软件专业学生应聘笔试题目

  1. Describe the most efficient way (in term of execution time and code size) to divide a number by 4 in assembly language

  2. what value is stored in m in the following assembly language code fragment if n=7?

  LDAA #n

  LABEL1: CMPA #5

  BHI L3

  BEQ L2

  DECA

  BRA L1

  LABEL2: CLRA

  LABEL3: STAA #m

  3. What is the state of a process if a resource is not available?

  #define a 365*24*60*60

  4. Using the #define statement, how would you declare a manifest constant that returns the number of seconds in a year? Disregard leap years in your answer.

  5. Interrupts are an important part of embedded systems. Consequently, many compiler vendors offer an extension to standard C to support interrupts. Typically, the keyword is __interrupt. The following routine (ISR). Point out problems in the code.

  __interrupt double compute_area (double radius)

  {

  double area = PI * radius * radius;

  printf(“\nArea = %f”, area);

  return area;

  }

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