Quiz 2

Question 1

Which of the following statements is not a repetition structure?
1. while
2. for
3. do while
4. if - else if - else

Answer 1

4. if - else if - else

Question 2

Loops may be “nested” inside of other loops. True or false?

Answer 2

True.

Question 3

In the following for loop, what is the bolded section of the loop known as?

for(int i = 0; i < 10; i++){
// do stuff
}

Answer 3

initialization statement

remember, it’s initializing the variable i

Question 4

The for loop is a post-test loop. True or false?

Answer 4

False. It is a pre-test loop

Question 5

The while loop is a pretest loop. True or false?

Answer 5

True.

Question 6

A while loop is ideal for performing \_\_\_\_\_\_\_\_\_\_\_\_\_\_ iterations?
1. a fixed number
2. 0 or more
3. 1 or more

Answer 6

2. 0 or more

Question 7

The for loop is best described as which of the following?
1. a post-test loop
2. a condition-controlled loop
3. a while loop
4. a count-controlled loop

Answer 7

a count-controlled loop

Question 8

Which loop is a post-test loop?

Answer 8

The do while loop

Question 9

In C++ the Boolean value false is stored in memory as the numeric value 1. True or false?

Answer 9

False. It is stored as 0.

Question 10

Assume the following, x = 8, y = 10, and z = 12. What is the result of the Boolean Expression: x != 8 || x <= y?

Answer 10

True

Question 11

In C++, when characters are compared (char datatype) the integer ASCII values are used. True or false?

Answer 11

True.

Question 12

You should always close a file when you are done with it. True or false?

Answer 12

True.

Question 13

In the following for loop, what is the bolded section of the loop known as?

for(int i = 0; i < 10; i++){
// do stuff
}

Answer 13

update statement

Question 14

If you try to open a file to read from it, and the file does not exist, the program will fail to compile. True or false?

Answer 14

False

Question 15

When you call an ofstream object’s open function, the file will be erased if it already exists. True or false?

Answer 15

True.

Question 16

When you call an ifstream object’s open function, the file will be erased if it already exists. True or false?

Answer 16

False.

Question 17

Which of the following statements correctly closes the file object my_file that has been opened and connected to the file data.txt?

Answer 17

my_file.close();

Question 18

Which header would you need to include to define variables for input and output file objects?

Answer 18

fstream

Question 19

You can use the same tools with files that you have used so far with std::cin (>>, getline(), .get() ), if the file has been opened correctly such that you can read from it. True or false?

Answer 19

True.

Question 20

To read data from a file, you need to create an instance (variable) of the type \_\_\_\_\_\_\_\_\_\_.

Answer 20

ifstream

Question 21

To write data to a file, you need to create an instance (variable) of the type \_\_\_\_\_\_\_\_\_\_.

Answer 21

ofstream