Subscribe Facebook Twitter Google Plus Stumble upon

MCQ Questions on Threads, SMP And Microkernels Part-1

1. ............ is an effective means of structuring the operating system to support process management and its other tasks.
A) Thread
B) Symmetric Multiprocessing
C) Process
D) Micro kernel

2. With ........... , the operating system must be able simultaneously to schedule different processes on multiple processors.
A) Thread
B) Symmetric Multiprocessing
C) Process
D) Micro kernel

3. ........... is an example of a system of one process with multiple threads.
A) MS-Dos
B) UNIX
C) Java run time environment
D) Linux

4. Which of the following is/are the key benefits of threads derive from the performance implications
i) It takes for less time to create a new thread in a existing process than to create a brand new process
ii) It takes less time to terminate a thread than a process
iii) It takes less time to switch between two threads with in the same processes
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii

5. State whether the following statements about thread are True.
i) The unit of resource ownership is usually referred to as thread.
ii) Thread enhance efficiency in communication between different executing programs.
iii) An example of an application that could make use of threads is a file server.
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii

6. Which of the following are the example of the uses of threads in a single user multiprocessing system.
i) Foreground and background work ii) Synchronous processing iii) Speed execution iv) Modular program structure
A) i, ii and iii only
B) ii, iii and iv only
C) i, iii and iv only
D) All i, ii, iii and iv

7. ........... with in a single user multi processing system programs that involve a variety of activities or a variety of sources and destinations of input and output may be easier to design and implement using threads.
A) Foreground and background work
B) Synchronous processing
C) Speed execution
D) Modular program structure

8. Which of the following are the basic thread operations associated with a change in thread state.
i) spawn  ii) Block  iii) Pause  iv) Unblock  v) Finish
A) i, ii, iii and iv
B) ii, iii, iv and v
C) i, ii, iv and v
D) i, iii, iv and v

9. In ............ , all of the work of thread management is done by the application and the kernel is not aware of the existence of threads.
A) User level threads
B) Kernel level threads
C) Application level threads
D) Process level threads

10. There are a number of advantages to the use of user level threads over kernel level threads. They are
i) scheduling can be application specific
ii) ULT can run on any operating system
iii) Does not require kernel mode privileges
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii

Read More »

MCQ On Fundamental Of Process Management In OS Part-3

1. ............... in Pentium EFLAGS register control operating mode bits represents carrying or borrowing between half-bytes or an 8-bit arithmetic or logic operation.
A) Carry flag
B) Over flow flag
C) Nested task flag
D) Virtual interrupt flag

2. Less-privileged mode in the mode of processor execution normally associated with the operating system is often referred to as the ............... mode.
A) System mode
B) Control mode
C) Kernel mode
D) User mode

3. Which of the following is/are the typical functions of an operating system kernel
i) Process Management   ii) Memory Management  iii) I/O Management  iv) Support Functions
A) i, ii and iii only
B) ii, iii and iv only
C) i, iii and iv only
D) All i, ii, iii and iv

4. The process management function of an operating system kernel includes
i) Process creation and termination   ii) Process Switching  iii) Swapping  iv) Process Scheduling and Dispatching
A) i, ii and iii only
B) ii, iii and iv only
C) i, ii and iv only
D) All i, ii, iii and iv

5. The memory management function of an operating system includes
i) Allocation of address space to processes ii) Swapping  iii) Process Switching  iv) Page and segment management
A) i, ii and iii only
B) ii, iii and iv only
C) i, ii and iv only
D) All i, ii, iii and iv

6. The support functions of an operating system kernel includes
i) Interrupt handling   ii) Buffer Management  iii) Accounting   iv) Monitoring
A) i, ii and iii only
B) i, iii and iv only
C) i, ii and iv only
D) All i, ii, iii and iv

7. Once the operating system decides, to create a new process, it can be processed as the following steps order.
i) initialize the process control block
ii) Assign a unique process identifier to the new process
iii) Allocate space for the process
iv) Create or expand other data structures
v) Set the appropriate linkages
A) ii, iii, i, v and iv
B) i, iii, v and iv
C) i, ii, iii, v and iv
D) ii, iv, v and iii

8. ............ may occur any time that the operating system has gained control from the currently running process.
A) Process Scheduling
B) Process Creation
C) Process Switching
D) Process Synchronization

