Operating System - 6

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

Multiple Choice Multiple Answer
Question
locate the transmission devices :-
Correct Answer
Network cards , Modems
Your Answer
Tapes , Network cards , Modems

True/False
Question
The user process issues a network I/O system call to send the character to the remote machine.
Correct Answer
True
Your Answer
True

Multiple Choice Single Answer
Question
The process by which objects of one class acquire properties of objects of other class is called
Correct Answer
Inheritance
Your Answer
Inheritance

True/False
Question
Windows NT uses a message passing implementation for I/O.
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
We need two separate modes of operation to protect the operating system and all other programs and their data from malfunctioning program. Which are those modes?
Correct Answer
User mode , Monitor mode
Your Answer
User mode , Monitor mode

Match The Following
Question
Correct Answer
Your Answer
Round-robin
Time quantum
Time quantum
First-come First-served
First come job
First come job
Shortest job
Shortest job
Shortest job
Priority
Highest priority job
Highest priority job

Multiple Choice Single Answer
Question
The segment is :-
Correct Answer
Logical entity
Your Answer
Logical entity

Multiple Choice Single Answer
Question
In UNIX, decisions regarding which process to swap in or out are made by whom?
Correct Answer
Swapper
Your Answer
Memory handler

Select The Blank
Question
A ________ is a client-server mechanism that enables an application on one machine to make a procedure call to code on another machine.
Correct Answer
Remote-procedure-call
Your Answer
Remote-procedure-call

Multiple Choice Single Answer
Question
When each process that wants to communicate must explicitly name the recipient or sender of the communication, then such communication is called as :-
Correct Answer
Direct communication
Your Answer
Indirect communication

Select The Blank
Question
In Linux, the allocator uses a ________ algorithm to keep track of available physical pages.
Correct Answer
Buddy-heap
Your Answer
Binary-search

Multiple Choice Single Answer
Question
What does the rows of the access matrix represents?
Correct Answer
Domains
Your Answer
Domains

Multiple Choice Single Answer
Question
Every change in policy requires a change in the underlying :-
Correct Answer
Mechanism
Your Answer
System

Select The Blank
Question
A ________ in NT is an object that provides a uniform interface for files, whether they are local or remote.
Correct Answer
Redirector
Your Answer
Domain

Multiple Choice Multiple Answer
Question
In Solaris 2, user-level threads may be:-
Correct Answer
Bound , Unbound
Your Answer
Bound , Unbound

Multiple Choice Multiple Answer
Question
An audit log records which things about an object ?
Correct Answer
Time , User , Type of access
Your Answer
Time , User , Type of access

Multiple Choice Multiple Answer
Question
One-to-one model is supported by following systems :-
Correct Answer
Windows NT , OS/2
Your Answer
OS/2 , Windows NT

Multiple Choice Multiple Answer
Question
To protect the system, we must take security measures at two levels, such as :-
Correct Answer
Physical level , Human level
Your Answer
Human level , Global level

Multiple Choice Single Answer
Question
If the process is waiting for some event to occur then it is said to be in :-
Correct Answer
Waiting state
Your Answer
Waiting state

Multiple Choice Single Answer
Question
A common representation for a discussion of process scheduling is a :-
Correct Answer
Queuing diagram
Your Answer
Process state diagram

True/False
Question
At Physical level, the site or sites containing the computer systems must be physically secured against armed or surreptitious entry by intruders.
Correct Answer
True
Your Answer
True

Select The Blank
Question
When you express user-system interaction, the scenario in the model is called ________
Correct Answer
Case model
Your Answer
Case model

True/False
Question
Data transfer from cache to CPU and registers is usually a software function, with little operating system intervention.
Correct Answer
False
Your Answer
True

True/False
Question
A file in NTFS is a simple byte stream as it is in MS-DOS or UNIX .
Correct Answer
False
Your Answer
False

Multiple Choice Single Answer
Question
Polymorphism means ability to take
Correct Answer
More than one form
Your Answer
More than one form

True/False
Question
Aging algorithm is based on LRU.
Correct Answer
True
Your Answer
True

Select The Blank
Question
The virtual memory portion of the NT executive is the ________.
Correct Answer
Virtual memory manager
Your Answer
Virtual memory manager

Multiple Choice Multiple Answer
Question
There are two types of Message passing, they are :-
Correct Answer
Synchronous , Asynchronous
Your Answer
Synchronous , Asynchronous

Select The Blank
Question
Web servers use the ________ protocol to communicate with web browsers.
Correct Answer
http
Your Answer
http

