1. Stack is az a. Is a linear data structure, where insertion and deletion happens at same end. b. Is a non-linear data structure, where insertion and deletion happens at separate ends. c. Is a linear data structure, where PUSH and POP happens at separate ends. d. Is a non-linear data structure, where insertion and deletion happens at same end. 2. The Queue data structure follows _ principle: a. First-in-First-Out (FIFO). b. Last-in-First-Out (LIFO). c. First-in-Last-Out (FILO). d. First-in-Mid-Out (FIMO). 3. A data structure is one that has another version of itself as a component. a. Linear. b. Array. c. Linked list. d. Recursive. 4. In Java, an interface has below property: a. Weak form of multiple inheritance. b. Not a class. c. Not an abstract class. d. All the above 5. Methods in the class hierarchy which have identical name, number and types of parameters in the same order is called a. Overloading b. Overriding c. Data abstraction d. Encapsulation