Which of the following languages requires server-side interpretation?

Which of the following languages requires server-side interpretation?

• CFML
• XML
• Java
• CSS 

 

EXPLANATION

ColdFusion Markup Language (CFML) is a scripting language that augments standard HTML files with database commands, conditional operators, high-level formatting functions, and other elements to produce web applications. CFML also includes numerous other constructs, including ColdFusion Components (CFCs), CFML's version of objects, which allow for separation of business logic from presentation.
CFML can be written using either tags or CFScript, which is an ECMA script-style language.
The pages in a CFML application include the server-side CFML tags and functions in addition to HTML tags. Modern CFML applications also tend to have CFCs that are accessed by the CFML pages for executing business logic. When a web browser requests a page in a ColdFusion application, it is automatically pre-processed by the ColdFusion application server.
ability
CFML can also be used to generate other languages,such as XML, JavaScript, and CSS.
Source: https://en.wikipedia.org/wiki/ColdFusion_Markup_Language

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Heaps and stacks are affected by which of the following attacks?

Heaps and stacks are affected by which of the following attacks?

• Buffer overflows
• Ping flood
• SQL injection
• Cross site scripting 

 

EXPLANATION

Heaps and stacks are data structures that can be affected by buffer overflows. A buffer overflow vulnerability allows an attacker to corrupt the execution stack of an application by inserting data into adjacent memory locations. This can cause application or operating system instability or, in the hands of a skilled attacker, even allow arbitrary code execution.

SQL Injection is a vulnerability that allows an attacker to query or manipulate a database using user input fields.
Cross site scripting is a vulnerability that allows for an attacker to inject client site scripts into web pages that is intended to be executed by other users.

A ping flood is a method of performing denial of service (DoS or DDoS) against network devices.

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The VHDX virtual hard disk format supports what maximum storage capacity?

The VHDX virtual hard disk format supports what maximum storage capacity?

• 640GB
• 6.4PB
• 64TB
• 6.4TB 

 

EXPLANATION

The VHDX disk format supports virtual hard disks as large as 64TB with power failure resiliency.

Reference: https://technet.microsoft.com/en-us/library/hh831446(v=ws.11).aspx

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Which of the following features of cloud computing matches resources to the current demand?

Which of the following features of cloud computing matches resources to the current demand?

• Elasticity
• Security
• Redundancy
• Availability 

EXPLANATION

Elasticity refers to the ability of a cloud service to scale on demand. Resources such as storage, bandwidth, or memory can be provisioned in a matter of minutes and scaled down when no longer needed.
https://en.wikipedia.org/wiki/Elasticity_(cloud_computing)

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What does a hop count of 16 mean in RIPv1?

What does a hop count of 16 mean in RIPv1?

• The administrative distance is 16
• The destination is an infinite distance away and unreachable
• The device is 16 hops away
• It established a 16 Mb connection to the device 

EXPLANATION

RIPv1 is a Classful routing protocol. Classful routing protocols support only the networks which are not subnetted. The maximum number of hops allowed for RIP is 15,
which limits the size of networks that RIP can support. A hop count of 16 is considered an infinite distance and the route is considered unreachable.

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In a Windows command script (cmd.exe), what does the string %~dp0 stand for?

In a Windows command script (cmd.exe), what does the string %~dp0 stand for?

• The script's current working directory
• The path, including drive, where the script resides
• The user's home directory
• The system's temp directory 

EXPLANATION

In the help for the FOR command, the %~ format for variable expansion is discussed.  This can be used outside of the FOR command as well.  The following options are relevant:
%~dI - expands %I to a drive letter only
%~pI - expands %I to a path only
The modifiers can be combined to get compound results, so
%~dp0 - expands %I to a drive letter and path only
Finally, %0 is the built-in variable reference to the path to the batch file that includes the file name (i.e. the 0th argument to the cmd.exe program).
The script's current working directory is returned using cd with no arguments.  It isn't necessarily the same as the script's parent directory, especially if the script is run from a non-system drive or UNC path.  In the latter case, the working directory can end up being set to the Windows directory.
The user's home directory is referenced by the "%HOMEDRIVE%\%HOMEPATH%" or %USERPROFILE% envars.
The system temp directory is referenced by the %TEMP% envar.

SOURCE

http://stackoverflow.com/questions/5034076/what-does-dp0-mean-and-how-does-it-work

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Which BASH internal variable holds the exit status of the previous command or function?

Which BASH internal variable holds the exit status of the previous command or function?

• $?
• $_
• $@
• $$ 

 

EXPLANATION

$? is a special variable that is internal to the BASH interpreter. It is used to hold the exit code of the previously executed command or function (or even the script itself).

Example:

#!/bin/bash

/bin/true
echo $? #prints 0

/bin/false
echo $? #prints 1

/bin/foobar
res=$?
if [ $res -ne 0 ]
then
  echo "Command foobar failed to execute or exited with a non-zero status: $res"
else
   echo "Command foobar exited successfully"
fi

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