Copiar y Editar

oop

Descripción

Test sobre oop, creado por Hello World el 20/01/2017.
Hello World
Test por Hello World, actualizado hace más de 1 año
Hello World
Creado por Hello World hace casi 8 años
401
5
0

Resumen del Recurso

Pregunta 1

Pregunta
1. C-style languages are
Respuesta
  • a) C, C#
  • b) C, C++
  • c) C, C#, C++
  • d) C, C#, C++, Java
  • e) C#, C++

Pregunta 2

Pregunta
2. Choose the incorrect statement for C style languages.
Respuesta
  • a) semicolons are not used to denote the end of a statement
  • b) curly brackets are used to group statements
  • c) variables are assigned using an equals sign, but compared using two consecutive equals sign
  • d) square brackets are used with arrays
  • e) a, b, c, d

Pregunta 3

Pregunta
3. Which aspects does variable have?
Respuesta
  • a) type, size and memory address
  • b) memory address, type and value
  • c) type and value
  • d) value, size and memory address

Pregunta 4

Pregunta
4. What declaration of variables is the correct?
Respuesta
  • a) char c;i;
  • b) int b;c;
  • c) char c, char s;
  • d) double a, b;

Pregunta 5

Pregunta
5. Declaration of variable is not a statement of C# language, but ends with semicolon.
Respuesta
  • True
  • False

Pregunta 6

Pregunta
6. Declaration of variable is a statement of C# language.
Respuesta
  • True
  • False

Pregunta 7

Pregunta
7. Which rule is correct when naming variables?
Respuesta
  • a) the first character must be letters, underscore only
  • b) an identifier can consist of letters, number and reserved words
  • c) reserved words can be used as variable names
  • d) the first character must be only letter

Pregunta 8

Pregunta
8. C# is case sensitive language.
Respuesta
  • a) yes
  • b) no
  • c) it depends on data type

Pregunta 9

Pregunta
9. Choose the correct statement with initializing.
Respuesta
  • a) string c="0";
  • b) int i="0";
  • c) char c="0";
  • d) int i='0';

Pregunta 10

Pregunta
10. What method in C# is Console output?
Respuesta
  • a) ReadLine
  • b) WriteLine

Pregunta 11

Pregunta
11. What method in C# is Console input?
Respuesta
  • a) ReadLine
  • b) WriteLine

Pregunta 12

Pregunta
12. The result in Console application of this code will be? int a=8, b=2, c=0; c=a+b; Console.WriteLine(“{0}+{1}={2}”,b,a,c);
Respuesta
  • a) 2+8=10
  • b) 8+2=10
  • c) 10=2+8
  • d) 10=8+2

Pregunta 13

Pregunta
13. Choose the incorrect assignment? int i,j;
Respuesta
  • a) i=j=1;
  • b) i=10,j=10;
  • c) i=(j=10);
  • d) a, b, c

Pregunta 14

Pregunta
14. What will be the result? int i=5; int j=1; int x=(j--)+(--i);
Respuesta
  • a) x=6;
  • b) x=5;
  • c) x=7;
  • d) x=8;

Pregunta 15

Pregunta
15. What will be the result? int x=10,i=0,j=2; x+=(i-j);
Respuesta
  • a) 14
  • b) 10
  • c) 12
  • d) 8

Pregunta 16

Pregunta
16. The “for” statement can be an infinite loop.
Respuesta
  • True
  • False

Pregunta 17

Pregunta
17. Choose the incorrect For statement?
Respuesta
  • a) for(;;){}
  • b) for( int x = 0, x<= 100; x++){}
  • c) int x = 0; for(; x<= 100; x++){}
  • d) a,b,c

Pregunta 18

Pregunta
18. The statements bodies of the “for” and “while” operators might never be executed.
Respuesta
  • True
  • False

Pregunta 19

Pregunta
19. The statements bodies of the “for” and “while” operators must be executed at least once.
Respuesta
  • True
  • False

Pregunta 20

Pregunta
20. The statements bodies of the “for” and “foreach” operators might never be executed.
Respuesta
  • True
  • False

Pregunta 21

Pregunta
21. The statements bodies of the “for” and “foreach” operators must be executed at least once.
Respuesta
  • True
  • False

