![Which of the following are valid array declarations? a. int[] array- new int[10]; b. double [array double[10]; c. charl charArray Computer Science; None of the above Analyze the following code: class Test public static void main(Stringl] args) System.out.println(xMethod(10); public static int xMethod(int n) System.out.println(int); return n; public static long xMethod(long n) System.out.,println(long); return n The program displays int followed by 10 The program displays long followed by 10. The program does not compile. None of the above. tions 3-4 are based on the following method: e void nPrint(String message, int n) while (n> 0) System.out.print(message);](http://img.homeworklib.com/questions/ccb12b80-61b8-11ec-9c27-17867838d0d1.png?x-oss-process=image/resize,w_560)
![d. The code has a syntax error because xMethod does not have a return statement Analyze the following code. public class Test public static void main(String) args) int n 2 xMethod(n); System.out,printinn is+n): public static void xMetho(int n) a. The code prints n is 2 b. The code prints n is 3. c. The code prints n is 6 d. None of the above. 8. Which of the following method returns the sine of 90 degree? a. Math.sine(90) b. Math sin(90) Math.sin(Pr 0.5) e Math sin(Math.Pi0.5) An array reference variable can be used in which of the following ways? a. As a local variable b. As a parameter of a method c. As a return value of a method d All of the above 10. Consider the following code fragment: int[] list-new int[ 1야 for (int i- 0; ilist length; i+) istfil (intX(Math.randomO *10) Which of the following statements is true? a. list.length must be replaced by 10 b. The loop body will execute 10 times, filling up the array with random numbers c. The loop body will execute 10 times, filling up the array with zeros. d. The code has a runtime error indicating that the array is out of bound.](http://img.homeworklib.com/questions/ce86dba0-61b8-11ec-a5b1-85ca529d8c11.png?x-oss-process=image/resize,w_560)
![11. Given the following statement int] list new int[10]: list.length has the value a. 10 b. c. The value depends on how many integers are stored in list. None of the above. d. Given the following statement int ] list- new int[10]: 12. The array variable list contains ten values of type int. The array variable list contains nine values of type int. b. variable list contains a memory address that refers to an array of 10 int values d. c. The array variable list contains a memory address that refers to an array of 9 int values None of the above. 13. In the following code, what is the printout for list ? class Test public static void main( Stringl] args) int] list1 -(3,2,13 for (int i -0, i list1 length-1++) System.out,print(list I[i]+ 1 23 3 2 1 012 b. d. 2 10 e. 013 Analyze the following code: public class Test 14. public static void main(StringlI args) lx-(0, I, 2,3, 4, 5); xMethod(x, 4) public static void xMethod(int]x, int length) for(int i-ti<length; i++) System.out.print+xiD a. The program displays 0 123.](http://img.homeworklib.com/questions/cefab2e0-61b8-11ec-ab56-a5f9ae1e9c00.png?x-oss-process=image/resize,w_560)
![b. The program displays 0123 and then raises a runtime exception. d. The program displays 0 123 4 and then raises a runtime exception. Analyze the following code: public class Test P 15. void maing(Stringl) arg) intx-new int 5] int i; for (İ-0; İ < x.length, iH) x]-i System.out,println(i-) a. The program displays 0 1 234 b. The program displays 4. c. The program has a runtime error because the last statement in the main method causes ArraylndexOutOfBounds exception. d. method The program has syntax error because i is not defined in the last statement in the main Identify and correct the errors in the following program. (10 pts) public class Test Part II public static void main(String [Jargs) floatx - float [10]: getlnput(x) nPrint(x): System-out.println(The summation İs + process(x)); nPrintx) public static int getinput(float x) for(i=0, i ◇. x.length; İH) il input.nextint0 public static void nPrint (float x) forint i-0,i<x.length; i+) System-out.printf(%d + x[i): public static process(float x) float sum-0 forint į-0; İ < x.length; it+)](http://img.homeworklib.com/questions/cf6f73c0-61b8-11ec-8ca6-d7d70b04e876.png?x-oss-process=image/resize,w_560)
![xli]*2 (10 pts each) III. Show the printout of the following code: public class Testl t public static void main(Stringll args) int i-1; hi5) xMethod() 计+, public static void xMethod(int i) for (int j- 1;jij++) System.out.printinO: b. public class Test2 public static void main String [] args) int x-1 int O array new int [5); fortint i=0;沁amay length, i++) array i)-i xMethod(x, array): System.outprintIn(一primitive variable x- + x); System.out printinf array element array11)- *+ array[ID:](http://img.homeworklib.com/questions/d0073800-61b8-11ec-b540-1bbe82cf7a04.png?x-oss-process=image/resize,w_560)
![public static void xMethod(int x, int [Iy) X-2x for(int i 0:i < y.length, it+) public class Test3 public static void main String 0 args) int x-1 int [ array new int [5]; for int i-0; i< array.length; i+) xMethodlx, array): System.out.printin array element array[l]-+array[ID array[il- i evariable x=-+x); public static void xMethod(int x, int [Dy) x2 x; for(int i 0; i < y.length; İH) d. Given the follwing program, show the values of the aray in the folowing figure public class Test4 publie static void main(Stringl] args) intl values-new int 5]: for (int i l; i<5; i++) values[i]-i+2* values i-1) values[0]- values1]+ values4)](http://img.homeworklib.com/questions/d0986bc0-61b8-11ec-9eaf-810035c3c13c.png?x-oss-process=image/resize,w_560)
Homework Answers
1) Answer: a) int[] array = new int[10];
a) It is valid array declaration because it is the standard syntax to declare an array.
b)It is invalid because it has no new keyword
c) It is invalid because a string cannot be converted into a char array.
2) Answer: The program displays int followed by 10
Explanation: In the main when the xMethod(10) is called it invokes the function static int xMethod(int) because the argument passed in the function call is of type integer but not long.
3) Answer:d) invalid call
Explanation: It gives an error because the function call has float in the second argument where it should be an integer. This results in lossy conversion. And shows an error.
nPrint("a",3.0);
4) Answer: c.3
EXPLANATION: nPrint() function was called using pass by value. So this does not effect the value of k in main(). It's value remains the same.
nPrint("A message",k);
5) Answer: a) the code has syntax error because I is not define before or in System.out.println("i is: +i");
Explanation: The scope of i is limited to the for block. So, i is an unknown symbol when it is used in System.out.println();
6) Answer: d
Explanation: Because the xMethod () doesn't have a return statement in it's definition.
7) Answer: a) The code prints n is 2
Explanation: The xMethod () is called using pass by value. So the change of n in function definition doendoe reflect in the value of n in the main(). So, the value of n remains same, 2.
Add Answer to:
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1-First exercise
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double total = 0;
for(double x: array)
total += x;
return total /...
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