Photon Interactive Interview Questions, Process, and Tips

React, JavaScript, es6

You have to get a rady-made react application work

Q1. It was coomon question about react, redux and easy logic task
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Q1. Introduction about your self
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Q1. Sitecore cms, caching, custom domain
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Android sdk and kotlin related 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...read more
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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...read more
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Q2. 11. How to store sensible data
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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.
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Q3. 12. Explain about the Keystore file
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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...read more
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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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