Operating System Structure Questions and Answers

Q: Windows uses a HANDLE, which is simply a 32 bit number that refers to an object. Which amongst the following are windows HANDLES ?(1) HDC(2) HBRUSH(3) HMENU(4) HWND

All four are Windows handles: (1), (2), (3) and (4).In the Windows API a handle is an opaque value that identifies an object managed by the system. HDC is a handle to a device context, HBRUSH to a GDI brush, HMENU to a menu and HWND to a window. All four are handle types defined in the Windows headers.Any option that leaves out HBRUSH or HMENU (options A, B and C) is incomplete.

Q: In Windows operating system, terminal services refer to support for ......................... .

Terminal Services support multiple interactive user sessions on a single system.Windows Terminal Services, renamed Remote Desktop Services in Windows Server 2008 R2, lets several users log on to the same Windows server at once, each in an independent session with its own desktop and applications, usually over the Remote Desktop Protocol from another computer.The name refers to terminals (client machines), not to terminating anything, so ending sessions and shutting down are wrong. Managing display devices is the job of device drivers and display settings.

Q: C : Computer SystemT : Dumb TerminalThe given diagram most appropriately represents which of the following scenario ?

The diagram represents a Centralized system.All the processing is done by one computer system, C, and the dumb terminals, T, have no processing power of their own. They only send keystrokes to the central computer and display what it returns. A single computer serving many terminals is the classic centralized (time-sharing mainframe) arrangement.A distributed system would need several computers, each with its own processing, cooperating over a network. Local-access and remote-access describe how a user reaches a computer, not the architecture shown, in which everything depends on the one central system.

Q: What is the most appropriate purpose of 'kill' command in Linux ?

The kill command is used to Send a signal to a process.Despite its name, kill sends any signal to a process: by default SIGTERM, asking it to terminate, but also SIGKILL, SIGSTOP, SIGCONT, SIGHUP and others, for example kill -HUP 1234 to make a daemon reload its configuration.Terminating a process is only one common use, which is why 'Kill a running process' is less appropriate. Ending a login session or shutting the system down is done with other commands.

Q: Windows operating system follows ............... and Linux operating system follows ............. type of kernel architecture.Select most appropriate option from the following :

Windows uses a Hybrid kernel and Linux a Monolithic kernel.The Windows NT kernel combines microkernel ideas (a small executive, subsystems and message passing) with many services running in kernel mode for speed, so it is classed as hybrid. Linux runs the whole kernel, including drivers, file systems and networking, in a single kernel address space, which is the monolithic design, extended with loadable modules.Linux is not a microkernel (Linus Torvalds famously debated that with Andrew Tanenbaum), so options pairing it with 'Micro' are wrong, and Windows is not purely monolithic.

Q: An operating system (OS) crashes on the average once in 30 days, that is , the Mean Time Between Failures (MTBF) = 30 days. When this happens, it takes 10 minutes to recover the OS, that is, the Mean Time To Repair (MTTR) = 10 minutes. The availability of the OS with these reliability figures is approximately :

The availability is approximately 99.97%.Availability is the fraction of time the system is up:\[ \begin{aligned} A &= \frac{MTBF}{MTBF + MTTR} \\ &= \frac{43200}{43200 + 10} \\ &= 0.99977 \approx 99.97\% \end{aligned} \]Here 30 days = 30 × 24 × 60 = 43,200 minutes, so both times are in minutes. The other options are far too low: 96.97% would mean about 22 hours of downtime a month, not 10 minutes.

11.

Windows uses a HANDLE, which is simply a 32 bit number that refers to an object. Which amongst the following are windows HANDLES ?

(1) HDC
(2) HBRUSH
(3) HMENU
(4) HWND

A.(1), (2) and (4)
B.(1), (3) and (4)
C.(1) and (4)
D.(1), (2), (3) and (4)

Exam Year(s)

MH SET - 2018, SET Exam - 2018,

Answer: D

All four are Windows handles: (1), (2), (3) and (4).

In the Windows API a handle is an opaque value that identifies an object managed by the system. HDC is a handle to a device context, HBRUSH to a GDI brush, HMENU to a menu and HWND to a window. All four are handle types defined in the Windows headers.

Any option that leaves out HBRUSH or HMENU (options A, B and C) is incomplete.

Discuss in Forum

12.

In Windows operating system, terminal services refer to support for ......................... .

