Everyone has some preferences. Someone likes vanilla ice cream, while someone else prefers strawberry sorbet. It is the same with people. Some of us like to work with children, while some of us prefer to work with alcoholics. Some individuals with special motivation even choose groups such as drug addicts, or homeless.
Recruiters try to find out why you are interested in the particular field of social work. In a good answer, you should simply mention that you feel close to the target group, or to the job itself (to the nature of the job). Alternatively you can point to personal experience with the target group.
Anyway, it does not matter what group of people you speak about, you should always speak with love and compassion, as it reflects your feelings for these people.
Sample answers for different fields of social work
I want to work with the orphans, as I believe children need role models in their life. What is more, nearly all addictions have roots in childhood. I believe that I can change a lot in the world working with orphans, and that is why I chose this field.
I was homeless myself four years ago, when I got into serious financial problems. It was the most difficult period of my life. I tried it on my own skin, so I know how these people feel, what they think, and most importantly what they need. That is the reason for my preference.
The population of old people in our country is growing every year. I believe there is nothing worse than solitude, especially when one is old. I want to help the old people to find new challenges and purpose in life, and I believe I am good in communication with them.
I am not a practical person. I would love to go out to people and help, but my social skills are not good enough for doing it. However, the inner calling is strong, and I want to help the weak. I believe that my place is in a sphere of social research. I can satisfy my inner calling to help the others while working in this field.
There is a good answer for every field you may choose. Do not be afraid to be emotional, to talk about your past, and personal reasons. It can only help you in this interview.