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Recent questions tagged operating-system
28
votes
3
answers
3241
GATE CSE 1993 | Question: 7.10
Assume that the following jobs are to be executed on a single processor system ... time (completion time) for job $p$ if scheduling is round robin with time slice $1$ $4$ $10$ $11$ $12$ None of the above
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
13.1k
views
gate1993
operating-system
process-scheduling
normal
23
votes
5
answers
3242
GATE CSE 1993 | Question: 7.9, UGCNET-Dec2012-III: 41
Consider a system having $m$ resources of the same type. These resources are shared by $3$ processes $A, B$, and $C$ which have peak demands of $3, 4$, and $6$ respectively. For what value of $m$ deadlock will not occur? $7$ $9$ $10$ $13$ $15$
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
26.5k
views
gate1993
operating-system
resource-allocation
normal
ugcnetcse-dec2012-paper3
multiple-selects
32
votes
2
answers
3243
GATE CSE 1993 | Question: 7.8
The root directory of a disk should be placed at a fixed address in main memory at a fixed location on the disk anywhere on the disk at a fixed location on the system disk anywhere on the system disk
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
13.2k
views
gate1993
operating-system
disk
normal
28
votes
4
answers
3244
GATE CSE 1993 | Question: 6.8
The details of an interrupt cycle are shown in figure. Given that an interrupt input arrives every $1$ msec, what is the percentage of the total time that the CPU devotes for the main program execution.
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
6.4k
views
gate1993
operating-system
interrupts
normal
descriptive
27
votes
5
answers
3245
GATE CSE 1993 | Question: 6.7
A certain moving arm disk storage, with one head, has the following specifications: Number of tracks/recording surface $= 200$ Disk rotation speed $= 2400$ rpm Track storage capacity $= 62,500$ bits The average latency of this device is $\text{P}$ ms and the data transfer rate is $\text{Q}$ bits/sec. Write the values of $\text{P}$ and $\text{Q}$.
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
20.2k
views
gate1993
operating-system
disk
normal
descriptive
50
votes
13
answers
3246
GATE CSE 1997 | Question: 6.8
Each Process $P_i, i = 1\ldots 9$ is coded as follows repeat P(mutex) {Critical section} V(mutex) forever The code for $P_{10}$ is identical except it uses V(mutex) in place of P(mutex). What is the largest number of processes that can be inside the critical section at any moment? $1$ $2$ $3$ None
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
24.7k
views
gate1997
operating-system
process-synchronization
normal
25
votes
6
answers
3247
GATE CSE 1997 | Question: 6.7
An operating system contains $3$ user processes each requiring $2$ units of resource $R$. The minimum number of units of $R$ such that no deadlocks will ever arise is $3$ $5$ $4$ $6$
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
17.5k
views
gate1997
operating-system
resource-allocation
normal
34
votes
3
answers
3248
GATE CSE 1997 | Question: 3.10, ISRO2008-57, ISRO2015-64
Dirty bit for a page in a page table helps avoid unnecessary writes on a paging device helps maintain LRU information allows only read on a page None of the above
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
11.0k
views
gate1997
operating-system
paging
easy
isro2008
isro2015
32
votes
4
answers
3249
GATE CSE 1997 | Question: 3.9
Thrashing reduces page I/O decreases the degree of multiprogramming implies excessive page I/O improve the system performance
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
13.2k
views
gate1997
operating-system
page-replacement
easy
48
votes
4
answers
3250
GATE CSE 1997 | Question: 3.8
When an interrupt occurs, an operating system ignores the interrupt always changes state of interrupted process after processing the interrupt always resumes execution of interrupted process after processing the interrupt may change state of interrupted process to ‘blocked’ and schedule another process.
