Quiz - 10 on switch in C

What is the syntax for a switch statement in C?

• switch { case constant1: // statements break; case constant2: // statements break; default: // default statements }

• switch(expression) { case constant1: // statements break; case constant2: // statements break; case constant3: // statements break; default: // default statements }

• switch(expression) { case constant1: // statements break; case constant2: // statements break; default: // default statements }

• switch(expression) { case constant1: // statements break; case constant2: // statements break; default: // default statements }

What is the purpose of a switch statement in C?

• To handle exceptions in the program

• To calculate mathematical operations

• To control the flow of the program based on the value of a variable.

• To print text on the screen

Predict the output of the following code: #include int main() { int num = 2; switch(num) { case 1: printf("One"); break; case 2: printf("Two"); break; case 3: printf("Three"); break; default: printf("Default"); } return 0; }

• Four

• Three

• One

• Two

What is a common mistake to avoid when using a switch statement in C?

• Not providing a 'case' for all possible values

• Forgetting to include a 'break' statement

• Including multiple 'default' cases

• Using 'if-else' statements instead

In a switch statement, what happens if a break statement is omitted?

• The switch statement will automatically insert a break at the end of the block

• The switch statement will throw an error

• The control will fall through to subsequent cases until a break is encountered or the switch statement ends.

• The switch statement will skip to the default case

What is the default case used for in a switch statement?

• It is used to specify the data type of the switch statement variable.

• It is used to provide an alternative condition for the switch statement.

• It is used to define the starting point of the switch statement.

• It is used as a catch-all option.

Predict the output of the following code: #include int main() { char grade = 'B'; switch(grade) { case 'A': printf("Excellent"); break; case 'B': printf("Good"); break; case 'C': printf("Average"); break; default: printf("Fail"); } return 0; }

• Pass

• Good

• Average

• Excellent

How does a switch statement differ from an if-else statement in C?

• A switch statement can be used for nested conditions, unlike if-else statements.

• A switch statement can only handle boolean conditions, unlike if-else statements.

• A switch statement always requires a default case, unlike if-else statements.

• A switch statement is more efficient when dealing with multiple conditions compared to multiple if-else statements.

What is the role of the 'case' keyword in a switch statement?

• The 'case' keyword in a switch statement is used to declare a default case

• The 'case' keyword in a switch statement is used to terminate the switch block

• The 'case' keyword in a switch statement is used to assign a value to a variable

• The role of the 'case' keyword in a switch statement is to define different possible values that a variable can have and the code to execute if the variable matches that value.

Predict the output of the following code: #include int main() { int x = 5; switch(x) { case 1: printf("One"); break; case 2: printf("Two"); break; case 5: printf("Five"); break; default: printf("Default"); } return 0; }

• Four

• Five

• Seven

• Six