages the flow of data between the nodes. This topology allows for easy management and troubleshooting, as each node is connected individually to the central controller. It also provides a high level of reliability, as the failure of one node does not affect the rest of the network.Rate this question:
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- 14.
(001) Before entering which skill level must an active duty trainee hold the rank of at least SSgt for?
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Apprentice
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Journeyman
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Craftsman
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Superintendent
Correct Answer
A. CraftsmanExplanation
An active duty trainee must hold the rank of at least SSgt before entering the skill level of Craftsman.Rate this question:
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- 15.
(015) The two major reasons why many users are attracted to Voice over Internet Protocol (VoIP) services are
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Reduced costs and world wide access
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No international costs and world wide access
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Lower costs and increased functionality
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No domestic costs and increased functionality
Correct Answer
A. Lower costs and increased functionalityExplanation
Many users are attracted to Voice over Internet Protocol (VoIP) services because they offer lower costs compared to traditional phone services. VoIP allows users to make calls over the internet, eliminating the need for expensive phone lines. Additionally, VoIP services often come with increased functionality, such as the ability to make video calls, send multimedia messages, and access voicemail through email. This combination of lower costs and increased functionality makes VoIP services highly appealing to users.Rate this question:
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- 16.
(004) At which minimum voltage must safety boards and emergency equipment be present?
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220
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440
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600
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800
Correct Answer
A. 600Explanation
Safety boards and emergency equipment must be present at a minimum voltage of 600. This voltage level ensures that there is enough power for these systems to function effectively in emergency situations. Lower voltages may not provide enough energy for the equipment to operate properly, which could jeopardize the safety of individuals in critical situations. Therefore, it is essential to have safety boards and emergency equipment at a minimum voltage of 600.Rate this question:
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- 17.
(003) Which AFSC is responsible for reviewing and resolving electromagnetic interference problems?
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C-CS network integration (3C2X1)
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C-CS plans and implementation (3C3X1)
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Radio communication systems (3C1X1)
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Electromagnetic spectrum management (3C1X2)
Correct Answer
A. Electromagnetic spectrum management (3C1X2)Explanation
The correct answer is Electromagnetic spectrum management (3C1X2). This AFSC is responsible for reviewing and resolving electromagnetic interference problems. They specialize in managing the electromagnetic spectrum and ensuring that communication systems do not interfere with each other. They work to identify and mitigate any interference issues that may arise, allowing for effective and efficient communication systems to operate without disruption.Rate this question:
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- 18.
(006) What bit length do computer instructions use as an addressing scheme?
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4
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8
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16
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32
Correct Answer
A. 16Explanation
Computer instructions typically use a 16-bit length as an addressing scheme. This means that the instructions can address up to 2^16 (65,536) memory locations. A 16-bit addressing scheme allows for a larger memory space compared to smaller bit lengths like 4 or 8, but it is not as large as a 32-bit addressing scheme. The choice of a 16-bit length strikes a balance between memory capacity and efficiency in terms of the size of the instruction set and the complexity of the hardware required to process the instructions.Rate this question:
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- 19.
(001) What is a comprehensive task list that describes a particular job type or duty position?
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Air Force Qualification Training Package
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Career Field Education and Training Plan
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Air Force Job Qualification Standard
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Career development course
Correct Answer
A. Air Force Job Qualification StandardExplanation
The Air Force Job Qualification Standard is a comprehensive task list that describes the specific job duties and responsibilities for a particular job type or duty position in the Air Force. It outlines the skills, knowledge, and abilities required to perform the job effectively. This standard serves as a guide for training and evaluating personnel in their respective roles, ensuring that they are qualified and capable of carrying out their assigned tasks. The other options, such as the Career Field Education and Training Plan and Career development course, may also provide training and education, but they do not specifically describe the tasks and requirements of a particular job position.Rate this question:
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- 20.
(003) Which AF document would you use to note on-the-job training qualifications?
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Form 55
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Form 1098
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IMT 457
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IMT 623
Correct Answer
A. IMT 623Explanation
The correct answer is IMT 623. IMT 623 is the appropriate AF document to note on-the-job training qualifications. This document is specifically designed for recording and documenting on-the-job training qualifications, making it the most suitable choice for this purpose. Form 55, Form 1098, and IMT 457 are not specifically intended for this type of documentation, so they would not be the correct choices.Rate this question:
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- 21.
(007) Which networking device receives a digital signal transmission via a medium and regenerates the signal along the next leg of the medium?
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Router
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Repeater
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Converter
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Line Driver
Correct Answer
A. RepeaterExplanation
A repeater is a networking device that receives a digital signal transmission via a medium and regenerates the signal along the next leg of the medium. It amplifies and cleans up the signal to ensure that it can travel further without loss or degradation. This is especially useful in long-distance communication where the signal may weaken over the length of the medium. A router, converter, and line driver perform different functions in a network and do not specifically regenerate signals like a repeater does.Rate this question:
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Current Version
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Mar 18, 2023Quiz Edited by
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Sep 23, 2009Quiz Created by
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