Hi Friends,
Just willing to share my interview questions in company Handygo.
Hope, it will help prepare everybody for the java/android interview.
I'll also put correct answers of these questions.
Also read my other interviews:
Interview @ Handygo:
Question 1:
What are the features of Java 8 version?
Answer:
Java 8 Features:
Question 2:
How Java Streams are lazy? Explain.
Answer:
Streams in java contain ternary operations. Like count(), collect(), list() etc. So, intermediary operations on streams are not executed until ternary operation is not called. That's why streams are lazy in nature.
Question 3:
Tricky One: I have a functional interface with 3 abstract methods in it. How I'll write lambda expression for it?
Answer:
This is a tricky question. Actually interviewer wants to see the presence of mind.
Functional interfaces in Java 8 can contain only 1 abstract method. So, lambda expression will not operate on that interface, as it is not functional interface.
Question 4:
I want to send a collection to some method as parameter and want to make sure that this collection cannot be updated. How I'll do that?
Answer:
In this case, we can send unmodifiable collection as the method parameter. In Collections class, we have methods like unModifiableCollection(), unModifiableMap() , unModifiableList() etc.
Using these, we can create and send unModifiable collection as method parameter.
Question 5:
Why sewer [severage] covers are made round?
Answer:
Answer to this question is that round covers are easy to carry.
Along with that, it is very easy to put them on sewer, as no need to match the sides and corners.
Question 6:
If you need to buy BMW, how much time you require to buy it?
Answer:
My answer to this question was: It will take me entire life with extreme hardwork to buy BMW.
As buying entire BMW company is not a little task.
Interviewer was checking the thought process.
Question 7:
What is lifecycle of a thread?
Answer:
I had drawn this diagram and the answer was complete here.
Question 8:
Difference between Android 5 & 6 version?
Answer:
Question 9:
Is there any fee from play store to deploy the android app/game?
Answer:
Yes, Play store charges annual fee for deploying Android apps/games.
Question 10:
Why to choose fragments over activity?
Answer:
Fragments are reusable components. And also they have better lifecycle methods to control them.
It is very easy to write fragment and use them everywhere.
Hope these interview questions help everybody.
Thanks for reading.
Just willing to share my interview questions in company Handygo.
Hope, it will help prepare everybody for the java/android interview.
I'll also put correct answers of these questions.
Also read my other interviews:
- Interview @ Capgemini
- Java Interview @ SAP
- Java Interview @ GalaxE
- Java Interview @ OrangeMantra
- Interview @ Dew Solutions
- Interview @ BirdEye
- Interview @ Virtusa Polaris
- Interview @ RBS
- Interview @ Aricent
- Interview @ WDTS
Interview @ Handygo:
Question 1:
What are the features of Java 8 version?
Answer:
Java 8 Features:
- Functional Interfaces
- Lambda Expressions
- Streams
- New Date and Time API
- Changes in Collections API
- Changes in Map classs, HashMap, LinkedHashMap, ConcurrentHashMap
- Added StampedLock
Question 2:
How Java Streams are lazy? Explain.
Answer:
Streams in java contain ternary operations. Like count(), collect(), list() etc. So, intermediary operations on streams are not executed until ternary operation is not called. That's why streams are lazy in nature.
Question 3:
Tricky One: I have a functional interface with 3 abstract methods in it. How I'll write lambda expression for it?
Answer:
This is a tricky question. Actually interviewer wants to see the presence of mind.
Functional interfaces in Java 8 can contain only 1 abstract method. So, lambda expression will not operate on that interface, as it is not functional interface.
Question 4:
I want to send a collection to some method as parameter and want to make sure that this collection cannot be updated. How I'll do that?
Answer:
In this case, we can send unmodifiable collection as the method parameter. In Collections class, we have methods like unModifiableCollection(), unModifiableMap() , unModifiableList() etc.
Using these, we can create and send unModifiable collection as method parameter.
Question 5:
Why sewer [severage] covers are made round?
Answer:
Answer to this question is that round covers are easy to carry.
Along with that, it is very easy to put them on sewer, as no need to match the sides and corners.
Question 6:
If you need to buy BMW, how much time you require to buy it?
Answer:
My answer to this question was: It will take me entire life with extreme hardwork to buy BMW.
As buying entire BMW company is not a little task.
Interviewer was checking the thought process.
Question 7:
What is lifecycle of a thread?
Answer:
Question 8:
Difference between Android 5 & 6 version?
Answer:
- Android 5 is called Lollipop while Android 6 is called Marshmallow.
- In Android 5, Material Design was introduced while in Android 6 MIDI support and Android Pay was added.
- Multiple SIM cards support in Android 5. Permissions Dashboard in Android 6
Question 9:
Is there any fee from play store to deploy the android app/game?
Answer:
Yes, Play store charges annual fee for deploying Android apps/games.
Question 10:
Why to choose fragments over activity?
Answer:
Fragments are reusable components. And also they have better lifecycle methods to control them.
It is very easy to write fragment and use them everywhere.
Hope these interview questions help everybody.
Thanks for reading.
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