Exam1(Ch1, 2).doc

Name:_Covers Chapters 1 and 2Introduction to ProgrammingHarbin Normal UniversityInstructor: FullwayPowered By: Y. Daniel LiangPart I: Multiple Choice Questions: (1 pt each)1. aTo add a to b and store result in b, you write (Note: Java is case-sensitive)a.b += a;b.a = b + a;c.b = A + b;d.a += b;2.dTo declare a constant PI, you writea.final static PI = 3.14159;b.final float PI = 3.14159;c.static double PI = 3.14159;d.final double PI = 3.14159;3.cTo declare an int variable x with initial value 200, you x = 200L; x = 200l; x = 200; x = 200.0;4.dTo assign a double variable d to an int variable x, you writea.x = (long)db.x = (int)d;c.x = d;d.x = (float)d;5.dWhich of the Boolean expressions below has incorrect syntax?a.(true) & (3 4)b.!(x 0) & (x 0)c.(x 0) | (x 0)d.(x != 0) | (x = 0)6.bWhich of the following is the correct expression that evaluates to true if the number x is between 1 and 100 or the number is negative?a.1 x 100 & x 0b.(x 1) | (x 0)c.(x 1) & (x x 100) | (x 0)7.aWhich of the following is the correct expression of character a?a.ab.ac.000ad.None of the above.8.aWhich of the following is a constant, according to Java naming conventions?a.MAX_VALUEb.Testc.readd.ReadInt9.aWhich of the following assignment statements is illegal?a.float f = -34; t = 23;c.short s = 10;d.float f = 34.0;10.bA Java statement ends with a _.ma (,)b.semicolon (;)c.period (.)d.closing brace11.bThe assignment operator in Java is _.a.:=b.=c.= = d.-12.dWhich of these data types requires the least amount of memory?a.floatb.doublec.short d.byte13.aWhich of the following operators has the highest precedence?a.castingb.+c.*d./14.eAn int variable can hold _.a.xb.93c.98.3d.truee.a and b15.aWhich of the following assignment statements is correct to assign character 5 to c?a.char c = 5;b.char c = 5;c.char c = 5;d.char c = 344;16.bThe not equal comparison operator in Java is _.a.b.!=c.!= = d.=17.cIf you attempt to add an int, a byte, a long, and a double, the result will be a _ ;c.long;d. double;18.cIf a program compiles fine, but it terminates abnormally at runtime, then the program suffers _.a.a syntax errorb.a runtime errorc.a logic error19.cSuppose x=0 and y=0 what is x after evaluating the expression (y 0) & (1 x+). a.0b.-1c. 120.aSuppose x=0 and y=0 what is x after evaluating the expression (y 0) & (1 x+).a.0b.-1c.121.d Suppose you define a Java class as follows:public class Test In order to compile this class, the class should be stored in a file nameda. Test.classb. Test.docc. Test.txtd. Test.javae. Any name with extension .java22. cThe command to compile a class in the file Test.java isa. java Testb. java Test.javac. javac Test.javad. javac Teste. JAVAC Test.java23. aWhich JDK command is correct to run a Java application in ByteCode.class?a. java ByteCodeb. java ByteCode.classc. javac ByteCode.javad. javac ByteCodee. JAVAC ByteCode24. bWhat is 1 % 2?a. 0b. 1c. 225. cWhat is Welcome + 1 + 1*2?a. Welcome11*2b. Welcome4c. Welcome12d. Welcome326. d What is the printout of the following code:double x = 10.1;int y = (int)x;System.out.println(x is + x + and y is + y);a. x is 10 and y is 10b. x is 10.0 and y is 10.0c. x is 11 and y is 11d. x is 10.1 and y is 10e. x is 10.1 and y is 10.0Part II: Find and correct errors in the following code:(5 pts)public class Test public void Main(String args) /public前要加staitic int j = i + 1;/i要定义且要赋初值,其上一句加上int i=0 int k = MyInput.readDouble()5.5;/k为整形，改为k=5 System.out.println(j is + j + and /转行时应加上加号，改为”and”+”k is” k is + k); Part III: Show the output of the following code:(5 pts)public class Test public static void main(String args) int x1, x2, i, j, k, y, z; float f; x1 = 1; x2 = 1; y = 5 + x1-;6 z = 5 + +x2;7 i = 6 % 4;2 j = 1; j += j + 3;5 k = 25 / 2;12 f = (float)(2 / 5) * k);0.0 System.out.println(x1 is + x1); System.out.println(x2 is + x2); System.out.println(i is + i); System.out.println(j is + j); System.out.println(k is + k); System.out.println(y is + y); System.out.println(z is + z); System.out.println(f is + f); 结果为：x1 is 0x2 is 2i is 2j is 5k is 12y is 6z is 7f is 0.0Part IV: (5 pts) (Dont use the if statement) Write a complete program named Exam1.java. The program reads a double number and checks whether the number is between 1 and 1000. For example, if your input is 5, the output should be: Is the number 5 between 1 and 1000? trueIf your input is 2000, the output should be: Is the number 2000 between 1 and 1000? false答：public class Example1 Pub