Question 1

Validate Binary Search Tree — sig Interview Question

Accepted Answer

"Validate Binary Search Tree" is a medium difficulty problem asked at sig interviews. It covers the following topics: Tree, Depth-First Search, Binary Search Tree, Binary Tree. You can practice it on LeetCode: https://leetcode.com/problems/validate-binary-search-tree

Question 2

Text Justification — sig Interview Question

Accepted Answer

"Text Justification" is a hard difficulty problem asked at sig interviews. It covers the following topics: Array, String, Simulation. You can practice it on LeetCode: https://leetcode.com/problems/text-justification

Question 3

Kth Largest Element in an Array — sig Interview Question

Accepted Answer

"Kth Largest Element in an Array" is a medium difficulty problem asked at sig interviews. It covers the following topics: Array, Divide and Conquer, Sorting, Heap (Priority Queue), Quickselect. You can practice it on LeetCode: https://leetcode.com/problems/kth-largest-element-in-an-array

Question 4

Add Binary — sig Interview Question

Accepted Answer

"Add Binary" is a easy difficulty problem asked at sig interviews. It covers the following topics: Math, String, Bit Manipulation, Simulation. You can practice it on LeetCode: https://leetcode.com/problems/add-binary

Question 5

Spiral Matrix — sig Interview Question

Accepted Answer

"Spiral Matrix" is a medium difficulty problem asked at sig interviews. It covers the following topics: Array, Matrix, Simulation. You can practice it on LeetCode: https://leetcode.com/problems/spiral-matrix

Question 6

Block Placement Queries — sig Interview Question

Accepted Answer

"Block Placement Queries" is a hard difficulty problem asked at sig interviews. It covers the following topics: Array, Binary Search, Binary Indexed Tree, Segment Tree. You can practice it on LeetCode: https://leetcode.com/problems/block-placement-queries

#	Question Title	Difficulty	Frequency	Topics
1	Validate Binary Search Tree	MEDIUM	100.0	TreeDepth-First SearchBinary Search Tree+1
2	Text Justification	HARD	92.2	ArrayStringSimulation
3	Kth Largest Element in an Array	MEDIUM	71.1	ArrayDivide and ConquerSorting+2
4	Add Binary	EASY	71.1	MathStringBit Manipulation+1
5	Spiral Matrix	MEDIUM	71.1	ArrayMatrixSimulation
6	Block Placement Queries	HARD	71.1	ArrayBinary SearchBinary Indexed Tree+1
7	Number of Black Blocks	MEDIUM	71.1	ArrayHash TableEnumeration

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