A.Terminating user sessions on a system
B.Management of display devices
C.Shut down the operating system
D.Multiple interactive user sessions on a single system

Exam Year(s)

MH SET - 2019, SET Exam - 2019,

Answer: D

Terminal Services support multiple interactive user sessions on a single system.

Windows Terminal Services, renamed Remote Desktop Services in Windows Server 2008 R2, lets several users log on to the same Windows server at once, each in an independent session with its own desktop and applications, usually over the Remote Desktop Protocol from another computer.

The name refers to terminals (client machines), not to terminating anything, so ending sessions and shutting down are wrong. Managing display devices is the job of device drivers and display settings.

Discuss in Forum

13.

A square marked C in the centre joined by a separate line to each of four circles marked T, above, below, left and right of it

C : Computer System
T : Dumb Terminal

The given diagram most appropriately represents which of the following scenario ?

A.Centralized system
B.Local-access system
C.Distributed system
D.Remote-access system

Exam Year(s)

MH SET - 2019, SET Exam - 2019,

Answer: A

The diagram represents a Centralized system.

All the processing is done by one computer system, C, and the dumb terminals, T, have no processing power of their own. They only send keystrokes to the central computer and display what it returns. A single computer serving many terminals is the classic centralized (time-sharing mainframe) arrangement.

A distributed system would need several computers, each with its own processing, cooperating over a network. Local-access and remote-access describe how a user reaches a computer, not the architecture shown, in which everything depends on the one central system.

Discuss in Forum

14.

What is the most appropriate purpose of 'kill' command in Linux ?

A.Kill a running process
B.Send a signal to a process
C.Abort a user login
D.Shutdown the operating system

Exam Year(s)

MH SET - 2020, SET Exam - 2020,

Answer: B

The kill command is used to Send a signal to a process.

Despite its name, kill sends any signal to a process: by default SIGTERM, asking it to terminate, but also SIGKILL, SIGSTOP, SIGCONT, SIGHUP and others, for example kill -HUP 1234 to make a daemon reload its configuration.

Terminating a process is only one common use, which is why 'Kill a running process' is less appropriate. Ending a login session or shutting the system down is done with other commands.

Discuss in Forum

15.

Windows operating system follows ............... and Linux operating system follows ............. type of kernel architecture.

Select most appropriate option from the following :

A.Monolithic, Micro
B.Hybrid, Monolithic
C.Micro, Monolithic
D.Micro, Micro

Exam Year(s)

MH SET - 2020, SET Exam - 2020,

Answer: B

Windows uses a Hybrid kernel and Linux a Monolithic kernel.

The Windows NT kernel combines microkernel ideas (a small executive, subsystems and message passing) with many services running in kernel mode for speed, so it is classed as hybrid. Linux runs the whole kernel, including drivers, file systems and networking, in a single kernel address space, which is the monolithic design, extended with loadable modules.

Linux is not a microkernel (Linus Torvalds famously debated that with Andrew Tanenbaum), so options pairing it with 'Micro' are wrong, and Windows is not purely monolithic.

Discuss in Forum

16.

An operating system (OS) crashes on the average once in 30 days, that is , the Mean Time Between Failures (MTBF) = 30 days. When this happens, it takes 10 minutes to recover the OS, that is, the Mean Time To Repair (MTTR) = 10 minutes. The availability of the OS with these reliability figures is approximately :

A.96.97%
B.97.97%
C.99.009%
D.99.97%

Exam Year(s)

MH SET - 2021, SET Exam - 2021,

Answer: D

The availability is approximately 99.97%.

Availability is the fraction of time the system is up:

\[ \begin{aligned} A &= \frac{MTBF}{MTBF + MTTR} \\ &= \frac{43200}{43200 + 10} \\ &= 0.99977 \approx 99.97\% \end{aligned} \]

Here 30 days = 30 × 24 × 60 = 43,200 minutes, so both times are in minutes. The other options are far too low: 96.97% would mean about 22 hours of downtime a month, not 10 minutes.

Discuss in Forum

Loading…

Topics

Other Subjects

Tags: Operating System Structure Questions and Answers || Operating System Structure MCQ Questions and Answers || Operating System Structure GK Questions and Answers || Operating System Structure GK MCQ Questions || Operating System Structure Multiple Choice Questions and Answers || Operating System Structure GK || GK on Operating System Structure || Operating Systems Questions and Answers || Operating Systems MCQ Questions and Answers || Operating Systems GK Questions and Answers || GK on Operating Systems

Operating System Structure Questions and Answers

Topics

Other Subjects

About Us

Stay informed about all important Dates & Notifications