Learn Java from Scratch - A Beginner's Guide - Step 25 - Java Conditionals and If Statement - Exercise Solutions

The video tutorial covers three exercises involving if statements in programming. The first exercise checks if the sum of two variables is greater than another sum. The second exercise verifies if three angles form a valid triangle, highlighting the importance of using comparison operators instead of assignment operators. The third exercise demonstrates how to determine if a number is even using the modulus operator. Each exercise is explained with examples and common errors are addressed.

What is the result of the comparison if A=1, B=2, C=3, and D=1 in the statement A+B > C+D?

• False, because 1+2 is not greater than 3+1

• False, because 1+2 is less than 3+1

• True, because 1+2 is greater than 3+1

• True, because 1+2 is equal to 3+1

Which operator should be used to compare two values for equality in programming?

• Single equals (=)

• Double equals (==)

• Triple equals (===)

• Not equals (!=)

What is the correct way to check if the sum of angles in a triangle equals 180?

• Using a plus sign

• Using a double equals sign

• Using a minus sign

• Using a single equals sign

What will be the output if angle1=20, angle2=60, and angle3=50 in the triangle validation check?

• No output

• Error in code

• Invalid triangle

• Valid triangle

What does the modulus operator (%) return when used with an even number?

• 0

• 1

• The number itself

• An error

If a number is odd, what will be the result of number % 2?

• 0

• 1

• The number itself

• 2

Which of the following numbers will return 0 when using the modulus operator with 2?

• 7

• 9

• 10

• 11