.............. one second
        
             
        
        
        
Answer: binary
Explanation:
Conceptual design refers to the early phase of the design process, whereby the outlines of function are articulated. The conceptual design consist of the design of processes, interactions, and strategies. It is the first stage in the database design process. 
The output of the conceptual design process describes the main data entities, and constraints of a particular problem domain. To simplify the conceptual design, most higher-order relationships are decomposed into appropriate equivalent binary relationships whenever possible.
 
        
             
        
        
        
Kernal is the core of an operating system that maintains the computer’s clock, starts applications, and assigns the computer’s resources, such as devices, programs, apps, data, and information.
d. kernal.
<u>Explanation:</u>
Every operating system runs the operating system based on kernel instructions. Main or major role of operating system is kernel. If boot loader program fails to load kernel operation is missing the kernel we need to reinstall operating system or repair the operating system.
To display clock in the workstation or laptop or desktop, clock device driver been executed by kernel of operating system.
Kernel is core of any operating system, but kernel also controlled by operating system such as Unix etc.
 
        
             
        
        
        
Answer:
The solution code is written in R script.
- #string variable
- character_str<- "Hello World"
- #logical variable
- logic <-  a > b
- #Missing value
- myVec <-c(1, 2, 3, NA)
- #Use class to check data type
- class(character_str)
- class(logic)
- class(myVec)
Explanation:
A string variable is a variable that hold a string (the letters enclosed within quotation marks) (Line 2)
A logical variable is a variable that hold a logical value (either True or False). The logical value is created by comparing two variables (Line 5).
In R, missing value is an unknown value which is represented by NA symbol (Line 8).  
We can use in-built method <em>class </em> to check for the variable type in R (Line 11-13). For example, the output of <em>class(character_str)</em> is "<em>character</em>"