The video tutorial covers the use of while loops with logical operators, demonstrating how to combine them effectively to meet specific criteria. It then transitions into implementing a grading system using if-else statements, detailing the logic for assigning grades based on marks. A dry run of the grading logic is performed to illustrate how conditions are evaluated. Finally, the video addresses handling invalid input, ensuring the system prompts for valid marks within a specified range.

What is the purpose of using logical operators in while loops?

• To increase the loop's execution speed

• To combine conditions for breaking the loop

• To decrease the loop's memory usage

• To make the loop run indefinitely

Which grade is assigned if the marks are greater than 90?

• B grade

• C grade

• A grade

• D grade

What happens if the marks are exactly 70?

• No grade is assigned

• A grade is assigned

• B grade is assigned

• C grade is assigned

How does the program respond to a negative mark input?

• It ends the program

• It assigns a D grade

• It assigns an F grade

• It prompts to re-enter the marks

If a student scores 55, which grade will they receive?

• A grade

• D grade

• B grade

• C grade