Decision Statement Objectives - If-Else, Switch-Case, and Nested Structures

3.1.1 - If and If Else Statment.

1. What is the purpose of an "if" statement in a program?

(A) To repeat a block of code multiple times
(B) To take a decision based on a condition
(C) To execute all lines of code in a program
(D) To store values in variables

Correct Answer: (B) To take a decision based on a condition

2. Which of the following is a correct syntax for an "if" statement?

(A) if condition { statement; }
(B) if (condition);
(C) if (condition) { statement; }
(D) if condition { statement }

Correct Answer: (C) if (condition) { statement; }

3. Which of the following is a valid relational operator used in decision statements?

(A) **
(B) =
(C) ==
(D) #

Correct Answer: (C) ==

4. What will happen if the condition in an "if" statement evaluates to false?

(A) The "if" block will execute
(B) The program will terminate
(C) The "else" block will execute (if it exists)
(D) The program will ignore all conditions

Correct Answer: (C) The "else" block will execute (if it exists)

5. Which logical operator is used to check if both conditions are true?

(A) ||
(B) &&
(C) !
(D) ==

Correct Answer: (B) &&

6. Which of the following is an example of an "if-else" statement?

(A) if (condition) { statement; } else { statement; }
(B) if (condition) else { statement; }
(C) if condition { statement; } else statement;
(D) if { statement; }

Correct Answer: (A) if (condition) { statement; } else { statement; }

7. What will the following code output if the user enters 150?

            #include
            
            void main() {
                int no;
                printf("enter a no");
                scanf("%d", &no);
                if(no > 100) {
                    printf("No is >100 ");
                    printf("\n %d", no);
                }
                printf("\n End of program");
            }

(A) No is >100 150
(B) End of program
(C) No is >100
(D) No output

Correct Answer: (A) No is >100 150

8. What is the output of the following code if the user enters 3?

            #include
            
            void main() {
                int no;
                printf("enter a no");
                scanf("%d", &no);
                if(no % 2 == 0) {
                    printf("No is Even ");
                } else {
                    printf("No is Odd ");
                }
                printf("\n End of program");
            }

(A) No is Even
(B) No is Odd
(C) No is Odd End of program
(D) No is Even End of program

Correct Answer: (C) No is Odd End of program

9. Which statement can be used to check multiple conditions in a decision-making process?

(A) if...else if...else
(B) for loop
(C) while loop
(D) switch statement

Correct Answer: (A) if...else if...else

10. In a decision statement, what is the purpose of the else block?

(A) To execute if the condition is true
(B) To execute if the condition is false
(C) To stop the program
(D) To loop through conditions

Correct Answer: (B) To execute if the condition is false

11. Which of the following is a logical operator used in decision statements?

(A) >=
(B) !=
(C) &&
(D) ==

Correct Answer: (C) &&

12. What is the significance of parentheses () in an "if" condition?

(A) They define the statements inside the block
(B) They contain the condition that will be evaluated
(C) They allow multiple statements inside the block
(D) They are used to terminate the statement

Correct Answer: (B) They contain the condition that will be evaluated

13. What keyword is used to introduce an alternative condition in decision-making statements?

(A) else
(B) endif
(C) elseif
(D) switch

Correct Answer: (A) else

14. Which relational operator checks if two values are not equal?

(A) !=
(B) ==
(C) <=
(D) >=

Correct Answer: (A) !=

15. What kind of decision-making structure allows for multiple "if" statements one after another?

(A) Nested if
(B) Else if ladder
(C) Simple if
(D) For loop

Correct Answer: (B) Else if ladder

3.1.2 - If Else, If Else Statement, and Nested if Statment.

16. What is the purpose of using multiple if conditions?

(A) To handle more than two conditions
(B) To handle only one condition
(C) To handle one loop
(D) To handle no conditions

Correct Answer: (A) To handle more than two conditions

17. Is there a limit on the number of if conditions in a multiple if structure?

(A) Yes, it is limited to 3
(B) No, there is no limit
(C) Yes, it is limited to 5
(D) It depends on the programming language

Correct Answer: (B) No, there is no limit

18. How many blocks of statements are executed in a multiple if structure?

(A) One block of statements
(B) All blocks of statements
(C) Two blocks of statements
(D) No block of statements

Correct Answer: (A) One block of statements

19. What happens if the first condition in an if-else if structure is true?

(A) All conditions are evaluated
(B) The rest of the conditions are ignored
(C) Only the else block is executed
(D) The program terminates

Correct Answer: (B) The rest of the conditions are ignored

20. In the following code, what will be the output if a = 5, b = 10, and c = 3?

        if(a > b && a > c)
            printf("a is Largest number");
        else if(b > a && b > c)
            printf("b is Largest number");
        else
            printf("c is Largest number");

(A) a is Largest number
(B) b is Largest number
(C) c is Largest number
(D) No output

