Lecture 3.5

Question 1

What is the primary purpose of a conditional statement in coding?
a) To perform repetitive tasks
b) To code for cases that depend on certain conditions
c) To define variables
d) To create loops

Answer 1

b

Question 2

Conditional statements are used to decide whether to perform a task based on:

a) The length of the code
b) The type of programming language
c) The conditions specified
d) The number of lines in the program

Answer 2

c

Question 3

In which of the following scenarios would you use a conditional statement?

a) When you need to execute a block of code only if a specific condition is met
b) When you want to initialize a variable
c) When you are importing libraries
d) When you are defining a function

Answer 3

a

Question 4

Which of the following is a common structure of a conditional statement?

a) for loop
b) while loop
c) if-else statement
d) switch-case statement

Answer 4

c

Question 5

True or False: Conditional statements are only used to handle situations where tasks are always performed, regardless of conditions.

a) True
b) False

Answer 5

b

Question 6

What is the purpose of the if statement in Java?

Answer 6

To execute code based on whether a condition is true

Question 7

How do you write a basic if statement in Java?

Answer 7

if (condition) { code }

Question 8

Which of the following is a correct use of an if statement in Java?
if (x > 10) System.out.println(“x is greater than 10”);
b) if x > 10 { System.out.println(“x is greater than 10”); }
c) if (x > 10) { System.out.println(“x is greater than 10”); }
d) if (x > 10) { System.out.println(“x is greater than 10”);

Answer 8

if (x > 10) { System.out.println(“x is greater than 10”); }

Question 9

What happens if the condition in an if statement evaluates to false?

Answer 9

The if statement will be skipped and no code will execute

Question 10

In a flowchart, if the condition in the diamond shape evaluates to true, where does the arrow point?

Answer 10

To a process or task

Question 11

True or False: The if statement in Java can only be used with boolean conditions.

Answer 11

True

Question 12

In a flowchart, what shape is typically used to represent a condition or decision?

Answer 12

Diamond

Question 13

What do the arrows leading out of the diamond shape in a flowchart represent?

Answer 13

Possible outcomes based on the condition

Question 14

In a flowchart, if the condition in the diamond shape evaluates to true, where does the arrow point?

Answer 14

To a process or task

Question 15

What is the purpose of using diamonds in a flowchart?

Answer 15

To represent decision points that direct the flow based on conditions

Question 16

True or False: A flowchart’s diamond shape can have multiple arrows leading out, but they are only used to show the start and end of the flowchart.

Answer 16

False (Diamonds have multiple arrows leading out to represent different outcomes based on the condition, not just start and end points.)

Question 17

In a flowchart, if a condition in the diamond shape evaluates to true, what is the next step?

Answer 17

Follow the true arrow to the next rectangle (task)

Question 18

What does the rectangle in a flowchart typically represent?

Answer 18

A process or task

Question 19

If a condition in a flowchart evaluates to false, what typically happens next?

Answer 19

The false arrow directs the flow to an alternative task or path

Question 20

Why might a flowchart have both true and false arrows coming out of a diamond shape?

Answer 20

To show the flow based on whether the condition is met or not

Question 21

True or False: In a flowchart, if a condition is evaluated as true, the tasks associated with the false path will be skipped.

Answer 21

True

Question 22

After handling both the true and false branches in a flowchart, what should be done next?

Answer 22

Merge the true and false branches back into a single path

Question 23

What common mistake should be avoided when dealing with branches in a flowchart?

Answer 23

Leaving a branch without a successor

Question 24

In a flowchart, what does merging the true and false branches into one arrow signify?

Answer 24

That both branches lead to the same next step or task

Question 25

Why is it important to merge branches back together in a flowchart?

Answer 25

To ensure that all paths eventually lead to a unified process

Question 26

What type of value must the condition inside an if statement evaluate to?

Answer 26

A boolean (true or false)

Question 27

What are logical expressions used for in programming?

Answer 27

To determine the Boolean result of conditions

Question 28

Which of the following is a common comparison operator in programming?

Answer 28

!=

Question 29

What does the comparison operator != check for?

Answer 29

Not equal to

Question 30

Which logical operator is used to combine two conditions, where both must be true for the overall expression to be true?

Answer 30

&& (AND)

Question 31

True or False: The comparison operator >= checks if a value is greater than or equal to another value.

Answer 31

True

Question 32

What happens if the condition inside the parentheses of an if statement evaluates to true?

Answer 32

The statements inside the if block are executed

Question 33

If the condition in an if statement evaluates to false, what is the result?

Answer 33

he statements inside the if block are skipped

Question 34

How can you ensure that multiple statements are executed within an if block?

Answer 34

Use curly braces {} to group the statements together

Question 35

What is the role of curly braces {} in an if statement when multiple statements need to be executed?

Answer 35

They define the start and end of the if block for grouping statements

Question 36

True or False: In Java, if the condition in an if statement is false, none of the statements inside the if block will be executed.

Answer 36

True

Question 37

What is the purpose of using curly braces {} in an if statement in Java?

Answer 37

To group multiple statements together that should be executed if the condition is true

Question 38

How should you format multiple statements within an if block in Java?

Answer 38

Use curly braces to group the statements and place each statement on a new line

Question 39

What does the closing brace } signify in an if statement?

Answer 39

The end of the entire if statement block

Question 40

True or False: In Java, if you have only one statement to execute after an if condition, you can omit the curly braces {}

Answer 40

True

Question 41

What is the purpose of the else clause in an if statement?

Answer 41

To handle alternative tasks when the if condition evaluates to false

Question 42

What is the correct syntax to use an else clause following an if statement in Java?

Answer 42

if (condition) { statements } else { alternative statements }

Question 43

True or False: In Java, it is necessary to use curly braces {} around the statements inside an else block if there are multiple statements to execute.

Answer 43

True