Question 1

__________ is usually faster than __________.

Accepted Answer

A)  High-level I/O, low-level I/O. 
B)  Low-level I/O, high-level I/O. 
C)  Low-level I/O, internal data processing. 
D)  High-level I/O, internal data processing. 
A)  High-level I/O, low-level I/O. 
B)  Low-level I/O, high-level I/O. 
C)  Low-level I/O, internal data processing. 
D)  High-level I/O, internal data processing. B

Question 2

Which of the following is not an object of the ostream class?

Accepted Answer

A)  cout 
B)  cerr 
C)  cin 
D)  clog 
A)  cout 
B)  cerr 
C)  cin 
D)  clog C

Question 3

Which C++ data type was designed to store Unicode characters?

Accepted Answer

A)  char 
B)  long 
C)  wchar_t 
D)  size_t 
A)  char 
B)  long 
C)  wchar_t 
D)  size_t C

Question 4

Which of the following prints the address of character string string given the following declaration? char* string{"test"};

Accepted Answer

A) cout << string; B) cout << *&string; C) cout << static_cast(string); D) cout << *string; A) cout << string; B) cout << *&string; C) cout << static_cast(string); D) cout << *string;

Question 5

Which of the following statements is not true about C++ input/output (I/O) features?

Accepted Answer

A)  C++ allows users to specify I/O for their own data types. 
B)  C++ automatically calls the correct I/O operations for standard types. 
C)  C++ has some object-oriented I/O features. 
D)  C++ borrowed its type safe I/O capabilities from C. 
A)  C++ allows users to specify I/O for their own data types. 
B)  C++ automatically calls the correct I/O operations for standard types. 
C)  C++ has some object-oriented I/O features. 
D)  C++ borrowed its type safe I/O capabilities from C.

Question 6

When the showbase flag is set:

Accepted Answer

A)  The base of a number precedes it in brackets. 
B)  Decimal numbers are not output any differently. 
C)  "oct" or "hex" will be displayed in the output stream. 
D)  Octal numbers can appear in one of two ways. 
A)  The base of a number precedes it in brackets. 
B)  Decimal numbers are not output any differently. 
C)  "oct" or "hex" will be displayed in the output stream. 
D)  Octal numbers can appear in one of two ways.

Question 7

Which of the following is not a difference between hex and setbase?

Accepted Answer

A)  setbase is a parameterized stream manipulator and hex is not. 
B)  setbase is provided by a different header file than hex. 
C)  setbase(16) and hex have different effects on stream output. 
D)  setbase takes an argument but hex does not. 
A)  setbase is a parameterized stream manipulator and hex is not. 
B)  setbase is provided by a different header file than hex. 
C)  setbase(16) and hex have different effects on stream output. 
D)  setbase takes an argument but hex does not.

Question 8

Which of the following stream manipulators causes an outputted number's sign to be left justified, its magnitude to be right justified and the center space to be filled with fill characters?

Accepted Answer

A)  left 
B)  right 
C)  internal 
D)  showpos 
A)  left 
B)  right 
C)  internal 
D)  showpos

Question 9

Which of the following is not true about setw and width?

Accepted Answer

A)  If the width set is not sufficient the output prints as wide as it needs. 
B)  They are used to set the field width of output. 
C)  Both of them can perform two tasks, setting the field width and returning the current field width. 
D)  They only apply for the next insertion/extraction. 
A)  If the width set is not sufficient the output prints as wide as it needs. 
B)  They are used to set the field width of output. 
C)  Both of them can perform two tasks, setting the field width and returning the current field width. 
D)  They only apply for the next insertion/extraction.

Question 10

Untying an input stream, inputStream, from an output stream, outputStream, is done with the function call:

Accepted Answer

A)  inputStream.untie(). 
B)  inputStream.untie(&outputStream). 
C)  inputStream.tie(). 
D)  inputStream.tie(0). 
A)  inputStream.untie(). 
B)  inputStream.untie(&outputStream). 
C)  inputStream.tie(). 
D)  inputStream.tie(0).

Question 11

What will be output by the following statements? double x{.0012345};
Cout << fixed << x << endl;
Cout << scientific << x << endl;

Accepted Answer

A)  1.234500e-03 0.001234 
B)  1.23450e-03 0.00123450 
C)  .001234 1.234500e-03 
D)  0.00123450 1.23450e-03 
A)  1.234500e-03 0.001234 
B)  1.23450e-03 0.00123450 
C)  .001234 1.234500e-03 
D)  0.00123450 1.23450e-03

Question 12

To reset the format state of the output stream:

Accepted Answer

A)  Call the reset member function. 
B)  Call the flags member function with the ios_base::fmtflags constant as the argument. 
C)  Save a copy of the fmtflags value returned by calling member function flags before making any format changes, and then call flags again with that fmtflags value as the argument. 
D)  You must manually apply each individual format change member function or stream manipulator to restore the default format state. 
A)  Call the reset member function. 
B)  Call the flags member function with the ios_base::fmtflags constant as the argument. 
C)  Save a copy of the fmtflags value returned by calling member function flags before making any format changes, and then call flags again with that fmtflags value as the argument. 
D)  You must manually apply each individual format change member function or stream manipulator to restore the default format state.

