EXIN EXIN-CDCP Online Practice Questions and Exam Preparation

EXIN EXIN-CDCP Online Questions & Answers

• Question 81:

  When dealing with glass door racks, cool air is injected into the rack from:

  A. The rear door in a downflow direction.
  B. The front door in a downflow direction.
  C. The top of the rack through the fans and vents mounted inside the rack.
  D. The bottom of the rack.
  A. The rear door in a downflow direction.

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  Explanation

  Glass door racks are a type of rack that have solid glass front doors and rear door heat exchangers (RDHx).

  RDHx are devices that use facility coolant to absorb heat from the exhaust air of the IT equipment and return cool air to the room. RDHx can be either passive or active, depending on the fan configuration.

  In general, IT hardware within the rack is air-cooled and the door heat exchanger uses facility coolant to absorb heat from exhaust air to return air to the facility at or near inlet air temperature to the rack. This rear door heat exchanger can either be a passive or active solution. When dealing with glass door racks, cool air is injected into the rack from the rear door in a downflow direction. This means that the cool air flows from the top to the bottom of the rack, following the natural convection of the hot air rising. This way, the cool air can reach all the IT equipment in the rack and prevent hot spots or overheating.

• Question 82:

  A fire extinguisher in the data centre is found which is classed as ABC.

  Is this suitable?

  A. Yes
  B. Depends on the brand
  C. Only for fires not related to electrical power
  D. No
  D. No

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  Explanation

  A fire extinguisher in the data centre that is classed as ABC is not suitable, because it contains dry chemical powder that can damage the ICT equipment and the data. ABC fire extinguishers are designed to fight Class

  A, B, and C fires, which are fueled by combustible materials, flammable liquids or gases, and electrical equipment, respectively. However, the dry chemical powder can leave a corrosive residue on the ICT equipment, which can cause short circuits, data loss, or malfunction. Moreover, the dry chemical powder can be difficult to clean, especially from the small spaces and crevices of the ICT equipment.

  Therefore, ABC fire extinguishers are not recommended for data centres, and should be replaced with more suitable fire extinguishers, such as clean agent fire extinguishers, which use gas or liquid that does not leave any residue or harm the ICT equipment.

• Question 83:

  Management is reviewing a proposal with a low purchase price but high operating effort.

  What should be evaluated?

  A. Purchase price only
  B. Total lifecycle cost and operational impact
  C. The number of pages in the proposal
  D. Whether the proposal uses familiar colors
  B. Total lifecycle cost and operational impact

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  Explanation

  Lifecycle evaluation includes the continuing resources and operational consequences of a decision, not only the initial payment. A low entry price can produce poor value if ongoing effort and impact are high.

• Question 84:

  Which design consideration should be implemented with an Inergen-based fire suppression system?

  A. Install protective covers around the nozzles to avoid accidental gas dumps.
  B. Install the gas containers (tanks) close to the data centre.
  C. To use Inergen only for fires which are not related to electrical power.
  D. Pressure relief valves are required in the room that needs protection.
  D. Pressure relief valves are required in the room that needs protection.

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  Explanation

  A design consideration that should be implemented with an Inergen-based fire suppression system is to install pressure relief valves in the room that needs protection. Inergen is a clean agent fire suppression system that uses a mixture of inert gases (nitrogen, argon, and carbon dioxide) to displace the oxygen in the room and extinguish the fire. However, when Inergen is released into the room, it creates a sudden increase in pressure, which can damage the walls, doors, windows, and ceilings of the room. To prevent this, pressure relief valves are required to vent the excess pressure to the outside and maintain a safe pressure level inside the room. Pressure relief valves should be designed and installed in accordance with the relevant standards and codes, such as NFPA 2001 and ISO 14520.

• Question 85:

  New server equipment is arriving at your data centre, where should it be tested?

  A. In the Holding area
  B. In the Computer! Server room
  C. In the Media storage area
  D. In the Staging room
  D. In the Staging room

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  Explanation

  New equipment should be unpacked, tested, and configured in a dedicated staging room before being moved to the live data hall to prevent contamination and disruptions.

  References:

  CDCP Exam Preparation Guide, Staging/Receiving Area

• Question 86:

  What is the most cost-effective way to avoid EMF issues within the Computer room?

  A. Create a distance between the EMF source and the ICT equipment / copper network cabling
  B. Install TUVapp'oved shielding material
  C. Reducing the voltage in the computer room
  D. Reducing the temperature in computer room to 18 degrees C / 64= Fahrenheit
  A. Create a distance between the EMF source and the ICT equipment / copper network cabling

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  Explanation

  Physical separation is the most cost-effective method to minimize electromagnetic interference. Specialized shielding is more expensive and usually unnecessary if proper separation is maintained.

  References:

  CDCP Exam Preparation Guide, EMF Section

• Question 87:

  Which one of the following is the last stage in Stages of Combustion?

  A. Visible Smoke
  B. Intense Heat
  C. Incipient
  D. Flaming Fire
  D. Flaming Fire

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  Explanation

  The last stage in stages of combustion is flaming fire, which occurs when the fuel vapors and oxygen are mixed in the right proportion and ignited by a flame or a spark. Flaming fire is characterized by visible flames, intense heat, and rapid oxidation. Flaming fire can cause severe damage to the data center equipment, personnel, and business continuity. Therefore, it is important to prevent or suppress flaming fire as soon as possible using appropriate fire detection and suppression systems.

• Question 88:

  From the list below, which sensor detects smoke the fastest?

  A. Photoelectric detector
  B. VESDA/HSSD
  C. lonization detector
  D. Sprinkler bulbs
  B. VESDA/HSSD

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  Explanation

  VESDA (Very Early Smoke Detection Apparatus) or HSSD (High Sensitivity Smoke Detection) systems are the fastest smoke sensors among the options listed. These systems use a network of pipes to draw air samples from the protected area and analyze them using a laser-based detection chamber. VESDA/HSSD systems can detect smoke at very low concentrations, typically in the range of 0.005 to 20 percent obscuration per meter. This means they can provide early warning of a fire before it becomes visible or spreads. VESDA/HSSD systems are ideal for data centers and other critical facilities that require high levels of fire protection and minimal downtime.

• Question 89:

  Cost of Downtime can be classified as.

  A. Direct and Indirect
  B. Up and Down
  C. Mean and Median
  D. Classified and Declassified
  A. Direct and Indirect

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  Explanation

  Cost of downtime is the total amount of money lost due to a data centre outage or disruption. It can be classified into two categories: direct and indirect. Direct costs are the immediate and measurable expenses incurred during or after an outage, such as lost revenue, lost productivity, recovery costs, compensation costs, penalties, etc. Indirect costs are the long-term and intangible impacts of an outage, such as reputation damage, customer dissatisfaction, loss of market share, legal liabilities, etc. Both direct and indirect costs can vary depending on the type, duration, and severity of the outage, as well as the industry, size, and location of the data centre.

  References:

  EPI Data Centre Training Framework

  EPI Data Centre Competence Framework

  Understanding the Cost of Data Center Downtime Uptime Institute's 2022 Outage Analysis Finds Downtime Costs and Consequences Worsening [INFOGRAPHIC] The Cost of Downtime: 21 Stats You Need to Know

• Question 90:

  Which management action most directly connects data centre performance to business needs?

  A. Define service objectives from business requirements
  B. Measure only the number of installed cabinets
  C. Purchase equipment before confirming priorities
  D. Report only technical details with no service context
  A. Define service objectives from business requirements

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  Explanation

  Service objectives translate business expectations into outcomes that the data centre can manage and measure. Inventory counts and isolated technical details do not show whether business needs are being met.