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DMA stands for Direct Memory Access, a feature that allows hardware devices to transfer data to/from memory without involving the CPU.
DMA is used to offload data transfer tasks from the CPU, improving overall system performance.
Context switching is the process of saving and restoring the state of a CPU so that multiple processes can share the same CPU.
DMA and context switching are both important concepts in embedded sy...
Pipeline in ARM is a technique used to increase the performance of the processor by overlapping the execution of multiple instructions.
Pipeline allows multiple instructions to be processed simultaneously in different stages of execution.
It helps in reducing the overall execution time of a program.
ARM processors typically have a 3-stage pipeline, but some newer designs have more stages for better performance.
Example: In...
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I applied via Naukri.com and was interviewed before Mar 2020. There were 4 interview rounds.
Hashtable is synchronized while hashmap is not.
Hashtable is thread-safe while hashmap is not.
Hashtable does not allow null keys or values while hashmap allows one null key and multiple null values.
Hashtable is slower than hashmap due to synchronization.
Hashtable is a legacy class while hashmap is a newer implementation.
Hashmap is not thread-safe while Concurrent Hashmap is thread-safe.
Hashmap is not suitable for multi-threaded environments as it can lead to race conditions and data inconsistencies.
Concurrent Hashmap allows multiple threads to access and modify the map concurrently without any data inconsistencies.
Concurrent Hashmap uses a technique called lock striping to achieve thread-safety.
Concurrent Hashmap is slower than Hashma...
I applied via Campus Placement and was interviewed in May 2021. There was 1 interview round.
I applied via Naukri.com and was interviewed before Apr 2021. There was 1 interview round.
I applied via Naukri.com and was interviewed in Dec 2020. There were 3 interview rounds.
posted on 20 Jun 2021
I applied via Campus Placement and was interviewed in May 2021. There was 1 interview round.
I applied via Naukri.com and was interviewed in Jan 2021. There were 3 interview rounds.
I applied via Recruitment Consultant and was interviewed in Oct 2020. There were 6 interview rounds.
I applied via Naukri.com and was interviewed before May 2018. There were 5 interview rounds.
based on 1 interview
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