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
13.8k
views
gate1997
operating-system
interrupts
normal
32
votes
2
answers
3251
GATE CSE 1997 | Question: 3.7
I/O redirection implies changing the name of a file can be employed to use an existing file as input file for a program implies connecting $2$ programs through a pipe None of the above
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
8.6k
views
gate1997
operating-system
normal
inter-process-communication
24
votes
3
answers
3252
GATE CSE 1997 | Question: 3.6
The correct matching for the following pairs is: ... $\text{A-4 B-3 C-2 D-1}$ $\text{A-2 B-4 C-1 D-3}$ $\text{A-3 B-4 C-3 D-2}$
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
5.7k
views
gate1997
operating-system
normal
disk-scheduling
match-the-following
25
votes
2
answers
3253
GATE CSE 1997 | Question: 3.5
Locality of reference implies that the page reference being made by a process will always be to the page used in the previous page reference is likely to be to one of the pages used in the last few page references will always be to one of the pages existing in memory will always lead to a page fault
Kathleen
asked
in
Operating System
Sep 29, 2014
by
Kathleen
9.4k
views
gate1997
operating-system
page-replacement
easy
41
votes
2
answers
3254
GATE CSE 2010 | Question: 25
Which of the following statements are true? Shortest remaining time first scheduling may cause starvation Preemptive scheduling may cause starvation Round robin is better than FCFS in terms of response time I only I and III only II and III only I, II and III
go_editor
asked
in
Operating System
Sep 29, 2014
by
go_editor
20.5k
views
gatecse-2010
operating-system
process-scheduling
easy
23
votes
2
answers
3255
GATE CSE 2010 | Question: 24
A system uses FIFO policy for system replacement. It has $4$ page frames with no pages loaded to begin with. The system first accesses $100$ distinct pages in some order and then accesses the same $100$ pages but now in the reverse order. How many page faults will occur? $196$ $192$ $197$ $195$
go_editor
asked
in
Operating System
Sep 29, 2014
by
go_editor
12.1k
views
gatecse-2010
operating-system
page-replacement
normal
45
votes
5
answers
3256
GATE CSE 2010 | Question: 23
Consider the methods used by processes $P1$ and $P2$ for accessing their critical sections whenever needed, as given below. The initial values of shared boolean variables $S1$ and $S2$ ... ? Mutual exclusion but not progress Progress but not mutual exclusion Neither mutual exclusion nor progress Both mutual exclusion and progress
go_editor
asked
in
Operating System
Sep 29, 2014
by
go_editor
17.7k
views
gatecse-2010
operating-system
process-synchronization
normal
23
votes
3
answers
3257
GATE CSE 2012 | Question: 42
Consider the virtual page reference string $\text{1, 2, 3, 2, 4, 1, 3, 2, 4, 1}$ on a demand paged virtual memory system running on a computer system that has main memory size of $3$ page frames which are initially empty. Let $\text{LRU}$, $\text{FIFO}$ ... $\text{OPTIMAL} < \text{FIFO} < \text{LRU}$ $\text{OPTIMAL} = \text{LRU}$ $\text{OPTIMAL} = \text{FIFO}$
Arjun
asked
in
Operating System
Sep 29, 2014
by
Arjun
10.2k
views
gatecse-2012
operating-system
page-replacement
normal
45
votes
2
answers
3258
GATE CSE 2012 | Question: 41
A file system with $300$ GByte disk uses a file descriptor with $8$ direct block addresses, $1$ indirect block address and $1$ doubly indirect block address. The size of each disk block is $128$ Bytes and the size of each disk block address is $8$ Bytes. ... file size in this file system is $3$ KBytes $35$ KBytes $280$ KBytes dependent on the size of the disk
Arjun
asked
in
Operating System
Sep 29, 2014
by
Arjun
20.7k
views
gatecse-2012
operating-system
disk
normal
40
votes
1
answer
3259
GATE CSE 2011 | Question: 44
An application loads $100$ libraries at startup. Loading each library requires exactly one disk access. The seek time of the disk to a random location is given as $10$ ms. Rotational speed of disk is $6000$ rpm. If all $100$ libraries are loaded from random locations on the disk, how ... start of the block may be neglected.) $0.50 \ s$ $1.50 \ s$ $1.25 \ s$ $1.00 \ s$
go_editor
asked
in
Operating System
Sep 29, 2014
by
go_editor
13.2k
views
gatecse-2011
operating-system
disk
normal
29
votes
1
answer
3260
GATE CSE 2011 | Question: 35
Consider the following table of arrival time and burst time for three processes $P0, P1$ and $P2.$ ... of processes. What is the average waiting time for the three processes? $5.0$ ms $4.33$ ms $6.33$ ms $7.33$ ms
go_editor
asked
in
Operating System
Sep 29, 2014
by
go_editor
12.6k
views
gatecse-2011
operating-system
process-scheduling
normal
41
votes
4
answers
3261
GATE CSE 2011 | Question: 20, UGCNET-June2013-II: 48
Let the page fault service time be $10$ milliseconds(ms) in a computer with average memory access time being $20$ nanoseconds (ns). If one page fault is generated every $10^6$ memory accesses, what is the effective access time for memory? $21$ ns $30$ ns $23$ ns $35$ ns
