1. Local variable
Jeena Yahan Marna Yahan,
Iske siva Jana kaahan.
2. Global variable
Musafir hoon yaaron,
na ghar hai na thikana
3. Null pointers
Mera jeevan kora kagaz kora hi reh gaya ..
4. Dangling pointers
Maut bhi aati nahi jaan bhi jati nahin.
5. The debugger
Jab koi...