Outseer Interview Questions and Answers

Double check Singleton Design Pattern ensures only one instance of a class is created.

• Create a private static instance variable in the class.

• Use a private constructor to prevent external instantiation.

• Implement a static method to return the instance, checking for null and creating a new instance if needed.

Volatile and transient are both keywords in Java used for different purposes. Volatile is used for variables that can be accessed by multiple threads, while transient is used to indicate that a variable should not be serialized.

• Volatile keyword is used to indicate that a variable's value will be modified by different threads.

• Transient keyword is used to indicate that a variable should not be serialized during object se...read more

String pool is a storage area in memory where unique string literals are stored to optimize memory usage.

• String pool is a part of the Java heap memory where unique string literals are stored.

• String literals are created using double quotes, and they are stored in the string pool.

• When a new string is created with the same value as an existing string literal, it refers to the same object in the string pool.

• String pool hel...read more