selection

Question 2

What does the conditional (age <= 5) ? “Infant” : (age <= 12) ? “Child” : … represent?

Answer 2

It uses the ternary operator to assign an age group based on the age input.

Question 3

Rewrite a nested ternary operator using if…else if…else.

Answer 3

if (age <= 5) AgeGroup = “Infant”;
else if (age <= 12) AgeGroup = “Child”;
…

Question 4

What is the purpose of switch statements in selection?

Answer 4

To simplify multiple conditional branches comparing a single variable.

Question 5

What operator is used for combining conditions?

Answer 5

Logical operators like &&, ||.

Question 6

What is the output of: (x > 10) && (x < 75) if x = 20?

Answer 6

true

Question 7

When should you use else if instead of separate if blocks?

Answer 7

When conditions are mutually exclusive.

Question 8

Which statement assigns “PASS” if average is 55?

Answer 8

if (avg < 60) grade = “PASS”;

Question 9

What is a nested if statement?

Answer 9

An if statement inside another if.

Question 10

How would you write a simple grade classifier using if?

Answer 10

if (avg < 50) grade = “FAIL”;
else if (avg < 60) grade = “PASS”;

Question 11

Can switch be used with strings in C#?

Answer 11

Yes, C# supports switch on strings.