CommerceIQ Back Office Executive Interview Questions and Answers

Normal java coding question

Q1. What are spring ioc
Ans. 
Spring IoC (Inversion of Control) is a design pattern where the control of object creation and lifecycle is shifted to a container or framework.
• In Spring IoC, objects are created and managed by the Spring container.

• It helps in achieving loose coupling between classes.

• Dependency Injection is a key feature of Spring IoC, where dependencies of a class are injected by the container.

• Example: @Autowired annotation in Spring
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Q2. Different implementation of map interface
Ans. 
The Map interface in Java provides a way to store key-value pairs and retrieve values based on keys.
• Different implementations of the Map interface include HashMap, TreeMap, LinkedHashMap, and ConcurrentHashMap.

• HashMap provides constant-time performance for basic operations but does not guarantee the order of elements.

• TreeMap maintains elements in sorted order based on keys.

• LinkedHashMap maintains the insertion order of...read more
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