Class Diagram of Collection in java
Q1.Difference between Collection and Collections?
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Q2.What is fail-safe and fail-fast in the collection?
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Q3.Difference between Array and Vector?
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Q4.Difference between ArrayList and LinkedList?
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Q5.Difference between ArrayList and Array?
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Q6.Difference between List and Set?
Ans.| List | Set |
|---|---|
| The list is ordered or sequential. | Set is unordered |
| The list can have duplicate elements. | Set will keep only distinct elements. |
| The list can have multiple null values | Set can have a single null value. |
| It can have positional access. | We can not have positional access. |
| Implemented using ArrayList, LinkedList, Vector. | Implemented using HashSet,LinkedHashSet,TreeSet |
Q7.Difference between List and Map?
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Q8.Difference between List and Queue?
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Q9.Difference between HashMap and HashTable?
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Q10.Difference between HashMap and HashSet?
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Q11.Insertion order in hashMap and HashTable?
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Q12.Difference between hashmap, treemap and LinkedHashmap?
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