INTRODUCTION TO JAVA PROGRAMMING教学（华南理工）TEST2.docVIP

窗体顶端 ?1. Every letter in a Java keyword is in lowercase? A. true abstract, Boolean, break, byte, case, catch, char, class, B. false const, continue, default, do, double, else, extends, false A final, float, for, if, implements, import, native, null, package 2? Which of the following is a valid identifier? A. $343 标识符可以是 字母、数字、$、_(下划线)，不可用数字开头，不能是java 的关键字 B. class C. 9X D. 8+9 E. radius 3? Which of the following are correct names for variables according to Java naming conventions? A. radius B. Radius C. RADIUS D. findArea E. FindArea AD 4? Which of the following are correct ways to declare variables? A. int length; int width; B. int length, width; C. int length; width; D. int length, int width; AB 5? ____________ is the Java assignment operator. A. == B. := C. = D. =: C 6? To assign a value 1 to variable x, you write A. 1 = x; B. x = 1; C. x := 1; D. 1 := x; E. x == 1; B 7? Which of the following assignment statements is incorrect. A. i = j = k = 1; B. i = 1; j = 1; k = 1; C. i = 1 = j = 1 = k = 1; D. i == j == k == 1; CD 8? To declare a constant MAX_LENGTH inside a method with value 99.98, you write A. final MAX_LENGTH = 99.98; (float 单精度 double 双精度) B. final float MAX_LENGTH = 99.98; （当用final修饰一个类时，表明这个类不能被继承 C. double MAX_LENGTH = 99.98;（对于一个final变量，如果是基本数据类型的变量，则D. final double MAX_LENGTH = 99.98; 值一旦在初始化之后便不能更改；如果是引用类型的变量，则在对其初始化之后便不能再让其指向另一个对象。 9? Which of the following is a constant, according to Java naming conventions? A. MAX_VALUE B. Test C. read D. ReadInt E. COUNT AE 10? To improve readability and maintainability, you should declare _________ instead of using literal values such as 3.14159. A. variables B. methods C. constants D. classes C 11? Which of these data type requires the most amount of memory? A. long B. int C. short D. byte A 12? To declare an int variable number with initial value 2, you write A. int number = 2L; B. int number = 2l; C. int number = 2; D. int number = 2.0; C 13? What is the result of 45 / 4? A. 10 B. 11 C.