求助 再线等! 急!

[robbinliu]

答案 5 In Oracle,When you change a parameter value in the parameter file, when will that change takes affect?
1 Immediately after saving the parameter file
2 At the first CHECKPOINT after saving the paramter file
3 When the DBWR finishes writing all the dirty buffers to the disk
4 At the next instance startup


答案 6 How many rollback segments are required for Oracle to startup apart from SYSTEM rollback segment ?
1 Oracle can start with just the system rollback segment
2 Oracle Needs atleast 3 rollback segments before it can start
3 Oracle Needs a Temp Rollback Segment before it can start
4 None of the above


答案 7 Consider the following class defiition:（Java Code）
1. public class Test extends Base{
2. public Test(int j){
3. }
4. public Test(int j,int k){
5. super(j,k);
6. }
7. }
Which of the following forms of construtor must exist explicitly in the definiation of the Base class?
1 Base(){}
2 Base(int j){}
3 Base(int j,int k){}
4 Base(int j,intk,int i){}


答案 8 In the code below(Java),what are the possible types for variable result?(Choose the ost complete true answer)
1. byte b = 11;
2. short s = 13;
3. result =b*++s;

1 byte,short,in,long,float,double
2 boolean,byte,short,chart,int,long,float,double
3 byte,short,char,int,long,float,double
4 byte,short,char
5 int,long,float,double


答案 9 True or false: A thread wants to make a second thread ineligible for execution.To do this,the first thread can call the yield() method on the second thread
1 True
2 False


答案 10 Consider the following Java code:
int[] x = new int[25];
After execution,which of statement or statements are true?
1 x[24] is 0
2 x[24] is undefined
3 x[25] is 0
4 x[0] is null
5 x.length is 25

[rolandzhang]

5 3.
6 2.
7 2.

[njhart2003]

5 4
6 1