The physical server that runs the hypervisor is known as the:

The physical server that runs the hypervisor is known as the:

• Master
• Trunk
• Host
• Root 

EXPLANATION

A hypervisor is a program that allows multiple operating systems to share a single hardware host. The hypervisor runs on a host server, which is the physical server that provides the resources used these virtual operating systems. https://en.wikipedia.org/wiki/Hypervisor
The term "Host" comes from the biological relationship between a host and a parasite. http://www.businessdictionary.com/definition/host-computer.html
 

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A device is having a problem accessing the web and internal network via Ethernet. The ticket says it's an OSI layer 1 issue. What is the most reasonable first troubleshooting step to take once you're at the user's desk?

A device is having a problem accessing the web and internal network via Ethernet. The ticket says it's an OSI layer 1 issue. What is the most reasonable first troubleshooting step to take once you're at the user's desk?

• Make sure the cable is plugged in and has link lights
• Check the IP address and make sure it is appropriate for the network
• See if it works in a different browser
• Make sure the TCP port isn't blocked 

 

EXPLANATION

Layer 1 is the physical layer. This layer transmits raw bits and doesn't differentiate them into packets.

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Which of the following file extensions is used by Windows PowerShell script files?

Which of the following file extensions is used by Windows PowerShell script files?

• .ps1
• .cmd
• .shl
• .cpp 

 

EXPLANATION

A PowerShell script is a text file with a .ps1 extension  

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Which of the following is true of IMAP?

Which of the following is true of IMAP?

• It uses port 110
• It sends and receives email
• It can only be used to send email
• It leaves messages on the mail server 

EXPLANATION

Unlike POP3, IMAP does not directly download and then remove messages from the mail server. Instead, it leaves the email on the server so that messages can be retrieved from various locations. IMAP is used only to retrieve email and uses port 143.
Here is some further discussion about this question

SOURCE

https://www.siteground.com/tutorials/email/pop3-imap-smtp-ports.htm

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What Linux command sets a files permission?

What Linux command sets a files permission?

• properties
• rights
• chmod
• attrib 

EXPLANATION

In order to make this practical, a method had to be devised to protect the users from each other. After all, you could not allow the actions of one user to crash the computer, nor could you allow one user to interfere with the files belonging to another user.
This lesson will cover the following commands:
chmod - modify file access rightssu - temporarily become the superuserchown - change file ownershipchgrp - change a file's group ownership

SOURCE

http://linuxcommand.org/lc3_lts0090.php

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Which of the following does ROBOCOPY stand for?

Which of the following does ROBOCOPY stand for?

• Recursive File Copy
• Robust File Copy
• Read Only Block Option Copy
• Robot Copy 

EXPLANATION

ROBOCOPY, or "Robust File Copy", is a command-line directory and/or file replication command

SOURCE

https://en.wikipedia.org/wiki/Robocopy

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Which of these is NOT a PHP class?

Which of these is NOT a PHP class?

• PDO
• XMLReader
• ErrorLog
• DateTime 

 

EXPLANATION

"ErrorLog" is the correct answer.  PHP has a function called "error_log", but it returns true/false and there is no object-oriented version like there is with some of the other classes.
PDO is a PHP extension for working with databases. XMLReader and DateTime are also classes, though they both have procedural versions too.

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