All categories

3 years ago

Why was 1990 an important year regarding air quality?

Computers and Technology

2 answers:

qaws [65]3 years ago

7 0

Answer:

It's C

Explanation:

fredd [130]3 years ago

4 0

Explanation:

The United States created the Environmental Protection Agency. in some ways they have did that

You might be interested in

What part of speech is contend

Amiraneli [1.4K]

Assuming the context, it would be considered a verb.

ie: "She contended to me that I was not acting maturely."

7 0

3 years ago

Express the following binary numbers in hexadecimal. (a) %100011100101 (b) %1011001111 (show work)

Lapatulllka [165]

Answer:

$(100011100101)_{2} = (8E5)_{16} = %8E5$

$(1011001111) = (2CF)_{16} = %2CF$

Explanation:

Binary and hexadecimal values have the following pair equivalences.

$(0000)_{2} = (0)_{16}$

$(0001)_{2} = (1)_{16}$

$(0010)_{2} = (2)_{16}$

$(0011)_{2} = (3)_{16}$

$(0100)_{2} = (4)_{16}$

$(0101)_{2} = (5)_{16}$

$(0110)_{2} = (6)_{16}$

$(0111)_{2} = (7)_{16}$

$(1000)_{2} = (8)_{16}$

$(1001)_{2} = (9)_{16}$

$(1010)_{2} = (A)_{16}$

$(1011)_{2} = (B)_{16}$

$(1100)_{2} = (C)_{16}$

$(1101)_{2} = (D)_{16}$

$(1110)_{2} = (E)_{16}$

$(1111)_{2} = (F)_{16}$

We convert from binary to hexadecimal selecting groups of 4 binary from the binary code, from the least significant bits(at the right) to the most significant bits(at the left). The conversion is an hexadecimal "string" from the last group you converted to the first. So:

(a) %100011100101

$(0101)_{2} = (5)_{16}$

$(1110)_{2} = (E)_{16}$

$(1000)_{2} = (8)_{16}$

$(100011100101)_{2} = (8E5)_{16}$

(b) %1011001111

$(1111)_{2} = F_{16}$

$(1100)_{2} = C_{16}$

$(10)_{2} = (0010)_{2} = 2_{16}$

$(1011001111) = (2CF)_{16}$

7 0

3 years ago

Which of the following refers to the informal rules for how to behave online?

Feliz [49]

Answer:

Question: Where is the following?

3 0

3 years ago

Read 2 more answers

Many who move to business-oriented information security were formerly__________ who were often involved in national security or

kirill [66]

Answer:

The information security function

Explanation:

Many who move to business-oriented information security were formerly_____ who were often involved in national security or cybersecurity . All of the above The information security function

5 0

2 years ago

Define the following terms: data model, database schema, database state, internal schema, conceptual schema, external schema, da

PolarNik [594]

Answer:

Following are the solution to the given terms:

Explanation:

Data Model: A set of concepts that are ideal for describing the layout, computational tools, relations, semantics, constraints on accuracy.

Database Scheme: It is also known as the overall design of the database.

Database State: It is the data in the database at a particular moment in time.

Internal Schema: The physical structure of the database is defined.

Conceptual Schema: It hides the details of physical storage.

External Schema: It describes the part of the database the user group sees. In other words, we can say that it is a view of the database.

Data Independence: The ability to modify the schema at a single level while modifying the schema at a higher level is often recognized.

DDL: It stands for the Data Definition Language, which is used by DBA and dev use for creating With particular scheme.

DML: It refers to the Data Manipulation Language, which is used to manipulate, add, recover, insert, remove, and alter data.

SDL: It stands for the storage definition language, in which the internal schema of the database is applied for storage description.

VDL: The view definition language specifies the user to view and mapping their conceptual schema.

Query Language: It is just an independent, dynamic, high-level dialect used during manipulation.

Host Language: It is also the machine language, that would be incorporated into the general programming language by low-level data handling commands.

Data sublanguage: It uses for embedding in the last language.

Database Utility: It is a program, which helps to handle the database with DBA's modules.

Catalog: The entire structure and constraints of the database is defined.

client/server architecture: The design of the database server system that device usability: model user, model server (landless storage) software Government computer design in which many users (remote processors) demand a central server to receive service (host computer).

Three-tier architecture: It is the application, data, user interface.

n-tier architecture: multiple levels. The nth level must only be able to handle the n+1 application and transmit it to the n-1 point.

3 0

3 years ago