Chapter 5 Quiz Starting Out With C++ 043

The _____ statement causes a loop to terminate early. The _____ statement causes a loop to stop its current iteration and begin the next one.

a.. continue, break
b. break, continue

Chapter 5 Quiz Starting Out With C++ 042

Reading and Writing files in C++.  How can you tell if a file was successfully opened in C++?

assume inFile was defined as an ifstream object

a. test ifstream and see if it is true
b. test inFile and check if it is true
c. test open(inFile) == true
d. check if inFile returns an error.

Chapter 5 Quiz Starting Out With C++ 041

Writing and Reading files in C++.  What can be used to read lines of data from a file?

a. the readLine() function
b. a loop
c. cin
d. inFile

Chapter 5 Quiz Starting Out With C++ 040

Reading and Writing files in C++.  Will the following segment of code read the name of a city?

ifstream inFile;
string city;

inFile.open("cities.txt");
cout << "Reading city name from the file.\n";

inFile >> city; // Read the city name from the file

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 039

Writing and Reading files in C++.  The >> operator combined with an ifstream object can be used to read from a file?

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 038

Writing and Reading files in C++.  Given that outFile has been defined with ofstream, which statement will write the data to a file?

a. cout(outFile) << " Hello Student";
b. cout << outFile << "Hello Student";
c. outFile << "Hello Student";
d. outFile -> "Hello Student";

Chapter 5 Quiz Starting Out With C++ 037

Writing and Reading a file in C++.  How do you close a file in C++?

a. ifstream inFile.close();
b. inFile.Close();
c. inFile.close();
d. close(inFile);

Chapter 5 Quiz Starting Out With C++ 036

Reading and Writing files in C++.  What does the following statement do?

ifstream inFile("NewHires.txt");

a. defines a input file stream  named inFile and opens the file NewHires.txt.
b. defines the input stream but does not open it.
c. checks to see if the file NewHires.txt exists
d. none of the above.  You can't do all that in one statement

Chapter 5 Quiz Starting Out With C++ 035

_____ backslashes are required to represent one blackslash when setting the path of a file in a string.

a. two
b. three
c. one

Chapter 5 Quiz Starting Out With C++ 034

Reading and Writing files in C++.  Is this how you set up a file for output in C++?

ofstream outFile;
outFile.open("Sales.txt");

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 033

Writing and Reading files in C++.  The following is the correct way to set up a file for reading?

ifstream inFile;
inFile.open("Employees.txt");

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 032

Reading and Writing files in C++.  _____ is used for output, _____ is used for input and _____ is used for reading or writing.

a.  fstream, ofstream, ifstream
b. ifstream, ofstream, fstream
c. ifstream, fstream, ofstream
d. fstream, fstream, fstream

Chapter 5 Quiz Starting Out With C++ 031

Reading and Writing files in C++.  _____ contains all the declarations necessary for file operations.

a. fileIOstream
b. file.h
c. fstream
d. fileReadWrite

Chapter 5 Quiz Starting Out With C++ 030

Writing and Reading files in C++.  What must be created in order to be able to work with files/

a. filesys link
b. file stream object
c. binary stream
d. random access link

Chapter 5 Quiz Starting Out With C++ 029

Writing and Reading files in C++.  Random access files or direct access files are considered the same thing?

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 028

Reading and Writing files in C++.  Sequential access files can be accessed at any location in the file.  This may include forward and backwards?

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 027

Reading a writing files in C++.  A _____ file can be easy read by human eyes, whereas a _____ file is more difficult.

a. binary, ASCII
b. ASCII, binary
c. text, ASCII
d. ASCII, text

Chapter 5 Quiz Starting Out With C++ 026

Using data files in C++.  What are the steps required for using a file in a program in C++?

a.  Process the file, Open the file, Close the file

b. Open the file, Process the file, Close the file

c. Close the file, Process the file, Open the file

Chapter 5 Quiz Starting Out With C++ 025

A loop that is inside another loop is called a _____?

a. internal loop
b. indented loop
c. blocked loop
d. nested loop

Chapter 5 Quiz Starting Out With C++ 024

The file temp.txt has the following values.  What is probably the sentinel value?

