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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Which of these is NOT a utility that lets you create a bootable live USB drive for Linux?

Which of these is NOT a utility that lets you create a bootable live USB drive for Linux?

• LiveUSB Install
• UNetbootin
• GotLive
• LiLi 

EXPLANATION

LinuxLive USB Creator (also known as Lili) is a free and open-source software for Windows that can be used to install various Linux compilations, versions and distributions to a USB Flash Drive. The end result is a Bootable Live USB (in some cases with Persistence as well). UNetbootin allows you to create bootable Live USB drives for Ubuntu and other Linux distributions without burning a CD.

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Cloud solutions that can tolerate failures yet still provide service are referred to as what?

Cloud solutions that can tolerate failures yet still provide service are referred to as what?

• Highly available
• Highly portable
• PaaS
• IaaS 

EXPLANATION

High availability ensures that cloud solutions are always accessible. This means eliminating single points of failure, such as storing data on a single hard disk or single network connections.

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What MySQL feature allows for queries to be run periodically in the background, independent of a front-end program?

What MySQL feature allows for queries to be run periodically in the background, independent of a front-end program?

• MySQL Automatic Events
• MySQL Task Manager
• MySQL Event Scheduler
• MySQL Scheduled Tasks 

 

EXPLANATION

The MySQL Event Scheduler allows for queries to be run in the background at scheduled times, either as a one-off or recurring event.

SOURCE

https://dev.mysql.com/doc/refman/5.7/en/events-overview.html

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On a Cisco Catalyst switch, what are the Layer 3 interfaces called that are used to accomplish inter-VLAN routing?

On a Cisco Catalyst switch, what are the Layer 3 interfaces called that are used to accomplish inter-VLAN routing?

• SVI
• SIP
• Trunk interfaces
• RIP 

  EXPLANATION

VLANs divide broadcast domains in a LAN environment. Whenever hosts in one VLAN need to communicate with hosts in another VLAN, the traffic must be routed between them. This is known as inter-VLAN routing. On Catalyst switches it is accomplished by creating Layer 3 interfaces known as Switch Virtual Interfaces (SVI).
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