Z12404 Operating Systems DCS Question Paper Model : psgpolytech.ac.in
College : Psg Polytechnic College
Degree : DCS (Diploma in Computer Science)
Semester : IV
Subject : Z12404 Operating Systems
Document Type : Model Question Paper
Website : psgpolytech.ac.in
Download Model/ Sample Question Papers :https://www.pdfquestion.in/uploads/psgpolytech.ac.in/6213-Z12404.pdf
PSG Operating Systems Question Paper
PSG POLYTECHNIC COLLEGE, COIMBATORE – 641 004
DIPLOMA ODD SEMESTER EXAMINATIONS – NOV 2013
Instructions :
Related : PSG Polytechnic College Z12403 Pc Hardware & Peripherals DCS Question Paper Model : www.pdfquestion.in/6216.html
1. Group A and Group B questions should be answered in the Main Answer book.
2. Answer any TEN questions in Group A. Each question carries two marks.
3. Answer ALL questions either (a) subdivision or (b) subdivision in Group B. Each question carries 14 marks.
Group A
Z12404 Operating Systems
Time : 3 Hours Max.Marks:100
Group – A Marks : 10 x 3 = 30
1. Give the definition for an Operating System.
2. What are the common system components available
3. List any four functions of operating system.
4. What is a process- List out the components of a process.
5. What is context switching-
6. List down the types of process schedulers.
7. Define dynamic loading.
8. What is swapping-
9. Write the definition for Paging and mention any one advantage and disadvantage.
10. What is I/O buffering-
11. What are the factors of file allocation-
12. Write any four methods of file organization.
13. List down any four commands used in linux and write down its purpose.
14. What are the system components available in linux-
15. Mention any two drawbacks of linux.
Group B
Marks : 5 x 14 = 55
16. a) Explain about the system components.
(OR)
b) (i) List any five services provided by an operating system. Explain how each provides convenience to the users. (5)
(ii) Mention how system calls are categorized in an operating system and explain it elaborately. (9)
17. a) What is the process control block? Explain with neat diagram.
(OR)
b) Consider following process, with the CPU burst time given in milliseconds.
Process | Burst time | Priority
P1 10 3
P2 1 1
P3 2 3
P4 1 4
P5 5 2
Processes are arrived in P1, P2, P3 P4, P5 order of all at time 0.
(i) Draw Gantt charts to show execution using FCFS and SJF scheduling.
(ii) Calculate turnaround time for each scheduling algorithms.
(iii) What is the waiting time of each process for each one of the above scheduling algorithms?
18. a) What is address binding? Explain in detail with neat diagram representing the steps for processing user program.
(OR)
b) Explain placement algorithm with suitable example.
19. a) Explain the different types of I/O buffering.
(OR)
b) (i) Elaborate the terms used in the formula Ts= m * n + s and T = b/rN. (5)
(ii) What is the maximum size of disk which contains following parameters? (9) Cylinder= 1024, heads = 16 and sectors per track is 63.
20.a) Explain the components of linux operating system with neat diagram.
(OR)
b) Explain any six linux commands with appropriate examples.
Z12502 Microprocessor And Its Applications Model Question Paper :
1. What are tri-state devices? Why are they required in a bus oriented system?
2. How is an instruction fetched from memory?
3. Why is program counter and stack pointer 16-bit registers? Mention their uses?
4. Differentiate between compare and subtract instructions in 8085 with an example
5. The memory location 2050h holds the data byte F7H. Write instructions to transfer the data byte to the accumulator using three different opcodes: MOV, LDAX and LDA.
6. List the similarities and differences between CALL & RET and PUSH & POP instructions.
7. Give the significance of RIM and SIM instruction available in 8085?
8. Can the microprocessor differentiate whether it is reading from a memory –mapped input port or from memory? Justify your answer.
9. How hardware interrupts of 8085 are classified? Give their vector address.
10. Specify the Mode 1 output control signals of IC 8255 and brief their use.
11. List the various functions performed by the command word in IC 8279.
12. What are drivers? Why are they required in a common cathode seven-segment LED?
13. Calculate the number of steps needed to rotate one complete rotation in a stepper motor. If number of tooth in the stator is 4. Also define the motor speed.