9. With an ordinary ............, control is first transferred to an ............handler, which does some basic housekeeping and then branches to an operating system routine.
A) Interrupt
B) Trap
C) Supervisor Call
D) Memory Fault

Read More »

MCQ On Fundamental Of Process Management In OS Part-2

1. ................... are used to keep track of both main and secondary memory in which some of main memory is reserved for use by the operating system and the reminder is available for use by processes.
A) Memory tables
B) I/O tables
C) File tables
D) Process tables

2. The memory table includes which of the following information
i) The allocation of main memory to processes
ii) The allocation of secondary memory to processes
iii) An information needed to manage virtual memory
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii

3. ............... includes information of any protection attributes of blocks of main or virtual memory, such as which processes may access certain shared memory regions.
A) Memory tables
B) I/O tables
C) File tables
D) Process tables

4.  ................... provide information about the existence of files, their location on secondary memory, their current status and other attributes.
A) Memory tables
B) I/O tables
C) File tables
D) Process tables

5. Each process has associated with it a number of attributes that are used by the operating system for the process control, these collections of attributes is referred to as a ................
A) System stack
B) Process control block
C) Attributes block
D) Attributes control block

6.  The process image includes which of the following elements
i) user data   ii) user program  iii) system stack   iv) process control block
A) i, ii and iv only
B) ii, iii and iv only
C) i, iii and iv only
D) All i, ii, iii and iv

7. With respect to ............................ , in virtually all operating systems each process is assigned a unique numeric identifier, which may simply be an index into the primary process table.
A) Process identification
B) Processor sate identification
C) Processor state information
D) Process control information

8. Numeric identifiers that may be stored with the process control block includes
i) Identifier of the process  ii) Identifier of the process that created parent process  iii) User identifier
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii

9. There are variety of processor registers that are employed to control the operation of the processor. This includes
i) program counter  ii) program codes  iii) condition codes  iv) status information
A) i, ii and iv only
B) ii, iii and iv only
C) i, iii and iv only
D) All i, ii, iii and iv

10. .................... consists of the contents of processor registers while a process is running.
A) Process identification
B) Processor sate identification
C) Processor state information
D) Process control information

Read More »

MCQ On Fundamental Of Process Management In OS Part-1

1. Which of the following is/are the reasons for the execution of process in two state process model.
i) A process is created when a user at a terminal logs on to the system.
ii) A process is created in response to the submission of a job
iii) A process is created to perform a function on behalf of a user program
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii

2. In two state process model a process is terminated when
i) A piece of data is of the wrong type or is not initialized
ii) The process attempts to use an instruction reserved for the operating system
iii) The child process was terminated
iv) The process has waited longer than specified time.
A) i, ii and iii only
B) ii, iii and iv only
C) i, ii and iv only
D) All i, ii, iii and iv

3. Which of the following is/are states in five state model for the creation and termination of processes.
i) Running  ii) Ready  iii) Blocked  iv) Paused  v) Exit
A) i, ii, iii and iv only
B) ii, iii, iv and v only
C) i, ii, iii and v only
D) All i, ii, iii, iv and v

4. In five state process model ........................ state is a process that is prepared to execute when given the opportunity.
A) Ready
B) Paused
C) Queued
D) Blocked

5. In five state process model .................... state is a process than that can not execute until some event occurs, such as the completion of a I/O operation.
A) Ready
B) Paused
C) Queued
D) Blocked

6. In ....................... state of five state process model, a process that has been released from the pool of executable process by the OS either because it halted or because it aborted for some reason.
A) Blocked
B) Exit
C)  Released
D) Ready

7.  .......................... transition occurs when it is time to select a new process to run, the operating system chooses one of the processes in the ready state.
A) Null → Ready
B) Ready → Running
C) New → Ready
D) Running → Ready

8. In transaction of five state process model, if a parent terminates, all child processes associated with that parent may be terminated.
A) Running → Exit
B) Blocked → Exit
C) Ready → Exit
D) New → Exit

9. With the use of swapping, an I/O operation, one other state must be added to the process behavior model called the .................. state.
A) Paused
B) Blocked
C) Swapped
D) Suspend

