6: CONTROL FLOW in Java

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CHAPTER 6: CONTROL FLOW
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Which of the following implementations of a max() method will correctly return the largest value
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// (1) int max(int x, int y) { return (if (x > y) { x; } else { y; }); } // (2) int max(int x, int y) { return (if (x > y) { return x; } else { return y; }); } // (3) int max(int x, int y) { switch (x < y) { case true: return y; default: return x; }; } // (4) int max(int x, int y) { if (x>y) return x; return y; }
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Select the one correct answer (a) (b) (c) (d) 617 Implementation labeled (1) Implementation labeled (2) Implementation labeled (3) Implementation labeled (4)
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Given the following code, which statement is true
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class MyClass { public static void main(String[] args) { int k=0; int l=0; for (int i=0; i <= 3; i++) { k++; if (i == 2) break; l++; } Systemoutprintln(k + ", " + l); } }
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Select the one correct answer (a) The program will fail to compile (b) The program will print 3, 3, when run (c) The program will print 4, 3, when run, if break is replaced by continue (d) The program will fail to compile if break is replaced by return (e) The program will fail to compile if break is by an empty statement
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64: TRANSFER STATEMENTS
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Which statements are true Select the two correct answers (a) (b) (c) (d) (e)
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{{}} is a valid statement block { continue; } is a valid statement block block: { break block; } is a valid statement block block: { continue block; } is a valid statement block The break statement can only be used in a loop (while, do-while or for) or a switch statement
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Which declaration will result in the program compiling and printing 90, when run
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public class RQ400_10 { public static void main(String[] args) { // (1) INSERT DECLARATION HERE int sum = 0; for (int i : nums) sum += i; Systemoutprintln(sum); } }
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Select the two correct answers (a) Object[] nums = {20, 30, 40}; (b) Number[] nums = {20, 30, 40}; (c) Integer[] nums = {20, 30, 40}; (d) int[] nums = {20, 30, 40}; (e) None of the above 620 Which method declarations, when inserted at (1), will result in the program compiling and printing 90 when run
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public class RQ400_30 { public static void main(String[] args) { doIt(); } // (1) INSERT METHOD DECLARATION HERE }
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Select the two correct answers (a) public static void doIt() {
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int[] nums = {20, 30, 40}; for (int sum = 0, i : nums) sum += i; Systemoutprintln(sum); }
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(b) public static void doIt() {
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for (int sum = 0, i : {20, 30, 40}) sum += i; Systemoutprintln(sum); }
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CHAPTER 6: CONTROL FLOW
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(c) public static void doIt() {
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int sum = 0; for (int i : {20, 30, 40}) sum += i; Systemoutprintln(sum); }
(d) public static void doIt() {
int sum = 0; for (int i : new int[] {20, 30, 40}) sum += i; Systemoutprintln(sum); }
(e) public static void doIt() {
int[] nums = {20, 30, 40}; int sum = 0; for (int i : nums) sum += i; Systemoutprintln(sum); }
Given the declaration:
int[][] nums = {{20}, {30}, {40}};
Which code will compile and print 90, when run Select the one correct answer (a) {
int sum = 0; for (int[] row : nums[]) for (int val : nums[row]) sum += val; Systemoutprintln(sum); }
(b) {
int sum = 0; for (int[] row : nums[][]) for (int val : nums[row]) sum += val; Systemoutprintln(sum); }
(c) {
int sum = 0; for (int[] row : nums) for (int val : nums[row]) sum += val; Systemoutprintln(sum); }
(d) {
int sum = 0; for (int[] row : nums) for (int val : row)