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COSC1436 Exam Practice Questions and Answers
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COSC1436 Exam Practice Questions and Answers What's the difference between initializing a variable and assigning a value to a variable? - ANSWER- Assigning is storing a value into the variable's memory location. Once you assign a value, you can reassign another value at any time. Initializing ...

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  • November 3, 2024
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  • 2024/2025
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Copyright © KAYLIN 2024/2025 ACADEMIC YEAR. ALL RIGHTS RESERVED FIRST PUBLISH NOVEMBER, 2024




COSC1436 Exam Practice Questions and

Answers


What's the difference between initializing a variable and assigning a value to a variable? - ANSWER✔✔-

Assigning is storing a value into the variable's memory location. Once you assign a value, you can

reassign another value at any time.




Initializing is simply assigning a value to a variable for the first time.


Declare an integer variable called ageOfStudent and initialize it to 16. - ANSWER✔✔-int ageOfStudent =

16;


Declare a doublevariable called tipRateandinitializeit to .20. - ANSWER✔✔-double tipRate = .20;


Declare twostringvariables called firstName, and lastName, but do not initialize them to anything -

ANSWER✔✔-string firstName, lastName;


Given an integer variable called ageOfStudent (assume it is already set), write a statement that will


display the value of ageOfStudent. - ANSWER✔✔-cout << ageOfStudent;


Given a double variable called tipRate (assume it is already set to .20), write a statement that will


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display the value of tipRate with two decimal places. - ANSWER✔✔-cout << fixed << setprecision(2) <<

tipRate;


Given two string variables called firstName and lastName (assume they are both already


initialized), write a statement that will display the values of firstName followed by a space, followed


by the lastName - ANSWER✔✔-cout << firstName << " " << lastName << endl;


Given two string variables called firstName and lastName (assume they are both already


initialized), write a statement that will display the values of lastName in a field of 20 spaces

(rightjustified), followed by the value of firstName in a field of 20 spaces, also right-justified). -

ANSWER✔✔-cout << setw(20) << lastName << setw(20) << firstName;


Assume that m is an int variable that has already been given a value. Write a statement that prints


out the value of m in a field of 10 positions. - ANSWER✔✔-cout << setw(10) << m;


Given two integer variables distance and speed, write an expression that


divides distance by speed using floating point arithmetic. - ANSWER✔✔-(double) distance/speed


Assume that students is an integer variable containing the number of students in a school, and


that teachers is an integer variable containing the number of teachers in the same school. Write a


statement that will print out the average number of students per teacher.



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Keep in mind that we want the answer to have a decimal number.


Hint: You will need to use type-casting. You may use the long or short version of type casting -

ANSWER✔✔-cout << (double) students/teachers;


. Given an int variable datum that has already been declared, write a statement that reads an integer


value from standard input into this variable. - ANSWER✔✔-cin >> datum;


Given a string variable firstName that has already been declared, write a statement that reads a


name from standard input into this variable. - ANSWER✔✔-cin >> firstName


n. Given a string variable firstAndLastName that has already been declared, write a statement that


reads an entire name (first and last name) from standard input into this variable. For example, the


user might enter "J. K. Rowling" or "Robyn Rihanna Fenty", or "Madonna", etc.... - ANSWER✔✔-

getline(cin, firstAndLastName);


Write an if statement to determine if the int variable age is within the range of 0 through 17


(including both those ages). Simply write the: if (condition) - ANSWER✔✔-if (age >= 0 && age <= 17)


. Write an if statement to determine if the int variable age is less than 0 or greater than 17. Simply


write the: if (condition) - ANSWER✔✔-if (age < 0 | | age > 17)


. Assume the following:

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if (funny == 5)


cout << "So funny!" << endl;


else if (funny == 10)


cout << "Seriously funny!" << endl;


else


{


cout << "ERROR!" << endl;


cout << "Incorrect choice!" << endl;


}


Rewrite the above if statement as a switch - ANSWER✔✔-switch (funny) {




case 5:


cout << "So funny!" << endl;


break




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