Pregunta 22

Pregunta
22. In what statement the Statements body is always executed at least once?
Respuesta
  • a) for, do while, while
  • b) do while
  • c) foreach, while
  • d) do while, for

Pregunta 23

Pregunta
23. C# classes contain:
Respuesta
  • a) properties and functions
  • b) data members(field, variables), properties and methods
  • c) method, functions and constructors
  • d) variables and methods

Pregunta 24

Pregunta
24. The properties in C# classes are…
Respuesta
  • a) procedures and functions
  • b) constructors
  • c) data members(variables)
  • d) members with get and set

Pregunta 25

Pregunta
25. C# procedure specifies with …
Respuesta
  • a) this keyword
  • b) void keyword
  • c) return data type
  • d) static keyword

Pregunta 26

Pregunta
26. An object is …
Respuesta
  • a) a property of the class
  • b) an instance of the class
  • c) a method of the class
  • d) a data member of the class

Pregunta 27

Pregunta
27. The classes are like new data types.
Respuesta
  • True
  • False

Pregunta 28

Pregunta
28. Access modifiers are ...
Respuesta
  • a) void and return data types
  • b) public and private
  • c) data types
  • d) this and static keywords

Pregunta 29

Pregunta
29. A public method with the same name as the class with no return type is ...
Respuesta
  • a) constructor
  • b) function
  • c) procedure
  • d) property

Pregunta 30

Pregunta
30. Procedures and constructors can’t be passed any arguments.
Respuesta
  • True
  • False

Pregunta 31

Pregunta
31. Functions can’t be passed any arguments.
Respuesta
  • True
  • False

Pregunta 32

Pregunta
32. Functions can be passed any arguments.
Respuesta
  • True
  • False

Pregunta 33

Pregunta
33. Procedures can’t be passed any arguments.
Respuesta
  • True
  • False

Pregunta 34

Pregunta
34. Procedures can be passed any arguments.
Respuesta
  • True
  • False

Pregunta 35

Pregunta
35. Methods can be passed any arguments.
Respuesta
  • True
  • False

Pregunta 36

Pregunta
36. Methods can’t be passed any arguments.
Respuesta
  • True
  • False

Pregunta 37

Pregunta
37. The default constructor is a method with …
Respuesta
  • a) any arguments
  • b) no arguments

Pregunta 38

Pregunta
38. In the static method must be absent “this” reference, as such method doesn’t work with any object.
Respuesta
  • True
  • False

Pregunta 39

Pregunta
39. In the static method allowed immediate call only other instance methods.
Respuesta
  • True
  • False

Pregunta 40

Pregunta
40. The “this” keyword can be used for...
Respuesta
  • a) methods
  • b) functions and procedures
  • c) constructors
  • d) a, b, c

Pregunta 41

Pregunta
41. Choose the correct declaration of array.
Respuesta
  • a) int[] a = int[10];
  • b) int[] c = new int[10];
  • c) int[] a = new [10];
  • d) a, b, c

Pregunta 42

Pregunta
42. Choose the correct declaration of jugged array.
Respuesta
  • a) int [][] j = new int[];
  • b) int [][] j = new int[][5];
  • c) int [][] j = int [5][5];
  • d) int [][] j = new int[5][];

Pregunta 43

Pregunta
43. Choose the correct declaration and initialization of array.
Respuesta
  • a) int[] a = new int[5]{1,5,8,4,5};
  • b) int[] a = {1,5,8,4,5};
  • c) a,b
  • d) there is no correct answer

Pregunta 44

Pregunta
44. Choose the correct declaration of two-dimensional array.
Respuesta
  • a) int[][] a = new int [2][5];
  • b) int [] a = new int [2][5];
  • c) int [,] a = new int[2,5];
  • d) int[,] a = new int[2][5];

Pregunta 45

Pregunta
45. The last unit (element) index of array is…
Respuesta
  • a) 0
  • b) 10
  • c) length
  • d) length-1

Pregunta 46

Pregunta
46. How many elements does the next array include? Int[] a=new int[77];
Respuesta
  • a) 76
  • b) 77
  • c) 78

