Answer to Question #22426 in Perl for Sandeep Saxena

Question #22426
Ques 1: What is -> Symbol in Perl? a) '->' symbol is used to refer hash values b) In object oriented PERL the arrow -> symbol is used for creating or accessing a particular object of a class c) Arrow operator -> is used for dereferencing references to array or hash e.g $arr = ['1', '2' ,'3', '4']; To retrieve the value of first element: $val = $arr->[1]; d) All of the above are correct Ques 2: How do you open a file for writing? a) open (”FH”, “>filename.dat”) || die “Can’t create the file\n”; Later use FH to perform all file related operation. b) open (”FH”, “<filename.dat”) || die “Can’t create the file\n”; Later use FH to perform all file related operation. c) open (”FH”, “filename.dat”) || die “Can’t create the file\n”; Later use FH to perform all file related operation. d) All are same.
Expert's answer
Question 1:The correct answer is b).If you have an object $a of class MyClass, and classMyClass has property "prop", and method "meth", then one
can access to them as follows:
$a->prop
$a->meth()
Question 2:
The correct answer is a), where symbol ">"is used.
In the case b), with symbol "<" file will beopened for reading,
while case c) is incorrect.

Need a fast expert's response?

Submit order

and get a quick answer at the best price

for any assignment or question with DETAILED EXPLANATIONS!

Comments

No comments. Be first!

Leave a comment

Ask Your question

LATEST TUTORIALS
New on Blog
APPROVED BY CLIENTS
paypal