83. If the line:
friend class A；
appears in class B, and the line:
friend class B；

appears in class C, then:
(A) Class A is a friend of class C.
(B) Class A can access private variables of class B.
(C) Class C can access private variables of class B.
(D) Class C can call class A's private member functions.
(E) Class B can access class A's private variables.

79. Assume this code fragment is embedded in an otherwise correct and complete program. What should be the output from this code segment? (A)5(B)4(C)6(D) 0 (E) The variable i is undefined in this scope

80. Consider the following C code fragment: int x=38； int *p=&x；Which of the following code will output 38? (A) printf("%d" , (B) printf("%d" , *&p) ； (C) printf("%d" , *&x) ； (D) printf("%d" , &*x)； (E) None of the above

81. Which of the following C statements is incorrect? (A) typedef enum {Spade, Heart, Diamond, Club }； (B) typedef enum {Spade, Heart, Diamond, Club }Suit； (C) enum{Spade, Heart, Diamond, Club } suit； (D) enum suit {Spade, Heart, Diamond, Club }； (E) None of the above

82. Suppose the output of the following C code fragment is 0xffff00003a04: int x=38； int *p=&x；printf("%p", p)；What is the output of 「printf("%p" , p+3) ；」 ? (A) 0xffff00003a04 (B)0xffff00003a07 (C) 0xffff00003a10 (D) 0xffff00003a16 (E) None of the above

84. Since the postfix increment operator returns objects by value and the prefix increment operator returns objects by reference: (A) Prefix increment has slightly more overhead than postfix increment. (B) The postfix increment operator returns the actual incremented object with its new value. (C) Objects returned by postfix increment cannot be used in larger expressions. (D) Postfix increment cannot be used in larger expressions. (E) The postfix increment operator typically returns a temporary object that contains the original value of the object before the increment occurs.

85. virtual destructors must be used when: (A) The constructor in the base class is virtual. (B) delete is used on a base-class pointer that points to a derived-class object. (C) delete is used on a derived-class object. (D) Every member function of the base class is virtual . (E) Every data member of the base class is virtual .

86. What should be filled in the following blanks if we want to print {0 : [90, 'Alice'] ,1 : [87, 'Bob' ] ,2 :[93, 'Apple' ] }in this Python code? (A) z[i]=[x[i] ,y[i]] (B)z[i]=x[il,y[i] (C)z[ij=list(zip(x,y)) (D) z[i]=x,y (E) None of these

87. What is the output of the following Python code? print(I(a,b) for a in range(3) for b in range(a)]) (A)[(1,0),(2,0),(2,1)] (B)[(0,0),(1,1),(2,2)] (C) [(1,0), (2,1), (2,1)1 (D)[(1,0), (2,1), , (3,2) ] (E)[(1,0),(2,1),(2,2)1

88. Consider the recursive function,   Which of these expressions could replace a call to this function? (A)n2 (B) n2+n+1 (C) n! (D) (n+ 1)2 (E) (n -1)2

89. Consider the following C code fragment: What output will be generated? (A) leeHH (B) olleH (C) oolHH (D) Hello (E) None of the above