CompTIA DS0-001 Online Practice Questions and Exam Preparation

CompTIA DS0-001 Online Questions & Answers

• Question 61:

  Which of the following services is responsible for assigning, managing, and reclaiming IP addresses on a TCP/IP-based network?

  A. DNS
  B. DHCP
  C. LDAP
  D. ISMTP
  B. DHCP

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  Explanation/Reference:

  The service that is responsible for assigning, managing, and reclaiming IP addresses on a TCP/IP-based network is DHCP. DHCP, or Dynamic Host Configuration Protocol, is a service that automatically assigns IP addresses and other network configuration parameters, such as subnet mask, default gateway, DNS server, etc., to computers or devices on a network. DHCP helps simplify the administration and management of IP addresses on a network, as well as avoid conflicts or errors caused by manual or duplicate assignments. DHCP also allows computers or devices to release or renew their IP addresses when they join or leave the network. The other options are either different services or not related to IP addresses at all. For example, DNS, or Domain Name System, is a service that translates domain names into IP addresses and vice versa; LDAP, or Lightweight Directory Access Protocol, is a service that provides access to directory information such as users, groups, or devices on a network; ISMTP is not a valid acronym or service. References: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.1 Given a scenario, select an appropriate database deployment method.

• Question 62:

  Which of the following ismostlikely to prevent tampering with server hardware that houses data?

  A. Biometric locks
  B. Strong password policy
  C. Network firewall
  D. Surveillance cameras
  A. Biometric locks

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  Explanation/Reference:

  The option that is most likely to prevent tampering with server hardware that houses data is biometric locks. Biometric locks are devices that use biological characteristics, such as fingerprints, facial recognition, iris scan, etc., to control access to a physical location or resource. Biometric locks help prevent tampering with server hardware that houses data by restricting unauthorized entry or theft of the hardware by intruders or attackers. Biometric locks also provide higher security and convenience than other types of locks, such as keys or passwords, which can be lost, stolen, or forgotten. The other options are either not related or not effective for this purpose. For example, a strong password policy is a set of rules or standards for creating and managing passwords for user accounts or systems; a network firewall is a device or software that controls the incoming and outgoing traffic on a network based on a set of rules or policies; surveillance cameras are devices that capture and record video footage of a physical location or resource. References: CompTIA DataSys+ Course Outline, Domain 4.0 Data and Database Security, Objective 4.2 Given a scenario, implement security controls for databases.

• Question 63:

  A business analyst queries the same few tables every quarter and does not want to write new SQL code every time. Which of the following would best support the business analyst's needs and allow the database administrator to optimize disk space?

  A. Table
  B. View
  C. Function
  D. Stored procedure
  B. View

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  Explanation/Reference:

• Question 64:

  Which of the following cloud storage options provides users with endpoints to retrieve data via REST API?

  A. Network file
  B. Object
  C. Ephemeral
  D. iBIock
  B. Object

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  Explanation/Reference:

  The cloud storage option that provides users with endpoints to retrieve data via REST API is object. Object storage is a type of cloud storage that stores data as objects, which consist of data, metadata, and a unique identifier. Object storage does not use any hierarchy or structure to organize data, but rather uses flat namespaces that allow users to access data using the unique identifier. Object storage also provides users with endpoints to retrieve data via REST API (Representational State Transfer Application Programming Interface), which is a standard way of communicating with web services using HTTP methods (such as GET, POST, PUT, DELETE) and formats (such as JSON, XML). Object storage is suitable for storing large amounts of unstructured data that do not require frequent changes or complex queries. The other options are either different types of cloud storage or not related to cloud storage at all. For example, network file storage is a type of cloud storage that stores data as files in folders using protocols such as NFS (Network File System) or SMB (Server Message Block); ephemeral storage is a type of temporary storage that stores data only for the duration of a session or process; iBIock is not a valid acronym or type of cloud storage. References: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.1 Given a scenario, select an appropriate database deployment method.

• Question 65:

  Given the following value from a VARCHAR column that is used to store integer values:

  12A

  Which of the following is the best way for a DBA to increase the data quality for this column?

  A. Keep the value and change the column to integer.
  B. Correct the value and change it to integer.
  C. Add a check constraint to the column and change it to int.
  D. Keep the column as VARCHAR and correct the value.
  C. Add a check constraint to the column and change it to int.

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  Explanation/Reference:

• Question 66:

  During a routine audit, a database administrator discovers that the department manager's birthday is next week. The database administrator decides to plan a birthday party for the manager. Which of the following guidelines would the administrator violate by planning the party?

  A. PII
  B. PCI DSS
  C. SOX
  D. ANSI
  A. PII

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  Explanation/Reference:

• Question 67:

  Which of the following firewall types allows an administrator to control traffic and make decisions based on factors such as connection information and data flow communications?

