超星 - 选择结构章节测试 - 查题吧

单选题

A block of code is enclosed in a set of_。代码块包含在一组_中。

A. braces { } 花括号
B. parentheses ( ) 括号
C. double quotes " " 双引
D. brackets [ ]中括号

单选题

A flag may have the value标识可能的值：

A. 0 or 1
B. +1 or -1
C. true or false
D. of any character 任意字符

单选题

If chr is a character variable, which of the following if statements is written correctly?如果chr是字符变量，那么以下哪个if语句编写正确？

A. if (chr = "a")
B. if (chr == "a")
C. if (chr = 'a')
D. if (chr == 'a')

单选题

In Java, when a character is stored in memory, it is actually stored as a(n)_.在Java中，当字符存储在内存中时，它实际上存储为_.

A. Unicode numberUnicode编码
B. ASCII character code ASCII字符代码
C. EBCDIC character code EBCDIC字符代码
D. Morse code 摩尔斯电码

单选题

This is an international coding system that is extensive enough to represent all the characters of all the world’s alphabets:这是一个国际编码系统，范围广泛，足以代表世界上所有字母的所有字符：

ASCII
B. Unicode
C. Java
D. None of the above

单选题

What will be the values of ans, x, and y after the following statements are executed?执行以下语句后，ans，x和y的值是什么？int ans = 35, x = 50, y =50;if ( x >= y){ans = x + 10;x -=y;} else {ans = y + 10;y += x;}

A. ans = 60, x = 50, y =100
B. ans = 60, x =0, y =50
C. ans = 45, x = 50, y = 0
D. ans = 45, x = 50, y = 50

单选题

What will be the value of bonus after the following code is executed?执行以下代码后，bonus的值是多少？int bonus, sales = 10000;if (sales < 5000)bonus = 200;else if (sales < 7500)bonus = 500;else if (sales < 10000)bonus = 750;else if (sales < 20000)bonus = 1000;elsebonus = 1250;

A. 200
B. 500
C. 750
D. 1000
E. 1250

单选题

阅读下面代码if(award== 0) {System.out.println("金奖");}elseif(award> -7) { System.out.println("银奖");}else{System.out.println("铜奖");}若要求打印字符串"铜奖",则变量award的取值范围是_____。()

A. award=0&award<=-7
B. award>0
C. award>-7
D. award<=-7

单选题

In most editors, you are indenting by one level each time that you press this key:在大多数编辑器中，每次按此键都会缩进一级：

A. Tab
B. Shift
C. Alt
D. Space

单选题

If you prematurely terminate an if statement with a semicolon, the compiler will:如果过早用分号终止if语句，则编译器将：

A. Not display an error message 不显示错误信息
B. Assume you are placing a null statement there 假设您在此处放置一个空语句
C. All of the above 以上都是
D. None of the above 以上都不是

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