Multiple Choice Multiple Answer
Question
The security of a system can be improved by two management techniques, such as :-
Correct Answer
Threat monitoring , Audit Log
Your Answer
Audit Log , Threat finding

Select The Blank
Question
The concept of protection levels and call gates were pioneered in MULTICS, where they were viewed as protection ________.
Correct Answer
Ring
Your Answer
Ring

True/False
Question
We say that a system is secure if its resources are used and accessed as intended under all circumstances.
Correct Answer
True
Your Answer
True

Select The Blank
Question
The ________ controller is the controller at the computer end of the bus.
Correct Answer
Host
Your Answer
Cpu

Multiple Choice Multiple Answer
Question
In Linux, the paging system can be divided into sections, namely:-
Correct Answer
Policy algorithm , Paging mechanism
Your Answer
Policy algorithm , Paging mechanism

True/False
Question
Keyboard is a sharable device.
Correct Answer
True
Your Answer
False

True/False
Question
Transfer of data from disk to memory is usually controlled by the operating system.
Correct Answer
True
Your Answer
True

True/False
Question
Prototyping not only helps to build a quality design but also enables the designer to build the system decremantally.
Correct Answer
False
Your Answer
True

Select The Blank
Question
The UNIX system uses ________ to avoid the necessity of keeping its password list secret.
Correct Answer
Encryption
Your Answer
Encryption

Match The Following
Question
Correct Answer
Your Answer
Read-write devices
Disks
Disks
Dedicated devices
Tape
CD-ROM
Read-only devices
CD-ROM
Tape
Write-only devices
Graphics controller
Keyboard

Multiple Choice Single Answer
Question
A procedure call, request to execute a method is termed as
Correct Answer
Message
Your Answer
Message

Select The Blank
Question
Context switch times are highly dependent on ________ support.
Correct Answer
Hardware
Your Answer
Hardware

Multiple Choice Multiple Answer
Question
Two main jobs of a computer are :-
Correct Answer
I/O , Processing
Your Answer
I/O , Processing

Multiple Choice Single Answer
Question
The 4.3BSD operating system is the version of :-
Correct Answer
UNIX
Your Answer
UNIX

Multiple Choice Single Answer
Question
The number of processes that are completed per time unit is called as:-
Correct Answer
Throughput of system
Your Answer
Throughput of system

Multiple Choice Multiple Answer
Question
Once the I/O is started , which two courses of action are possible?
Correct Answer
Synchronous I/O , Asynchronous I/O , Simple I/O
Your Answer
Synchronous I/O , Asynchronous I/O

Multiple Choice Multiple Answer
Question
Security violations of the system can be categorized as :-
Correct Answer
Malicious , Accidental
Your Answer
Malicious , Accidental

Select The Blank
Question
A process migrates between the various ________ throughout its lifetime.
Correct Answer
Scheduling queues
Your Answer
Scheduling queues

Operating System - 5

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

Select The Blank
Question
static binding allows to hold certain properties fixed and rigid, whereas ________ binding allows object to behave as per conditions emerge.
Correct Answer
Dynamic
Your Answer
Dynamic

Multiple Choice Single Answer
Question
DVMA stands for :-
Correct Answer
Direct Virtual Memory Access
Your Answer
Direct Virtual Memory Access

True/False
Question
Since caches have limited size, cache management is an important design problem.
Correct Answer
True
Your Answer
True

Multiple Choice Single Answer
Question
C++ is basically a procedural language having extension of
Correct Answer
Object Oriented technology
Your Answer
Object Oriented technology

Multiple Choice Single Answer
Question
The system call checks the arguments given by the application, builds a data structure to convey the arguments to the kernel and then executes a special instruction called as :-
Correct Answer
Software interrupt
Your Answer
Software interrupt

Multiple Choice Single Answer
Question
A system consists of collection of :-
Correct Answer
Processes
Your Answer
Processes

Select The Blank
Question
A________ is a memory area that stores data while they are transferred between two devices or between a device and an application.
Correct Answer
Buffer
Your Answer
Buffer

Multiple Choice Multiple Answer
Question
Find out the human-interface devices :-
Correct Answer
Screen , Keyboard , Mouse
Your Answer
Screen , Keyboard , Mouse

Multiple Choice Single Answer
Question
A procedure body implementing an operation is termed as
Correct Answer
Method
Your Answer
Method

Select The Blank
Question
The designer of a program or system might leave a hole, or ________ , in the software that only he is capable of using.
Correct Answer
Trap door
Your Answer
Trap door

True/False
Question
The principle of polymorphism helps to extend and modify the system scope through appropriate messaging mechanism.
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
The Linux system is composed of three main bodies of code, in line with most traditional UNIX implementations. Which are :-
Correct Answer
Kernel , System libraries , System utilities
Your Answer
Kernel , System libraries , System utilities

