How should I practice Build a Hollow Square?

Start by reading the full statement, solve the visible examples, then compare the pattern against related Visa online assessment problems in FastPrep.

Is Build a Hollow Square associated with Visa?

FastPrep tags this as a Visa online assessment coding practice problem when the problem catalog has that company and stage context.

Build a Hollow Square

Visa● EasyINTERNOA

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Problem statement

You are given an integer n. Build an n by n hollow square as a string array.

Every border position contains *.
Every interior position contains -.

Return the rows from top to bottom.

Function

buildHollowSquare(n: int) → String[]

Examples

Example 1

n = 4return = ["****","*--*","*--*","****"]

The first and last rows are all border characters. Each middle row has two border stars surrounding two interior dashes.

Example 2

n = 2return = ["**","**"]

A square of side two has no interior positions, so both rows contain only stars.

Constraints

2 <= n <= 1000
The returned output contains exactly n² characters.