Samsung Interview Questions, Process, and Tips

Q1. Java basic coding
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Q1. Behavioral questions
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Q1. A scenario to create a new Android service
Ans. 
Creating a new Android service
• Define a class that extends Service class

• Override onStartCommand() method to handle service logic

• Register the service in AndroidManifest.xml file
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Q2. 2 puzzles. one was to find min no of weighs to find faulty item among 8 items and the other one was to min no of races required to find top three horses among 25 horses
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Q3. How to manage gralloc buffers
Ans. 
Managing gralloc buffers involves allocating, locking, and freeing memory for graphics rendering in Android.
• Allocate gralloc buffer using gralloc_alloc() function

• Lock buffer for reading or writing using gralloc_lock() function

• Free buffer using gralloc_free() function

• Example: gralloc_alloc(usage, width, height, format, &handle)

• Example: gralloc_lock(handle, usage, left, top, width, height, &vaddr)
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Q4. What is HIDL vs AIDL
Ans. 
HIDL stands for Hardware Interface Definition Language and is used for communication between HAL and framework. AIDL stands for Android Interface Definition Language and is used for inter-process communication in Android.
• HIDL is used for communication between Hardware Abstraction Layer (HAL) and framework in Android

• AIDL is used for inter-process communication in Android

• HIDL is more efficient and faster than AIDL
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Q5. How Android buffers are passed from application to drivers.
Ans. 
Android buffers are passed from application to drivers through shared memory and buffer queues.
• Android applications communicate with drivers through the HAL (Hardware Abstraction Layer)

• Buffers are typically passed using shared memory regions

• Buffer queues are used to manage the flow of data between application and driver

• Example: Camera application passing image data to camera driver for processing
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Q6. What happens if LINUX faces a hardware interrupt
Ans. 
When LINUX faces a hardware interrupt, it stops executing the current code and jumps to a specific interrupt handler.
• LINUX stops executing the current code and jumps to a specific interrupt handler

• The interrupt handler processes the interrupt and resumes normal execution afterwards

• Different hardware interrupts are handled by different interrupt handlers
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Q7. What is the challenge while creating multiple services in Android
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The challenge while creating multiple services in Android is managing communication between services and ensuring proper synchronization.
• Managing communication between services can be complex and error-prone.

• Ensuring proper synchronization between services to avoid race conditions and data inconsistencies.

• Handling dependencies between services and coordinating their interactions.

• Testing and debugging multiple services ...read more
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Q8. Boot up Android sequence
Ans. 
The Android boot up sequence involves several stages including power on, bootloader, kernel initialization, system server startup, and app launch.
• Power on the device

• Bootloader loads the Android OS kernel

• Kernel initializes the system and drivers

• System server starts up and launches essential services

• Apps are launched and user interface becomes accessible
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Q9. Describe about Permission files/SE Linux policy
Ans. 
Permission files/SE Linux policy control access to resources based on rules set by administrators.
• Permission files define who can access a file or directory and what actions they can perform.

• SE Linux policy is a security mechanism that enforces rules on how processes interact with resources.

• SE Linux policy is based on labels assigned to processes and resources, determining access permissions.

• SE Linux policy can be cust...read more
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Q10. What is manifestation file and how is it used?
Ans. 
A manifestation file is a configuration file used to define the properties and settings of a software application.
• Manifestation files typically include information such as the application's name, version, dependencies, and permissions.

• They are commonly used in software development to ensure that the application runs correctly and has access to necessary resources.

• Examples of manifestation files include AndroidManifest....read more
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Q1. Course schedule 1 in leetcode
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Q2. Snakes and ladder in leetcode
Ans. 
Implement the game of Snakes and Ladders on LeetCode.
• Use a 1D array to represent the board of the game.

• Use a queue to perform BFS to find the shortest path to reach the end.

• Handle the special cases of snakes and ladders by updating the position accordingly.
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Q1. How to call an interface signal at sequence level in uvm?
Ans. 
Interface signals can be called at sequence level in UVM using the uvm_config_db class.
• Use uvm_config_db#(type)::set/get methods to access interface signals at sequence level

• Register the interface signal in the configuration database before accessing it in the sequence

• Example: uvm_config_db#(virtual interface)::set(null, "my_sequence", "my_interface", my_interface)
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10m aptitude and image questions

50m DSA, cp CPP AND leetcode proper hard

DS questions difficult level

BFS, DFS questions with difficult level

Q1. Are you comfortable shifting to noida
Ans. 
Yes, I am comfortable shifting to Noida for the job.
• I am open to new opportunities and challenges in Noida.

• I have researched about the location and am willing to relocate.

• I have family or support system in Noida to help with the transition.
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Q2. Basic family questions
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