Question 13

Select the false statement. Outputs are:

Accepted Answer

A)  Flushed automatically at the end of a program. 
B)  Flushed when the buffer fills. 
C)  Able to be synchronized with inputs. 
D)  Never automatically tied to inputs. 
A)  Flushed automatically at the end of a program. 
B)  Flushed when the buffer fills. 
C)  Able to be synchronized with inputs. 
D)  Never automatically tied to inputs.

Question 14

One difference between the three-argument version of the get function and the getline function is that:

Accepted Answer

A)  Only get has a delimiter. 
B)  The getline function removes the delimiter from the stream. 
C)  Only get adds the delimiter to the array. 
D)  getline stores the characters it reads into its character array argument. 
A)  Only get has a delimiter. 
B)  The getline function removes the delimiter from the stream. 
C)  Only get adds the delimiter to the array. 
D)  getline stores the characters it reads into its character array argument.

Question 15

If unexpected data is processed in an I/O operation:

Accepted Answer

A)  An exception will be thrown. 
B)  An error message will automatically be displayed. 
C)  The program will terminate execution. 
D)  Various error bits will be set. 
A)  An exception will be thrown. 
B)  An error message will automatically be displayed. 
C)  The program will terminate execution. 
D)  Various error bits will be set.

Question 16

Which of the following is an illegal use of function put?

Accepted Answer

A)  cout.put('A'); 
B)  cout.put("A"); 
C)  cout.put('A').put('
'); 
D)  cout.put(65); 
A)  cout.put('A'); 
B)  cout.put("A"); 
C)  cout.put('A').put('
'); 
D)  cout.put(65);

Question 17

Which of the following is a valid user-defined output stream manipulator header?

Accepted Answer

A)  ostream& tab(ostream& output) 
B)  ostream tab(ostream output) 
C)  istream& tab(istream output) 
D)  void tab(ostream& output) 
A)  ostream& tab(ostream& output) 
B)  ostream tab(ostream output) 
C)  istream& tab(istream output) 
D)  void tab(ostream& output)

Question 18

The good member function will return false if:

Accepted Answer

A)  The eof member function would return true. 
B)  The bad member function would return true. 
C)  The failbit member function would return true. 
D)  Any of the above. 
A)  The eof member function would return true. 
B)  The bad member function would return true. 
C)  The failbit member function would return true. 
D)  Any of the above.

Question 19

The putback member function returns to the input stream the previous character obtained by:

Accepted Answer

A)  A get from the input stream. 
B)  Using the stream extraction operator on the input stream. 
C)  Reading input from the keyboard. 
D)  Reading a file from disk. 
A)  A get from the input stream. 
B)  Using the stream extraction operator on the input stream. 
C)  Reading input from the keyboard. 
D)  Reading a file from disk.

Question 20

Which of the following is not true about bool values and how they're output with the output stream?

Accepted Answer

A)  The old style of representing true/false values used -1 to indicate false and 1 to indicate true. 
B)  A bool value outputs as 0 or 1 by default. 
C)  Stream manipulator boolalpha sets the output stream to display bool values as the strings "true" and "false". 
D)  Both boolalpha and noboolalpha are "sticky" settings. 
A)  The old style of representing true/false values used -1 to indicate false and 1 to indicate true. 
B)  A bool value outputs as 0 or 1 by default. 
C)  Stream manipulator boolalpha sets the output stream to display bool values as the strings "true" and "false". 
D)  Both boolalpha and noboolalpha are "sticky" settings.

Exam 13: Stream Inputoutput: a Deeper Look

__________ is usually faster than __________.

Which of the following is not an object of the ostream class?

Which C++ data type was designed to store Unicode characters?

Which of the following prints the address of character string string given the following declaration? char* string{"test"};

Which of the following statements is not true about C++ input/output (I/O) features?

When the showbase flag is set:

Which of the following is not a difference between hex and setbase?

Which of the following stream manipulators causes an outputted number's sign to be left justified, its magnitude to be right justified and the center space to be filled with fill characters?

Which of the following is not true about setw and width?

Untying an input stream, inputStream, from an output stream, outputStream, is done with the function call:

What will be output by the following statements? double x{.0012345}; Cout << fixed << x << endl; Cout << scientific << x << endl;

To reset the format state of the output stream:

Select the false statement. Outputs are:

One difference between the three-argument version of the get function and the getline function is that:

If unexpected data is processed in an I/O operation:

Which of the following is an illegal use of function put?

Which of the following is a valid user-defined output stream manipulator header?

The good member function will return false if:

The putback member function returns to the input stream the previous character obtained by:

Which of the following is not true about bool values and how they're output with the output stream?

Introduction to Computers and C++

Introduction to C Programming; Inputoutput and Operators

Introduction to Classes, Objects and Strings

Control Statements, Assignment, and Operators

Control Statements, Logical Operators

Functions and an Introduction to Recursion

Class Templates Array and Vector; Catching Exceptions

Pointers and Pointer-Based Strings

Classes: a Deeper Look; Throwing Exceptions

Operator Overloading; String and Array Objects

Object-Oriented Programming: Inheritance

Object-Oriented Programming: Polymorphism

File Processing

Standard Library Containers and Iterators

Standard Library Algorithms

Exception Handling: a Deeper Look

Introduction to Custom Templates

Custom Templatized Data Structures

Searching and Sorting

Class String and String Stream Processing

Bits, Characters, C Strings and Structs

Other Topics

C++11 Additional Features

Filters

is usually faster than .