ALTEN FEA Engineer Interview Questions and Answers

RTOS is designed for real-time applications with predictable response time, while normal OS is designed for general-purpose computing.

• RTOS provides deterministic scheduling and prioritization of tasks.

• Normal OS may have non-deterministic scheduling and may not prioritize tasks.

• RTOS has low latency and high throughput.

• Normal OS may have higher latency and lower throughput.

• RTOS is used in embedded systems, automotive sys...read more

Structure padding is the insertion of unused bytes between structure members to align them to memory boundaries.

• Padding is added to ensure that each member of the structure is aligned to a memory address that is a multiple of its size.

• Padding is added to improve performance by allowing the CPU to access data more efficiently.

• Padding can be controlled using compiler-specific directives or pragmas.

• Example: struct example...read more

Memory mapping is the process of assigning a physical address to a virtual address in a computer's memory.

• Memory mapping allows programs to access physical memory without knowing its exact location.

• It helps in efficient memory management by allowing multiple programs to share the same physical memory.

• Memory mapping is commonly used in operating systems and device drivers.

• Examples of memory mapping techniques include pa...read more

Reversing a string using C code

• Declare a character array to store the string

• Use a loop to iterate through the string and store it in the array

• Use another loop to print the array in reverse order

Socket programming is a way of connecting two nodes on a network to communicate with each other.

• It involves creating a socket object on both the client and server side.

• The client sends a request to the server through the socket.

• The server receives the request and sends a response back through the same socket.

• Common protocols used in socket programming include TCP and UDP.

• Examples of applications that use socket program...read more

3 way handshake is a process used in TCP/IP network to establish a connection between two devices.

• The client sends a SYN packet to the server

• The server responds with a SYN-ACK packet

• The client sends an ACK packet to the server to confirm the connection

• This process is used to ensure reliable communication between devices