b.equals(b) returns true.
b.equals(c) returns the same result as b == c.
b.eqials(c) can return false even if c.equals(b) returns true.
b.equals(c) throws an exception if b and c are different wrapper types.
b.equals(c) returns false if the type of wrapper objects being compared are different.
第1题:
在SQL语句中,与表达式“仓库号NOT IN(“wh1”,“wh2”)”功能相同的表达式是
A.仓库号=“wh1”AND仓库号:“wh2”
B.仓库号!=“wh1”OR仓库号:=“wh2”
C.仓库号<>“wh1”OR仓库号!=“wh2”
D.仓库号!=“wh1”AND仓库号!=“wh2”
第2题:
在SQL语句中,与表达式“仓库号NOT IN("whl ","wh2")”功能相同的表达式是A)仓库号="wh1"AND仓库号="wh2"B)仓库号!="whl" OR仓库号="wh2"C) 仓库号<>"wh 1" OR仓库号!="wh2"D)仓库号!="whl" AND仓库号!= "wh2"
第3题:
By presupposition, we refer to a meaning taken as given which does not therefore need to be asserted.()
第4题:
给出在仓库“WHl”或“WH2”工作,且年龄小于40岁的职工号和姓名,正确的命令是( )。
A)SELECT 职工号,姓名 FROM 职工:
WHERE 年龄<40 AND 仓库号=”WH1”OR 仓库号=”WH2”
B)SELECT职工号,姓名 FROM 职工;
WHERE年龄<40 AND(仓库号=”WH1”AND 仓库号=”WH2”)
C)SELECT职工号,姓名 FROM 职工;
WHERE年龄<40 OR 工仓库号=”WH1”OR 仓库号=”WH2”
D)SELECT职工号,姓名 FROM 职工:
WHERE年龄<40 AND(仓库号=”WH1”OR 仓库号=”WH2”)
第5题:
下列SQL语句能实现的功能是( )。 SELECT*FROM 仓库 WHERE 仓库号="WH1"; UNION; SELECT * FROM 仓库 WHERE 仓库号="WH2"
A.查询在WH1或者WH2仓库中的职工信息
B.查询仓库号为WH1或者WH2的仓库信息
C.查询即在仓库号为WH1,又在仓库号为WH2工作的职工信息
D.语句错误,不能执行
第6题:
在SQL语句中,与表达式“仓库号NOT IN("whl","wh2")”功能相同的表达式是 ______。
A.仓库号="wh1" AND仓库号="wh2"
B.仓库号!="wh1"OR仓库号#"wh2",
C.仓库号<>"wh1" OR仓库号!"wh2"
D.仓库号户'whl,tAND仓库号!:”wh2”
第7题:
A.1
B.2
C.3
D.4
第8题:
Given the following directory structure: bigProject |--source | |--Utils.java | |--classes |-- And the following command line invocation: javac -d classes source/Utils.java Assume the current directory is bigProject,what is the result? ()
A.If the compile is successful, Utils.class is added to the source directory.
B.The compiler returns an invalid flag error.
C.If the compile is successful, Utils.class is added to the classes directory.
D.If the compile is successful, Utils.class is added to the bigProject directory.
第9题:
Refer to the exhibit. The routing protocols EIGRP and OSPF have been configured as indicated in the exhibit. Given the partial configuration of router R2, which network will be present in th e routing table of R4?()
A. Network B
B. Network A and Network B
C. Network A
D. neither Network A nor Network B
第10题:
Which of the listed classes of fire would most likely occur in the engine room of a vessel?
A.Classes A and B
B.Classes B and C
C.Classes C and D
D.Classes A and D