CODETRU Interview Questions and Answers

HashMap is a data structure that stores key-value pairs and allows for fast retrieval of values based on keys.

• HashMap is part of the Java Collections framework.

• It uses hashing to store key-value pairs in an array.

• It allows for quick retrieval of values based on keys.

• Example: HashMap map = new HashMap<>();

Bean life cycle refers to the stages a Java bean goes through from instantiation to destruction.

• Initialization: Bean is instantiated and its properties are set.

• Population: Dependencies are injected into the bean.

• In use: Bean is actively being used by the application.

• Destruction: Bean is removed from the application context.

Lead generation techniques involve identifying potential customers and nurturing them into sales-ready leads.

• Identify target audience through market research

• Create compelling content to attract leads

• Utilize social media and email marketing

• Offer incentives such as free trials or consultations

• Partner with other businesses for referrals

• Attend industry events and conferences

• Use lead generation tools such as lead magnets an