10. When all of the processes in main memory are in ...................... state, the operating system can suspend one process by putting it in the suspend state and transferring to the disk.
A) Blocked
B) Exit
C) Suspend
D) Paused

Read More »

MCQ on Integrated Service Digital Network (ISDN) Part-2

1. ................... can be used for carrying digital data, PCM encoded voice signal, coded at 64 Kbps.
A) A channel
B) B channel
C) D channel
D) H channel

2. Different types of connections which can be set up over a B channel of ISDN is/are ..
i) Packet switched connections  ii) Circuit switched connections  iii) Frame mode connections   iv) Semi permanent connections
A) i, ii and iv only
B) i, iii and iv only
C) ii, iii and iv only
D) All i, ii, iii and iv

3............ are used for user information a higher bit rates such as fast facsimile, video, high speed data, high quality audio etc.
A) A channels
B) B channels
C) D channels
D) H channels

4. Basic channel structure of H channels is a package offered to the user which consists of .......... full duplex 64Kbps B channel(s) and ......... full duplex 16Kbps D channel.
A) one, two
B) two, one
C) two, three
D) three, two

5. ............. of ISDN refers to certain finite arrangements of physical equipment or combination of equipment
A) Reference grouping
B) Reference points
C) Functional grouping
D) Functional points

6. ............ in ISDN correspond to the conceptual points used in order to separate groups of functions.
A) Reference grouping
B) Reference points
C) Functional grouping
D) Functional points

7. ............ includes the functions associated with the physical and electrical termination of the ISDN on the user's premises.
A) Network Termination 1 (NT1)
B) Network Termination 2 (NT2)
C) Network Termination 1,2 (NT12)
D) Terminal Equipment Type 1 (TE1)

8. ............. is a customer premises switching equipment and it is an intelligent device which performs switching and concentration functions.
A) Network Termination 1 (NT1)
B) Network Termination 2 (NT2)
C) Network Termination 1,2 (NT12)
D) Terminal Equipment Type 1 (TE1)

9. Digital telephones integrated voice/data terminals and digital fax are the examples of ............. in ISDN.
A) Network Termination 1 (NT1)
B) Network Termination 2 (NT2)
C) Network Termination 1,2 (NT12)
D) Terminal Equipment Type 1 (TE1)

10. The different reference points in ISDN is/are
i) Terminal point (T)  ii) System Reference Point (S)  iii) Rate Reference Point (R)  iv) United Reference Point (U)
A) i, ii and iii only
B) i, iii and iv only
C) ii, iii and iv only
D) All i, ii, iii and iv

Read More »

MCQ On Integrated Service Digital Network (ISDN) Part-1

1. The narrowband ISDN has a smaller bandwidth and it can support the data rates of upto ............
A) 62Kbits/s
B) 64Kbits/s
C) 66Kbits/s
D) 68Kbit/s

2. The first generation of ISDN is called as a narrowband ISDN which has a ............... orientation.
A) circuit switching
B) diatagram packet switching
C) message switching
D) virtual circuit packet switching

3. The main important technical contribution of B-ISDN is the ......
A) SMDS
B) Frame relay
C) X.25
D) ATM

4. The main important technical contribution of narrowband ISDN is .....
A) SMDS
B) Frame relay
C) X.25
D) ATM

5. Which of the following is/are the services provided by ISDN.
i) Existing voice applications   ii) Data applications   iii) Fascimile(FAX)   iv) Teletext services
A) i, ii and iii only
B) ii, iii and iv only
C) i, iii and iv only
D) All i, ii, iii and iv

6. The development of ISDN is governed by a set of recommendations issued by ...........
A) CCITT
B) ITTCC
C) TTICC
D) ITTCC

7. The ................. connects a large number of ISDN subscriber loop signals to the digital network.
A) Digital Networking office
B) Digital Central Office
C) Integrated Network Office
D) Digital Service Office

8. The ISDN is governed by  recommendations from ITU-T which are called as ............. of recommendations.
A) T-series
B) U-series
C) I-series
D) D-series

9. Which of the following is/are the operations performed by digital central office.
i) It provides access to the circuit switched network
ii) It provides subscriber access to the dedicated lines
iii) It accommodates multiplexed access via digital PBX and LAN
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii

