Computer Science and C++ Quiz Answers, Page 5

Question #41

What does the following code do? void afunction(int *x)
{
x=new int;
*x=12;
}
int main()
{
int v=10;
afunction(&v);
cout<<v;
}

Outputs 12
Outputs 10
Outputs the address of v

Question #42

To what value do nonglobal variables default?

auto
register
static

Question #43

Which header file allows file I/O with streams?

iostream
fstream
fileio.h

Question #44

What is the outcome of the line of code "cout<<abs(-16.5);"?

16
17
16.5

Question #45

What value will "strcmp("Astring", "Astring");" return?

A positive value
A negative value
Zero

Question #46

Evaluate !(1&&1||1&&0)

Error
True
False

Question #47

What header file is needed for the function exit()?

stdlib.h
conio.h
dos.h

Question #48

What ANSI C++ function clears the screen?

clrscr()
clear()
There is no function, defined by the ANSII C++ standard, which will clear the screen

Question #49

When run on a computer, will a recursive function without an end condition ever quit?

Compiler-Specific (Some compilers can convert these functions to infinite loops)
No
Yes

Question #50

How long does the following code run? for(int x=0; x=3; x++)

Never
Three times
Forever

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