Stream Input/Output

Question 1

Where does I/O occur?

Answer 1

In streams

Question 2

What is a stream?

Answer 2

A sequence of bytes

Question 3

Low level I/O

Answer 3

Device to memory

Question 4

High level I/O

Answer 4

Bytes grouped into units (ex: integers, strings)

Question 5

Unformatted vs formatted I/O

Answer 5

Unformatted is faster but difficult to use
Formatted requires extra processing time but is readable

Question 6

How to declare all stream I/O operations?

Answer 6

<iostream>
</iostream>

Question 7

How to declare parameterized stream manipulators?

Answer 7

<iomanip>
</iomanip>

Question 8

basic_istream and basic_ostream

Answer 8

Templates for input and output respectively

Question 9

Template that supports both input and output?

Answer 9

basic_iostream

Question 10

istream object cin tied to….

Answer 10

standard input device (keyboard)

Question 11

ostream cout tied to….

Answer 11

Standard output device (screen)

Question 12

Unbuffered ostream output?

Answer 12

cerr

Question 13

Buffered ostream output

Answer 13

clog

Question 14

How are data types determined for input and output?

Answer 14

Automatically by compiler

Question 15

How are addresses displayed?

Answer 15

Hexadecimal

Question 16

How can you print the address in a pointer variable?

Answer 16

Cast pointer to void*

Question 17

What member function outputs one character and can be cascaded?

Answer 17

put

Question 18

Properties of stream input stream extraction operator&raquo_space;

Answer 18

Automatically skips white space characters
Returns false after end of file encountered

Question 19

How to input series of values using stream extraction operation?

Answer 19

In a while looo

Question 20

Which member function inputs one character and returns character or EOF at end of file?

Answer 20

get

Question 21

What function reads line of string but removes the delimiter and does not store

Answer 21

getline

Question 22

How to skip specified number of characters in an input stream?

Answer 22

ignore member function

Question 23

How to place previous character obtained by get on a stream back into stream

Answer 23

putback

Question 24

Which function returns next character from input stream but does not extract from the stream?

Answer 24

peek

Question 25

What is type-safe I/O

Answer 25

Throws error when << >> has not been overloaded for a user defined type

Question 26

Which member functions input or output bytes to or from memory?

Answer 26

read and write

Question 27

Member function that returns number of characters input by previous read operation on stream

Answer 27

gcount

Question 28

If read inputs specified number of characters into character array, what is set if fewer than specified number are read?

Answer 28

failbit

Question 29

How to set a base to hexadecimal, octal, or decimal until declared otherwise?

Answer 29

Use hex, oct, and dec

Question 30

Which parameterized stream manipulator sets the base for integer output?

Answer 30

setbase Takes integer argument of 10, 8, or 16

Question 31

How can floating point precision be controlled?

Answer 31

precision member function Sticky

Question 32

How to set field width and return previous width? How long is it applicable?

Answer 32

width or setw Only applies for the next insertion or extraction

Question 33

How is setw different than width?

Answer 33

Breaks larger lines into chunks of that size

Question 34

Can you create your own stream manipulators?

Answer 34

Yes

Question 35

How to force floating point number to be output with decimal point?

Answer 35

showpoint stream manipulator

Question 36

Which stream manipulators left and right justify with padded characters?

Answer 36

left and right

Question 37

Which stream manipulator can indicate number's sign or base be left justified while magnitude is right justified?

Answer 37

internal

Question 38

How to specify fill character?

Answer 38

setfill or fill

Question 39

How to force base to be output?

Answer 39

showbase

Question 40

How to output floating point number in scientific format?

Answer 40

scientific

Question 41

How to output X for hexadecimals or E for scientific values?

Answer 41

uppercase