Part Two: Final Exam

In Java, which control flow structure would you use to execute a block of code only if a specific condition is true, and execute another block if the condition is false?

• for loop

• if-else statement

• switch statement

• while loop

Consider the following Java method signatures. Which of these demonstrates method overloading? 1. `void display(int a)` 2. `void display(String b)` 3. `int display(int a, int b)` 4. `void display(int a)`

• 1 and 2

• 1, 2, and 3

• 1, 2, and 4

• 1, 2, 3, and 4

Which of the following is a valid reason to use exception handling in Java?

• To improve the performance of the program

• To handle runtime errors and maintain normal application flow

• To make the code more readable

• To avoid using control flow structures

• 16

• 13

• 10

• 11

Which comparison operator would you use in Java to check if two variables, `a` and `b`, are not equal?

• `a =! b`

• `a != b`

• `a <> b`

• `a not b`

In Java, which loop construct would you use to ensure that a block of code is executed at least once, regardless of the condition?

• for loop

• while loop

• do-while loop

• enhanced for loop

How can method overloading improve the design of a Java application?

• By reducing the number of classes needed

• By allowing multiple methods with the same name but different parameters, improving code readability and reusability

• By making the code run faster

• By eliminating the need for exception handling

Which of the following is a strategic approach to handle exceptions in Java?

• Ignoring exceptions to simplify code

• Using try-catch blocks to handle exceptions and ensure program stability

• Using only checked exceptions

• Avoiding the use of exceptions altogether

• 12

• 14

• 10

• 16

Which of the following statements about the `switch` control flow structure in Java is true?

• It can only be used with integer values

• It allows for multiple case labels to execute the same block of code

• It cannot have a default case

• It is more efficient than if-else for all scenarios