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I am Lyosha [343]
3 years ago
13

Explain what a surrogate key is.

Computers and Technology
1 answer:
Irina18 [472]3 years ago
4 0

answer - surrogate key is a unique identifier used in databases for a modeled entity or an object. It is a unique key whose only significance is to act as the primary identifier of an object or entity and is not derived from any other data in the database and may or may not be used as the primary key.

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Which statement opens a text file so that you can retrieve the information it contains?
vesna_86 [32]

Answer:

Answered below

Explanation:

aFile = open("books.txt", "r")

This code uses the function open() which takes two parameters. The first parameter is the file name while the second parameter is the mode in which you are accessing the file.

The "r" mode opens the file in a reading state. That is, you can only read from the file. This code completes the reading process

aFile.read( )

The "w" mode opens the file so you can write to it and make changes.

The "a" mode opens the file so you can add contents to it.

3 0
3 years ago
The ____ is the ranking executive on-site when the crisis or emergency arises, who is authorized to initiate the CM plan.
aleksklad [387]

The answer is the Executive-in charge

The concept of an Executive-in charge came from the military’s chain of command. A chain of command ranges from a supervisor to the top executive of the organization. When a crisis arises, it is possible that one or more of the senior top managers may not be available for consultations because of the travel-intensive positions.






7 0
3 years ago
Read 2 more answers
True or False? To use a C++ library function, you must use an #include directive to include the appropriate header file.
lakkis [162]

Answer:

True

Explanation:

While programming in most programming languages, one will have need to use functions and variables defined in other class libraries. in C++, these functions and variables' definitions are contained in Header files, which can be imported and used into any C++ program by using the pre-processor #include statement. This statement is the equivalent of import in java and copy in other languages. Popular header files are the Maths class (Allows use of maths functions like power, square roots exponentiation etc), the input/output (allows usage of cout print statement and cin input statement)

7 0
3 years ago
Technician A says that the purpose of the electrolyte is to allow the escape of hydrogen gas from the battery. Technician B says
kifflom [539]

Answer:

D. Neither Technician A nor B.

Explanation:

D. Neither Technician A nor B.

The electrolyte is a chemical medium that allows the flow of electrical charge between the cathode and anode. When a device is connected to a battery — a light bulb or an electric circuit — chemical reactions occur on the electrodes that create a flow of electrical energy to the device.  

7 0
4 years ago
Risks for standing up for the one who is being bullied
Afina-wow [57]
You, in turn, might end up getting hurt or bullied.
3 0
3 years ago
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