Android Quiz 3 24.2.2023

When the activity is not in focus, but still visible on the screen it is in?

• A. running state B. paused state C. stopped state D. destroyed state
• A. running state B. paused state C. stopped state D. destroyed state
• A. running state B. paused state C. stopped state D. destroyed state
• A. running state B. paused state C. stopped state D. destroyed state

Which of the following choices is considered Android application storage?

• SharedPreferences
• Android’s file system
• External Storage
• Text file

What does API stand for?

• Application Programming Interface
• Android Programming Interface
• Android Page Interface
• Application Page Interface

"What is the difference between Activity context and Application Context? "

• The Activity instance is tied to the lifecycle of an Activity. while the application instance is tied to the lifecycle of the application,
• The Activity instance is tied to the lifecycle of the application, while the application instance is tied to the lifecycle of an Activity.
• All of the above
• none of the above

……………. controls life cycle of activities and manages activity stack level requirements

• Windows Manager
• Content Provider
• Activity Manager

Android tries hard to ……………. low-level components, such as the software stack, with interfaces so that vender-specific code can be managed easily.

• confound
• abstract
• modularize
• compound

"Which of the following statements are correct?

• HashMap doesn't allow any null key or value
• HashMap allows one null key and multiple null values
• HashTable doesn't allow any null key or value
• HashTable allows one null key and multiple null values

What are different between Object Pool and Flyweight?

• Flyweights are commonly immutable instances, while Object Pool usually are mutable.
• Flyweight always re-uses object with the same state but Object Pool maybe re-uses object with different state.
• Flyweight is a container for a set of domain objects while Object Pool usually is a domain object.
• Flyweight saves memory by not creating new objects and reusing existing ones when possible. Object Pool just re-uses provided objects without creating new ones.

What is the design pattern which is implemented by using Factory pattern and configures object dynamically for Prototype pattern?

• Singleton
• Template Method
• Strategy
• Abstract Factory

Which is not type of Proxy pattern?

• Virtual
• Protection
• Remote
• Public