|1600 PMP mock questions||1400 CAPM mock questions||800 SCJP 6 mock questions||600 OCAJP 7 mock questions||590 OCPJP 7 mock questions||556 SCWCD 5 mock questions||500 OCEJWCD 6 mock questions||pdfDownload (java,struts, hibernet etc)|
C C++ interview questions
!!! C C++ interview questions !!!
What is reference ??
reference is a name that acts as an alias, or alternative name, for a previously defined variable or an object. prepending variable with "&" symbol makes it as reference. for example:
int &b = a;
What is passing by reference?
Method of passing arguments to a function which takes parameter of type reference. for example:
void swap( int & x, int & y )
int temp = x;
x = y;
y = x;
int a=2, b=3;
swap( a, b );
Basically, inside the function there won't be any copy of the arguments "x" and "y" instead they refer to original variables a and b. so no extra memory needed to pass arguments and it is more efficient.
Reviews and Comments
PMP, CAPM, PMI is a registered certification mark of the Project Management Institute, Inc
Copyright © www.techfaq360.com 2016