Pregunta 47

Pregunta
47. How many elements does the next array include? Int[] a=new int[100];
Respuesta
  • a) 99
  • b) 100
  • c) 101

Pregunta 48

Pregunta
48. C# function specifies with …
Respuesta
  • a) this keyword
  • b) void keyword
  • c) return data type
  • d) static keyword

Pregunta 49

Pregunta
49. The statements body of the “do while” operator might never be executed.
Respuesta
  • True
  • False

Pregunta 50

Pregunta
50. The statements body of the “do while” operator must be executed at least once.
Respuesta
  • True
  • False

Pregunta 51

Pregunta
51. Choose the correct assignment? int i,j;
Respuesta
  • a) i,j=8;
  • b) i=8,j=8;
  • c) i=(j=8);
  • d) a,b,c;

Pregunta 52

Pregunta
52. Constructors can’t be passed any arguments.
Respuesta
  • True
  • False

Pregunta 53

Pregunta
53. Constructors can be passed any arguments.
Respuesta
  • True
  • False

Pregunta 54

Pregunta
54. Default constructors can’t be passed any arguments.
Respuesta
  • True
  • False

Pregunta 55

Pregunta
55. Default constructors can be passed any arguments.
Respuesta
  • True
  • False

Pregunta 56

Pregunta
56. How many elements does the next array include? int[] a=new int[99];
Respuesta
  • a) 99
  • b) 100
  • c) 101

Pregunta 57

Pregunta
57. Choose the core principles of OOP
Respuesta
  • a) Encapsulation and Inheritance
  • b) Encapsulation, Inheritance and Polymorphism
  • c) encapsulation and polymorphism
  • d) encapsulation, inheritance, polymorphism, aggregation and composition

Pregunta 58

Pregunta
58. Hiding an object’s internal implementation detail is…
Respuesta
  • a) encapsulation
  • b) inheritance
  • c) polymorphism
  • d) composition

Pregunta 59

Pregunta
59. Which concept promotes code reuse?
Respuesta
  • a) encapsulation
  • b) inheritance
  • c) polymorphism
  • d) composition

Pregunta 60

Pregunta
60. Which statement shows Encapsulation concept?
Respuesta
  • a) string s = “Hello World!”;
  • b) int a,b=0;
  • c) b++;
  • d) string s = “hello”, bool i=s.Equals(“!”);

Pregunta 61

Pregunta
61. Closely related to the notion of encapsulating programming logic is the idea of…
Respuesta
  • a) overriding
  • b) data protection
  • c) overloading
  • d) realization

Pregunta 62

Pregunta
62. Which access modificator (s) related to the data protection?
Respuesta
  • a) public
  • b) protected
  • c) private
  • d) private and protected

Pregunta 63

Pregunta
63. Members of a class that represent an object’s state should not be marked as
Respuesta
  • a) public
  • b) private
  • c) protected

Pregunta 64

Pregunta
64. Choose traditional technique to encapsulate class’s data.
Respuesta
  • a) Define default constructor
  • b) Define your own constructor
  • c) Define a pair of public accessor(get) and mutator(set) methods
  • d) Mark the data of class as public

Pregunta 65

Pregunta
65. Choose a technique to encapsulate class’s data
Respuesta
  • a) Define fields of class
  • b) Define your own constructor
  • c) Define a public properties
  • d) Define a private properties

Pregunta 66

Pregunta
66. The “Black boxing programming” term is related to
Respuesta
  • a) inheritance
  • c) objects
  • b) encapsulation
  • d) polymorphism

Pregunta 67

Pregunta
67. A “get” method …
Respuesta
  • a) returns the current value of state data
  • b) returns the default value of state data
  • c) allows to change the current value of state data
  • d) allows to change the methods of class

Pregunta 68

Pregunta
68. A “set” method …
Respuesta
  • a) returns the current value of state data
  • b) returns the default value of state data
  • c) allows to change the current value of state data
  • d) allows to change the methods of class

Pregunta 69

Pregunta
69. Is it possible to perform any internal logic necessary before making the value assignment in properties of class?
Respuesta
  • a) yes
  • b) no

Pregunta 70

Pregunta
70. Which keyword is related to the "get" block of property?
Respuesta
  • a) value
  • b) return
  • c) this
  • d) public

