The fundamental operations in a double-ended queue D are :
insertFirst (e) - Insert a new element e at the beginning of D.
insertLast (e) - Insert a new element e at the end of D.
removeFirst () - Remove and return the first element of D.
removeLast () - Remove and return the last element of D.
In an empty double-ended queue, the following operations are performed :
insertFirst (10)
insertLast (32)
a ← removeFirst()
insertLast (28)
insertLast (17)
a ←removeFirst()
a ← removeLast ()
The value of a is _______.
insertFirst (e) - Insert a new element e at the beginning of D.
insertLast (e) - Insert a new element e at the end of D.
removeFirst () - Remove and return the first element of D.
removeLast () - Remove and return the last element of D.
In an empty double-ended queue, the following operations are performed :
insertFirst (10)
insertLast (32)
a ← removeFirst()
insertLast (28)
insertLast (17)
a ←removeFirst()
a ← removeLast ()
The value of a is _______.
Correct Answer: 17
Solution and Explanation
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