System Software and Operating System – Previous Year Questions
336 questions from past UGC NET Paper 2 – Computer Science papers, each with the correct answer. Open any question for its explanation.
- Which UNIX/Linux command is used to make all files and sub-directories in the directory “progs” executable by all users ?
- Which of the following statements are true ? (a) External Fragmentation exists when there is enough total memory space to satisfy a request but the available space is contiguous. (b) Memory Fragmentation can be internal…
- Page information in memory is also called as Page Table. The essential contents in each entry of a page table is/are _________.
- Consider a virtual page reference string 1, 2, 3, 2, 4, 2, 5, 2, 3, 4. Suppose LRU page replacement algorithm is implemented with 3 page frames in main memory. Then the number of page faults are_________.
- Consider the following three processes, with arrival time and CPU burst time in milliseconds: P1 (arrival 0, burst 7), P2 (arrival 1, burst 4), P3 (arrival 2, burst 8). The Gantt chart for the preemptive SJF scheduling…
- In which of the following scheduling criteria, context switching will never take place?