10. Digital central office providers subscriber access to the ............ networks and time share transaction oriented computer services.
A) packet switched
B) circuit switched
C) message switched
D) telegraph switched

Read More »

Top 20 Interview Questions on Network Switching Methods

1. The transfer mode of a network that involves setting up a dedicated end to end connection is called .........
A) Circuit switching
B) Message switching
C) Telegraph switching
D) Packet switching

2. If ........................ is used in computer networks, the sending PC first establishes a link with the receiving link.
A) Packet switching
B) Message switching
C) Telegraph switching
D) Circuit switching

3. Telecommunication network is designed primarily for carrying voice signals which consists of ...........
i) access network that connects the subscribers to the telephone exchanges.
ii) hierarchy of telephone exchanges that switch the voice channels.
iii) trunk network that interconnects the telephone exchanges
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii

4. ................. does not establish a dedicated path between two communicating devices, where each message is treated as an independent unit and includes its own destination and source address.
A) Packet switching
B) Message switching
C) Telegraph switching
D) Circuit switching

5. In, ..................... each intermediate device receives the message, stores it, until the next device is ready to receive it and then forwards it to the next device.
A) Packet switching
B) Message switching
C) Telegraph switching
D) Circuit switching

6. The major advantage of .................. is that the dedicated transmission channel the computers establish provides transmission channel the computers establish provides a guaranteed data rate.
A) Packet switching
B) Message switching
C) Telegraph switching
D) Circuit switching

7. Which of the following is/are the disadvantage of circuit switching.
i) Dedicated channels require more bandwidth
ii) It takes long  time to establish connection
iii) There is a delay in data flow
iv) It cannot be used to transmit any other data even it the channel is free.
A) i, ii and iv only
B) ii, iii and iv only
C) i, iii and iv only
D) i, ii and iii only

8. State whether the following statements are correct for the advantages of message switching.
 i) Message switching provides synchronous communication across the time zones
ii) In message switching, the network devices share the data channels.
iii) It reduces network traffic congestion.
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii

9. In ...................., messages are broken up into packets, each of which includes a header with source, destination and intermediate node address information.
A) Packet switching
B) Message switching
C) Telegraph switching
D) Circuit switching

10. In .................. if a certain link in the network goes down during the transmission, the remaining packets can be sent through another route.
A) Circuit switching
B) Message switching
C) Telegraph switching
D) Packet switching

11. In ..................... , all the packets travel through t he logical connection established between the sending device and receiving device.
A) Circuit switching
B) Message switching
C) Virtual circuit packet switching
D) Datagram packet switching

12. ................. increases the bandwidth of the network by allowing many devices to communicate through the same network channel.
A) Circuit switching
B) Message switching
C) Virtual circuit packet switching
D) Datagram packet switching

13. Which of the following is/are the disadvantages of virtual circuit packet switching.
i) The switching node requires more processing power because the packet switching protocols are more complex.
ii) A switching node unable to route the packet as and when required.
iii) Packets are more easily lost on their route, hence sequence numbers are required to identify the missing packets.
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii
14. Email and Hop-by-Hop Telex forwarding are the examples of ................. systems.
A) Circuit switching
B) Message switching
C) Virtual circuit packet switching
D) Datagram packet switching

15. ................. is also known as store-and-forward switching since the messages are stored at intermediate nodes in route to their destinations.
A) Circuit switching
B) Message switching
C) Virtual circuit packet switching
D) Datagram packet switching
16. ............... networks do not require a circuit to be established and allow many pairs of nodes to communicate almost simultaneously over the same channel.
A) Circuit switching
B) Message switching
C) Telegraph switching
D) Packet switching

17. .................... is used to optimize the use of the channel capacity available in a network, to minimize the transmission latency and to increase the robustness of communication.
A) Circuit switching
B) Message switching
C) Telegraph switching
D) Packet switching

18. The most well-known use of packet switching is the ............
A) PSTN
B) Email
C) Internet
D) Hop-by-Hop Telex

19. Which of the following is/are the advantages of datagram packet switching.
i) Here the call setup phase is avoided, thus if a station wishes to send only one or few packets datagram delivery will be quicker.
ii) It is more primitive and flexible
iii) It is inherently more reliable, if a node fails, subsequent packets may find alternate route
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii
20. Telephone network of bi-directional real time transfer between computer is the application of .............. network.
A) Circuit switching
B) Message switching
C) Telegraph switching
D) Packet switching


