| Column 1 | Column 2 | ||
| (p) | First In First Out | (i) | Stacks |
| (q) | Lookup Operation | (ii) | Queues |
| (r) | Last In First Out | (iii) | Hash Tables |
| List I | List II | ||
|---|---|---|---|
| 1 | FIFO | a | Stack |
| 2 | Look up op. | b | Queue |
| 3 | Last-In first out | c | Hash table |
Fill in the blank with the correct option.
The teacher believed that the student’s sudden lack of interest in class was an ..........., as he had always been enthusiastic and attentive.