programming sequence, selection and iteration

Question 1

What is the definition of Sequence in C# programming?

Answer 1

Instructions are performed in the order they are listed.

The sequence can contain any number of lines, and none can be left out.

Question 2

What is the output of the following code:
int num1 = 10;
int num2 = 5;
int answer1 = num1 + num2;

Answer 2

15

The variable answer1 stores the sum of num1 and num2.

Question 3

What is the output of the following code:
if (num1 > num2)
{
Console.WriteLine(“A”);
}
else if (num1 < num2)
{
Console.WriteLine(“B”);
}
else
{
Console.WriteLine(“C”);
}

Answer 3

Depends on values of num1 and num2:
* A for num1 > num2
* B for num1 < num2
* C for num1 == num2

The program tests conditions to determine which output to display.

Question 4

Fill in the blank: A program makes a decision during the _______ process.

Answer 4

Selection

Selection involves testing conditions and executing code based on the results.

Question 5

What is the purpose of an if statement?

Answer 5

To execute code if a specified condition is true.

It allows branching in the code based on logical conditions.

Question 6

What does a While Loop do in C#?

Answer 6

Repeats a section of code while a condition is true.

It is a type of iteration structure.

Question 7

Complete the code:
Console. (“What age are you?”);
age = .ToInt16( Console.ReadLine() );

Answer 7

WriteLine, Convert

These are necessary to prompt user input and convert it to an integer.

Question 8

What is the output of the code if num1 = 4 and num2 = 6?

Answer 8

Num1 is smaller

The condition num1 < num2 evaluates to true.

Question 9

What is the structure of an if statement with an else?

Answer 9

IF (this thing is true)
Do this
Otherwise
Do this code

This structure allows for alternative code execution based on a condition.

Question 10

What does the For Loop do?

Answer 10

Repeats a section of code a set number of times.

It is a type of count-controlled loop.

Question 11

Fill in the blank: An iteration allows a program to repeat a section of code either for a set number of times or while a _______ is true.

Answer 11

condition

This highlights the flexibility of iteration in programming.

Question 12

True or False: The sequence of instructions in a program can leave out lines.

Answer 12

False

All lines must be included in the sequence.

Question 13

What is the output when age >= 65 if people 65 or older get free fare

Answer 13

Free Fare

This output is part of a conditional statement assessing age.

Question 14

What happens in an if with an else if and an else structure?

Answer 14

It allows multiple conditions to be tested in sequence.

Only the first true condition will execute its corresponding code block.

Question 15

What is the result of the operation: int answer5 = (num1 - num2) * num2; if num1 = 10 and num2 = 5?

Answer 15

25

The calculation follows standard order of operations.