Question

A square matrix having all the elements above the leading diagonal equal to zero is known as:

• A. Null Matrix
• B. Zero Matrix
• C. Upper Triangular Matrix
• D. Lower Triangular Matrix

Hint:

Remember: "Upper → zeros below, Lower → zeros above".

Answer 1

The Correct Option is D

Step 1: Review Matrix Definitions
- Upper Triangular Matrix: Elements below the main diagonal are all 0.
- Lower Triangular Matrix: Elements above the main diagonal are all 0.
- Null/Zero Matrix: All elements are 0.

Step 2: Identify the Matrix Type
If all elements above the main diagonal are 0, then it is a Lower Triangular Matrix.