The characteristics of Linux do not include（）
A. Micro kernel
B. Meet the POSIX standard
C. It can run on the server
D. It can run on embedded devices
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Which of the following is correct about the description of loop optimization is（）
A. Change the loop variable by using the plus count
B. Change the loop variable by using the minus count
C. ’while’ should be used when the number of loops is uncertain
D. Loop unrolling can improve the quality of program
Which of the following is correct about the description of the data type is（）
A. Shorter data types save more storage space
B. Try to use character variables when passing parameters
C. It is most efficient to use integer variables
D. Try to use a short data type in the loop to speed up execution
Which of the following is wrong about the description of the use of C language for “object-oriented programming”（）
A. It can implement better program structure
B. It can effectively organize the display of Chinese characters
C. It can implement the function of some ‘class’
D. It is less efficient in menu design
Which of the following is wrong about the description of the struct（）
A. In a struct, short members are defined first and long members are defined later
B. Struct members should be boundary aligned as much as possible
C. Array elements should be placed at the end of the struct
D. __packet keyword can improve the access speed of the struct
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