The line of code required to assign a value of 50.00 to a variable of double data type in C++ can be written thus :
- double average_student_grade = 50.00;
The declaration follows the format :
- Data type
- Variable name
- Value
The data type which is first stated, the double data type are floating point (have decimals) numbers which have 64 bit precison(a precison of 15 decimal digits) as opposed to floats which have 32 bit precison (a precison of 7 decimal digits).
The variable name is the name to hold the value of average grade. This name depends on the preference of the programmer. However. It is advisable that variable names are relatable.
Therefore, variable declaration in C++ may follow the format data type then variable name then value.
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Answer:
Physical layer
Explanation:
OSI model stands for Open Systems Interconnection. The seven layers of OSI model architecture starts from the Hardware Layers (Layers in Hardware Systems) to Software Layers (Layers in Software Systems) and includes the following;
1. Physical Layer
2. Data link Layer
3. Network Layer
4. Transport Layer
5. Session Layer
6. Presentation Layer
7. Application Layer
Each layer has its unique functionality which is responsible for the proper functioning of the communication services.
In the OSI model, the physical layer is the first and lowest layer. Just like its name physical, it addresses and provides information about the physical characteristics such as type of connector, cable type, length of cable, etc., of a network.
This ultimately implies that, the physical layer of the network (OSI) model layer provides information about the physical dimensions of a network connector such as a RJ45. A RJ45 is used for connecting a CAT-5 or CAT-6 cable to a networking device.
Answer:
All of the mentioned views could be looked as an additional layer in the table which enables us to protect intricate or sensitive data based upon our needs.
Explanation:
View is a virtual table which executed a pre compiled query. It is a table in which selective portion of the data can be seen from one or more tables. Queries are not allowed in indexed views and adding column is not possible. Views can be looked as an additional layer in the virtual table which protects sensitive data.