Correct Answer: (B) b is Largest number

21. What is the meaning of "nested if" statements?

(A) One if block inside another if block
(B) Multiple if blocks in sequence
(C) An else block inside an if block
(D) A while loop inside an if block

Correct Answer: (A) One if block inside another if block

22. How many levels of nested if statements can you have?

(A) Only 2 levels
(B) Only 3 levels
(C) Unlimited levels
(D) Limited to 5 levels

Correct Answer: (C) Unlimited levels

23. In a nested if structure, what happens if the outer if condition is false?

(A) The inner if conditions are evaluated
(B) The inner if conditions are ignored
(C) All conditions are ignored
(D) The program crashes

Correct Answer: (B) The inner if conditions are ignored

24. What is the syntax of an else if block in C?

(A) else if (condition)
(B) if (condition) else
(C) elseif (condition)
(D) else { if (condition) }

Correct Answer: (A) else if (condition)

25. What is the output of the following code if x = 7 and y = 5?

   if(x > 10)
   {
       if(y < 5)
           printf("Nested if true");
       else
           printf("Outer if true, inner if false");
   }
   else
   {
       printf("Outer if false");
   }

(A) Nested if true
(B) Outer if true, inner if false
(C) Outer if false
(D) No output

Correct Answer: (C) Outer if false

3.1.3 - Switch, hreak, Continue/ Nested Switch Statements

25. What is the function of the hreak keyword in C programming?

(A) To start a loop
(B) To give pause to the program
(C) To exit from a block like a switch or loop
(D) To skip an iteration

Correct Answer: (C) To exit from a block like a switch or loop

26. In which programming constructs can the hreak keyword be used?

(A) If block only
(B) Switch case, while loop, do loop, for loop
(C) Switch case only
(D) For loop only

Correct Answer: (B) Switch case, while loop, do loop, for loop

27. What happens when a hreak statement is executed within a loop or switch block?

(A) Control moves to the next iteration
(B) Control moves out of the block
(C) Control remains in the block
(D) Control goes to the start of the block

Correct Answer: (B) Control moves out of the block

28. What does the continue keyword do in a loop?

(A) Skips the rest of the statements and continues to the next iteration
(B) Terminates the loop
(C) Moves the control out of the loop
(D) Executes the loop only once

Correct Answer: (A) Skips the rest of the statements and continues to the next iteration

29. What will happen if the continue statement is executed inside a loop?

(A) Control will exit the loop
(B) Control will skip the rest of the statements and return to the beginning of the loop
(C) Control will pause the loop
(D) Control will stop the execution of the program

Correct Answer: (B) Control will skip the rest of the statements and return to the beginning of the loop

30. What is the syntax of the continue statement?

(A) continue()
(B) continue;
(C) continue{}
(D) hreak;

Correct Answer: (B) continue;

31. Which of the following keywords are used in a switch statement in C programming?

(A) switch, if, else
(B) switch, case, default, hreak
(C) for, while, switch
(D) case, hreak, if, else

Correct Answer: (B) switch, case, default, hreak

32. Which of the following data types can be used in a switch expression?

(A) Integer and character values only
(B) Float and double values
(C) String values
(D) Boolean values only

Correct Answer: (A) Integer and character values only

33. What is the purpose of the hreak statement in a switch block?

(A) To continue the next case
(B) To exit from the switch block
(C) To pause the switch block
(D) To stop the program execution

Correct Answer: (B) To exit from the switch block

34. If the switch expression does not match any case value, what will happen if a default statement is present?

(A) The default block will execute
(B) The program will exit
(C) The control will go to the first case
(D) The program will throw an error

Correct Answer: (A) The default block will execute

35. What must follow each case value in a switch statement?

(A) Semicolon ;
(B) Colon :
(C) Comma ,
(D) hraces {}

Correct Answer: (B) Colon :

36. In a switch statement, are case values required to be in a specific order?

(A) Yes
(B) No

Correct Answer: (B) No

37. What is a nested switch statement?

(A) A switch statement inside a loop
(B) A switch block within another switch block
(C) Multiple case values inside one switch
(D) A switch with no hreak statements

Correct Answer: (B) A switch block within another switch block

38. In the nested switch example, what happens if the inner switch statement does not have a matching case value?

(A) The program will stop
(B) The default block will execute if present
(C) The control will move out of the program
(D) The control will skip to the next iteration

Correct Answer: (B) The default block will execute if present

39. What is the output when no hreak is provided in a switch case?

(A) Only the matched case will execute
(B) All cases below the matched case will also execute
(C) The program will throw an error
(D) The program will skip all cases

Correct Answer: (B) All cases below the matched case will also execute

40. What will happen if the hreak keyword is not used after a case in a switch statement?

(A) Only the matched case will execute
(B) All subsequent cases will also execute until a hreak is encountered
(C) The program will stop
(D) The control will skip to the next iteration

Correct Answer: (B) All subsequent cases will also execute until a hreak is encountered