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Photon Interactive Senior Android Application Developer Interview Questions, Process, and Tips
Photon Interactive Senior Android Application Developer Interview Experiences
1 interview found
I applied via Naukri.com and was interviewed in Jan 2023. There were 3 interview rounds.
Android sdk and kotlin related questions
(4 Questions)
- Q1. 1. Activity and fragment life cycle 2. Communicate between parents fragment to child fragment 3. Broadcasting receiver 4. How to implement MVVM design pattern for login page 5. Modifier in kotlin 6. Abstra...
- Ans.
The interview questions cover various topics related to Android development, including activity and fragment life cycle, communication between fragments, MVVM design pattern, Kotlin modifiers, abstract vs interface, coroutines, background services, and Room database implementation.
Understand the life cycle of activities and fragments in Android development
Use communication techniques like interfaces or shared view mode...
- Q2. 11. How to store sensible data
- Ans.
Sensitive data should be stored securely using encryption and secure storage mechanisms.
Use encryption algorithms like AES to encrypt sensitive data before storing it in the database.
Store encryption keys securely, separate from the data they encrypt.
Implement secure storage mechanisms like Android Keystore to protect sensitive data.
Avoid storing sensitive data in plain text or easily accessible formats.
- Q3. 12. Explain about the Keystore file
- Ans.
Keystore file is a secure container used to store cryptographic keys and certificates for Android applications.
Keystore file is used to securely store private keys, public keys, and certificates used for encryption and authentication in Android applications.
It helps in protecting sensitive information such as passwords, API keys, and other credentials.
Keystore file can be generated using keytool command-line utility or...
- Q4. 13. Write reverse string program in kotlin 14. Safe call and null check operator
- Ans.
Reverse a string and demonstrate safe call and null check operator in Kotlin
To reverse a string in Kotlin, you can use the built-in extension function 'reversed()'
Safe call operator '?' is used to safely access properties of nullable objects without causing NullPointerException
Null check operator '!!' is used to explicitly throw a NullPointerException if a nullable object is null
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I applied via Recruitment Consulltant and was interviewed before Jul 2021. There were 2 interview rounds.
(2 Questions)
- Q1. Core java, spring boot, sql, java8
- Q2. Basic concept of java
(1 Question)
- Q1. What is your Salary expectation
Interview Preparation Tips
Senior Software Developer Interview Questions & Answers
Bounteous x Accolite
Anonymous
posted on 7 Jul 2020
I applied via Referral and was interviewed in Jun 2020. There were 3 interview rounds.
Interview Questionnaire
5 Questions
- Q1. Find the maximum for each and every contiguous subarray of size k from an arr of size n.
- Ans.
Find maximum for each contiguous subarray of size k from an array of size n.
Iterate through the array and keep track of maximum for each subarray of size k
Use a sliding window approach to efficiently calculate maximum for each subarray
Time complexity: O(n)
Example: arr = [10, 5, 2, 7, 1, 9, 4], k = 3, output = [10, 7, 7, 9, 9]
- Q2. Find all the permutations of the string.
- Ans.
Permutations of a string
Use recursion to swap characters and generate permutations
Iterate through the string and swap each character with the first character
Repeat the above step for each character in the string
- Q3. Left View of a Binary Tree.
- Ans.
Left view of a binary tree
The left view of a binary tree shows the leftmost node at each level
We can traverse the tree in a pre-order fashion and keep track of the current level
If the current level is greater than the maximum level seen so far, add the node to the result
- Q4. Segregate an array containing 0 and 1 with minimum number of swaps.
- Ans.
Segregate an array of 0s and 1s with minimum swaps.
Count the number of 0s in the array.
Swap the 1s with the 0s until all 0s are on one side and 1s on the other.
The minimum number of swaps required is half the number of 1s on the side with fewer 1s.
- Q5. More questions from CV (about project and framwork link springboot mentioned in cv) and collections (question on map and comparable and comparator), multithreading (consumer producer for odd even number)
Interview Preparation Tips
Skills evaluated in this interview
Interview Questionnaire
4 Questions
- Q1. Java Basics
- Q2. Hashmap Working
- Ans.
Hashmap is a data structure that stores key-value pairs and provides fast access to values based on their keys.
Hashmap uses a hash function to map keys to indices in an array.
Collisions can occur when multiple keys map to the same index, which can be resolved using techniques like chaining or open addressing.
Hashmap provides constant time complexity for insertion, deletion, and retrieval of values.
Example: HashMap<S...
- Q3. Spring Boot, Microservices, Circuit Breaker
- Q4. SQL-> 3rd Highest Salary
- Ans.
To find the 3rd highest salary in SQL, we can use the 'LIMIT' and 'OFFSET' keywords.
Use 'ORDER BY' to sort the salaries in descending order
Use 'LIMIT 1 OFFSET 2' to select the 3rd highest salary
Example: SELECT salary FROM employees ORDER BY salary DESC LIMIT 1 OFFSET 2
Skills evaluated in this interview
Selected
I applied via Walk-in and was interviewed in Feb 2024. There were 2 interview rounds.
(2 Questions)
- Q1. Questions related to basics of Kotlin
- Q2. Questions related to basics of Android
(1 Question)
- Q1. Salary negotiation
Interview Preparation Tips
I applied via Approached by Company and was interviewed in May 2024. There were 2 interview rounds.
MC- Android Java related Questions
(1 Question)
- Q1. Kotlin coroutine related, Comparison of Architecture
Selected
I applied via Naukri.com and was interviewed before Apr 2023. There was 1 interview round.
(2 Questions)
- Q1. JAVA 8 new features spring framework
- Q2. What is marker interface why we use
- Ans.
Marker interface is an empty interface used to mark classes for special treatment.
Marker interface has no methods or fields, it is used to provide metadata about the class.
It is used by frameworks or APIs to identify classes that implement the interface.
Examples include Serializable interface in Java, which marks classes as serializable.
Skills evaluated in this interview
Hello tell me about yourself
Selected
I applied via Approached by Company and was interviewed before Oct 2022. There were 4 interview rounds.
(2 Questions)
- Q1. 1 round consist base of development like OOPS, Basic Concept of solid, Design Pattern, Database, AZURE/AWS, Testing Frameworks, ORM etc.
- Q2. What is Oops in c#?
- Ans.
Object-Oriented Programming concepts in C#
Oops stands for Object-Oriented Programming.
It includes concepts like classes, objects, inheritance, polymorphism, encapsulation.
Example: Creating a class 'Car' with properties like 'make', 'model' and methods like 'drive'.
(1 Question)
- Q1. More discussion on basic topic along with some advance area like architecture, security, performance,
(1 Question)
- Q1. Mostly want to know how you are fit with there culture, more focus on personality.
Interview Preparation Tips
Skills evaluated in this interview
Rodrigo Fogaça
(2 Questions)
- Q1. What is high order function?
- Ans.
A high order function is a function that can take other functions as parameters or return functions as results.
High order functions can be used to create more flexible and reusable code.
They allow for functions to be passed as arguments, making code more modular.
Examples include map, filter, and reduce functions in functional programming.
- Q2. What is most efficient layout to use on android
- Ans.
ConstraintLayout is the most efficient layout to use on Android.
Allows for flat view hierarchy
Handles complex layouts efficiently
Supports responsive design
Provides tools for optimizing layouts
Skills evaluated in this interview
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