D278 practice exam 1 Questions with Verified
Correct Answers
A bus driver starts a route with 12 passengers. At the first stop, 4 passengers get on and 3 get
off. What is the value of numPassengers after the first stop?
13
A program tracks the number of books returned to a library. The variable returnedBooks
should hold a count value. Which data type should the variable be?
Integer
A baker's recipe uses a fixed sugar-to-flour ratio of 0.4 in many calculations. How should the
item that holds this ratio be declared?
Constant float sugarFlourRatio
Given integer a = 6 and integer b = 4. What is the value of the expression (a / 2.0) + b?
7.0
Given float p = 8.4 and float q = 2.0. What is the value of the expression p / q?
4.2
What kind of operator is the != in the expression count != 10?
Relational (inequality)
A program is checking whether userScore is between 70 and 89 inclusive (a B grade range).
Which expression correctly captures this range?
(userScore >= 70) and (userScore <= 89)
Which operator should be used to determine if a number is evenly divisible by 3?
%
Which data type is used to track a person's exact weight in pounds?
Float
, A weather program needs to determine if it is currently raining (true or false). Which data
type should be used for that variable?
Boolean
Given integer x = 8 and integer y = 3. What is the value of the expression (x % y) + (x / y)?
4
A movie theater offers a senior discount with the following logic: if customerAge >= 65 then
ticketPrice = 8, else ticketPrice = 12. Given customerAge = 70, what is the final value of
ticketPrice?
8
A delivery service charges extra for heavy packages with the following logic: if packageWeight
> 50 then fee = 25, else fee = 10. If packageWeight is 45, which branch executes?
else (false) branch
A program should prompt the user to enter test scores and continue accepting scores until the
user enters -1 to stop. Which control structure should be used?
While loop
A guessing game asks the user to enter a number, then checks if it matches the secret number.
The program must always prompt at least once and continue prompting until the correct
number is entered. Which control structure should be used?
Do-while loop
A program needs to print "Welcome" exactly 5 times. Which control structure is preferred?
For loop
What is put to output by the following pseudocode? x = 4; do; Put x to output; Put " " to
output; x = x - 1; while x > 0
4321
What is the loop expression in the following pseudocode? n = 1; while n <= 50; Put n to
output; n = n + 1
n <= 50
A programmer writes the following code: total = 0; while total < 10: print "loop". What is the
result of implementing this code?
Correct Answers
A bus driver starts a route with 12 passengers. At the first stop, 4 passengers get on and 3 get
off. What is the value of numPassengers after the first stop?
13
A program tracks the number of books returned to a library. The variable returnedBooks
should hold a count value. Which data type should the variable be?
Integer
A baker's recipe uses a fixed sugar-to-flour ratio of 0.4 in many calculations. How should the
item that holds this ratio be declared?
Constant float sugarFlourRatio
Given integer a = 6 and integer b = 4. What is the value of the expression (a / 2.0) + b?
7.0
Given float p = 8.4 and float q = 2.0. What is the value of the expression p / q?
4.2
What kind of operator is the != in the expression count != 10?
Relational (inequality)
A program is checking whether userScore is between 70 and 89 inclusive (a B grade range).
Which expression correctly captures this range?
(userScore >= 70) and (userScore <= 89)
Which operator should be used to determine if a number is evenly divisible by 3?
%
Which data type is used to track a person's exact weight in pounds?
Float
, A weather program needs to determine if it is currently raining (true or false). Which data
type should be used for that variable?
Boolean
Given integer x = 8 and integer y = 3. What is the value of the expression (x % y) + (x / y)?
4
A movie theater offers a senior discount with the following logic: if customerAge >= 65 then
ticketPrice = 8, else ticketPrice = 12. Given customerAge = 70, what is the final value of
ticketPrice?
8
A delivery service charges extra for heavy packages with the following logic: if packageWeight
> 50 then fee = 25, else fee = 10. If packageWeight is 45, which branch executes?
else (false) branch
A program should prompt the user to enter test scores and continue accepting scores until the
user enters -1 to stop. Which control structure should be used?
While loop
A guessing game asks the user to enter a number, then checks if it matches the secret number.
The program must always prompt at least once and continue prompting until the correct
number is entered. Which control structure should be used?
Do-while loop
A program needs to print "Welcome" exactly 5 times. Which control structure is preferred?
For loop
What is put to output by the following pseudocode? x = 4; do; Put x to output; Put " " to
output; x = x - 1; while x > 0
4321
What is the loop expression in the following pseudocode? n = 1; while n <= 50; Put n to
output; n = n + 1
n <= 50
A programmer writes the following code: total = 0; while total < 10: print "loop". What is the
result of implementing this code?
