Your hostname is not set correctly in /etc/hosts. You should remove the following line altogether.
127.0.1.1 fatima1-HP-ProBook-4530s
Then add your actual IP address right after the localhost entry. Your /etc/hosts file should look like this.
NOTE: I am assuming this is the master, I may be wrong in which case replace it wiuth the actual IP address. Also check your destination machines /etc/hosts file as well.
127.0.0.1 localhost
192.168.1.10 fatima1-HP-ProBook-4530s
192.168.1.10 master
192.168.1.11 slave
the following lines are desirable for IPv6 capable hosts
::1 ip6-localhost ip6-loopback
fe00::0 ip6-localnet
ff00::0 ip6-mcastprefix
ff02::1 ip6-allnodes
ff02::2 ip6-allrouters
Once this has been completed you will need to reboot your machine and restart hadoop
EDIT:
Your core-site.xml has to have the correct master / slave entries as follows. You may have additional properties set within core-site.xml and that is fine. But in Distributed Mode you will need to specify a fs.default.name as a master or a slave.
<?xml version="1.0" encoding="UTF-8"?>
<?xml-stylesheet type="text/xsl" href="configuration.xsl"?>
<configuration>
<property>
<name>fs.default.name</name>
<value>hdfs://master:9000</value>
</property>
</configuration>