COMPUTER SCIENCE AND ENGINEERING
DATA STRUCTURES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ABCD
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DCBA
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DCAB
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ABDC
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Detailed explanation-1: -If the elements “A”, “B”, “C” and “D” are placed in a queue and are deleted one at a time, in what order will they be removed? Explanation: Queue follows FIFO approach. i.e. First in First Out Approach. So, the order of removal elements are ABCD.
Detailed explanation-2: -The restrictions on queue imply that the first element which is inserted into the queue will be the first one to be removed. Thus A is the first letter to be removed, and queues are known as First In First Out (FIFO) lists.
Detailed explanation-3: -Answer: Option (d) DCBA In the queue data structure, that follows the principle of FIFO(First In First Out) where the items are placed first, those are removed first. Hence, the characters D is inserted first, then C, then B, and finally A is inserted and removed in the order D, C, B, and A.
Detailed explanation-4: -In the queue only two operations are allowed enqueue and dequeue. Enqueue means to insert an item into the back of the queue, dequeue means removing the front item.
Detailed explanation-5: -Deletion from queue Whenever any element is deleted from queue, it is always done from front position. Element pointed out by front variable is deleted (if needed or left as it is) and value of front is incremented by 1.