The pattern that provides a way to access the elements of an aggregate object sequentially without exposing its underlying representation 1. Iterator 2. Command 3. Visitor 4. Strategy
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The pattern that provides a way to access the elements of an aggregate object sequentially without exposing its underlying representation
1. Iterator
2. Command
3. Visitor
4. Strategy
According to the information given:-
We have to choose the correct option to satisfy the statement.
Step by step
Solved in 2 steps
- Open your text editor and create a new document named model.php model.php will connect to a database potentially return PDO statement objects to the controller for processing. This question is complete and requires use of initMessagesfunction initMessages($tim) This method will take a single parameter of unix time using the method “time()”. It will conditionally select fromthe table “messages” the minimum id and rename it to “min_id”. The condition is that the field time is greater thanthe parameter for time. The return is the PDOStatement object with the row data from a query.An aggregate object refers to an instance of a class that ....... (FILL IN THE GAP ) A contains attributes B contains private attributes C contains static methods D contains private methods E contains other objects1. Which design pattern lets you define a new operation without changing the classes of the elements on which it operates? A) Visitor B) Command C) Decorator D) Chain of Responsibility 2. Which design pattern decouples the object that invokes the operation from the one that knows how to perform it? A) Command B) Strategy C) Visitor D) State 3. Which pattern to use when more than one object can handle a request and the handler is unknown? A) Chain of Responsibility B) State C) Visitor D) Command 4. The Tic-Tack-Toe is a classical Artificial Intelligence problem for which many algorithms have been proposed to solve it over the years. You were asked to provide a software component where the user can choose one algorithm at a time and try it. Which design pattern you will use? A) Strategy B) Visitor C) Chain of Responsibility D) Command
- True or False An aggregate object is composed of many static constants and forms an is-a relationship.While mapping an object model to a relational database, we have two options for realizing inheritance: vertical mapping (using a separate table for the parent class) and horizontal mapping (duplicating columns). In which of the following cases you prefer vertical mapping? I. You anticipate that the parent class will change often in the future. II. Query response time is not a major concern. III. Run-time efficiency is the main design goal. IV. Modifiability is the main design goal. A Only III B II and IV C I, II, and IV D I and III E All of themSO B N SO RS N Ny M S R T e Problem You want an instance to delegate attribute access to an internally held instance possibly as an alternative to inheritance or in order to implement a proxy.
- Match the advantages of the Java Collection Framework to its respective description. a. Performance b. Reusability c. Maintainability d. Extensibility a. The collection framework creates extremely effective and efficient data structures, which improve a program's speed and accuracy. b. Collection Framework classes can easily be mixed with other types, resulting in increased code reusability. c. The collection framework's code is simple to maintain since it ensures data consistency and interoperability throughout the implementation. d. Java's Collection Framework allows programmers to customize primitive collection types to meet their needs.Which statement(s) are false about Map?* It cannot contain duplicate keys and each key can map to at most one value. It is an object that maps keys to values, or is a collection of attribute-value pairs. It can map a key to a function. A Map is an object that maps functions to values, or is a collection of attribute-value pairs.could i get help on this question Develop a sequence diagram for the process of registering a course at a university with the following guidelines: The student requests a list of courses that can be registered. The system would check the offered courses that the student can register. The sections along with their offered times will be fetched. The student would select a suitable time. The system should make sure that the time selected does not conflict with another registered course by the student. 1 Create instances (objects) for the classes UserInterface, StudentInformationSystem, Course, Student. 2 Create a minimum of 8 messages and represent the message calls between all the objects. 2 of the messages must be self‐messages (a message from the object to itself). 3 Make sure the object lifelines and the activations are well represented and clear
- Given there is a Textfield called studentNameTXT, a Dataset called theData, and a table called Student within the theData, and a field name called first_name. Write a code snippet to bind the student name to studentNameTXTWrite a PHP application that creates a class that allows connection to a specific MySQL database, allowing the specification (by setting some properties) of the location server, user, password, and database name. Give a example of instantiating it (creating an object) and using it in an application with a MySQL tableThis exercise will be about processing a collection of bank transactions using an iterator. A particular account owner may have multiple transactions. Assume a classed named BankXA that contains info about a customer's transaction. The class has 4 public attributes:string acctOwner //The name of the account's ownerstring xaDetail //some detail on the transactionstring type // assume the value will always be either "dep" for a deposit or "withd" for withdrawal, no other values double amt //the amount of the transaction. The amount will always be 0 or more Note that these attributes are public therefore you will NOT need setters and getters for this exercise. Your program will obtain a pointer to a list of BankXA. Your program must iterate the list using an iterator and the result must be like the following: J. Faune withdrew -$485.00 I. Boesky withdrew -$42885.50 J. Faune deposited +$2.50 Where J. Faune and I. Boesky are the acctOwners,the withdrew and deposited refer to the type "dep"…