Homework Answers
dohing function returns the 1 increment of the n (that is passed)
yes i can rewrite
public static int dothing(int n){
return n+1;
}
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(b) Trace the following code. // Precondition: n > 0 // <method description here> public static...
5. Given the following class definition, write Java code that implements the addFirst method public class...
5. Given the following class definition, write Java code that implements the addFirst method public class MyLinkedList<E> { private Node<E> head, tail; private int size 0; // Number of elements in the list /** Add an element to the beginning of the list */ public void addFirst (E e) { private static class Node<E> { E element; Node<E> next; public Node (E element) { = element; this.element
2. (15 marks) Consider the following program: >> Precondition: x and y E Z. Postcondition: Return...
2. (15 marks) Consider the following program: >> Precondition: x and y E Z. Postcondition: Return the sum x + y. add(x, y): 1. if x == 0: 2. return y 3. elif x > 0: 4. return add(x - 1, y) + 1 5. else: 6. return add(x + 1, y) - 1 Prove that this program is correct in terms of its specification.
1. t(n) is the runtime of following function, public static int f4(int [] a, int start,...
1. t(n) is the runtime of following function, public static int f4(int [] a, int start, int end){ int ans = 0; if (start >= end) ans = a[start]; else { int mid = (start + end) / 2; int x = f4(a, start, mid); int y = f4(a, mid + 1, end); print(a, start, end); //print each element in a from start to end if (x < y) ans = x; else ans = y; } return ans; }...
Trace this code show the work Public static int funcQ1(int m, int n) { if (m...
Trace this code show the work Public static int funcQ1(int m, int n) { if (m < n) return 0; else return 1 + funQ1(m-n, n); } • What is the value of funcQ1(6, 3), based on the code above? • What is the value of funcQ1(9, 7), based on the code above? • What is the value of funcQ1(-5, 1), based on the code above?
b) Consider the following code. public static int f(int n) if (n == 1) return 0;...
b) Consider the following code. public static int f(int n) if (n == 1) return 0; else if (n % 2 == 0). return g(n/2); else return g(n+1); public static int g(int n) int r = n % 3; if (r == 0) return f(n/3); else if (r == 1) return f(n+2); else return f(2 * n); // (HERE) public static void main(String[] args) { int x = 3; System.out.println(f(x)); (1) (5 points) Draw the call stack as it would...
24) (3x2 marks) Consider the following method: public static int mysteryl (int a, int b) (...
24) (3x2 marks) Consider the following method: public static int mysteryl (int a, int b) ( int result 0: if (a <b) ( else if (a b) else ( return result: result mystery2 (a) mystery2 (a)i result - mystery2 (b) result-ab; public static int mystery2 (int x) f int countx for (int i 0; іск; i++) count +1: return counti What are the values stored in the variable result after the following method calls? a) int result mysteryl(4,1): b) int...
5. What is the Big Oh method m2? public static void m2(int[] arr, int n) for...
5. What is the Big Oh method m2? public static void m2(int[] arr, int n) for (int í = 1; í <= n- 1; i++) pM2(arr [i], arr, 0, i - 1); // end m2 private static void pM2(int entry, int[l arr, int begin, int end) int i- end; for(; (i 〉= begin) && (entry 〈 arr [i]); i--) arr [1 + 1] = arr L1] arr[i + 1] - entry; return // end pM2
5. Write a static method "f(n)" in the space provide, that returns O if n is...
5. Write a static method "f(n)" in the space provide, that returns O if n is even, and if n is odd, returns 1 or -1 according as n is greater than or less than 0. importjava.util.Scanner; public class Q_05 Your "f(n)" method: public static void main(String args[]) mana int n; Scanner input = new Scanner(System.in); System.out.print("Please enetrn: "); n=input.nextInt(); System.out.println(f(n)); "Method f(n)" 7. Write a static method "max" in the space provide, that returns the maximum value from 3...
need help with java questions The following snippet of code would produce what outcome? public static...
need help with java questions
The following snippet of code would produce what outcome? public static void main(String 2 [] args) { int day = 5; switch (day) { case 1: System.out.println("Monday "); case 2: System.out.println("Tuesday "); case 3: System.out.println("Wednesday "); case 4: System.out.println("Thursday "); case 5: System.out.println("Friday "); case 6: System.out.println("Saturday "); case 7: System.out.println("Sunday "); break; default: System.out.println("Invalid Day "); } } Invalid Day Friday Saturday Sunday Invalid Day Friday Friday Saturday Sunday What will be the output...
