Oct, hex and dec

Question: When used, the _________ stream manipulator causes positive numbers to

display with a plus sign.

Showpos

Question: The stream member function flags with a long argument sets the flags state

variable to its argument and returns its previous value.

False

Question: The stream insertion operator << and the stream-extraction operator >> are

overloaded to handle all standard data typesincluding strings and memory addresses

(stream-insertion only)and all user-defined data types.

False

Question: The stream member function flags with no arguments resets the stream's

format state

False

Question: The stream extraction operator >> can be overloaded with an operator function

that takes an istream reference and a reference to a user-defined type as arguments and

returns an istream reference.

True

Question: The stream insertion operator << can be overloaded with an operator function

that takes an istream reference and a reference to a user-defined type as arguments and

returns an istream reference

False

Question: Input with the stream extraction operator >> always skips leading white-space

characters in the input stream, by default

True

Question: The stream member function rdstate returns the current state of the stream

True

Question: The cout stream normally is connected to the display screen

True

Question: The stream member function good returns TRUE if the bad, fail and eof

member functions all return false

True

Question: The cin stream normally is connected to the display screen

False

Question: If a nonrecoverable error occurs during a stream operation, the bad member

function will return TRue

True

Question: Output to cerr is unbuffered and output to clog is buffered

True

Question: Stream manipulator showpoint forces floating-point values to print with the

default six digits of precision unless the precision value has been changed, in which case

floating-point values print with the specified precision

True

Question: The ostream member function put outputs the specified number of characters

False

Question: The stream manipulators dec, oct and hex affect only the next integer output

operation

False

Question: By default, memory addresses are displayed as long integers

falseQuestion: Output the string "Enter your name: "

cout << "Enter your name: ";

Question: Use a stream manipulator that causes the exponent in scientific notation and

the letters in hexadecimal values to print in capital letters

cout << uppercase;

Question: Output the address of the variable myString of type char *

cout << static_cast< void * >( myString );

Question: Use a stream manipulator to ensure floating-point values print in scientific

notation

cout << scientific;

Question: Output the address in variable integerPtr of type int *.

cout << integerPtr;

Question: Use a stream manipulator such that, when integer values are output, the

integer base for octal and hexadecimal values is displayed.

cout << showbase;

Question: Output the value pointed to by floatPtr of type float *.

cout << *floatPtr;

Question: Use a stream member function to set the fill character to '*' for printing in field

widths larger than the values being output. Write a separate statement to do this with a

stream manipulator

cout.fill( '*' );

cout << setfill( '*' );

Question: Output the characters '0' and 'K' in one statement with ostream function put

cout.put( '0' ).put( 'K' );

Question: Member function read cannot be used to read data from the input object cin

False

Question: The programmer must create the cin, cout, cerr and clog objects explicitly

False

Question: A program must call function close explicitly to close a file associated with an

ifstream, ofstream or fstream object.

False

Question: If the file-position pointer points to a location in a sequential file other than

the beginning of the file, the file must be closed and reopened to read from the beginning

of the file

False

Question: The ostream member function write can write to standard-output stream cout

True

Question: Data in sequential files always is updated without overwriting nearby data

False

Question: Searching all records in a random-access file to find a specific record is

unnecessary

True

Question: Records in random-access files must be of uniform length

False

Question: Member functions seekp and seekg must seek relative to the beginning of a

file

False

Question: A selection sort application would take approximately ________ times as long

to run on a 128-element vector as on a 32-element vector.