CCP Programming Concepts & Application Development 2

Question 1

Which design pattern ensures a class has only one instance and provides a global point of access to it?

Accepted Answer

Singleton

Answer

The Singleton pattern restricts instantiation of a class to one object and provides a global access point.

Question 2

In object-oriented programming, what term describes a subclass providing a specific implementation of a method already defined in its parent class?

Accepted Answer

Overriding

Answer

Method overriding allows a subclass to provide its own implementation of a method inherited from a superclass.

Question 3

What is the time complexity of binary search on a sorted array of n elements?

Accepted Answer

O(log n)

Answer

Binary search repeatedly halves the search space, resulting in O(log n) time complexity.

Question 4

Which software development methodology emphasizes iterative development, customer collaboration, and responding to change?

Accepted Answer

Agile

Answer

Agile methodology prioritizes iterative delivery, continuous feedback, and flexibility over rigid upfront planning.

Question 5

In a relational database context, what does ACID stand for?

Accepted Answer

Atomicity, Consistency, Isolation, Durability

Answer

ACID stands for Atomicity, Consistency, Isolation, and Durability — the four properties that guarantee reliable database transactions.

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