Programming and Data Structures · Linear Structures, Trees and Heaps
Official IIT answer key · IIT Guwahati · Audited Aug 2026
GATE CSE 2025 Set 2 Q38 · MCQ · 2 marks
A meld operation on two instances of a data structure combines them into one single instance of the same data structure. Consider the following data structures: P: Unsorted doubly linked list with pointers to the head node and tail node of the list. Q: Min-heap implemented using an array. R: Binary Search Tree.
Key concept
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Topic notes
Across the provided GATE CS papers, this topic evaluates foundational data structures with an emphasis on implementation mechanics, boundary conditions, and asymptotic time complexities of core and advanced operations. Earlier questions focus directly on array-based circular queue pointer conditions and basic operation bounds (O(1) enqueue/dequeue). Recent questions test deep algorithmic understanding of multi-step operations like melding across disparate data structures such as doubly linked lists, binary heaps, and binary search trees.
Full Linear Structures, Trees and Heaps guide →A meld operation on two instances of a data structure combines them into one single instance of the same data structure. Consider the following data structures: P: Unsorted doubly linked list with pointers to the head node and tail node of the list. Q: Min-heap implemented using an array. R: Binary Search Tree. Which ONE of the following options gives the worst-case time complexities for meld operation on instances of size n of these data structures?
Topic-wise GATE CS PYQs with verified steps
Independent practice explanation verified by the GateAI team. GATE is conducted by the IITs; question text follows the official paper.