Answers

1. A) Circuit switching
2. D) Circuit switching
3. D) All i, ii and iii
4. B) Message switching
5. B) Message switching
6. D) Circuit switching
7. A) i, ii and iv only
8. C) i and iii only
9. A) Packet switching
10. D) Packet switching
11. C) Virtual circuit packet switching
12. C) Virtual circuit packet switching
13. C) i and iii only
14. B) Message switching
15. B) Message switching
16. D) Packet switching
17. D) Packet switching
18. C) Internet
19. D) All i, ii and iii
20. A) Circuit switching

Read Next:MCQ On Integrated Service Digital Network (ISDN) Part-1

Read More »

Objective Questions On Data Transmission Medium Part-4

1. The electromagnetic waves having frequencies from 300GHz to 400GHz are known as .......
A) Medium Waves
B) Short Waves
C) Micro Waves
D) Infrared Waves

2. The electromagnetic waves having frequencies from 3GHz to 30MHz are known as .......
A) Medium Waves
B) Short Waves
C) Micro Waves
D) Infrared Waves

3. The wave length of the ................. ranges from 850nm and 900nm, where the receivers with good sensitivity are available.
A) visible light
B) infrared light
C) micro waves
D) radio waves

4. The .................... standard developed for an infrared data link(IRDA) provides the standards for the bidirectional communications used in cordless devices such as mice, keyboards, joysticks and handheld computers.
A) IRDA-A
B) IRDA-B
C) IRDA-C
D) IRDA-D

5. The .................... standard developed for an infrared data link (IRDA) provides the standards for the data rates from 115Kbps to 4Mbps with a distance upto 1 meter.
A) IRDA-A
B) IRDA-B
C) IRDA-C
D) IRDA-D

6. The ................... standard developed for an infrared data link provides the standards for the data rates of 75Kbits/sec and the distance range is upto 8 meter.
A) IRDA-A
B) IRDA-B
C) IRDA-C
D) IRDA-D

7. The disadvantage of .................. signals is that they cannot penetrate walls or other objects and they are diluted by strong light sources.
A) infrared
B) microwave
C) radio wave
D) long wave

8. For point to point communication in infrared system .............. depends on quality of emitted light, its purity, atmospheric conditions and signal obstructions.
A) Bandwidth capacity
B) Node capacity
C) Attenuation
D) EMI

9. For .................. communication in infrared system attenuation depends on quality of emitted light its purity and atmospheric conditions.
A) Point-to-point
B) Point-to-multipoint
C) Broadcast
D) Multi point-to-Multi point

Read More »

Objective Questions on Data Transmission Medium Part-3

1. Different ways the unguided signal can travel from the transmitter to receiver is/are
i) Ground wave propagation  ii) Sky propagation  iii) Space propagation
A) i and ii only
B) ii and iii only
C) i and iii only
D) All i, ii and iii

2. In electromagnetic spectrum, the frequencies in the range 30 kHz to 300 kHz are known as .......
A) Medium Frequencies (MF)
B) Low Frequencies (LF)
C) High Frequencies (HF)
D) Very Low Frequencies (VLF)

3. In electromagnetic spectrum, the frequencies in the range 30MHz to 300MHz are known as ........
A) High Frequencies (HF)
B) Ultra High Frequencies (UHF)
C) Very High Frequencies (VHF)
D) Super High Frequencies (SHF)

4. In radio frequency spectrum, the frequency range of very low frequencies will be .................
A) 100Km to 10Km
B) 10Km to 1Km
C) 10^3Km to 100Km
D) 100M to 10M

5. In radio frequency spectrum, the frequency range of very high frequencies will be ..............
A) 10 Km to 1 Km
B) 100 M to 10 M
C) 10 M to 1 M
D) 1 M to 10 Cm

6. For shortwave transmission, amateur and CB communication ................... spectrum are used.
A) High Frequencies (HF)
B) Ultra High Frequencies (UHF)
C) Very High Frequencies (VHF)
D) Super High Frequencies (SHF)

7. The application of super high frequencies(SHF) 3GHz to 30GHz is ...
A) Cellular phones
B) TV broadcasting
C) Satellite communication
D) AM radio broadcast

