Java Development Mock Interview | Part 2 | Interview Questions for Java Developers

This fresh chapter of Turing Mock Interview takes a look at technical interview questions that often appear in a Java Development interview. Watch the video to understand the concepts you must brush up on before sitting for a Java test and interview. Let us know in the comments below which tech stack you'd like us to cover next.

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[JYNxpre]

Hi Developers, I hope this can help you with questions in this interesting interview.

1. Could you please introduce yourself and tell me a litle bit about your background experience? 0:37
2. Could you please tell me a litle bit more about some Java projects that you have been working on? 1:45
3. Is there anything like a static class? 2:36
4. What are the use case for a static class? 4:06
5. How can i syncronize two process in Java? 5:05
6. What is static initializer and the end and they are related to static class or is the total different? 6:25
7. What's the difference between fail fast and Fail safe? 7:33
8. What is the structure of Java Heap? 8:47
9. What's the trade-off between using an unordered array and using a ordered array? 10:06
10. Can you explain marshalling and unmarshalling? 12:12
11. What is the difference between serial and throughput garbage collector? 14:05
12. When we use Linked List over an ArrayList in Java? 14:38
13. Why use Array of char is preferred for password over a string? 15:30
14. Could you please provide examples when a finally block won't be excecuted in Java? 16:09
15. Why is a string length accurate? 17:15

If you want to discuss some questions, please comment to do them together.

Regards

[tobigforyou]

I think the trick to passing these interviews is having an extremely thick accent so that no one, including the interviewer understands what you're saying.

[coudiaexplore]

Java heap is the main memory space available for all programs that may be running on the system and it is where we have the String pool, the soft reference, the weak reference, and hard references.

[PRISOM]

02:25 Peter has substantial experience in Java development and has worked on biometric authentication solutions.
04:50 In Java, there is no traditional static class, but it can be simulated by making the class final, constructor private, and all fields and methods static.
07:15 Static initializers in Java and synchronizing two Java processes
09:40 Static initializer and fail fast vs fail safe
12:05 Difference between dead objects and their impact on memory management
14:30 Marshalling and demarshalling in Java
16:55 Use linked lists for faster insertion, ArrayList for faster access
19:19 Java's string length is not accurate due to handling of characters outside the basic multilingual plane.
Crafted by Merlin AI.

[coudiaexplore]

fail-fast and fail-safe is related to all collections(those implementing the Iterable interface), mainly the way the iterator works for thread-safe vs non-thread-safe collection
non-thread-safe collections will throw ConcunrentModifException if we try to remove an element while looping for example. of course, is more than that

[coudiaexplore]

Static classes are generally used for utility functions via static methods

[yaphetb]

Marker interfaces are iterfaces that doesn't have any methods inside them and they are just used to tag a class for JVM for some special behavior . For example Seriazable & Cloneable intrefaces are marker interfaces.

[eugenegusev]

there is an interesting question about ordered and unordered array. I wonder what data type did you keep in your mind? in the case we have 1 millions entries in array with values from 1 to 10. and let's say 900 thousands of them are 1. what is the time complexity to find out an index of 1st element with value 3 or 4 in this arrays? and why?

[rekhabalakrishna]

Marker interface is an interface with no methods declared in it

[coudiaexplore]

Static initializer is not related to static class, it is just a block of code that must be run before the constructor and is mainly used for data initialization or initialization of heavy process/object.

[coudiaexplore]

In Java, process synchronization can be done via the built classes present in java. util.concurrent like Lock, Semaphore, CompletableFuture, and so on. I think this question was about multithreading.

[elianosetekpo]

Hi Jose,
Can you also cover a C# . Thanks!

[coudiaexplore]

It is possible to have a static class in java, for example, an inner class can be static

[mmmm-wmci]

Will this helo in cracking turing java assessment

[ernestsakala]

I have been waiting to get matched its been almost a year

[AshutoshMohanty]

Marker interface are used as a indication for JVM to process certain actions. Like Serializable or Clonable. When you don't mark a class with these markers then you might get NotSerializabeException or CloneNotSupportedException kind of errors.

[aaqibhamdule]

Hi, I Have completed all pre-screening tests, and finalised my profile, when should I expect my intro call?

[NiteshSingh-bvlu]

Hi Jose,
I am Nitesh Singh from India. I am a senior Android developer with a total of 5.6 years experience . Currently looking for new job in out of country. So please help me advice me how to crack interview. Please 🙏

[MA-rfsg]

He is just talking mumling rather than asnweer the questions lol