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UBC CPEN 223 - FINAL exam with correct answers
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  • UBC CPEN 223 - F

3 C's for "good Software" correct answers- Correct (safe from bugs) - Comprehensible (easy to understand) - Changeable (ready to change) Static Checking correct answersThe checking that is done at compilation. - Bug automatically found before program runs Dynamic Checking correct answersTh...

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  • August 28, 2024
  • 32
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers

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  • ubc cpen 223 final

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  • UBC CPEN 223 - F
  • UBC CPEN 223 - F

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UBC CPEN 223 - FINAL

3 C's for "good Software" correct answers- Correct (safe from bugs)

- Comprehensible (easy to understand)

- Changeable (ready to change)



Static Checking correct answersThe checking that is done at compilation.

- Bug automatically found before program runs



Dynamic Checking correct answersThe checking that is done at run time.

- Found automatically



Benefits of C# correct answers-Safety

> Type safe, static checking, exception handling, etc

- Ubiquity

> Multiplatform: Mobile, Web, Windows/Mac/Linux

- Elegance

- Popular

- Powerful

- High-level

- Modern object oriented



Issues with C# correct answers- Verbose: takes a lot of code to do simple task

- Large: many features



static void Main() correct answersThe starting place of a program

,int varName = 92; correct answersDeclaring an int type variable



double VarName = 1.45; correct answersDeclaring a double type variable



char varName = '*'; correct answersDeclaring a char type variable



Two categories of C# types correct answers- Value types

- Reference types



C# operators correct answers- arithmetic ( +, -, /, % (remainder), *)

- comparison (==, !=, >, >=, ...)

- conditional (&&, ||, !)



C# selection statements correct answers- if(condition)

- else if(condition)

- switch *an alternative to if-else statements



C# repetition statements correct answers- while

- for

- do-while



Class correct answersThe most important user defined type

- Contains two types of members;

> Data members (fields, ..) that store the data within the ______.

> Function members (methods, constructors, ...) that perform operations on the data



Methods correct answersA block of code that contains a series of statements.



Arrays correct answersstores a fixed-size collection of elements

,How to initialize an array correct answersint[] nameOfVariable = new int[5];

- The size of the ______ is 5.

int [] nameOfVariable = new int[] {1, 2, 3, 4, 5};

int [] nameOfVariable = {1, 2, 3, 4, 5};



What is a Data Type? correct answersA _____ is a set of values and the operations that are permitted on
the values



Value pre-defined types correct answers- int

- long

- double

- char

- uint

- bool

- decimal

- bool

- byte

- sbyte

- float

- uint

- short

- ushort



Reference pre-defined types correct answers- object

- string

- dynamic

, A value type correct answersThis type needs only one allocated memory space that stores the actual
data.



A reference type correct answersThis type stores the *mention to some other memory location where
the actual data is stored.



Two regions of memory that store data correct answers- stack

- heap



Stack correct answerslocation for storage of value types

(last-in, first-out data structure)

- Primary operations:

> push() : addition of an element to the top of the stack

> pop() : removal of an element from the top of the stack

> Clear()

> Remove()

> ToArray()

> Contains()

> Count()



Heap correct answersThe reference type is stored in the stack but the actual data is stored in the
"______"



User-defined types correct answers- class

- struct

- array

NOTE: can be classified as either reference or value types



_______ is a type that stores logically related data and functions correct answersa class

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