Appdev Midterm Quiz 1

Question 1

Is a set of statements to perform a specific task

Answer 1

Functions

Question 2

Organize the
program into logical blocks of code.

Answer 2

Functions

Question 3

are the building blocks of readable, maintainable, and reusable code.

Answer 3

Functions

Question 4

This process is termed as function
invocation.

Answer 4

Calling a Function

Question 5

Return value along with the control, back to the
caller.

Answer 5

Returning Function Values

Question 6

The return statement is optional. If not specified, the function returns null? (True/False)

Answer 6

True

Question 7

A function can return at the most ____ value.

Answer 7

1

Question 8

form a part of the function’s signature

Answer 8

Parameters

Question 9

are a mechanism to pass
values to functions.

Answer 9

Parameters

Question 10

The parameter values are
passed to the function during its invocation (True / False)

Answer 10

True

Question 11

is a programming
language model in which programs are organized around data, or objects, rather than functions and
logic.

Answer 11

Object-Oriented Programming

Question 12

is an abstraction meant to represent a component of a program

Answer 12

Object

Question 13

Objects cannot be
created, destroyed, given attributes, and made to perform actions (True / False)

Answer 13

False

Question 14

The ____ of an object is its type

Answer 14

class

Question 15

Every object belongs to a class (True or False)

Answer 15

True

Question 16

Objects of the same class have the same instance
variables and methods available to them (although the value of those instance variables may
differ) (True or False)

Answer 16

True

Question 17

a blueprint for creating objects (a particular data structure), providing initial values for state (member variables or attributes), and implementations of behavior (member functions or
methods)

Answer 17

Class

Question 18

A class definition starts with the keyword _____

Answer 18

class

Question 19

any variable declared in a class. Represent data pertaining to objects.

Answer 19

Fields

Question 20

Allows the program to initialize and retrieve the values of the fields of
a class.

Answer 20

Setters and Getters

Question 21

A default getter/ setter is associated with every class. However, the default ones can
be overridden by explicitly defining a setter/ getter. (True or False)

Answer 21

True

Question 22

responsible for allocating memory for the objects of the class.

Answer 22

Constructors

Question 23

represent actions an object can take

Answer 23

Functions

Question 24

They are also at times referred to as methods

Answer 24

Functions

Question 25

The ___ keyword is responsible for instantiation.

Answer 25

new

Question 26

The right-hand side of the expression invokes the constructor (True or False)

Answer 26

True

Question 27

is a special function of the class that is responsible for initializing the variables of the class

Answer 27

Dart Constructors

Question 28

Dart defines a constructor with the same name as that of the ____

Answer 28

class

Question 29

A constructor is a function and hence cannot be parameterized. (True or False)

Answer 29

False

Question 30

However, unlike a function, constructors cannot have a return type. If you don’t declare a constructor, a default no-argument constructor is provided for you (True or False)

Answer 30

True

Question 31

enable a class define multiple constructors.

Answer 31

Named Constructor

Question 32

also called as accessors and mutators

Answer 32

Getters and Setters

Question 33

, allow the program to initialize and retrieve the values of class fields respectively

Answer 33

Getters and Setters

Question 34

Setters or mutatord are defined using the ___ keyword

Answer 34

set

Question 35

Getters or accessors are defined using the ___ keyword

Answer 35

get

Question 36

The ____ keyword refers to the current instance of the class in a method or constructor with parameters

Answer 36

this

Question 37

inherit members from parent class

Answer 37

Inheritance

Question 38

Access class through parents interface

Answer 38

Polymorphism

Question 39

Define and execute abstract actions

Answer 39

Abstraction

Question 40

Hide internal properties of the class

Answer 40

Encapsulation

Question 41

The class giving its members to its child class

Answer 41

Base class / Parent Class

Question 42

The class taking members from its base class

Answer 42

Derived Class / Child Class

Question 43

used in conjunction with the object to access a class’s data members

Answer 43

Period operator (.)

Question 44

- to enable a class define multiple constructors

Answer 44

Name Constructors

Question 45

- allows child classes (derived) to inherit the characteristics of an existing parent class (base)

Answer 45

Inheritance

Question 46

* Child classes inherits all properties and methods excepts constructors of the parent class

Answer 46

True

Question 47

when a class inherits a single parent class

Answer 47

Single inheritance

Question 48

when a class inherits more than one parent class

Answer 48

Multiple inheritance

Question 49

when a class inherits another child class

Answer 49

Multi-level inheritance

Question 50

More than one class having the same parent class

Answer 50

Hierarchical inheritance

Question 51

Like Java, Dart supports multiple inheritance (True or False)

Answer 51

False

Question 52

Child classes inherits all properties and methods excepts constructors of the parent class (True or False)

Answer 52

True1

Question 53

Every class can at the most extend from one parent class

Answer 53

Single Inheritance

Question 54

A class can inherit properties of the base class from another child class.

Answer 54

Multi – level Inheritance

Question 55

Hierarchical Inheritance

Answer 55

More than one classes have the same parent class

Question 56

A Hierarchical type of inheritance only that inherits properties of parent class only that it overrides the same method declared in child class It will execute the correct function code based on the type of the variable.

Answer 56

Polymorphism

Question 57

define and execute abstract actions. Ignoring irrelevant features, properties, or functions and emphasizing on relevant ones. Abstraction helps manage complexity.

Answer 57

Abstraction

Question 58

Hides implementation detail. - class announces only a few operations (methods) available to objects - all data members(fields) of the class are hidden and can only be accessed via properties (read-only and read-write)

Answer 58

Encapsulation

Question 59

specifies what and how a specific task would be done.

Answer 59

function definition

Question 60

It is not mandatory to specify the data type of the parameter.

Answer 60

True

Question 61

The data type of the value passed must match the type of the parameter during its declaration.

Answer 61

True

Question 62

void function_name(param1, [optional_param_1, optional_param_2]) { }

Answer 62

Optional Positional Parameter

Question 63

To specify optional positional parameters, use_____

Answer 63

[]

Question 64

Unlike positional parameters, the parameter's name must be specified while the value is being passed

Answer 64

Optional named parameter

Question 65

____ braces can be used to specify optional named parameters.

Answer 65

{} / Curly braces

Question 66

void main() { test_param(123); test_param(123,s1:'hello'); test_param(123,s2:'hello',s1:'world'); } test_param(n1,{s1,s2}) { print(n1); print(s1); }

Answer 66

Optional named parameter

Question 67

void main() { test_param(123); } void test_param(n1,{s1:12}) { print(n1); print(s1); }

Answer 67

Optional Parameters with Default Values

Question 68

Function parameters can also be assigned values by default. However, such parameters can also be explicitly passed values.

Answer 68

True

Question 69

is any variable declared in a class. represent data pertaining to objects.

Answer 69

Fields

Question 70

Allows the program to initialize and retrieve the values of the fields of a class.

Answer 70

Setters and Getters

Question 71

responsible for allocating memory for the objects of the class.

Answer 71

Constructors

Question 72

represent actions an object can take. They are also at times referred to as methods.

Answer 72

Functions

Question 73

These components(Fields, Setters and Getters, Methods or Functions, Constructors) put together are termed as the

Answer 73

data members

Question 74

A default getter/ setter is associated with every class. However, the default ones can be overridden by explicitly defining a setter/ getter.

Answer 74

True