8. The medium frequencies (MF) from 300KHz to 30MHz are used for ......
A) Cellular phones
B) TV broadcasting
C) Satellite communication
D) AM radio broadcast
 
9. The signal occupying the range between 0.1mm and 700nm(nanometer) are called .......
A) electromagnetic signal
B) infrared signal
C) short signal
D) visible light

10. The various special kinds of communications performed using infrared signals is/are
i) In astronomy to detect stars ii) For guidance in weapon system  iii) FM broadcasting  iv) TV remote control
A) i, ii and iii only
B) i, ii and iv only
C) ii, iii and iv only
D) i, iii and iv only

Read More »

Objective Questions on Data Transmission Medium Part-2

1. In ................. transmission system are widely used in the backbone of network.
A) Fiber optic
B) Co-axial
C) UTP
D) STP

2.  State the following statements are True or False for the applications of optical fiber cables.
i) Optical fiber are now used in the telephone systems.
ii) The installation cost of optical fibers is higher than that for the Co-axial cables.
iii) They are used for analog telephone networks.
A) i-True, ii-False, iii-True
B) i-True, ii-True, iii-True
C) i-False, ii-True, iii-False
D) i-True, ii-True, iii-False

3. The sources of light for optical fiber communication ................. provides an unfocused light  which hits the core boundaries and get discussed.
A) ILD
B) LED
C) LOD
D) ELD

4. In optical fiber communication, the ................... can provide very focused beam that can be used for a long distance communication.
A) ILD
B) LED
C) LOD
D) ELD

5. Which of the following statements are True for step index and graded index fibers.
i) The light rays travel in straight line through the step index fibers.
ii) Acceptance cone of graded index fibers is smaller than that of the step index fiber.
iii) In graded index fiber, the light rays do not travel in straight line due to continuous refraction.
A) i and ii only
B) i and iii only
C) ii and iii only
A) All i, ii and iii

6. State True or False for following statements about single mode and multi-mode fibers.
 i) Multi-mode fiber can have either step index or graded index profile.
ii) Single mode fiber are high quality fiber for wide band long haul transmission.
iii) The amount of dispersion introduced in single mode fiber is greater than that introduced in the multi-mode fibers.
A) i-True, ii-False, iii-True
B) i-True, ii-True, iii-True
C) i-False, ii-True, iii-False
D) i-True, ii-True, iii-False

7. ............ cable has much lower attenuation and can carry signal to longer distances without using amplifiers and repeaters in between.
A) Optical fiber
B) Co-axial
C) UTP
D) STP

8. ................... cable is not affected by EMI effects and can be used in areas where high voltage are passing by .
A) Fiber optic
B) Co-axial
C) UTP
D) STP

9. State whether the following statements are True for the characteristics of optical fiber cables.
i) The cost of fiber optic cable is more compared to twisted pair  and Co-axial.
ii) The installation of fiber optic cables is easier.
iii) The number of modes which a fiber optic can support does not depend on its length.
A) i and ii only
B) i and iii only
C) ii and iii only
A) All i, ii and iii

10. .................... cable is not affected by potential shifts in the electrical ground, nor does it produce sparks.
A) Fiber optic
B) Co-axial
C) UTP
D) STP

Read More »

Objective Questions on Data Transmission Medium Part-1

1. ..................... cables are very cheap and easy to install, but they are badly affected by the noise interference.
A) STP
B) UTP
C) Co-axial
D) Optical Fiber

2. Twisting of wires in twisted pair cable helps to
A) increase the data speed
B) reduce the effect or noise or external interface
C) make the cable stronger
D) make the cable attractive

3. Applications of twisted pair cable is/are
i) In telephone lines to carry voice and data channels
ii) In the DSL line (ADSL)
iii) In the ISDN (Integrated Services Digital Network)
iv) In thick and thin Ethernet
A) i, ii and iii only
B) i, iii and iv only
C) ii, iii and iv only
D) All i, ii, iii and iv only

4. .................. UTP cables were originally used for voice communication with low data rates.
A) Category 1
B) Category 2
C) Category 1 and 2
D) Category 1, 2 and 3