go_editor
asked
in
Operating System
Sep 29, 2014
by
go_editor
26.6k
views
gatecse-2011
operating-system
virtual-memory
normal
ugcnetcse-june2013-paper2
54
votes
3
answers
3262
GATE CSE 2011 | Question: 16, UGCNET-June2013-III: 65
A thread is usually defined as a light weight process because an Operating System (OS) maintains smaller data structure for a thread than for a process. In relation to this, which of the following statement is correct? OS ... thread OS does not maintain virtual memory state for each thread OS does not maintain a separate stack for each thread
go_editor
asked
in
Operating System
Sep 29, 2014
by
go_editor
17.2k
views
gatecse-2011
operating-system
threads
normal
ugcnetcse-june2013-paper3
19
votes
1
answer
3263
GATE CSE 2011 | Question: 11
A computer handles several interrupt sources of which of the following are relevant for this question. Interrupt from CPU temperature sensor (raises interrupt if CPU temperature is too high) Interrupt from Mouse (raises Interrupt if the ... the HIGHEST priority? Interrupt from Hard Disk Interrupt from Mouse Interrupt from Keyboard Interrupt from CPU temperature sensor
go_editor
asked
in
Operating System
Sep 29, 2014
by
go_editor
9.5k
views
gatecse-2011
operating-system
interrupts
normal
75
votes
5
answers
3264
GATE CSE 2011 | Question: 6, UGCNET-June2013-III: 62
Let the time taken to switch from user mode to kernel mode of execution be $T1$ while time taken to switch between two user processes be $T2$. Which of the following is correct? $T1 > T2$ $T1 = T2$ $T1 < T2$ Nothing can be said about the relation between $T1$ and $T2$
go_editor
asked
in
Operating System
Sep 29, 2014
by
go_editor
25.8k
views
gatecse-2011
operating-system
context-switch
easy
ugcnetcse-june2013-paper3
38
votes
3
answers
3265
GATE CSE 2014 Set 3 | Question: 33
Consider a paging hardware with a $TLB$. Assume that the entire page table and all the pages are in the physical memory. It takes $10$ milliseconds to search the $TLB$ and $80$ milliseconds to access the physical memory. If the $TLB$ hit ratio is $0.6$, the effective memory access time (in milliseconds) is _________.
go_editor
asked
in
Operating System
Sep 28, 2014
by
go_editor
15.8k
views
gatecse-2014-set3
operating-system
virtual-memory
numerical-answers
normal
24
votes
3
answers
3266
GATE CSE 2014 Set 3 | Question: 32
An operating system uses shortest remaining time first scheduling algorithm for pre-emptive scheduling of processes. Consider the following set of processes with their arrival times and CPU burst times (in milliseconds): ... The average waiting time (in milliseconds) of the processes is ______.
go_editor
asked
in
Operating System
Sep 28, 2014
by
go_editor
9.1k
views
gatecse-2014-set3
operating-system
process-scheduling
numerical-answers
normal
22
votes
5
answers
3267
GATE CSE 2014 Set 3 | Question: 31
A system contains three programs and each requires three tape units for its operation. The minimum number of tape units which the system must have such that deadlocks never arise is _________.
go_editor
asked
in
Operating System
Sep 28, 2014
by
go_editor
13.6k
views
gatecse-2014-set3
operating-system
resource-allocation
numerical-answers
easy
18
votes
2
answers
3268
GATE CSE 2014 Set 3 | Question: 20
A system uses $3$ page frames for storing process pages in main memory. It uses the Least Recently Used (LRU) page replacement policy. Assume that all the page frames are initially empty. What is the total number of page faults that will occur while processing the page reference string given below? $\text{4, 7, 6, 1, 7, 6, 1, 2, 7, 2}$
go_editor
asked
in
Operating System
Sep 28, 2014
by
go_editor
8.2k
views
gatecse-2014-set3
operating-system
page-replacement
numerical-answers
normal
72
votes
6
answers
3269
GATE CSE 2014 Set 2 | Question: 55
Consider the main memory system that consists of $8$ memory modules attached to the system bus, which is one word wide. When a write request is made, the bus is occupied for $100$ nanoseconds (ns) by the data, address, and control signals. ... bus at any time. The maximum number of stores (of one word each) that can be initiated in $1$ millisecond is ________
go_editor
asked
in
Operating System
Sep 28, 2014
by
go_editor
26.9k
views
gatecse-2014-set2
operating-system
memory-management
numerical-answers
normal
76
votes
10
answers
3270
GATE CSE 2014 Set 2 | Question: 33
A computer has twenty physical page frames which contain pages numbered $101$ through $120$. Now a program accesses the pages numbered $\text{1, 2, ..., 100}$ in that order, and repeats the access sequence THRICE. Which one of ... as the optimal page replacement policy for this program? Least-recently-used First-in-first-out Last-in-first-out Most-recently-used
go_editor
asked
in
Operating System
Sep 28, 2014
by
go_editor
28.6k
views
gatecse-2014-set2
operating-system
page-replacement
ambiguous
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