Question

CHAPTER 6

QUESTION 1 Which of these names follows the naming conventions for constants presented in this chapter? a. WeeksInYear b. Weeks_In_Year c. weeks_in_year d. WEEKS_IN_YEAR 1 points QUESTION 2 Which of the following data types can you not use to store the value 500? a. float b. char c. int d. double 1 points QUESTION 3 What values are in the vector named pressures after the following code is executed? vector pressures; pressures.push_back(32.4); pressures.push_back(33.5); pressures.insert(pressures.begin(), 34.2); int index = 2; pressures.insert(pressures.begin() + index, 31.8); pressures.push_back(33.3); index = 1; pressures.erase(pressures.begin() + index); a. 34.2, 33.5, 31.8, 33.3 b. 34.2, 33.5, 33.3 c. 34.2, 31.8, 33.5, 33.3 d. 34.2, 31.8, 33.3 1 points QUESTION 4 If the result of an arithmetic expression is assigned to a variable with a type that could cause a loss of data when the conversion is performed, you should a. modify the code so it uses a data type that won’t cause a loss of data b. explicitly cast the data so an error doesn’t occur at runtime c. add code that checks for any errors that may be caused by the conversion d. explicitly cast the data to indicate that you intend to perform the conversion 1 points QUESTION 5 What is the value of the string named phone after the following code is executed? string phone = "555 555 1212"; phone.insert(0, "("); phone.insert(4, ")"); phone.insert(9, "."); phone.erase(10, 1); a. (555 )555. 1212 b. (555) 555. 1212; c. (555) 555.1212 d. (555)555.1212; 1 points QUESTION 6 What is the value of the variable named street after the following code is executed? string address = "123 Main St., Somewhere, CA 93299"; string street = ""; int index1 = address.find('.'); int index2 = address.find(','); if (index1 > -1 && index2 > -1) { if (index1 < index2) { street = address.substr(0, index1); } else { street = address.substr(0, index2); } } a. "123 Main St" b. "" c. "123 Main St.," d. "123 Main St." 1 points QUESTION 7 What will happen when the following code is executed? string password = "B286!899-4389"; for (int i = 1; i < password.size(); ++i) { cout << password[i] << ' '; } a. Each character of the password except for the last character will be displayed on the console. b. Each character of the password will be displayed on the console, and then an out_of_range exception will occur. c. Each character of the password will be displayed on the console. d. Each character of the password except for the first character will be displayed on the console. 1 points QUESTION 8 What happens if an integer variable is assigned a value that’s too big for its type? a. The variable will overflow and be reduced to the type’s maximum value. b. Zero will be assigned to the variable. c. The variable will overflow and wrap around to the type’s minimum value. d. An error will occur. 1 points QUESTION 9 Type conversion occurs automatically when a. you assign the result of an arithmetic expression with one data type to a variable of another data type b. you perform an arithmetic operation with different data types c. you perform a comparison operation with different data types d. all of the above e. a and b only 1 points QUESTION 10 Given two double variables named x and y, which of the following statements could you use to initialize both variables to a value of 0.0? a. x | y = 0.0; b. x = y = 0.0; c. x, y = 0.0; d. none of the above

Answer 1

QUESTION 1

d. WEEKS_IN_YEAR

QUESTION 2

b. char

QUESTION 3

c. 34.2, 31.8, 33.5, 33.3

pressures.push_back(32.4);
   pressures.push_back(33.5); // 32.4 33.5
   pressures.insert(pressures.begin(), 34.2); // 34.2 32.4 33.5
   int index = 2;
   pressures.insert(pressures.begin() + index, 31.8); // 34.2 32.4 31.8 33.5
   pressures.push_back(33.3); // 34.2 32.4 31.8 33.5 33.3
   index = 1;
   pressures.erase(pressures.begin() + index); // 34.2 31.8 33.5 33.3
  

QUESTION 4

d. explicitly cast the data to indicate that you intend to perform the conversion

QUESTION 5

c. (555) 555.1212

QUESTION 6

a. "123 Main St"

QUESTION 7

d. Each character of the password except for the first character will be displayed on the console.

index starts from 1 not 0 . Output = 2 8 6 ! 8 9 9 - 4 3 8 9

QUESTION 8

d. An error will occur.

QUESTION 9

b. you perform an arithmetic operation with different data types

QUESTION 10 G

b. x = y = 0.0;

Do ask if any doubt. Please upvote.