EXIN EXIN-CDCP Online Practice Questions and Exam Preparation

EXIN EXIN-CDCP Online Questions & Answers

• Question 91:

  Which of statements below is true?

  A. Single-mode cabling can use both LED and laser as a light source.
  B. Single-mode cabling is more expensive than multi-mode cabling.
  C. Multi-mode cabling can cross longer distances.
  D. Multi-mode cabling is more expensive than single-mode cabling.
  B. Single-mode cabling is more expensive than multi-mode cabling.

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  Explanation

  Single-mode cabling and multi-mode cabling are two types of fiber optic cables that differ in their core diameter, wavelength, light source, bandwidth, distance, and cost. Single-mode cabling has a smaller core diameter and uses a laser as a light source, which enables it to transmit data over longer distances and higher bandwidths. However, single-mode cabling is also more expensive than multi-mode cabling, because it requires more precise alignmentand splicing, and more costly light sources and connectors.

  Multi-mode cabling has a larger core diameter and uses LEDs or VCSELs as a light source, which makes it cheaper and easier to install and maintain. However, multi-mode cabling also has a shorter distance and lower bandwidth than single-mode cabling, because it suffers from more modal dispersion and attenuation.

• Question 92:

  Does unplanned downtime of a data centre have an impact on the business results?

  A. No, because data centres operate independently from the business.
  B. No, unplanned data centre downtime is already financially planned for in the yearly budget planning process.
  C. Yes, data centre downtime can result in business downtime.
  D. Yes, but data centre downtime only impacts the airline industry.
  C. Yes, data centre downtime can result in business downtime.

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  Explanation

  1. This means that a typical data centre outage could cost a business over $840,000 in direct and indirect losses 1. Therefore, data centre downtime can have a significant impact on the business results, regardless of the industry or sector.

• Question 93:

  What should be taken into consideration when using patch cables?

  A. The patch cable should always be the same of a lower class the structured cable.
  B. The patch cable should always be the same or a higher class the structured cable.
  C. Patch cables can only be used in combination with flat patch panels.
  D. Patch cables can only be used in combination with angled patch panels.
  B. The patch cable should always be the same or a higher class the structured cable.

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  Explanation

  Patch cables of a lower class than the structured cabling can degrade the overall link performance, so it is best practice to use the same or higher class.

  CDCP Exam Preparation Guide, Cabling

• Question 94:

  Which formula is correct?

  A. Watt = VoIt-Ampere / Power Factor
  B. Watt = Volt-Ampere * Power Factor
  C. Power Factor = Volt Ampere ' Watt
  D. Volt-Ampere = Watt * Power Factor
  B. Watt = Volt-Ampere * Power Factor

• Question 95:

  A facility design places critical equipment against a wall with no rear access.

  What is the main operational concern?

  A. Routine servicing may require disruptive equipment movement
  B. The equipment will automatically consume more power
  C. The room will require a different security policy
  D. Network traffic will be reduced
  A. Routine servicing may require disruptive equipment movement

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  Explanation

  Insufficient service access can turn normal maintenance into a disruptive activity and increase the chance of affecting nearby equipment. Power use and network traffic are not determined by rear maintenance clearance.

• Question 96:

  What type of heal does ICT equipment generate?

  A. Latent heal
  B. Sensible heaT
  C. Both latent and sensible heat
  D. Radiant heat
  B. Sensible heaT

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  Explanation

  According to the Certified Data Centre Professional (CDCP(R)) reference materials, ICT (Information and Communication Technology) equipment such as servers, switches, and storage devices generate sensibl e heat. Sensible heat is the heat energy that causes a change in temperature of the air but does n ot contribute to humidity or moisture content. This is in contrast to latent heat, which involves a change in moisture (humidity) in the air, such as from evaporation or condensation.

  ICT equipment does not introduce moisture into the environment; it only raises the temperature of the surrounding air, making it sensible heat. Proper data center cooling focuses on removing this sensible hea t load to maintain optimal equipment operating conditions. Latent heat loads, such as those from people or water leaks, are typically not generated by ICT equipment and are managed differently in facility design.

  Radiant heat is a minor consideration and typically refers to heat transferred by electromagnetic waves (e.g., from sunlight or hot surfaces), not the primary mode of heat transfer from ICT equipment, which is primarily through convection (airflow) and is measured as sensible heat.

  EPI CDCP(R) Exam Preparation Guide:

  https://www.epi-ap.com/uploads/file/exam%20prep/english_preparation_guide_cdcp_202003.pdf

  EPI Certified Data Centre Professional (CDCP(R))

  Course Content:

  https://www.epi-ap.com/services/1/3/4/Certified_Data_Centre_Professional_(CDCP)EPIDataCentreFramework:

  https://www.epi-ap.com/content/31/67/EPI_Data_Centre_Framework

• Question 97:

  What should be considered when using a direct air handler for a data centre?

