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Monday, February 18, 2019

In VMware vSphere, the term VMotion refers to

In VMware vSphere, the term VMotion refers to

  • the use of high definition video on a virtual machine.
  • the process used to describe the movement of hard drive platters on a virtual machine.
  • a zero downtime live migration of workloads from one server to another.
  • the patented technology available to migrate a server from Hyper-V to VMware. 

In VMware vSphere, the term VMotion refers to

EXPLANATION


VMware vSphere live migration allows you to move an entire running virtual machine from one physical server to another, with no downtime. The virtual machine retains its network identity and connections, ensuring a seamless migration process. Transfer the virtual machine’s active memory and precise execution state over a high-speed network, allowing the virtual machine to switch from running on the source vSphere host to the destination vSphere host. This entire process takes less than two seconds on a gigabit Ethernet network. Live migration allows you to:

  • Automatically optimize virtual machines within resource pools.
  • Perform hardware maintenance without scheduling downtime or disrupting business operations.
  • Move virtual machines away from failing or underperforming servers. 

SOURCE

http://www.vmware.com/products/vsphere/vmotion.html
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Friday, February 15, 2019

What type of user mode is the default in SQL Server?

What type of user mode is the default in SQL Server?

  • MULTI_USER
  • RESTRICTED_USER
  • ROOT_USER
  • SINGLE_USER 

 
What type of user mode is the default in SQL Server?

EXPLANATION

Following are the three possible different user access modes in Sql server:
i) SINGLE_USER Database Access Mode
In SINGLE_USER access mode at any given point of time only one user can access the database. The user can be any user who has access to the database.
Note: Before setting the database to Single user mode make sure to STOP the sql server agent or see if any AUTO_UPDATE_STATISTICS_ASYNC option is set to OFF. Otherwise the Sql Server Agent or the background thread which updates the stats may utilize the only allowed connection.
ii) RESTRICTED_USER Access Mode

In RESTRICTED_USER access mode only the users who have db_owner or db_creator permission can access. Users who belong to the sysadmin fixed server role can also access the database which is in RESTRICTED_USER access mode.
At any given point of time ZERO or Many user can access the database as long as they have specified permission as mentioned previously.
iii) MULTI_USER Access Mode
This is the default database user access mode. In this database user access mode any user who have permission to access the database can access the database.

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Thursday, February 14, 2019

Which name below is not usually another name for "nibble" in computing & networking?

Which name below is not usually another name for "nibble" in computing & networking?

  • tetrad
  • quartet
  • quadbit
  • quaddigit 

Which name below is not usually another name for "nibble" in computing & networking?

EXPLANATION

A "nibble" contains 4 digits, as opposed to a "bit" containing 1 digit or a "byte" containing 8 digits. All of the above except "quaddigit" references or are other names for nibble. The most
common reference to quad-digit in technology are 4 position timers, like an oven displaying the time or countdown timer.

SOURCE

https://en.wikipedia.org/wiki/Nibble
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Tuesday, February 12, 2019

Typing the Following "ALT Codes" (ie. in "Notepad") will make what happen? Choose the TRUE answer. Note: These are decimal numbers from the keypad in NUM lock mode.

Typing the Following "ALT Codes" (ie. in "Notepad") will make what happen? Choose the TRUE answer. Note: These are decimal numbers from the keypad in NUM lock mode.

  • ALT+255 makes the same character as pressing the Spacebar
  • ALT+022 Pastes whatever's in the buffer
  • ALT+008 creates a horizontal tab
  • ALT+013 makes a pagebreak 
Typing the Following "ALT Codes" (ie. in "Notepad") will make what happen? Choose the TRUE answer. Note: These are decimal numbers from the keypad in NUM lock mode.

EXPLANATION

ALT+022 does paste whatever characters you may have previously cut or copied.
ALT+255 make a character that "looks" like a space, but is not.  For fun, from command prompt, add ALT+255 to a directory name.  Then, try to DIR to it using the Spacebar!
ALT+008 Backspaces
ALT+013 is a Carriage Return
Here is a decent list of ASCII characters and their original functions:
https://en.wikipedia.org/wiki/ASCII
The control characters have also been imported to WIndows-1252:
https://en.wikipedia.org/wiki/Windows-1252
and Unicode:
https://en.wikipedia.org/wiki/List_of_Unicode_characters
While some of them may not work, you might be surprised how many do.  Especially when someone doesn't include them in a web form's regular expression to block them ;)  Have fun experimenting!

SOURCE

https://en.wikipedia.org/wiki/ASCII
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In Cisco IOS, how do you enter into Privileged EXEC mode?

In Cisco IOS, how do you enter into Privileged EXEC mode?

  • Su
  • Login
  • Exec
  • Enable 

In Cisco IOS, how do you enter into Privileged EXEC mode?

EXPLANATION

Privileged EXEC mode is password protected, and allows the use of all EXEC mode commands available on the system. To enter privileged EXEC mode from user EXEC mode, use the enable command.
Privileged EXEC mode allows access to global configuration mode through the use of the enable command. The privileged EXEC mode prompt consists of the devices's host name followed by the pound sign: Router# .
http://www.cisco.com/c/en/us/td/docs/ios/12_2/configfun/configuration/guide/ffun_c/fcf019.html
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