Pregunta 71

Pregunta
71. Which keyword is related to the "set" block of property?
Respuesta
  • a) value
  • b) return
  • c) this
  • d) public

Pregunta 72

Pregunta
72. Inheritance of OOP facilities ...
Respuesta
  • a) data protection
  • b) data hiding
  • c) code reuse

Pregunta 73

Pregunta
73. Classical inheritance is …
Respuesta
  • a) a model of “is-a” relationship
  • b) a model of a “has-a” relationship

Pregunta 74

Pregunta
74. The parent class is
Respuesta
  • a) a child class
  • b) a derived class
  • c) a base class

Pregunta 75

Pregunta
75. The extending classes are formally termed...
Respuesta
  • a) child classes
  • b) parent classes
  • c) base classes

Pregunta 76

Pregunta
76. What role of parent class?
Respuesta
  • a) define all the common data and members for the classes that extend it
  • b) define all the common methods for the classes that extend it
  • c) define all the common data for the classes that extend it
  • d) define all the common properties and functions for the classes that extend it

Pregunta 77

Pregunta
77. A child class inherits the constructor of a parent class.
Respuesta
  • True
  • False

Pregunta 78

Pregunta
78. Which members can never be accessed from parent class?
Respuesta
  • a) public members
  • b) private members
  • c) protected members
  • d) private and protected

Pregunta 79

Pregunta
79. (?)Is it possible to build multiple inheritance for classes in C# language ?
Respuesta
  • a) yes
  • b) no

Pregunta 80

Pregunta
80. Which classes cannot have its child classes?
Respuesta
  • a) public classes
  • b) sealed classes
  • c) private classes
  • d) derived classes

Pregunta 81

Pregunta
81. Which members of parent class cannot be accessed to other classes, but can be accessed to its child classes?
Respuesta
  • a) all members
  • b) public members
  • c) private members
  • d) protected members

Pregunta 82

Pregunta
82. Another use of the "this" keyword is to design a class using a technique termed…
Respuesta
  • a) constructor definition
  • b) constructor creation
  • c) constructor chaining
  • d) constructor using

Pregunta 83

Pregunta
83. The "base" keyword refers to …
Respuesta
  • a) the parent class
  • b) the child class
  • c) derived class

Pregunta 84

Pregunta
84. The process termed "method overriding" is …
Respuesta
  • a) a way for base classes to define as own version of a method defined by its parent class
  • b) a way for child classes to define its own version of a method defined by its derived class
  • c) a way for parent classes to define its own version of a method defined by its child class
  • d) a way for child classes to define its own version of a method defined by its parent class

Pregunta 85

Pregunta
85. A virtual method of a parent class must be overridden for by each derived classes.
Respuesta
  • True
  • False

Pregunta 86

Pregunta
86. A virtual method of a parent class must not be overridden for by each derived classes.
Respuesta
  • True
  • False

Pregunta 87

Pregunta
87. A virtual method of a parent class has its own implementation body block.
Respuesta
  • True
  • False

Pregunta 88

Pregunta
88. A virtual method of a parent class has not its own implementation body block.
Respuesta
  • True
  • False

Pregunta 89

Pregunta
89. An abstract method of a parent class has its own implementation body block.
Respuesta
  • True
  • False

Pregunta 90

Pregunta
90. An abstract method of a parent class has not its own implementation body block.
Respuesta
  • True
  • False

Pregunta 91

Pregunta
91. An abstract method of a parent class must be overridden for by each child class.
Respuesta
  • True
  • False

Pregunta 92

Pregunta
92. An abstract method of a parent class must not be overridden for by each child class.
Respuesta
  • True
  • False

Pregunta 93

Pregunta
93. Which feature is not related to an abstract class?
Respuesta
  • a) it is impossible to create an instance(object) of an abstract class
  • b) all abstract methods and properties of a basic class have not to be realized in a derived class
  • c) the abstract class may contain both abstract and common methods/properties
  • d) all abstract methods and properties of a basic class have to be realized in a derived class