  A. Cost of operation as power consumption on these units tend to be higher compared to traditional air conditioning technology.
  B. Temperature, humidity and contamination of the outdoor environment.
  C. Space available inside the computer rooms as the air handler space requirement for the inside the Computer room is quite large.
  D. The availability of three-phase power due to the high power requirements of these air handler units.
  B. Temperature, humidity and contamination of the outdoor environment.

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  Explanation

  Direct air handlers are a type of cooling system that use outdoor air to cool the data centre. They draw in fresh air from outside, filter it, and supply it to the data centre at the desired temperature and humidity level.

  Direct air handlers can reduce the energy consumption and operating costs of data centres by eliminating the need for mechanical cooling or refrigeration. However, they also have some challenges and limitations that need to be considered. One of the main factors to consider when using direct air handlers for data centres is the temperature, humidity and contamination of the outdoor environment. Depending on the location and climate of the data centre, the outdoor air may not always be suitable for cooling the data centre. For example, if the outdoor air is too hot, too humid, or too polluted, it may not provide enough cooling capacity, or it may damage the IT equipment or cause corrosion. Therefore, direct air handlers need to have sensors and controls to monitor the outdoor air quality and adjust the airflow accordingly.

  They may also need to have backup cooling systems or supplementary cooling devices, such as evaporative coolers or heat exchangers, to cope with extreme weather conditions or peak loads.

• Question 98:

  During an incident, several technicians make unrecorded changes.

  Why is this a problem?

  A. It makes the equipment warranty automatically invalid
  B. It prevents reliable reconstruction of actions and outcomes
  C. It guarantees that every alarm will repeat
  D. It changes the physical size of the facility
  B. It prevents reliable reconstruction of actions and outcomes

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  Explanation

  Without an action record, the team cannot confidently determine what changed, what helped, or what introduced new effects. A clear timeline supports coordination, recovery, and later analysis.

• Question 99:

  What should be considered when implementing hot-or cold-aisle containment in an existing computer room?

  A. Equipment will get too hot at the rear (back) of the rack potentially resulting in more ICT hardware failures.
  B. The delta-T of the equipment will increase too much causing reliability issues.
  C. It creates potential issues with the existing fire suppression system(s).
  D. It will be more difficult to install power and network cabling in the contained area.
  C. It creates potential issues with the existing fire suppression system(s).

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  Explanation

  Hot-or cold-aisle containment is a strategy to improve the cooling efficiency and reduce the energy consumption of data centers by isolating the hot exhaust air from the cold supply air. However, implementing this strategy in an existing computer room may create potential issues with the existing fire suppression system(s), such as:

  The containment barriers may interfere with the distribution and activation of the fire suppression agents, such as water, gas, or aerosol, and reduce their effectiveness in extinguishing a fire.

  The containment barriers may create pockets of high temperature and pressure that could damage the equipment or the containment structure itself in the event of a fire.

  The containment barriers may obstruct the access and visibility of the fire detection and alarm devices, such as smoke detectors, heat sensors, or manual call points, and delay the response time of the fire suppression system(s).

  The containment barriers may violate the local fire codes and regulations that specify the minimum clearance and ventilation requirements for the data center.

  Therefore, when implementing hot-or cold-aisle containment in an existing computer room, it is important to consider the impact on the existing fire suppression system(s) and take appropriate measures to ensure the safety and compliance of the data center, such as: Consulting with the fire authorities and the fire suppression system vendor to assess the compatibility and suitability of the containment solution with the existing fire suppression system(s).

  Modifying or upgrading the existing fire suppression system(s) to accommodate the containment solution, such as relocating or adding fire suppression devices, adjusting the discharge rate and pressure, or installing a secondary fire suppression system within the contained area.

  Installing fire-rated containment barriers that can withstand high temperatures and resist the spread of fire and smoke, and that have self-closing or automatic release mechanisms in case of a fire.

  Installing fire detection and alarm devices within the contained area and ensuring their proper integration and communication with the existing fire suppression system(s).

  Conducting regular testing and maintenance of the fire suppression system(s) and the containment solution to ensure their functionality and reliability.

  References:

  EPI Data Centre Framework, Module 4: Fire Protection, page 10-11. EPI Data Centre Professional (CDCP? Reference Materials, page 66-67. 1, 2, 3.

• Question 100:

  Which one of the following is a Natural Disaster?

  A. Grid Failure
  B. Blackouts
  C. Hurricanes
  D. Human Error
  C. Hurricanes

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  Explanation

  According to the CDCP?Preparation Guide, a natural disaster is a catastrophic event that is caused by natural forces and has a significant impact on human lives, property, and environment. Hurricanes are examples of natural disasters, as they are powerful storms that form over warm ocean waters and produce strong winds, heavy rain, storm surges, and flooding. Grid failure, blackouts, and human error are not natural disasters, but rather man-made or technological disasters that result from failures or errors in human systems or activities.