COSC1436 UPDATED ACTUAL Questions and CORRECT Answers
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Course
COSC 1436
Institution
COSC 1436
COSC1436 UPDATED ACTUAL Questions
and CORRECT Answers
What's the difference between initializing a variable and assigning a value to a variable? -
CORRECT ANSWER- Assigning is storing a value into the variable's memory location.
Once you assign a value, you can reassign another value at any t...
COSC1436 UPDATED ACTUAL Questions
and CORRECT Answers
What's the difference between initializing a variable and assigning a value to a variable? -
CORRECT 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. - CORRECT
ANSWER- ✔✔int ageOfStudent = 16;
Declare a doublevariable called tipRateandinitializeit to .20. - CORRECT ANSWER-
✔✔double tipRate = .20;
Declare twostringvariables called firstName, and lastName, but do not initialize them to
anything - CORRECT 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. - CORRECT ANSWER- ✔✔cout << ageOfStudent;
Given a double variable called tipRate (assume it is already set to .20), write a statement that
will
display the value of tipRate with two decimal places. - CORRECT 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 - CORRECT 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). - CORRECT 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. - CORRECT ANSWER- ✔✔cout << setw(10)
<< m;
Given two integer variables distance and speed, write an expression that
divides distance by speed using floating point arithmetic. - CORRECT 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.
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
- CORRECT 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. - CORRECT 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. - CORRECT 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.... -
CORRECT 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) - CORRECT 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) - CORRECT ANSWER- ✔✔if (age < 0 | | age > 17)
Given the variable temperature write an expression that evaluates to true if and only if the
temperature is equal to 32. This is just the expression (e.g., A>B, A<=B, etc...). Do not use
parenthesis or an equal sign. - CORRECT ANSWER- ✔✔temperature == 32
. Given the variables temperature and humidity, write an expression that evaluates to true if
and
only if the temperature is greater than 90 and the humidity is less than 10.
Remember, this is just an expression (e.g., A>B, A==B, etc...). Do not use parenthesis or an
equal
Assume the following:
int age;
int baby=child=teen=0;
cout << "Enter age of child: ";
cin >> age;
Write the entire if/else-if/else statement that will:
• Increment by 1 the baby variable if the ageis between 0 and 2 (including both those values)
• Increment by 1 the child variable if the ageis between 3 and 12 (including both those
values)
• Increment by 1 the teen variable if the age is between 13 and 17 (including both those
values)
• Display an error message if the the age is less than 0 or greater than or equal to 18 -
CORRECT ANSWER- ✔✔if (age >= 0 && age <= 2)
baby++;
else if (age >= 3 && age <= 12)
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