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The Singleton Pattern is a design pattern used to restrict a class to only one instance, ensuring that the same instance is globally accessible across the application. This pattern is particularly useful in cases like logging, configuration management, or database connections, where multiple instances could lead to resource conflicts or inefficiencies. The Singleton Pattern is typically implemented by making the class constructor private, defining a static method for instance retrieval, and storing the single instance in a static variable. This setup ensures that the instance is created only once and reused throughout the application, conserving resources and maintaining consistency by providing a unified point of interaction. Option A (Factory Pattern) - The Factory Pattern is focused on creating objects based on input parameters without limiting the number of instances, unlike Singleton, which restricts instantiation. Option C (Observer Pattern) - Observer Pattern establishes a dependency between objects, allowing them to notify others of changes, differing from Singleton’s focus on single-instance enforcement. Option D (Strategy Pattern) - Strategy Pattern is used to select algorithms dynamically at runtime, focusing on behavioral variability rather than instance control. Option E (Decorator Pattern) - The Decorator Pattern enhances objects with additional functionalities dynamically, unrelated to the Singleton goal of limiting instance creation.
An 800 ml mixture consists of 60% milk. After adding ‘x’ ml of milk and ‘2x’ ml of honey, the milk-to-honey ratio changes to 9:10. Determine the...
In 100 litres of a mixture (milk + water), ratio of quantity of milk to that of water in a mixture is 5:3, respectively. (2x + 18.6) litres of milk and ...
A jar contains a mixture of milk and water in the ratio of 3:5. Initially, 30 liters of the mixture is removed from the jar and replaced with an equal a...
A 480 ml mixture has milk and honey in the ratio 7:h. After adding 96 ml of milk and 24 ml of honey to this mixture, the ratio of...
In a mixture of 120 litres, milk was 58(1/3)% and rest was water. If (x + 15) of the mixture is taken out and add 8 litres of milk in it, then the diff...
If 100 liters of milk solution contains 60% milk, how much milk should be added to make the solution 80% milk?
140 litres of mixture contains water and milk in the ratio 3:7 respectively. If 40 litres of the mixture is replaced by same quantity of water, then fin...
A mixture of milk and water contains 40% water. On adding 15 litres of water, the quantity of milk becomes 20% more than that of water. Find the initial...
A 30-litre mixture consists of milk and water in the ratio of 5:7. To this mixture, 2.5 litres of milk and 4.5 litres of water are added. How much more ...
In a 168-litre mixture, the proportion of milk to honey is 5:2. If 'p' litres of honey are added to this mixture, making the new ...