  A. Circuit-level
  B. Stateful
  C. Proxy
  D. Packet
  B. Stateful

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  Explanation/Reference:

  The firewall type that allows an administrator to control traffic and make decisions based on factors such as connection information and data flow communications is stateful. A stateful firewall is a type of firewall that tracks the state of each connection and packet that passes through it, and applies rules or policies based on the context and content of the traffic. A stateful firewall can control traffic and make decisions based on factors such as source and destination IP addresses, ports, protocols, session status, application layer data, etc. The other options are either different types of firewalls or not related to firewalls at all. For example, a circuit-level firewall is a type of firewall that monitors and validates the establishment of TCP or UDP connections; a proxy firewall is a type of firewall that acts as an intermediary between the source and destination of the traffic; a packet firewall is a type of firewall that filters packets based on their header information. References: CompTIA DataSys+ Course Outline, Domain 4.0 Data and Database Security, Objective 4.2 Given a scenario, implement security controls for databases.

• Question 68:

  Which of the following is a typical instruction that is found on a Linux command-line script and represents a system shell?

  A. /bin/bash
  B. #/bin/shell
  C. >/bin/sh
  D. #!/bin/bash
  D. #!/bin/bash

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  Explanation/Reference:

  The instruction that is found on a Linux command-line script and represents a system shell is #!/bin/bash. This instruction is called a shebang or a hashbang, and it indicates the interpreter that should be used to execute the script. In this case, the interpreter is /bin/bash, which is the path to the bash shell, a common system shell for Linux. A system shell is a program that provides an interface for users to interact with the operating system, either through commands or scripts. A system shell can also perform various tasks, such as file management, process control, variable assignment, etc. The other options are either incorrect or not typical for this purpose. For example, /bin/bash is the path to the bash shell, but it does not indicate the interpreter for the script; #/bin/shell is not a valid shebang or a path to a system shell; >/bin/sh is a redirection operator followed by a path to a system shell, but it does not indicate the interpreter for the script. References: CompTIA DataSys+ Course Outline, Domain 2.0 Database Deployment, Objective 2.2 Given a scenario, create database objects using scripting and programming languages.

• Question 69:

  Over the weekend, a company's transaction database was moved to an upgraded server. All validations performed after the migration indicated that the database was functioning as expected. However, on Monday morning, multiple users reported that the corporate reporting application was not working.

  Which of the following are the most likely causes? (Choose two.)

  A. The access permissions for the service account used by the reporting application were not changed.
  B. The new database server has its own reporting system, so the old one is not needed.
  C. The reporting jobs that could not process during the database migration have locked the application.
  D. The reporting application's mapping to the database location was not updated.
  E. The database server is not permitted to fulfill requests from a reporting application.
  F. The reporting application cannot keep up with the new, faster response from the database.
  A. The access permissions for the service account used by the reporting application were not changed.
  D. The reporting application's mapping to the database location was not updated.

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  Explanation/Reference:

  The most likely causes of the reporting application not working are that the access permissions for the service account used by the reporting application were not changed, and that the reporting application's mapping to the database location was not updated. These two factors could prevent the reporting application from accessing the new database server. The other options are either irrelevant or unlikely to cause the problem. References: CompTIA DataSys+ Course Outline, Domain 3.0 Database Management and Maintenance, Objective 3.2 Given a scenario, troubleshoot common database issues.

• Question 70:

  Which of the following sets the age requirement for data that should be recovered after a major disaster?

  A. MTBF
  B. RTO
  C. MTTF
  D. RPO
  D. RPO

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  Explanation/Reference:

  The option that sets the age requirement for data that should be recovered after a major disaster is RPO. RPO, or Recovery Point Objective, is a metric that defines the maximum amount of data that can be lost or acceptable data loss in the event of a disaster or disruption. RPOindicates how frequently the data should be backed up or replicated to minimize the risk of data loss. RPO also sets the age requirement for data that should be recovered after a major disaster, as it determines how far back in time the recovery process should go. For example, if the RPO is one hour, then the data should be backed up or replicated every hour, and the recovery process should restore the data to the state it was in one hour before the disaster. The other options are either different metrics or not related to data recovery at all. For example, MTBF, or Mean Time Between Failures, is a metric that measures the average time that a system or component operates without failure; RTO, or Recovery Time Objective, is a metric that defines the maximum amount of time that can be taken to restore a system or service after a disaster or disruption; MTTF, or Mean Time To Failure, is a metric that measures the average time that a system or component operates until it fails. References: CompTIA DataSys+ Course Outline, Domain 5.0 Business Continuity, Objective 5.3 Given a scenario, implement backup and restoration of data.