C Programming Unit 2 Quiz

What does the if statement in C do?

• Declares variables

• Repeats a block of code

• Evaluates a condition and executes a block if it’s true

• Defines a function

In C, which value is treated as FALSE in conditional expressions?

• 1

• -1

• NULL

• All non-zero values

Which of the following statements is used to jump to a label?

• break

• continue

• switch

• goto

Which of the following is true about the switch statement?

• It can compare float values

• It requires default case

• It uses integral or enumerated types

• It cannot have break statements

What is the purpose of the continue statement?

• Exit the loop immediately

• Skip the current iteration

• Exit the program

• Pause the program

Which loop will definitely execute at least once?

• while

• for

• do...while

• None of the above

If int a = 5; then what will be the output of int b = (a == 5) ? 3 : 2; ?

• 5

• 3

• 2

• Error

Which of the following correctly defines an enum in C?

• enum {1, 2, 3};

• enum colors { RED, GREEN, BLUE };

• enum = { RED, GREEN };

• enum RED, GREEN, BLUE;

Which of the following is the correct syntax of an if statement in C?

• if boolean_expression { statement; }

• if (boolean_expression) { statement; }

• if boolean_expression then statement;

• if { boolean_expression } statement;

In a nested if-else statement, when is the inner if statement executed?

• Always

• When the outer if condition is false

• Only if the outer if condition is true

• Never