Instructions

  • 1. Your final score will reflect your grasp of the concepts—approach each question with precision.
  • 2. Thoroughly review each solution before proceeding to ensure full understanding.
  • 3. Final results will be available after submission to provide insights into areas for further improvement.
  • 4. Maintain academic integrity—plagiarism undermines learning and professional growth.
  • 5. Once submitted, responses are final, so ensure you’re confident in your answers.
  • 6. These challenges are designed to test practical knowledge; apply your skills as you would in real-world scenarios.

All Problems

Question

Action

1. Which of the following Map implementations maintains the insertion order of its entries?

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2. Which method in Queue is used to add an element to the queue but throws an exception if the queue is full?

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3. Which method would you use to get all the key-value mappings from a Map?

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4. Which queue implementation has the fastest performance for adding and removing elements at the ends?

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5. In which of the following scenarios would you use ConcurrentLinkedQueue?

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6. Which Map implementation stores keys in sorted order according to their natural ordering or a comparator?

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7. Which method in Queue is used to retrieve and remove the front element, and blocks if the queue is empty?

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8. Which of the following is true about HashMap?

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9. What will happen if you try to insert a duplicate key into a Map?

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10. What will the poll() method of PriorityQueue return when the queue is empty?

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1. Which of the following Map implementations maintains the insertion order of its entries?

HashMap
TreeMap
LinkedHashMap
ConcurrentHashMap

2. Which method in Queue is used to add an element to the queue but throws an exception if the queue is full?

insert()
put()
offer()
add()

3. Which method would you use to get all the key-value mappings from a Map?

keySet()
values()
entrySet()
mapView()

4. Which queue implementation has the fastest performance for adding and removing elements at the ends?

LinkedList
ArrayDeque
PriorityQueue
ConcurrentLinkedQueue

5. In which of the following scenarios would you use ConcurrentLinkedQueue?

<p>&nbsp;</p>

When you need a thread-safe, non-blocking queue for concurrent access.
When you need to store elements in sorted order.
When you need to add elements in a priority order.
None of the above.

6. Which Map implementation stores keys in sorted order according to their natural ordering or a comparator?

HashMap
LinkedHashMap
TreeMap
ConcurrentHashMap

7. Which method in Queue is used to retrieve and remove the front element, and blocks if the queue is empty?

poll()
peek()
take()
element()

8. Which of the following is true about HashMap?

It is thread-safe.
It preserves insertion order.
It does not allow null values.
It does not guarantee any specific order of its elements.

9. What will happen if you try to insert a duplicate key into a Map?

It will overwrite the existing value.
It will throw an exception.
It will ignore the duplicate key.
None of the above.

10. What will the poll() method of PriorityQueue return when the queue is empty?

null
0
Exception
false