Select The Blank
Question
Web servers use the ________ protocol to communicate with web browsers.
Correct Answer
http
Your Answer
http

Multiple Choice Single Answer
Question
The pure Object Oriented language is
Correct Answer
Java
Your Answer
Java

Multiple Choice Multiple Answer
Question
User level threads are generally :-
Correct Answer
Fast to create , Easy to manage
Your Answer
Fast to create , Easy to manage

True/False
Question
Switching the cpu to another process requires saving the state of the old process and loading the saved state for the new process.
Correct Answer
True
Your Answer
True

Multiple Choice Single Answer
Question
The process by which objects of one class acquire properties of objects of other class is called
Correct Answer
Inheritance
Your Answer
Inheritance

Multiple Choice Single Answer
Question
In Object Oriented technology following expression is appropriate
Correct Answer
object=data+menthods
Your Answer
object=data+menthods

True/False
Question
A copy of inode is kept in main memory while a file is open.
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
The advantage of dynamic loading is
Correct Answer
Unused routine is never loaded , Useful when large amount of code are needed to handle infrequently occurring cases, such as error routines , It does not require special support from the operating system
Your Answer
It does not require special support from the operating system , Unused routine is never loaded , Useful when large amount of code are needed to handle infrequently occurring cases, such as error routines

Select The Blank
Question
OOSAD begins with identification of actors, what activities they perform and building ________ model for the function.
Correct Answer
Use-case
Your Answer
Use-case

Multiple Choice Single Answer
Question
If a class fruit has object mango, the relationship is expressed as :
Correct Answer
Fruit mango
Your Answer
Fruit mango

Multiple Choice Single Answer
Question
The class bird should have object
Correct Answer
Egale
Your Answer
Egale

Select The Blank
Question
The ________ controller is the controller at the computer end of the bus.
Correct Answer
Host
Your Answer
Host

Multiple Choice Single Answer
Question
The insulation of data from direct access by the program is known as :
Correct Answer
Data hiding
Your Answer
Data hiding

Multiple Choice Multiple Answer
Question
Liner address is divided into fields like :-
Correct Answer
Dir , Page , Offset
Your Answer
Dir , Page , Offset

Multiple Choice Single Answer
Question
Every change in policy requires a change in the underlying :-
Correct Answer
Mechanism
Your Answer
Mechanism

Multiple Choice Single Answer
Question
UNIX operating system is written mostly in :-
Correct Answer
C language
Your Answer
C language

Multiple Choice Single Answer
Question
In UNIX, a file is represented by an :-
Correct Answer
Inode
Your Answer
Inode

Select The Blank
Question
If paging is enabled, the liner address is interpreted as virtual address and mapped to the physical address using ________ table.
Correct Answer
Page
Your Answer
Page

Multiple Choice Multiple Answer
Question
What are the forms of malicious access?
Correct Answer
Unauthorized destruction of data , Unauthorized reading of data , Unauthorized modification of data
Your Answer
Unauthorized reading of data , Unauthorized modification of data , Unauthorized destruction of data

Multiple Choice Multiple Answer
Question
What are the components to memory management under Linux?
Correct Answer
Physical memory manager , Virtual memory manager
Your Answer
Physical memory manager , Virtual memory manager

Multiple Choice Single Answer
Question
IPC is particularly useful in a :-
Correct Answer
Distributed environment
Your Answer
Distributed environment

Select The Blank
Question
Context switch times are highly dependent on ________ support.
Correct Answer
Hardware
Your Answer
Hardware

Multiple Choice Multiple Answer
Question
kernel threads are supported by following operating systems :-
Correct Answer
Windows NT , Solaris , Digital UNIX
Your Answer
Windows NT , Solaris , Digital UNIX

Select The Blank
Question
A ________ in NT is an object that provides a uniform interface for files, whether they are local or remote.
Correct Answer
Redirector
Your Answer
Redirector

Multiple Choice Multiple Answer
Question
In a uniprocessor system, there is :-
Correct Answer
Single processor , Single running process
Your Answer
Single processor , Single running process

True/False
Question
The basic difference between SSAD life cycle models and OOSAD life cycle models is that one is evolutionary & iterative while the other is sequential in stages of analysis, design, coding, unit test, integrated test and system test.
Correct Answer
True
Your Answer
True

Match The Following
Question
Correct Answer
Your Answer
Ready state
Process waiting for cpu
Process waiting for cpu
New state
Process created
Process created
Running state
Executing process
Executing process
Waiting state
Waiting process
Waiting process

