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愛立信常考的筆試真題

  選擇題


  1:異步復(fù)接二次群一幀中的插入標(biāo)志碼有

  a.4 bit

  b.6~7 bit

  c.12 bit

  d.最多28 bit

  2:條件轉(zhuǎn)移指令jnbe產(chǎn)生轉(zhuǎn)移的條件是

  a.cf=0 and zf=0

  b.cf=0 and zf=1

  c.cf=1 and zf=0

  d.cf=1 and zf=1

  2cm零次群速率為。

  a.8kb/s

  b.16kb/s

  c.32kb/s

  d.64kb/s

  3:array dw 6, 9, $+4, 10h, 1,$+4

  ┇

  mov ax, array+4

  設(shè)變量array的偏移量是0084h,上述指令執(zhí)行后ax中的內(nèi)容是

  a.0009

  b.008ch

  c.0090h

  d.0010h

  4:表示過程定義結(jié)束的偽指令是

  a.endp

  b.ends

  c.end

  d.endm

  5:數(shù)字光纖傳輸系統(tǒng)屬于

  a.基帶傳輸

  b.頻帶傳輸

  c.數(shù)字?jǐn)?shù)據(jù)傳輸

  d.無線傳輸

  7:設(shè)非壓縮bcd碼al=09h,bl=04h在執(zhí)行sub al,bl指令后應(yīng)選的校正指令是

  a.daa

  b.aas

  8.C++類筆試題

  求輸出的結(jié)果

  #include

  using namespace std;

  class base

  {

  public:

  void func(const char* str){cout << "base: " << str << endl;}

  virtual void func(int num){cout << "base: " << num << endl;}

  };

  class derived : public base

  {

  public:

  void func(const char* str){cout << "derived: " << str << endl;}

  void func(int num){cout << "derived: " << num << endl;}

  void func(){cout << "the function is in derived!" << endl;}

  };

  int main()

  {

  base *pb;

  derived objd;

  pb = objd;

  pb->func(11);

  pb->func("hello");

  // pb->func();

  getchar();

  return 0;

  }

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