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3 years ago

Which of the following is CORRECT about database managementsystem's languages?

Computers and Technology

1 answer:

scZoUnD [109]3 years ago

3 0

Answer:

Data manipulation languages are used for the retrieval of the,insertion,deletion and modification of data.

Explanation:

Data Manipulation Languages(DML) are used to insert,delete,update,modify the data in the database.

The commands used to do these operations are as following:-

INSERT INTO :-This command is used to insert values in the database.

DELETE:-It is used to delete existing records from the table.

UPDATE:- It is used to modify the records in the table.

SELECT:- It is used to select data from database.

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Provide all resonance structures of the sigma complex when aniline reacts with an electrophile to yield the para-substituted pro

Nadya [2.5K]

Answer:

See attached picture.

Explanation:

See attached picture for detailed explanation.

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3 years ago

You have a MySQL database running on an EC2 instance in a private subnet. You can connect via SSH, but you are unable to apply u

AnnZ [28]

Answer:

Ensure that "Source/Destination Checks" is disabled on the NAT instance.

Explanation:

A NAT (Network Address Translation) instance is, like a bastion host, an EC2 instance that lives in your public subnet. A NAT instance, however, allows your private instances outgoing connectivity to the internet while at the same time blocking inbound traffic from the internet.

Many people configure their NAT instances to allow private instances to access the internet for important operating system updates. Patching your OS is an important part of maintaining instance level security.

NAT device enables instances in a private subnet to connect to the Internet or other AWS services, but prevents the Internet from initiating connections with the instances.

NAT devices do not support IPv6 traffic, use an egress-only Internet gateway instead.

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3 years ago

What happens during an Active object's animation sequence action?

RoseWind [281]

Answer:

B. The Active object's animation stops looping.

Explanation:

As the new event happens, the loop tells it to happen by stopping. And hence, B is the correct option out here. Neither A or C and Nor D is the correct option. The animation does not end here, and the next event takes place. Also, the active object's animation does not change the speeds. Hence, the correct option here is certainly the B.

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3 years ago

Yesterday you installed a new game on your computer. When you ran the computer, you noticed that the application was running ver

Nady [450]

Since I have rechecked and noticed that it is not a disk space shortage, then the problem should not be on the disk but the RAM. Even basic tasks like opening up a Word document can be slow if you do not have enough RAM. You can check RAM usage in task manager by right clicking on the taskbar and selecting the task manager option. You will be required to click on the Performance tab of the task manager. Here, you will be able to graphically view how much RAM on your computer is being used. If the RAM is being over-utilized, you will have to consider upgrading your PC with more RAM.

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3 years ago

g Boolean Algebraic properties _____. a. are used to make boolean expressions more complicated b. are used to convert a Boolean

vesna_86 [32]

Answer:

c. can lead to a simpler expression and thus a simpler circuit.

Explanation:

Boolean logic refers to a theory of mathematics developed by the prominent British mathematician, called George Boole. In Boolean logic, all variables are either true or false and are denoted by the number "1" or "0" respectively; True = 1 or False = 0.

Also, Boolean logic allow users to combine keywords with Boolean operators (quotes, AND, OR, near/n) to give a more personalized and relevant search results.

There are five (5) main Boolean Algebraic properties and these includes;

I. Commutative property: it applies to both multiplication and addition.

For addition; A + B = B + A
For multiplication; A.B = B.A

II. Associative property: it applies to both multiplication and addition.

For addition; A + (B + C) = (A + B) + C
For multiplication; A(BC) = (AB)C

III. Distributive property: it is formed using the product of a sum.

A(B + C) = AB + AC

IV. Complement property: it involves a variable and its complement.

For addition: A + A' = 1
For multiplication; A.A' = 0

V. Identity property:

For addition; A + 0 = A
For multiplication; A.1 = A

In digital electronics, Boolean expressions are used to represent circuits which comprises of Boolean operations and as such simplifying any logic expression without changing or altering any of it's functionalities and properties based on given operations or variables.

Hence, Boolean Algebraic properties can lead to a simpler expression and thus a simpler circuit.

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2 years ago