Which of the following is wrong about the description of the program optimization of ARM C（）
A. It can analyze the running time of the program
B. It can guide assembly program design
C. It can analyze whether the program is efficient
D. It can guide C programming design
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Which of the following is wrong about the description of pointer aliasing（）
A. Try to avoid using pointers
B. Using Pointers may reduce program efficiency
C. The compiler cannot recognize the pointer aliasing
D. When using bit fields, we should pay attention to pointer aliasing
Which of the following is not a feature of ‘shell’（）
A. It’s a low-level interface to the operating system
B. You can type shell commands from the console
C. You can write shell scripts
D. Linux supports multiple ‘shell’
Which of the following is wrong about the description of embedded system（）
A. It can solve certain problems
B. It is no different from general-purpose computers in the nature of technology
C. It has more powerful functions than general-purpose computers
D. It has strict requirements on volume, power consumption, reliability and cost
Which is the advantage of using embedded operating system（）
A. The system runs faster
B. The system has higher execution efficiency
C. Application softwares run faster
D. Programmers can focus on problems
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