2011年JAVA认证模拟题第二阶段（16）

会计考友

　　Q46.What is the output of the following piece of code　　1. int x = 6;
　　2. double d = 7.7;
8 Q5 n2 W$ m" e: V　　3. System.out.println((x>d) ? 99.9 ： 9);
　　a. 9
+ l$ h6 B, R1 q; p9 J. X+ J! Z+ m　　b. 9.0
8 [6 J4 _4 |7 c' K$ O! A　　c. 99.9
, s5 V$ U. O7 V. }　　d. Nothing, an ArithmeticException is thrown at line 3.
　　Q47.Which of the following are legal methods for the String class ?
; R2 p7 M& I; ~9 V/ t  {; l+ u. R( F　　a. length()
　　b. toUpper()
; L5 d4 J: q9 ^! g+ x9 M　　c. toUppercase()
, T- ^, r. `& y! {, ~, s　　d. equals()
7 L$ m0 ]( t$ N3 e　　Q48.Consider the following
; W5 J/ u; ^3 l; g　　1. class A extends Integer {
' l, S( M" A9 \+ @. N' P! X7 U& [　　2. int x = 0;
　　3. ｝
' i2 y. r# ~+ N; Z: x( e4 }2 b6 L　　a. The code will compile correctly.
8 c3 H3 R" x) q( V　　b. The code will not compile because Integer class is final.
8 P2 u. ^6 H8 O. r  p1 f　　c. The code will not compile because A class doesn't have a constructor.
: o, L4 S" i2 ~　　d. The code will compile but an ArithmeticException at runtime.
　　46. b
$ |0 M! Y) @! c9 [; {; Z　　47. ad
　　48. b