2015恆生電子校招筆試題

一、不定項選擇題

1、B  C錯是因為編譯后還需要鏈接，D函數可以單獨編譯，編譯成目標文件

2、

3、D

4、CD

5、

6、B

7、

（1）C

（2）A

8、D

9、

10、ABCD

 

二、JAVA語言部分

1、B

2、C

3、AB  char型用'\u四位的16進制'表示也是正確的

4、AB

5、AB,B

 

 

三、數據庫

create table S(
    Sno int primary key auto_increment,
    Sname varchar(20)

);

insert into S(sname) values('he');
insert into S(sname) values('wang');

create table C(
    Cno int primary key auto_increment,
    Cname varchar(20),
    Ccredit int
);


insert into C(cname,Ccredit) values('JAVA',3);
insert into C(cname,Ccredit)  values('C',2);

Drop table if exists SC;
create table SC(
    id int primary key auto_increment,
    Sno int,
    Cno int,
    Grade int
);


insert into SC(Sno,cno,Grade) values(1,1,100);
insert into SC(Sno,cno,Grade) values(1,2,90);
insert into SC(Sno,cno,Grade) values(2,1,80);
insert into SC(Sno,cno,Grade) values(2,2,70);
insert into SC(Sno,cno,Grade,Teacher) values(3,1,80,'zhang');
insert into SC(Sno,cno,Grade,Teacher) values(3,2,70,'zhang');

1)select distinct Sname From S,SC,C where S.sno = SC.sno and c.Cno = SC.cno and
Cname='JAVA' order by Sname desc;

2)select S.Sno,Sum(Ccredit) From S,SC,C where S.sno = SC.sno and c.Cno = SC.cno

and Grade>60 group by Sno having sum(Ccredit)>80;

3)ALTER table SC ADD Teacher varchar(20) not null;

4)CREATE VIEW SCSum(sno,Ccredit) as Select S.Sno,Sum(Ccredit)  From S,SC,C

where S.sno = SC.sno and c.Cno = SC.cno group by Sno;  

5)delete from SC where sno not in(select distinct S.Sno from S);

 

四、編程題

1、

package hengsheng;

import java.util.Scanner;

public class Exe3 {
    public static void main(String[] args) {
        Date date = new Date(2015,8,25);
        System.out.println(days(date));
    
    }

    static int days(Date date){
        int day = 0;
        int[][] month = new int[][]{{31,28,30,31,30,31,31,31,30,31,30,31},{31,29,30,31,30,31,31,31,30,31,30,31}};
        int m = isrunYear(date.getYear());
        for(int i=0;i<date.getMonth()-1;i++){
            day += month[m][i];
        }
        day += date.getDay();
        return day;
    }
    
    static int isrunYear(int year) {
        if (year % 4 == 0 && year % 100 != 0 | year % 400 == 0)
            return 0;
        return 1;
    }
}

class Date {
    int year;
    int month;
    int day;

    
    public Date(int year, int month, int day) {
        super();
        this.year = year;
        this.month = month;
        this.day = day;
    }

    public int getYear() {
        return year;
    }

    public void setYear(int year) {
        this.year = year;
    }

    public int getMonth() {
        return month;
    }

    public void setMonth(int month) {
        this.month = month;
    }

    public int getDay() {
        return day;
    }

    public void setDay(int day) {
        this.day = day;
    }

}

 

2、

package hengsheng;

import java.util.Scanner;

public class Exe2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        while (n != 1) {
            for (int i = 2; i<=n; i++) {
                if (isPrime(i)) {                    
                    // 如果i為素數
                    if (n % i == 0) {
                        // 如果n能被i整數
                        n = n / i;
                        System.out.print(i + " ");
                        break;
                    }
                }
            }
        }
    }

    /**
     * 判斷是否是素數
     * 
     * @param num
     * @return
     */
    static boolean isPrime(int num) {
        for (int i = 2; i <= num / 2; i++)
            if (num % i == 0)
                return false;
        return true;
    }

}