Pregunta 94

Pregunta
94. An interface is defined using...
Respuesta
  • a) the capital letter “I” in the name
  • b) the interface keyword
  • c) the abstract keyword
  • d) the virtual keyword

Pregunta 95

Pregunta
95. An interface defines …
Respuesta
  • a) the method signature
  • b) the virtual methods
  • c) the common methods
  • d) the abstract methods

Pregunta 96

Pregunta
96. Classes that implement an interface are contractually required to implement the interface signature definition and can’t alter it.
Respuesta
  • True
  • False

Pregunta 97

Pregunta
97. A class can support as many interfaces as necessary.
Respuesta
  • True
  • False

Pregunta 98

Pregunta
98. A class can support only one interface.
Respuesta
  • True
  • False

Pregunta 99

Pregunta
99. A class cannot support as many interfaces as necessary.
Respuesta
  • True
  • False

Pregunta 100

Pregunta
100. "Has-a" relationship is ...
Respuesta
  • a) traditional form of code reuse in the world of OPP
  • b) another form of code reuse in the world of OOP
  • c) traditional form of data protection in the world of OOP
  • d) another form of data protection in the world of OOP

Pregunta 101

Pregunta
101. "Has-a" relationship commonly includes ...
Respuesta
  • a) encapsulation and composition terms
  • b) aggregation and polymorphism terms
  • c) polymorphism and composition terms
  • d) aggregation and composition terms

Pregunta 102

Pregunta
102. "Has-a" relationship must establish parent/child relationships.
Respuesta
  • True
  • False

Pregunta 103

Pregunta
103. The "has-a" relationship allows one class to define a member variable of another class and expose its functionality (if required) to the object user indirectly.
Respuesta
  • True
  • False

Pregunta 104

Pregunta
104. The .NET Framework allows to work with graphics using the ...
Respuesta
  • a) System.Drawing namespace
  • b) System.IO namespace
  • c) System.Windows.Form namespace
  • d) System.Data namespace

Pregunta 105

Pregunta
105. Which class is used to draw lines, curves and shapes?
Respuesta
  • a) The Brush class
  • b) The Pencil class
  • d) The Region class
  • c) The Pen class

Pregunta 106

Pregunta
106. Which class is used to fill shapes?
Respuesta
  • a) The Brush class
  • b) The Pencil class
  • c) The Pen class
  • d) The Region class

Pregunta 107

Pregunta
107. Choose the correct code to specify the location of control?
Respuesta
  • a) button1.Size = new Size(10,10);
  • b) button1.Location = Point(10,10);
  • c) button1.Location(10,10);
  • d) button1.Location = new Point(10,10);

Pregunta 108

Pregunta
108. Choose the correct code to specify the size of control?
Respuesta
  • a) button1.Size = new Size(10,10);
  • b) button1.Location = Point(10,10);
  • c) button1.Location(10,10);
  • d) button1.Location = new Point(10,10);

Pregunta 109

Pregunta
109. Which properties of controls can be used to specify its location?
Respuesta
  • a) Size
  • b) Left, Right, Top, Bottom
  • c) ForeColor and BlackColor
  • d) Left, Right

Pregunta 110

Pregunta
110. Drawing begins with the ...
Respuesta
  • a) System.Drawing.Pen class
  • b) System.Drawing.Graphics class
  • c) System.Drawing.Brush class
  • d) System.Drawing.Image class

Pregunta 111

Pregunta
111. To use Draw methods of the graphic object, we must provide an instance of the Pen class.
Respuesta
  • True
  • False

Pregunta 112

Pregunta
112. To use Draw methods of the graphic object, we must provide an instance of the Brush class.
Respuesta
  • True
  • False

Pregunta 113

Pregunta
113. Graphics.DrawLines, Graphisc.DrawPolygon, and Graphics.DrawRectangles accept arrays as parameters to allow us to create more complex shapes.
Respuesta
  • True
  • False

Pregunta 114

Pregunta
114. To use Fill methods of the graphic object, we must provide an instance of the Brush class.
Respuesta
  • True
  • False

Pregunta 115

Pregunta
115. To use Fill methods of the graphic object, we must provide an instance of the Pen class.
Respuesta
  • True
  • False

