Answer Posted / prabhath kota

As friends said above, its otherwise called as associative
array. It has lot of advantages over perl.

Here we can keep the values in a structured way, that
structured way comes from key-value pairs.

Eg: (The syntax given above are also correct, but the below
representation is much better in look and feel)

my %hash_example = ( a => 10,
b => 20,
c => 30 );
keys : a,b,c
values : 10,20,30

Features of Hash :
##################
1) Keys should always be unique where as values may not be
unique

(Right)
my %hash_example = ( a => 10,
b => 10,
c => 10 );

(wrong)
my %hash_example = ( a => 10,
a => 20,
a => 30 );

2) keys (%hash_example) will return an array containing only
keys

my @keys = keys(%hash);

3) similary for values
my @values = keys(%values);

List the prefix dereferencer in Perl.

572

---

What does a die() function do in perl?

543

---

Which of these is a difference between Perl and C++ ?

570

---

What is the use of -n and -p options?

604

---

Which functions in Perl allows you to include a module file or a module and what is the difference between them?

525

---

---

Is there any way to add two arrays together?

574

---

How to create a directory in perl?

530

---

Which statement has an initialization, condition check and increment expressions in its body? Write a syntax to use that statement.

547

---

What is the difference between perl list and perl array?

471

---

I have one question regarding to eval function. I know eval function is use for error checking but I am not able to understand below line. eval \'exec perl -S $0 ${1+\"$@\"}\' if 0; $0 for script name $@ set if error occur

1612

---

Can inheritance be used in perl?

553

---

What is the purpose of goto expr statement?

480

---

What are the different string manipulation operators in perl?

534

---

You want to download the contents of a url with perl. How would you do that?

505

---

Differentiate between use and require, my and local, for and foreach and exec and system

485

---