Student类中存在String类型name属性,下列Student类的构造方法中,哪个是正确的? A: Student(String name){} B: Student(String name) C: Student(name)() D: NewStudent (String name){}
Student类中存在String类型name属性,下列Student类的构造方法中,哪个是正确的? A: Student(String name){} B: Student(String name) C: Student(name)() D: NewStudent (String name){}
以下代码中,实例方法定义正确的是() A: class Student: def setName(self,name): self.name=name B: class Student: def setName(name): self.name=name C: class Student: def setName(self): self.name=name D: class Student: def setName(name,self): self.name=name
以下代码中,实例方法定义正确的是() A: class Student: def setName(self,name): self.name=name B: class Student: def setName(name): self.name=name C: class Student: def setName(self): self.name=name D: class Student: def setName(name,self): self.name=name
下面哪个是合法的序列化数据格式?() A: O:7:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";s:25;} B: O:7:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";i:25;} C: O:8:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";s:25;} D: O:8:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";i:25;}
下面哪个是合法的序列化数据格式?() A: O:7:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";s:25;} B: O:7:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";i:25;} C: O:8:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";s:25;} D: O:8:"Student":2:{s:4:"name";s:4:"qian";s:3:"age";i:25;}
下面程序的输出结果是________ #include "stdio.h" main() {int iX=3; switch(iX) { case 1: case 2: printf("iX<3 "); case 3: printf("iX=3 "); case 4: case 5: printf("iX>3 "); default: printf("iX unknow "); } }
下面程序的输出结果是________ #include "stdio.h" main() {int iX=3; switch(iX) { case 1: case 2: printf("iX<3 "); case 3: printf("iX=3 "); case 4: case 5: printf("iX>3 "); default: printf("iX unknow "); } }
表student中的包含两个字段,整型的id,字符串型的name。只显示表student中name列记录的SQL语句正确的是() A: select name from student B: select * from student C: select from name in student D: select name
表student中的包含两个字段,整型的id,字符串型的name。只显示表student中name列记录的SQL语句正确的是() A: select name from student B: select * from student C: select from name in student D: select name
下面哪一个是JSON数据?() A: {name:"xiaoming",age,"student"} B: {"name":"xiaoming","age":"student"} C: {"xiaoming","student"} D: ["xiaoming","student"]
下面哪一个是JSON数据?() A: {name:"xiaoming",age,"student"} B: {"name":"xiaoming","age":"student"} C: {"xiaoming","student"} D: ["xiaoming","student"]
若想查询student表中name为空值的记录,则正确的SQL语句是( )。 A: SELECT * FROM student WHERE name = NULL; B: SELECT * FROM student WHERE name like NULL; C: SELECT * FROM student WHERE name = 'NULL'; D: SELECT * FROM student WHERE name is NULL;
若想查询student表中name为空值的记录,则正确的SQL语句是( )。 A: SELECT * FROM student WHERE name = NULL; B: SELECT * FROM student WHERE name like NULL; C: SELECT * FROM student WHERE name = 'NULL'; D: SELECT * FROM student WHERE name is NULL;
若想查询student表中name为空值的记录,则正确的SQL语句是(1.0分) A: select * from student where name = null; B: select * from student where name link null; C: select * from student where name = 'null'; D: select * from student where name is null;
若想查询student表中name为空值的记录,则正确的SQL语句是(1.0分) A: select * from student where name = null; B: select * from student where name link null; C: select * from student where name = 'null'; D: select * from student where name is null;
以下变量定义,错误的是: A: struct student{int num, char name[20];} s; B: struct {int num, char name[20];} s; C: struct student{int num, char name[20];}; struct student s; D: struct student{int num, char name[20];} ; student s
以下变量定义,错误的是: A: struct student{int num, char name[20];} s; B: struct {int num, char name[20];} s; C: struct student{int num, char name[20];}; struct student s; D: struct student{int num, char name[20];} ; student s
下列声明结构体变量错误的是( ) A: A.struct student { int no; char name[16]; }st1,st2; B: B. struct student{ int no;char name[16];};struct student st1,st2; C: C.struct student { int no; char name[16]; }; struct st1,st2; D: D.struct student{ int no;char name[16]; };student st1,st2;
下列声明结构体变量错误的是( ) A: A.struct student { int no; char name[16]; }st1,st2; B: B. struct student{ int no;char name[16];};struct student st1,st2; C: C.struct student { int no; char name[16]; }; struct st1,st2; D: D.struct student{ int no;char name[16]; };student st1,st2;