Pregunta 116

Pregunta
116. What method returns a String array containing the substrings in this instance that are delimited by elements of a specified char array or string array? Answer: Split!
Respuesta
  • True
  • False

Pregunta 117

Pregunta
117. An enumerated type is declared using the … keyword. Answer: Enum
Respuesta
  • True
  • False

Pregunta 118

Pregunta
118. By default, the first enumerator has the value…
Respuesta
  • 0
  • 1
  • 2
  • 9

Pregunta 119

Pregunta
119. C# structures are created with … keyword.
Respuesta
  • struct
  • new
  • is

Pregunta 120

Pregunta
120. Virtual methods are defined in …
Respuesta
  • Parent class
  • Child class

Pregunta 121

Pregunta
121. What big advantage of using interfaces ?
Respuesta
  • Is that class can implement multiple interfaces;
  • Is that class can not implement multiple interfaces;

Pregunta 122

Pregunta
122. Is it enough to create polymorphic methods using the "virtual" and "override" keywords?
Respuesta
  • True
  • False

Pregunta 123

Pregunta
123. Inheritance allows to build …
Respuesta
  • a dependency between two or more class
  • a dependency only between two

Pregunta 124

Pregunta
174. Which of the following returns true if at least one expression is true?
Respuesta
  • and
  • or

Pregunta 125

Pregunta
175. Which of the following returns true if two expressions are true?
Respuesta
  • and
  • not

Pregunta 126

Pregunta
176. The keywords of the Switch statement are ...
Respuesta
  • switch, case default, goto, return, throw
  • for, case default, goto, return, throw
  • begin,end,swap

Pregunta 127

Pregunta
125. The int type is …
Respuesta
  • value,predefined
  • reference,predefined
  • value,user-defined
  • reference,user-defined

Pregunta 128

Pregunta
126. The bool type is …
Respuesta
  • value,predefined
  • reference,predefined
  • value,user-defined
  • reference,user-defined

Pregunta 129

Pregunta
127. The char type is …
Respuesta
  • value,predefined
  • reference,predefined
  • value,user-defined
  • reference,user-defined

Pregunta 130

Pregunta
128. The long type is …
Respuesta
  • value,predefined
  • reference,predefined
  • value,user-defined
  • reference,user-defined

Pregunta 131

Pregunta
129. The float type is …
Respuesta
  • value,predefined
  • reference,predefined
  • value,user-defined
  • reference,user-defined

Pregunta 132

Pregunta
130. The double type is …
Respuesta
  • value,predefined
  • reference,predefined
  • value,user-defined
  • reference,user-defined

Pregunta 133

Pregunta
131. The class type is …
Respuesta
  • reference, user-defined
  • value,predefined
  • value,user-defined
  • reference,predefined

Pregunta 134

Pregunta
132. The interface type is …
Respuesta
  • reference, user-defined
  • value,user-defined
  • value,predefined
  • reference,predefined

Pregunta 135

Pregunta
133. The object type is…
Respuesta
  • value,predefined
  • value,user-defined
  • reference,user-defined
  • reference,predefined

Pregunta 136

Pregunta
134. The string type is …
Respuesta
  • reference,predefined
  • value,predefined
  • value,user-defined
  • reference,user-defined

Pregunta 137

Pregunta
135. The struct type is …
Respuesta
  • value, user-defined
  • reference,user-defined
  • value,predefined
  • reference,predefined

Pregunta 138

Pregunta
136. The enum type is …
Respuesta
  • value, user-defined
  • reference,user-defined
  • reference,predefined
  • value,predefined
Mostrar resumen completo Ocultar resumen completo

¿Quieres crear tus propios Tests gratis con GoConqr? Más información.

Similar

Object Oriented Programming Concepts
Cmagapu
Concepts of Objects and Classes
BK Modding
Introduction to Java
BK Modding
Paradigma de Programación Orientado a Objetos
JULIAN CAMILO RIVEROS FONSECA
1.2.4 OOP
Louis N
constructor
balakvm.it
Classes
needajob517
Class
Erick Gonzalez
OOP Definitions
Matt Dumbrill
Object Oriented Programming Concepts
agni bharathi
Object Oriented Programming Concepts
Rian McCollom
Explorar la Librería