98, 101, 95, 93, 85, 73, 73, 75, 0

a. 98
b. 0
c. 85
d. \n

Chapter 5 Quiz Starting Out With C++ 023

What is a sentinel in C++? (mark the best answer)

a. a sentinel is a special value that marks the end of a list of values.
b. a routine that makes performs validation on the values
c. a sentinel is always -1 and terminates a list of values
d. a sentinel is a special value that is defined by the user.

Chapter 5 Quiz Starting Out With C++ 022

A _____ is a sum of numbers that accumulates with each iteration of a loop. The variable used to keep the running total is called an _____.

a. accumulator, running total
b. running total, accumulator

Chapter 5 Quiz Starting Out With C++ 021

Can you omit or leave out the initialization expression from a for-loop?

int i= 1;
int maxVal=10;

for ( ; i<= maxVal; i++)
   cout << i << "\t\t" << (i * i) << "\n";

a. yes, if you have already initialized the test variable
b. yes, the for loop will automatically create the variable i and set it to 0
c. no, the compiler will generate an error
d. no, the program will run and then give a syntax error once you hit the loop

Chapter 5 Quiz Starting Out With C++ 020

Which of the following is the best answer.  In a for loop, the counter can only be incremented or decremented by 1.

a. the counter can only be counter++ or counter--
b. no, you can do increment/decrement other than by 1.  counter+=2
c. yes

Chapter 5 Quiz Starting Out With C++ 019

Which of the following loop mechanisms are pretest loops in C++?

a. for loops
b. while loops
c. do while loops
d. a and c
e. a and b

Chapter 5 Quiz Starting Out With C++ 018

Can you use for-loop, do-while and while looping to perform identically?

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 017

Can you declare and initialize in a variable that will be used in the test expression?

for (int i=0; i<100; i++)
{
   //display the square of the numbers from 0 to 99
   cout << i*i << "\n";
}

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 016

Is the following a correct format for the for-loop?

for (initialization; test expression; update)
{
   statement;
   statement;
   .
   .
}

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 015

What are the steps involved in a for-loop in C++?

a. initialize, perform update expression, test expression, and finally execute body
b. execute body, initialize, perform update expression, test expression
c. initialize, execute body,  test expression, perform update expression
d. initialize, test expression, execute body, perform update expression

(remember the slide from 9/30/13)

Chapter 5 Quiz Starting Out With C++ 014

If you can determine ahead of time how many times a loop will be performed then a for-loop is commonly used.

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 013

How do you prevent infinite loops?

a. make sure you test at the beginning of the loop
b. make sure something inside the loop changes the test expression to false
c. make sure you have plenty of RAM
d. it is impossible to prevent infinite loops.
e. make sure something inside the loop changes the test expression to true

Chapter 5 Quiz Starting Out With C++ 012

Which of the following is an example of an infinite loop

a.
x=1;
while (x>=1)
   cout << "I'm in a loop";
b.
while infinite ()
   cout << "I'm in a loop";
c.
while ()
{
   cout << "I'm in a loop";
}

d.
x=10;
while (x >0)
{
   x--;
   cout << "I'm in a loop";
}

Chapter 5 Quiz Starting Out With C++ 011

The _____ is pretest loop and the _____ is a posttest loop

a. do-while loop, while loop
b. while loop, do-while loop
c. repeat loop, while loop
d. while loop, repeat loop

Chapter 5 Quiz Starting Out With C++ 010

The while loop is usually used when you know the exact number of times a loop will repeat

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 009

What is the format of the while loop in C++?

a.

while ( x >5)
do {
   y++;
}

b.

perform 
{
   y++;
} while (x >5)

c.

while (x >5)
{
   y++;
}

Chapter 5 Quiz Starting Out With C++ 008

A _____ is a part of a program that repeats

a. function
b. loop
c. repeat
d. branch statement

Chapter 5 Quiz Starting Out With C++ 007

Can you use increment or decrement in relationship expressions?

if (x++ > 10)
  cout << "Thanks for playing!";

a. true
b. false

Chapter 5 Quiz Starting Out With C++ 006

Given that x is 5 and y is 4 what will this code segment produce

z = ++(x + y);

a. 11
b. 10
c. a syntax error
d. a compilation error