GATE 2021 CS (CS2) – Question 2

General Aptitude · Spatial Aptitude: Spatial Reasoning and Visualization · 1 mark · Multiple choice

A transparent square sheet is folded along the dotted vertical line, bringing the left half onto the right. Which option shows the folded sheet?

Diagram for GATE 2021 CS (CS2) question 2

Option A in the figure
Option B in the figure
Option C in the figure
Option D in the figure

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Show answer and explanation

Correct answer: (B) Option B in the figure

Explanation

Reflect each feature of the left half across the vertical fold, then superpose it on the unchanged right half. The curved left segment becomes the opposite boundary of a narrow lens. The two short marks on that segment reflect to the upper interior while the right-side marks remain in position. Only B has the correct combined shape and mark positions.

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