2023年最新の100%試験高合格率CDCS-001問題集PDF
合格させる試験完全版CDCS-001問題集42解答
CDCS認定試験は、データセンターの運用に関連する広範なトピックをカバーしており、データセンターの設計、電源および冷却システム、ネットワークインフラストラクチャ、ストレージシステム、およびセキュリティを含みます。また、災害復旧、ビジネス継続性、およびリスク管理のベストプラクティスもカバーしています。この試験に合格することで、専門家はこれらのトピックの理解と、実世界のシナリオでそれらを適用する能力を証明することができます。
質問 # 16
Which one of the following is a Physical Security Device?
- A. Token card
- B. Contactless smart card
- C. Access Key
- D. Fiber optic cable
正解：B
解説：
Explanation
A contactless smart card is a physical security device that uses radio frequency identification (RFID) technology to identify and authenticate an individual. This type of card is used in a variety of applications, such as access control systems and digital payment systems. It is also used in physical access control systems, where the card is used to unlock doors or grant access to restricted areas. Contactless smart cards are also used in building access systems, where the card is used to grant access to certain areas of the building.
質問 # 17
Which one of the following measures the real power drawn by the load equipment?
- A. Watts
- B. Amps
- C. Amperes
- D. Volts
正解：A
解説：
Explanation
Watts measures the real power drawn by the load equipment and is determined by multiplying the volts and amps of the load
質問 # 18
Which one of the following Volt Configurations support commercial environments and data centers?
- A. 3-phase 280V
- B. Single phase 120V and 240V
- C. Single phase 120V
- D. Single phase 240V
正解：A
質問 # 19
Which power distribution component is often used when many electrical devices are enclosed proximity especially with audio, video and computers?
- A. Backup server
- B. Power distribution units (PDU)
- C. Outlet strips
- D. Server plug
正解：B
解説：
Explanation
The best option for enclosing many electrical devices in proximity, especially with audio, video and computers, is Power Distribution Units (PDUs). PDUs are designed to provide power to multiple devices using a single power source, such as a wall outlet or a generator, while providing protection against power surges.
PDUs are generally equipped with multiple outlets to allow for a variety of electrical devices to be connected and powered simultaneously.
質問 # 20
Which mounted system is used to cool small IT environments?
- A. Ceiling Mounted System
- B. Air Mounted System
- C. Floor Mounted System
- D. Chilled Mounted System
正解：B
解説：
Explanation
An air mounted system is often used to cool small IT environments. This type of cooling system is typically mounted on the wall or ceiling and works by blowing cool air into the room to lower the temperature. Air mounted systems are compact, easy to install and maintain, and can be a cost-effective solution for small spaces.
質問 # 21
How many approaches are there to remove unwanted heat from an IT environment?
- A. Seven
- B. Six
- C. Five
- D. Four
正解：C
解説：
Explanation
There are five common approaches to removing unwanted heat from an IT environment:
* Air conditioning: using mechanical cooling to remove heat from the air.
* Air economization: using outside air to cool the IT environment when the temperature is cooler than the desired temperature inside the data center.
* Liquid cooling: using a liquid coolant to absorb and remove heat from IT equipment.
* Evaporative cooling: using water evaporation to cool the air.
* Immersion cooling: submerging IT equipment in a liquid coolant to remove heat.
質問 # 22
____________ is a systematic variation of the voltage wave form or a series of random voltage changes of small dimensions.
- A. Voltage fluctuation
- B. Frequency variation
- C. Voltage truncation
- D. Standby variation
正解：A
解説：
Explanation
Voltage fluctuation is a systematic variation of the voltage waveform or a series of random voltage changes of small dimensions that occur over a period of time. Voltage fluctuation can be caused by a variety of factors, such as changes in demand, changes in the power system, faults on the power system, or the switching of large loads.
質問 # 23
True or False: Fuel availability generally dictates the type of standby generator selected
- A. False
- B. True
正解：B
解説：
Explanation
Fuel availability generally dictates the type of standby generator selected as different types of generators use different types of fuel. For example, gasoline generators are typically used in residential or small commercial applications, while diesel generators are usually used in larger industrial and commercial applications. Propane or natural gas generators may also be used, depending on the availability of fuel sources.
質問 # 24
Which one of the following is an advantage of Air Cooled Self-Contained System?
- A. It has more heat removal capacity per unit
- B. Lowest installation cost
- C. It doesn't requires ductwork and/or dropped ceiling
- D. All components contain more than one unit
正解：C
解説：
Explanation
Air cooled self-contained systems are highly efficient and do not require ductwork and/or dropped ceiling for installation. This makes them a great choice for locations where installation costs are a major factor, such as in residential applications, or in places with limited space. Additionally, air cooled self-contained systems have more heat removal capacity per unit compared to water cooled systems, making them more cost-effective in the long run.