Analyze the following code: class Test ( private int t static int x; public void method()...
Analyze the following code: class Test ( private int t static int x; public void method() Test test new Test); System.out.println (x); a. The variable t is not initialized and therefore causes er The program compiles fine but has runtime errors because main method. cThe variable t is private and therefore cannot be accessed in t method. The program compiles and runs fine
5. Given the following class definition, write Java code that implements the addFirst method public class MyLinkedList<E> { private Node<E> head, tail; private int size 0; // Number of elements in the list /** Add an element to the beginning of the list */ public void addFirst (E e) { private static class Node<E> { E element; Node<E> next; public Node (E element) { = element; this.element
2. (15 marks) Consider the following program: >> Precondition: x and y E Z. Postcondition: Return the sum x + y. add(x, y): 1. if x == 0: 2. return y 3. elif x > 0: 4. return add(x - 1, y) + 1 5. else: 6. return add(x + 1, y) - 1 Prove that this program is correct in terms of its specification.
b) Consider the following code. public static int f(int n) if (n == 1) return 0; else if (n % 2 == 0). return g(n/2); else return g(n+1); public static int g(int n) int r = n % 3; if (r == 0) return f(n/3); else if (r == 1) return f(n+2); else return f(2 * n); // (HERE) public static void main(String[] args) { int x = 3; System.out.println(f(x)); (1) (5 points) Draw the call stack as it would...
24) (3x2 marks) Consider the following method: public static int mysteryl (int a, int b) ( int result 0: if (a <b) ( else if (a b) else ( return result: result mystery2 (a) mystery2 (a)i result - mystery2 (b) result-ab; public static int mystery2 (int x) f int countx for (int i 0; іск; i++) count +1: return counti What are the values stored in the variable result after the following method calls? a) int result mysteryl(4,1): b) int...
5. What is the Big Oh method m2? public static void m2(int[] arr, int n) for (int í = 1; í <= n- 1; i++) pM2(arr [i], arr, 0, i - 1); // end m2 private static void pM2(int entry, int[l arr, int begin, int end) int i- end; for(; (i 〉= begin) && (entry 〈 arr [i]); i--) arr [1 + 1] = arr L1] arr[i + 1] - entry; return // end pM2
5. Write a static method "f(n)" in the space provide, that returns O if n is even, and if n is odd, returns 1 or -1 according as n is greater than or less than 0. importjava.util.Scanner; public class Q_05 Your "f(n)" method: public static void main(String args[]) mana int n; Scanner input = new Scanner(System.in); System.out.print("Please enetrn: "); n=input.nextInt(); System.out.println(f(n)); "Method f(n)" 7. Write a static method "max" in the space provide, that returns the maximum value from 3...
need help with java questions
The following snippet of code would produce what outcome? public static void main(String 2 [] args) { int day = 5; switch (day) { case 1: System.out.println("Monday "); case 2: System.out.println("Tuesday "); case 3: System.out.println("Wednesday "); case 4: System.out.println("Thursday "); case 5: System.out.println("Friday "); case 6: System.out.println("Saturday "); case 7: System.out.println("Sunday "); break; default: System.out.println("Invalid Day "); } } Invalid Day Friday Saturday Sunday Invalid Day Friday Friday Saturday Sunday What will be the output...
Analyze the following code: class Test ( private int t static int x; public void method() Test test new Test); System.out.println (x); a. The variable t is not initialized and therefore causes er The program compiles fine but has runtime errors because main method. cThe variable t is private and therefore cannot be accessed in t method. The program compiles and runs fine
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