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Best Questions for Embedded Programmers


Best Questions for Embedded Programmers


1. What are static variables?
2. What are volatile variables?
3. What do you mean by const keyword ?
4. What is interrupt latency?
5. How you can optimize it?
6. What is size of character, integer, integer pointer, character pointer?
7. What is NULL pointer and what is its use?
8. What is void pointer and what is its use?
9. What is ISR?
10.What is return type of ISR?
11.Can we use any function inside ISR?
12.Can we use printf inside ISR?
13.Can we put breakpoint inside ISR?
14.How to decide whether given processor is using little endian format or big endian format ?
15.What is Top half & bottom half of a kernel?
16.Difference between RISC and CISC processor.
17.What is RTOS?
18.What is the difference between hard real-time and soft real-time OS?
19.What type of scheduling is there in RTOS?
20.What is priority inversion?
21.What is priority inheritance?
22.How many types of IPC mechanism you know?
23.What is semaphore?
24.What is spin lock?
25.What is difference between binary semaphore and mutex?
26.What is virtual memory?
27.What is kernel paging?
28.Can structures be passed to the functions by value?
29.Why cannot arrays be passed by values to functions?
30.Advantages and disadvantages of using macro and inline functions?
31.What happens when recursion functions are declared inline?
32.#define cat(x,y) x##y concatenates x to y. But cat(cat(1,2),3) does not expand but gives
preprocessor warning. Why?
33.Can you have constant volatile variable? Yes, you can have a volatile pointer?
34.++*ip increments what? it increments what ip points to
35.Operations involving unsigned and signed unsigned will be converted to signed
36.malloc(sizeof(0)) will return valid pointer
37.main() {fork();fork();fork();printf("hello world"); } will print 8 times.
38.Array of pts to functions void (*fptr[10])()
39.Which way of writing infinite loops is more efficient than others? there are 3ways.

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