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The following are object-oriented basic principles ( )

The meaning of the Open-Close principle is that a software entity ( )

Be dependent on abstractions, not concrete. That is, programming for the interface, not for the implementation, is the expression of ( )

According to the idea of design pattern, the priority should be used in program development ( ) Relation to achieve reuse.

The two major themes of design patterns are ( )

"Don't talk to strangers" is a popular expression of principle ( )

Which design pattern is represented by the following class diagram? ( )（含图）

In the observer mode, the wrong statement is ( )

A bit of a misnomer for object composition is ( )

The wrong statement about inheritance is: ( )

Advantages of design patterns. ( )

Both the text display class (TextView) and the picture display class (PictureView) in the system inherit the component class (Component) to display text and picture content respectively. Now it is necessary to construct a scroll bar, or a black border, or an existing scroll There are text display controls and image display controls with black borders, but I hope to add only three classes at most, ( ) Design patterns can achieve that.

If a sub-module in the system needs to provide other modules with access to different database systems (Oracle, SQL Server, DB2 UDB, etc.), the access interfaces provided by these database systems are somewhat different, but the access

Process is the same. For example, first connect to the database, then open the database, and finally query the data, ( ) the design pattern can abstract the same database access process;

Which design pattern is represented by the following class diagram? ( )

Which of the following modes uses an object to quickly generate a batch of objects ( )

The Behavioral Class pattern uses ( ) to distribute behavior between classes.

Which of the following statements about static factories and factory methods is incorrect: ( )

The pattern of encapsulating behavior distributed across multiple classes is ( )

The Observer pattern does not apply to ( )

If there is a 2M text (English alphabet), in order to classify and count the letters in it, if it is not practical to define an object for each letter in the text, the best available mode for this problem is ( )

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