Intro To Programming

Question 1

What are the steps in the 5-Step Process?

Answer 1

Identify, Analyze, Develop, Implement, and Evaluate.

Question 2

Before a code can run, it must be..? It is reduced to…?

Answer 2

Compiled.

0s and 1s.

Question 3

The character variable is written as…? And how many characters can it hold? What kind of quotes are around it?

Answer 3

char.
Can only hold one character.
Single quotes.

Question 4

String variables have what kind of quotes around it?

Answer 4

Double quotes.

Question 5

What are escape characters?

Answer 5

They tell C# to treat the next character as part of the string.

Question 6

What kinds of numeric data are there? How many places can it hold?

Answer 6

Int and float and double.
int - whole numbers.
float - 7 places.
double - 15 places.

Question 7

What are variables?

Answer 7

They are the storage containers of the programming world.

Question 8

What kind of notation is used with variables?

Answer 8

camelCase.

Question 9

Which words cannot be used in a variable?

Answer 9

with, for, if or break.

as well as any numbers or special characters.

Question 10

In
string courseName = "ITP";
what kind of variable is this?
what is the variable name?
what is the assignment operator?
the value...?

Answer 10

It is a string variable.
The variable name is courseName.
The “=” sign is the assignment operator.
“ITP” is the value.

Question 11

What is an operator?

Answer 11

They are used to perform mathematical logical operations.

Question 12

What is a modulo? What sign does it use?

Answer 12

It finds the remainder after the division of one # by another. It uses the % sign.

Question 13

What does an increment look like? Decrement?

Answer 13

++ and –.

Question 14

Do function and method mean the same thing?

Answer 14

Yes, but what we call them depends on the language and location. If it’s declared outside an object, it’s a method.

Question 15

In

private static void Print (string value)
{
Console.WriteLine(value);
}

Where is the access modifier?
Where is the "other" modifier?
Where is the return type?
Where is the Identifier?
Where is the parameters?

Answer 15

The access modifier is private.
The "other" modifier is static.
The return type is void.
The Identifier is Print.
The parameters is (string value).

Question 16

What is a method?

Answer 16

A block of statements under the signature.

Question 17

What kind of values can the return value be?

Answer 17

It can be a literal, variable, constant, expression, or statement result.

Question 18

What are some of the common errors in writing a code?

Answer 18

• declaring a method inside another’s body.
• mismatching/miscounting ( ) and { }.
• placing a semicolon at the end of the signature or body.
• mismatching/miscounting argument/parameter type/ order.

Question 19

How do write a boolean variable and what is it?

Answer 19

bool.

and it holds a True or False value.

Question 20

How do write equality and inequality?

Answer 20

== and !=

Question 21

What is the difference between equality and assignment?

Answer 21

== means that it’s comparing two values.

= means that you are storing a value.

Question 22

In an If statement, how does it run?

Answer 22

The contents of the parenthesis will be evaluated to a boolean value, either true or false.
If the condition is true, then the statement block runs, otherwise, it is ignored.

Question 23

How do else statements run?

Answer 23

In a simple if, else conditional block, if the first condition is false, then the second block of code will be executed.

Question 24

Can you use multiple else statements?

Answer 24

Yes, you can.

Question 25

What is a nested conditional statement?

Answer 25

It is when one decision is dependent on another.

Question 26

What are the two conditional logical operators?

Answer 26

&& and ||.

Question 27

What are the three types of code in loops?

Answer 27

Sequential, Conditional, and Repetitive.

Question 28

What is the difference between a while loop and a for loop?

Answer 28

The while loop checks to see if a condition is true or false. The code block runs until the condition is false.

A for loop customizes the initialization.

Question 29

What is an array?

Answer 29

A straightforward way of storing a bunch of items together. Often used to store the same type.

Question 30

What are the steps of setting an array?

Answer 30

• The variable’s default is null.
• Memory for the array is allocated.
• Then, the elements are initialized to the type’s default or the provided value.
• The variable’s value now refers to that memory, which means it is no longer null.

Question 31

What do the [ ] do?

Answer 31

It moves you to the next/previous element in sequence.

Question 32

What happens if member access is attempted when the variable referencing is null?

Answer 32

A NullReferenceException is thrown.

Question 33

What happens if element access is attempted beyond the bounds of the array? (either too high or too low)

Answer 33

An IndexOutOfRangeException is thrown.

Question 34

What is declaration without initialization?

Answer 34

When we don’t yet know the size or values but need the variable.

Question 35

What is initialization of an existing variable?`

Answer 35

When we know the size, but not the values. This will allocate the memory and initialize to the type’s defaults.

But it is also when we know the size as well as the values , this will allocate the memory and initialize using the initializer list we provide.

Question 36

How do we update elements in an array?

Answer 36

• numbers [0] = 9;

- words [0] = “see”;

Question 37

How to we read elements in an array?

Answer 37

Console.WriteLine(numbers[0]);
int i = numbers[1];
i += numbers [2]’

OR

Console.WriteLine($”C# is pronounced: "{words[0]} {words[1]}");

Question 38

What are some of the common errors when writing arrays?

Answer 38

• forgetting [ ] or { } or new
• mismatching [#] and {#} counts
• confusing length (total items) and array elements access (0-based), leads to off by one errors