Match The Following
Question
Correct Answer
Your Answer
Parent process
Child process
Child process
Foreground processes
Interactive processes
Interactive processes
Background processes
Batch processes
Batch processes
Light-Weight processes
Thread
Thread

Multiple Choice Single Answer
Question
In how many number of classes does the NRU algorithm divides pages, depending on the state of R and M?
Correct Answer
4
Your Answer
4

True/False
Question
When application issues a blocking I/O system call, the request is placed on the queue for that device.
Correct Answer
True
Your Answer
True

Select The Blank
Question
During execution, ________ register holds the sector for the data segment.
Correct Answer
DS
Your Answer
DS

True/False
Question
Banker's algorithm is a deadlock-avoidance algorithm.
Correct Answer
True
Your Answer
True

Multiple Choice Single Answer
Question
Model of protection can be viewed abstractly as a matrix which is known as :-
Correct Answer
Access matrix
Your Answer
Access matrix

Multiple Choice Multiple Answer
Question
Kernel threads are generally :-
Correct Answer
Slower to create , Difficult to manage
Your Answer
Slower to create , Difficult to manage

Multiple Choice Multiple Answer
Question
One-to-one model is supported by following systems :-
Correct Answer
Windows NT , OS/2
Your Answer
Windows NT , OS/2

Operating System - 4

LIST OF ATTEMPTED QUESTIONS AND ANSWERS

Multiple Choice Multiple Answer
Question
Kernel threads are generally :-
Correct Answer
Slower to create , Difficult to manage
Your Answer
Slower to create , Difficult to manage

Select The Blank
Question
If the user-supplied password matches the password stored in the system, the system assumes that the user is ________.
Correct Answer
Legitimate
Your Answer
Legitimate

Multiple Choice Single Answer
Question
In general , the access matrix will be :-
Correct Answer
Sparse
Your Answer
Sparse

True/False
Question
Encryption is one common method of protecting information that is transmitted over unreliable links.
Correct Answer
True
Your Answer
False

Select The Blank
Question
A ________ is a full duplex connection between a device driver and a user-level process.
Correct Answer
Stream
Your Answer
Stream

Multiple Choice Single Answer
Question
In how many number of classes does the NRU algorithm divides pages, depending on the state of R and M?
Correct Answer
4
Your Answer
8

Select The Blank
Question
The Pentium page size is fixed at ________ KB.
Correct Answer
4
Your Answer
4

True/False
Question
Volatile storage loses its contents when the power to the device is removed.
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
The movement of information between levels of a storage hierarchy may be of two types depending on the hardware design and the controlling operating system software such as :-
Correct Answer
Explicit , Implicit
Your Answer
Explicit , Implicit

Select The Blank
Question
In queuing diagram, the arrow indicates the flow of ________ in the system.
Correct Answer
Processes
Your Answer
Processes

Multiple Choice Multiple Answer
Question
What are the forms of malicious access?
Correct Answer
Unauthorized reading of data , Unauthorized modification of data , Unauthorized destruction of data
Your Answer
Unauthorized reading of data , Unauthorized modification of data , Unauthorized destruction of data

Select The Blank
Question
A bit called the ________ , is added to the hardware of the computer to indicate the current mode.
Correct Answer
Mode bit
Your Answer
Mode bit

Multiple Choice Multiple Answer
Question
In Windows NT , kernel uses which two sets of objects?
Correct Answer
Dispatcher objects , Control objects
Your Answer
Dispatcher objects , Complex objects

Multiple Choice Single Answer
Question
The smallest addressable portion of a disk is :-
Correct Answer
Sector
Your Answer
Sector

True/False
Question
In FIFO algorithm the page removed from memory is the one which most recently used.
Correct Answer
False
Your Answer
False

Select The Blank
Question
A process is ________, if it cannot affect or be affected by the other processes executing in the system.
Correct Answer
Independent
Your Answer
Independent

Multiple Choice Multiple Answer
Question
Linux presents standard interfaces to whom?
Correct Answer
Programmer , User
Your Answer
Programmer , User , System administrator

Select The Blank
Question
The kernel module that controls a device is a ________ .
Correct Answer
Device driver
Your Answer
Device daemon

True/False
Question
Whenever a trap or interrupt occurs, the hardware switches from user mode to monitor mode.
Correct Answer
True
Your Answer
True

Select The Blank
Question
A ________ is a computer or router that sits between the trusted and untrusted systems.
Correct Answer
Firewall
Your Answer
Firewall

Multiple Choice Multiple Answer
Question
Find out the basic I/O hardware elements from the following :-
Correct Answer
Ports , Buses , Device controllers
Your Answer
Ports , Buses , Device controllers

