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- Question
What is a Safe State and what is its use in deadlock avoidance?
- Correct Answer
- When a process requests an available resource, system must decide if immediate allocation leaves the system in a safe state System is in safe state if there exists a safe sequence of all processes Deadlock Avoidance : ensure that a system will never enter an unsafe state
- 1. What are various scheduling queues? Discuss
- 2. What is the state of the processor, when a process is waiting for some event to occur? Discuss
- 3. What is Memory-Management Unit (MMU)? Discuss
- 4. SNOBOL is mainly used for
Options- A. Text Operation
- B. String operations
- C. List operations
- D. Numerical operations Discuss
- 5. Convert the expression ((A + B) * C ? (D ? E) ^ (F + G)) to equivalent Prefix Notation Discuss
- 6. What would be the output of the following program? main() { char a[] = "Visual C++"; char *b = "Visual C++"; printf ("\n%d %d", sizeof (a), sizeof (b)); printf ("\n%d %d", sizeof (*a), sizeof (*b)); } Discuss
- 7. Point out the error, if any, in the following program. #include "stdarg.h" main() { display ( 4, 12.5, 13.5, 14.5, 44.3); } display(int num, ...) { float c; int j; va_list ptr; va_start (ptr, num); for ( j = 1; j <= num; j++) { c = va_arg ( ptr, float ); printf ("\n%f", c); } } Discuss
- 8. Two main measures for the efficiency of an algorithm are
Options- A. Time and Space
- B. Complexity and Memory
- C. Data and Space
- D. Memory and Processor Discuss
- 9. Would the following program compile? main() { int a = 10, *j; void *k; J = k = &a; J++; k++; printf ("\n%u %u", j, k); } Discuss
- 10. What would be the output of the following program? main() { char ch ='A'; printf ("%d%d", sizeof (ch), sizeof ('A')); } Discuss
More questions
Correct Answer: Job queue Ready queue Device queue
Correct Answer: Waiting state
Correct Answer: Hardware device that maps virtual to physical address In MMU scheme, the value in the relocation register is added to every address generated by a user process at the time it is sent to memory ->The user program deals with logical addresses; it never sees the real physical addresses
Correct Answer: String operations
Explanation:
SNOBOL is a high-level computer programming language used especially in manipulating textual data. It is mainly used for string operations and was developed between 1962 and 1967.
Correct Answer: Prefix Notation: ^ - * +ABC - DE + FG
Correct Answer: 11 2 1 1
Correct Answer: While extracting a float argument using va_arg we should have useed c = va_arg (ptr, double)
Correct Answer: Time and Space
Explanation:
Two main measures for the efficiency of an algorithm are Time and Space.
Correct Answer: An error would be reported in the statement k++ since arithmetic on void pointers is not permitted unless the void pointer is appropriately typecasted
Correct Answer: 1 2
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