Salesforce CRM Java Developer Mock Interview

Practice 20 Salesforce CRM Java Developer interview questions covering Apex, integration patterns, and backend architecture.

Question 5 of 20

In your opinion, Is Java Pass By Value or Pass By Reference?

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William Swansen

William Swansen has worked in the employment assistance realm since 2007. He is an author, job search strategist, and career advisor who helps individuals worldwide and in various professions to find their ideal careers.

You may note that this question asks you for your opinion, even though it is technical. Not all technical questions have finite answers. Some may be relevant to the work you do or the type of experience you have writing programs. It is okay to state an opinion about a topic as long as you can support your answer. When asked a question of this type during the interview with Salesforce, you can anticipate follow-up questions asking why you believe this to be the right answer.

William Swansen

"This is an interesting question. If you ask the current Java developers working here at Salesforce, some will say that Java is pass by value, while the others will say pass by reference. In my opinion, Java is pass by value. This is how it is defined in the Java Spec. Java method parameters directly associate variable passing and method calling. The exception is when we pass a reference of complex types defined as method parameters, the memory address is copied to a new reference variable."

Anonymous Answer

Java is a pass-by-value language as Java method parameters directly associate variable passing and method calling. There can be some complexity involved when passing variables and through a method, because these are then copied as a new object reference.

Marcie's Feedback

Nice! The interviewer will appreciate that you've clearly and directly answered the question. Can you possibly include an example of a pass-by-reference?

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20Salesforce CRM Interview Questions & Answers

Java Developer

1.Since many Salesforce applications are developed using Java. can you tell me what the key elements of the Java programming language are ?

Java Developer

2.Within Java, what are the differences between Path and Classpath variables?

Java Developer

3.Can you discuss the importance of the main() method in Java?

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4.How is Enum used in Java?

Java Developer

5.In your opinion, Is Java Pass By Value or Pass By Reference?

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6.Can you define the final keyword in Java?

Java Developer

7.How is a volatile keyword used in Java?

Java Developer

8.Can you discuss what a static import is and what the pitfalls of using this are?

Java Developer

9.Salesforce developers usually write their programs using Java. Can you describe how access modifiers are used in Java?

Java Developer

10.What is Composition, as used in Java?

Java Developer

11.Tell me about the Java Reflection API?

Java Developer

12.What is a marker interface, and how do you use it when writing Java code for the Salesforce CRM environment?

Java Developer

13.Can you tell me what a Compare and Swap algorithm is and how you use it when coding in Java?

Java Developer

14.Can you discuss the differences between a user and a daemon thread?

Java Developer

15.Talk about what a Java timer class is and how you schedule a task to run after a specific interval?

Java Developer

16.Please define a CountDownLatch in the context of Java?

Java Developer

17.How does an OutOfMemoryError impact a program written in Java, and how can this be corrected?

Java Developer

18.When programming in Java, can you have an empty catch block?

Java Developer

19.Please describe the JDBC API and discuss how it is used?

Java Developer

Salesforce CRM Java Developer Mock Interview

In your opinion, Is Java Pass By Value or Pass By Reference?

20Salesforce CRM Interview Questions & Answers

1.Since many Salesforce applications are developed using Java. can you tell me what the key elements of the Java programming language are ?

2.Within Java, what are the differences between Path and Classpath variables?

3.Can you discuss the importance of the main() method in Java?

4.How is Enum used in Java?

5.In your opinion, Is Java Pass By Value or Pass By Reference?

6.Can you define the final keyword in Java?

7.How is a volatile keyword used in Java?

8.Can you discuss what a static import is and what the pitfalls of using this are?

9.Salesforce developers usually write their programs using Java. Can you describe how access modifiers are used in Java?

10.What is Composition, as used in Java?

11.Tell me about the Java Reflection API?

12.What is a marker interface, and how do you use it when writing Java code for the Salesforce CRM environment?

13.Can you tell me what a Compare and Swap algorithm is and how you use it when coding in Java?

14.Can you discuss the differences between a user and a daemon thread?

15.Talk about what a Java timer class is and how you schedule a task to run after a specific interval?

16.Please define a CountDownLatch in the context of Java?

17.How does an OutOfMemoryError impact a program written in Java, and how can this be corrected?

18.When programming in Java, can you have an empty catch block?

19.Please describe the JDBC API and discuss how it is used?

20.What are some examples of JDBC drivers you would use when programming applications for Salesforce?