Midterm

Question 1

What is object-oriented programming?

Answer 1

A programming methodology where programmers create software objects that model things.

Question 2

Why do people like OOP?

Answer 2

It enhances programmer productivity and reduces software costs.

Question 3

Machine vs assembley vs high level languages.

Answer 3

Machine language is directly understood by computers.
Assembly language uses English like abbreviations to represent elementary operations.
High-level languages are translated to machine language using compiler programs.

Question 4

What are objects and methods used for?

Answer 4

Objects are reusable software components and methods are used to perform a task in a program.

Question 5

How are objects created?

Answer 5

Objects are created with attributes and behaviors.

Question 6

What are the characteristics of the C# language?

Answer 6

C# is event-driven and a visual programmin glanguage that allows for multiple tasks to be performed at the same time.

Question 7

What is the Common Language Runtime (CLR) and platorm independence?

Answer 7

CLR provides functionality that makes .NET programs easier to develop and debug.

Question 8

What is an IDE used for?

Answer 8

An IDE (integrated development environment) provides programmers with tools to aid in software development and allows you to write, run, test, and debug C# programs quickly.

Question 9

What are namespaces and code blocks?

Answer 9

Namespaces are named collections of classes.

Code blocks are defined by curly brackets ({ }).

Question 10

C# comments

Answer 10

’//’ comments out a single-line

‘/…/’ comments out multiple lines.

Question 11

Naming Conventions

Answer 11

Cannot use keywords, pick a name that is descriptive, but not too long, class names should have each new word capitalized, identifiers should use camelBack casing.

Question 12

How do you write to the console?

Answer 12

Conosle.WriteLine( ) or Console.Write( )

Question 13

What is a variable and how do you declare one?

Answer 13

A memory location where a value can be stored for use later in an app.
Declared with a name and type.

Question 14

Characteristics of C# integers and types.

Answer 14

32 bit integer value

Question 15

Integer Math

Answer 15

Follows order of operations (PEMDAS)

Question 16

What are the main categories of structured programming?

Answer 16

Sequence statements, repetition statements, selection statements.

Question 17

Conditions

Answer 17

An expression that can be classified as true or false.

Question 18

Three types of selection statements.

Answer 18

if statement
if else statement
else if statement

Question 19

C# Error Types

Answer 19

Dangling-else: which if is the else associated with?
Logic Errors: only effect resulting output
Syntax Errors

Question 20

The four types of repetition statements

Answer 20

While loop
do while loop
for loop
infinite loop

Question 21

Control/Counter variables

Answer 21

Control: typing in something that matches with the control variable to end the loop

Counter: adding a value to a variable till it matches the number you want to reach

Question 22

Assignment Operator

Answer 22

A variable is definitely assigned when its guaranteed to be assigned a value before being used.

Question 23

Sentinel vs counter controlled repetitions

Answer 23

Sentinel: values that signify the end of data entry
Counter: counts till it reaches a number to end the loop

Question 24

Variable Scope

Answer 24

Defines where the variable can be use in an application

Question 25

Break vs Continue

Answer 25

Break: causes an immediate exit from the statement
Continue: skips the remaining statements in the loop body and proceeds with the next iteration

Question 26

Characteristics of C# arrays

Answer 26

Fixed-length
Elements must all be the same type
Indexing starts at 0
c.Length gets the length of array c

Question 27

Array-access and creation expressions

Answer 27

Need to specify a type and length

Question 28

C# Constants

Answer 28

const declares a constant
Muse be initialized when declared and cannot be modified
Should be written in capital letters

Question 29

Jagged Arrays

Answer 29

Maintained as a 1D array referring to another 1D array’s elements
More flexible than other arrays
Length of the arrays DO NOT need to be the same
Each 1D array needs to be initialized separately

Question 30

Rectangular Arrays

Answer 30

Each row has the same number of rows and columns

Can be accessed with arrayName[row,column]