Answer:
Explanation:
Let G denote an unambiguous Grammar capable of producing simple mathematical expressions, involving operators +,-,*,/. These operators are left associative (which ensures left to right evaluation). S is the start symbol of the Grammar i.e. the production starts from S. n denotes a number and is a terminal i.e. we can't produce anything further from n. Then, the solution is as follows :
S → S + T |S - T | S
T→T | F | T*F|F
F → n
Here, S, T and F are variables. Note that /,* have been given precedence over +,-.
When a program lets the user know that an invalid choice has been made, this is known as a error message.
Answer:
"Security Kernel" is the correct answer for the above question.
Explanation:
- Security Kernel is a part of the kernel which is present in the operating system. The work of kernel is to manage the resource, boot the operating system and the other work.
- The security kernel is used to secure or control the access of the software and the hardware from the other source and the user which can access the computer for the wrong purpose.
- The above question asked about the central part of the operating system which is used to control access. This part is known as "Security Kernal".