True/False
Question
Object-oriented programming focuses on the integrated data and functionality as discrete units that have both knowledge (data) and capabilities (functions). Procedural programs, on the other hand, focus on functions and how they act on data.
Correct Answer
True
Your Answer
True

Match The Following
Question
Correct Answer
Your Answer
User mode
Mode bit 1
Mode bit 1
Serial port
Modem
Monitor mode
Parallel port
Printer
Printer
Privileged instructions
Monitor mode
Mode bit 0

True/False
Question
In segmentation the total address space can exceed the size of physical memory.
Correct Answer
True
Your Answer
False

Multiple Choice Single Answer
Question
Because of the concept of independent objects responding to messages, object orientation is a natural way to implement
Correct Answer
Event driven programming
Your Answer
Message deiven programming

Multiple Choice Single Answer
Question
In UNIX, everything below the system-call interface and above the physical hardware is the :-
Correct Answer
Kernel
Your Answer
I/O system

Multiple Choice Multiple Answer
Question
Different multithreading models available are :-
Correct Answer
Many-to-one model , One-to-one model , Many-to-many model
Your Answer
Many-to-one model , One-to-one model , Many-to-many model

Multiple Choice Multiple Answer
Question
An object type in windows NT is a system defined data type that has two things associated with it, which are they?
Correct Answer
Set of attributes , Set of methods
Your Answer
Object-type , Object-processing

Multiple Choice Multiple Answer
Question
When memory reference occurs in MULTICS the things which takes place are :-
Correct Answer
Segment number is used to find segment descriptor , Check is made to see if segment's page table is in memory , Page table entry for requested virtual page is examined , Offset is added to the page origin to give main memory address
Your Answer
Segment number is used to find segment descriptor , Check is made to see if segment's page table is in memory , Page table entry for requested virtual page is examined

Multiple Choice Single Answer
Question
The interval from the time of submission of a process to the time of completion is :-
Correct Answer
Turnaround time
Your Answer
Turnaround time

True/False
Question
Context switch times are highly dependent on hardware support.
Correct Answer
True
Your Answer
True

True/False
Question
Procedure and data can be distinguished and separately protected in segmentation
Correct Answer
True
Your Answer
True

Multiple Choice Multiple Answer
Question
Dispatcher functions involves the following :-
Correct Answer
Switching context , Switching to user mode
Your Answer
Switching context , Switching to user mode

Multiple Choice Single Answer
Question
The First version of UNIX was developed in 1969 by Ken Thompson of the Research Group at :-
Correct Answer
Bell Laboratories
Your Answer
Bell Laboratories

Multiple Choice Single Answer
Question
In Object Oriented technology following expression is appropriate
Correct Answer
object=data+menthods
Your Answer
object=data+menthods

Multiple Choice Single Answer
Question
A procedure body implementing an operation is termed as
Correct Answer
Method
Your Answer
Method

Select The Blank
Question
During execution, ________ register holds the sector for the code segment.
Correct Answer
CS
Your Answer
PS

True/False
Question
In some operating system, spooling is managed by a system daemon process.
Correct Answer
True
Your Answer
False

Select The Blank
Question
Each column in the access matrix can be implemented as an ________ for one object.
Correct Answer
Access list
Your Answer
Capability list

Multiple Choice Single Answer
Question
Policies for resource use may vary depending on the :-
Correct Answer
Application
Your Answer
System

Multiple Choice Multiple Answer
Question
A mailbox can be owned by :-
Correct Answer
Process , Operating system
Your Answer
User , Process , Program

Multiple Choice Single Answer
Question
The ready queue is generally stored as a :-
Correct Answer
Linked list
Your Answer
Queue

Select The Blank
Question
A ________ is region of fast memory that hold copies of data .
Correct Answer
Cache
Your Answer
Cache

Multiple Choice Multiple Answer
Question
What are the components to memory management under Linux?
Correct Answer
Physical memory manager , Virtual memory manager
Your Answer
Physical memory manager , Virtual memory manager

Match The Following
Question
Correct Answer
Your Answer
Bounded-buffer
Fixed size buffer
Fixed size buffer
Producer
Produces process
Produces process
Consumer
Consumes process
Consumes process
Unbounded-buffer
No limit on size of buffer
No limit on size of buffer

True/False
Question
The inode contains 15 pointers to the disk blocks containing the data contents of the file.
Correct Answer
True
Your Answer
True

Multiple Choice Single Answer
Question
When computer is powered up or rebooted, it needs to have an initial program to run. This initial program is known as :-
Correct Answer
Bootstrap program
Your Answer
Bootstrap program