德尔福笔试（软件类）
德尔福笔试（软件类）
德尔福软件方向的笔试题１．How do you code an infinite loop in C?2. Volatile：a) What does the keyword volatile mean? Give an exampleb) Can a parameter be both const and volatile? Give an examplec) Can a pointer be volatile? Give an example3. What are the values of a, b, and c after the following instructions:int a=5, b=7, c;c = a+++b;4, What do the following declarations mean?a) const int a;b) int const a;c) const int *a;d) int * const a;e) int const * a const;5. Which of the following statements describe the use of the keyword static?a) Within the body of a function: A static variable maintains its value between function revocationsb) Within a module: A static variable is accessible by all functions within that modulec) Within a module: A static function can only be called by other functions within that module6. Embedded systems always require the user to manipulate bits in registers or variables. Given an integer variable a, write two code fragments.The first should set bit 5 of a. The second shnuld clear bit 5 of a. In both cases, the remaining bits should be unmodified.7. What does the following function return?char foo(void){unsigned int a = 6;iht b = -20;char c;(a+b > 6)? (c=1): (c=0);return c;}8. What values are printed when the following C program is executed?int i = 8;void main(void)(9. What will be the output of the following C code?main(){int k, num= 30;k =(num > 5? (num <=10? 100:200): 500);printf("%d", k);}10. What will the following C code do?int *ptr;ptr =(int *)Ox67a9;ptr = Oxaa55;11. What will be the output of the follow C code?define product(x) (x*x)main(){int i = 3, j, k;j = product(i++);k = product(++i);printf("%d %d",j,k);}12. Simplify the following Boolean expression!((i ==12) || (j > 15))13. How many flip-flop circuits are needed to divide by 16?14. Provides 3 properties that make an OS, a RTOS?15. What is pre-emption?16. Assume the BC register value is 8538H, and the DE register value is 62A5H.Find the value of register BC after the following assembly operations:MOV A,CSUB EMOV C,AMOV A,BSBB DMOV B,A17.In the Assembly code shown belowLOOP: MVI C,78HDCR CJNZ LOOPHLTHow many times is the DCR C Operation executed?18.Describe the most efficient way(in term of execution time and code size) to divide a number by 4 in assembly language相关推荐：
