3i Infotech Placement: Sample Questions 422 - 424 of 1245
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Question 423
Explanation
- Page fault handler is one of critical parts of code in the linux kernel.
- It has major influence on memory subsystem՚s performance.
- Each process is assigned to a memory chunk named as pages.
- A process has a page table containing page table entries that point to the memory assigned to the process. They communicate to the CPU, the memory locations which valid for the process.
- A page table that does not currently map to RAM, will result in page fault by CPU.
Two types of page fault:
Validity fault
- Validity fault is the result of non setting of valid bits in main memory at the time of refererring a page.
Protection fault
- Provides protection mechanism in response to access violation caused by running code.
Question 424
Question MCQ▾
Is it possible to open a cursor which is in a Package in another procedure?
Choices
Choice (4) | |
---|---|
a. | Yes |
b. | No |
c. | None of the above |
d. | All of the above |
Answer
a.Explanation
- Yes, it is possible to open a cursor, which is in a Package in another procedure. Cursor:
- Declared in a package specification- is global and can be accessed by other procedures or procedures in a package.
- Declared in a procedure- is local to the procedure that cannot be accessed by other procedures.
- Is declared in the declaration part.
- Declaration section cannot assign the value to variable.