Exam 4: Loops

Suppose that the chance to hit the jackpot in a lottery is one in one million. Which of the following code snippets simulates that random number?

How many times will the output line be printed in the following code snippet? For (int num2 = 1; num2 <= 3; num2++) { For (int num1 = 0; num1 <= 2; num1++) { System.out.println("" + num2 + " " + num1); } }

What is the output of the code fragment given below? Int i = 0; Int j = 0; While (i < 125) { I = i + 2; J++; } System.out.println(j);

What is the output of the code snippet given below? Int i; Int j = 0; For (i = 0; i < 5; i++) { If (i % 2 == 0) { I = i + 2; J++; } Else { I++; J = j + 2; } J++; } System.out.println("i=" + i + ", j=" + j);

What changes do you need to make in the following code snippet to display "Let us learn Java" exactly 10 times? Int i = 0; While (i <= 10) { System.out.println("Let us learn Java"); I++; }

Is the code snippet written below legal? String s = "1234"; For (int i = 0; i <= 5; i++) { System.out.print); }

Which of the following is considered a loop with a problematic condition?

How do you fix this code snippet to make it print out the sum when the user enters Q? System.out.print("Enter a value, Q to quit: "); Double sum = 0; Scanner in = new Scanner(System.in); Boolean hasData = true; Do { Double value = in.nextDouble(); Sum = sum + value; System.out.print("Enter a value, Q to quit: "); } While (in.hasNext()); System.out.println("sum " + sum);

Suppose that a program asks a user to enter multiple integers, either positive or negative, to do some calculation. The data entry will stop when the user enters a certain value to indicate the end of the data. What value should the code use as the sentinel?

A loop inside another loop is called:

Which of the following is correct for simulating the toss of a pair of coins to get 0 (head) or 1 (tail) with different probabilities?

Which of the following code snippets will generate a random number between 0 and 79?

Which of the following activities can be simulated using a computer? I. Waiting time in a line at a restaurant II. Tossing a coin III. Shuffling cards for a card game

What is the output of the code snippet given below? String s = "abcdefghijkl"; Int i = 1; Do { If (i > 2) { System.out.print(s.substring (1, i)); } I++; } While (i < 5);

Which error type does the "off-by-one" error belong to?

How many times does the following loop execute? Int upperCaseLetters = 0; String str = "abcdefgHIJKL"; Boolean found = false; For (int i = str.length() - 1; i >= 0 && !found; i--) { Char ch = str.charAt(i); If (Character.isUpperCase(ch)) { UpperCaseLetters++; } Else { Found = false; } }

Which of the following is the correct code snippet for throwing a pair of dice to get a sum of the numbers on two dice between 2 and 12 with different probabilities?

What is the output of this code snippet? Int s = 1; Int n = 1; Do { S = s + n; System.out.print(s + " "); N++; } While (s < 3 * n);

What is the output of the code snippet given below? String s = "abcde"; Int i = 1; While (i < 5) { System.out.print); I++; }

How many times does the following loop execute? Int upperCaseLetters = 0; String str = "abcdEfghI"; Boolean found = false; For (int i = 0; i < str.length() && !found; i++) { Char ch = str.charAt(i); If (Character.isUpperCase(ch)) { Found = true; } }