PREVIOUS YEAR SOLVED PAPERS - November 2017 Paper 2
- Option : B
- Explanation : For access time optimization sort the files in increasing order of file size. So, option (B) is correct.
37. Which module gives control of the CPU to the process selected by the short - term schedular?
- Option : A
- Explanation : There are three type of scheduler: 1. Short-term scheduler 2. Mid-term scheduler 3. Long-term scheduler Dispatcher is responsible for handovering the control of CPU to the newly selected process by the Short-term scheduler. So, option (A) is correct.
38. Two atomic operations permissible on Semaphores are __________ and __________.
- Option : D
- Explanation : Wait and signal are the atomic operation possible on semaphore. So, (D) is the correct option.
- Option : C
- Explanation : Software doesn't wear out but as the environment changes and needs change, it becomes gradually less useful/effective and more errors. Option (C) is correct.
40. Software re-engineering is concerned with:
- A
Re-constructing the original source code from the existing machine (low - level) code program and modifying it to make it more user - friendly.
- B
Scrapping the source code of a software and re writing it entirely from scratch
- C
Re-organising and modifying existing software systems to make them more maintainable.
- D
Translating source code of an existing software to a new machine (low - level) language.
- Option : C
- Explanation : Software Re- engineering is the examination and alteration of a system to reconstitute it in a new form. In other words, Software Re- engineering is a process of software development which is done to improve the maintainability of a software system. Option (C) is correct.
