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: Entries below the main diagonal are all 0.
- Lower Triangular: Entries above the main diagonal are all 0.
- Null/Zero matrix: All entries are 0.
Step 2: Match definition to description.
Entries above the main diagonal are all 0 → Lower Triangular