質問 # 25
Which one of the following uses sensors such as laser beams or touch sensor?
- A. Backup device
- B. CCTV
- C. Alarms
- D. Server
正解：C
解説：
Explanation
Alarms are physical security devices that use sensors such as laser beams or touch sensors to detect movement or intrusion. These devices are used to alert the user of any unauthorized activity in the area. Alarms can also be used in combination with CCTV cameras to provide a comprehensive security system.
質問 # 26
___________ measures the amount of electrical current flowing through a circuit during a specific time interval.
- A. Ohm
- B. Watts
- C. Ampere
- D. Volts
正解：C
解説：
Explanation
An ampere (A) is the unit of measurement for electric current. It measures the amount of electrical current flowing through a circuit during a specific time interval. The ampere is named after Andre-Marie Ampere, a French mathematician and physicist who was one of the main discoverers of electromagnetism.
Ohm () is the unit of measurement for electric resistance, which is the opposition to the flow of an electric current through a circuit.
Volt (V) is the unit of measurement for electric potential difference, which is the energy required per unit charge to move a test charge between two places in a static electric field.
Watt (W) is the unit of measurement for power, which is the rate at which energy is used or generated in an electrical circuit.
References:
* "Current" (https://www.britannica.com/topic/current-electricity)
* "Electric current" (https://www.sciencedirect.com/topics/engineering/electric-current)
* "Units of Measurement"
(https://www.allaboutcircuits.com/textbook/direct-current/chpt-1/units-of-measurement/)
質問 # 27
Every air distribution system has a ____________ system and a _________ system
- A. Supply, Release
- B. Maintenance, Regulation
- C. Supply, Return
- D. Supply, Reverse
正解：C
解説：
Explanation
Every air distribution system has a supply system, which delivers conditioned air to the space, and a return system, which collects the air from the space and returns it to the air handling unit. The return system is responsible for providing the necessary negative pressure in the space to ensure proper air circulation.
質問 # 28
Data Center Precision Cooling Systems maintain temperature within _____________ degree(s) of their design set point.
- A. 0
- B. 1
- C. 2
- D. 3
正解：B
質問 # 29
A __________ generator system is a combination of an electrical generator and a mechanical engine mounted together to form a single piece of equipment.
- A. active
- B. standby
- C. software
- D. passive
正解：B
解説：
Explanation
A Standby Generator System is a combination of an electrical generator and a mechanical engine mounted together to form a single piece of equipment. The generator provides power to essential appliances and equipment in the event of a power outage. Standby Generator Systems are usually powered by gasoline, diesel, natural gas, or propane, and they are designed to be able to be activated quickly in the event of an emergency.
質問 # 30
Which one of the following is an overall consideration for physical security?
- A. Identify the problem
- B. Define the problem
- C. Apply the technology
- D. Apply the solution
正解：B
解説：
Explanation
Defining the problem is an important overall consideration for physical security. This process involves identifying and analyzing the threats and vulnerabilities that could potentially affect the security of the system, as well as determining what steps need to be taken to mitigate these risks. This process should be done before any other steps are taken to ensure physical security, as it helps to ensure that the security measures are tailored to the specific needs of the system.
質問 # 31
AC is more easily distributed than DC. This is because:
- A. AC can be transmitted using lighter wires.
- B. DC needs wires to be totally insulated, while AC wires can be bare, hung from insulator on pylons.
- C. Wires have less resistance if they are carrying AC
- D. AC can be transformed from a low voltage to a high voltage and back again with a transformer. DC cannot.
正解：D
解説：
Explanation
AC can be transformed from a low voltage to a high voltage and back again with a transformer, while DC cannot. This makes it easier to distribute AC electricity over long distances and is why it is used more widely than DC electricity. A and B are also true, as wires carrying AC can be bare and don't need to be totally insulated. Wires have less resistance when carrying AC electricity, which is why it is more efficient than DC.
質問 # 32
Which one of the following describes the amount of resistance electricity encounters?
- A. Watts
- B. Ohm
- C. Volts
- D. Ampere
正解：B
解説：
Explanation
Ohm () describes the amount of resistance electricity encounters. It is one of the base units of the International System of Units (SI), and is defined as the amount of resistance that a conductor has when a force of one volt is applied across it. Ohms are used to measure the electrical resistance of a circuit, and can be used to determine the power of a circuit or the amount of current flowing through it.
質問 # 33
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