Q: What does the plus character [+] do in regex? or Q: What is the function of the plus symbol [+] in regex? Matches plus sign characters Matches one or more occurrences of the character before it Matches the end of a string Matches the character before the [+] only if there is more than one Explanation: The plus sign (also written as…
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When capturing regex groups, what datatype does the groups method return?
Q: When capturing regex groups, what datatype does the groups method return? or Q: What datatype does the groups function return after collecting regex groups? A string A tuple A list A float Explanation: When used inside the context of regex, the group’s method will return a tuple. The group’s function gives you the ability to extract the captured substrings as…
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Which command will print out the exit value of a script that just ran successfully?
Q: Which command will print out the exit value of a script that just ran successfully? or Q: What command will output a script’s exit value when it has completed successfully? wc variables.py echo $? echo $PATH import sys Explanation: The $? variable in Bash stores the exit status of the execution of the most recent command. It is…
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Which command will create a new environment variable?
Q: Which command will create a new environment variable? or Q: Which command is going to make an environment variable new? export env input wc Explanation: To generate or edit environment variables in Bash, the export command is the tool to utilize. You might use the following command, for instance, to create a new environment variable with the name…
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Which I/O stream are we using when we use the input function to accept user input in a Python script?
Q: Which I/O stream are we using when we use the input function to accept user input in a Python script? or Q: When we use the input function in a Python script to receive user input, which I/O stream is being used? STDOUT STDERR STDIN SYS Explanation: When we use the input() method in Python to receive input…
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A video conferencing application isn’t working due to a Domain Name System (DNS) port error. Which record requires modification to fix the issue?
Q: A video conferencing application isn’t working due to a Domain Name System (DNS) port error. Which record requires modification to fix the issue? or Q: A Domain Name System (DNS) port problem is causing a video conferencing application to malfunction. Which record has to be changed in order to resolve the problem? Canonical name (CNAME) Host (A) Text (TXT)…
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A complete Fully Qualified Domain Name (FQDN) is limited to how many characters?
Q: A complete Fully Qualified Domain Name (FQDN) is limited to how many characters? or Q: How many characters may make up a fully qualified domain name (FQDN)? 63 255 53 127 Explanation: The maximum number of characters that may be used in a Fully Qualified Domain Name (FQDN) must be 253. This comprises the domain name as well as the…
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During the name resolution process, which technique is used to avoid congestion when querying a server?
Q: During the name resolution process, which technique is used to avoid congestion when querying a server? or Q: Which method prevents server query congestion during the name resolution process? Redirect Hierarchy Lookup Anycast Explanation: During the process of name resolution, the practice of caching is used to prevent congestion from occurring. The process of caching includes keeping locally previously resolved…
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Which type of Domain Name System (DNS) server performs a full name resolution request?
Q: Which type of Domain Name System (DNS) server performs a full name resolution request? or Q: What kind of DNS (Domain Name System) server fulfills a complete request for name resolution? Authoritative name server Root name server Caching name server Recursive name server Explanation: A recursive DNS server is the kind of Domain Name System (DNS) server that is responsible…
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Network Address Translation (NAT) technology provides a major benefit for which of these network problems?
Q: Network Address Translation (NAT) technology provides a major benefit for which of these network problems? or Q: For which of these network issues does Network Address Translation (NAT) technology provide a significant advantage? Address exhaustion Port Preservation Routable addresses Assigning Internet Protocol (IP) address blocks Explanation: Within the context of the problem of IPv4 address depletion, the technique known as…