5. Category 4 UTP cable offers data rates up to ..............
A) 10 Mbps
B) 15 Mbps
C) 20 Mbps
D) 25 Mbps

6. Category 6 UTP cable offers data rates up to ..............
A) 100 Mbps
B) 200 Mbps
C) 300 Mbps
D) 400 Mbps

7. State whether the following statements are True for twisted pair cable.
i) The attenuation of both STP and UTP ii) The cost of UTP is higher than STP  iii) The installation of STP is fairly easy than UTP
A) i and iii only
B) i and ii only
C) ii and iii only
D) All i, ii and iii

8.  A modulator .................... telephone connector is used to connect a four pair twisted pair calble.
A) RJ35
B) RJ45
C) RJ11
D) RJ21

9. ....................... cable also find application in cable television networks for computer communications.
A) Co-axial
B) UTP
C) STP
D) Optical Fiber

10.  ..................... cable suffers more impairment than .................. cable which in turn suffers more than ...............
A) Co-axial, Twisted, Optical Fiber
B) Twisted, Co-axial, Optical Fiber
C) Co-axial, Optical Fiber, Twisted
D) Twisted, Optical Fiber, Co-axial

Read More »

MCQ Questions On Data Transmission Techniques Part-3

1. ................. is the process of converting binary data, sequence of bits to a digital signal.
A) Liners coding
B) Line coding
C) Digital coding
D) Binary coding

2. Which of the following is/are the characteristics of line coding.
i) signal level and data level  ii) DC component  iii) Pulse rate and bit rate  iv) self synchronization
A) i, ii and iii only
B) ii, iii and iv only
C) i, iii and iv only
D) All i, ii, iii and iv

3. Which of the following is/are the categories of line codes
i) Unipolar codes  ii) Non polar codes  iii) Bipolar codes  iv) Polar codes
A) i, ii and iii only
B) ii, iii and iv only
C) i, iii and iv only
D) All i, ii, iii and iv

4. ............... have only one voltage level other than zero, so the encoded signal will have either +A volts value or 0.
A) Unipolar codes
B) Bipolar codes
C) Non polar codes
D) Polar codes

5. ..................... uses two voltage levels other than zero such as +A/2 and -A/2 volts.
A) Unipolar codes
B) Bipolar codes
C) Non polar codes
D) Polar codes

6. In ..................... format, a logic 1 is represented by a pulse of full bit duration Tb and amplitude +A while a logic 0 is represented by an off pulse or zero amplitude.
A) Unipolar RZ
B) Unipolar NRZ
C) Polar RZ
D) Polar NRZ

7. ................... format shows that opposite polarity pulses of amplitude +-A/2 are used to represent logic 1 and 0. .
A) Unipolar RZ
B) Unipolar NRZ
C) Polar RZ
D) Polar NRZ

8. In ................... format, the successive 1s are represented by pulses with alternating polarity and no pulse is transmitted for a logic 0.
A) Unipolar RZ
B) Unipolar NRZ
C) Bipolar NRZ
D) Polar NRZ

9. An attractive feature of the .............. the absence of a dc component even through the input binary data may contain long string of 0s and 1s.
A) Bipolar format
B) Unipolar format
C) Split Phase Manchester format
D) Polar format

10. In ................... format, symbol 1 is represented by transmitting a positive pulse of +A/2 amplitude for one half of the symbol duration, followed by a negative pulse of amplitude -A/2 for remaining half of the symbol duration.
A) Bipolar
B) Unipolar
C) Split Phase Manchester
D) Polar

Read More »

MCQ Questions On Data Transmission Techniques Part-2

1. .................. means sending a digital signal over a channel without changing the digital signal to an analog signal.
A) Baseband transmission
B) Broadband transmission
C) Digital transmission
D) Analog transmission

2. In ...................... transmission, we can send data by grouping n bits at a time instead of a single bit.
A) parallel
B) serial
C) analog
D) digital

3. In ....................... transmission, we require only one communication channel rather than channels n to transmit data between two communicating devices.
A) parallel
B) serial
C) analog
D) digital

4. .................. is the loss of energy as the signal propagates outward, where the amount of energy depends on the frequency.
A) Noise
B) Delay distortion
C) Attenuation distortion
D) Dispersion

5. If the .................... is too much, the receiver may not be able to detect the signal at all or the signal may fall below the noise level.
A) Noise
B) Delay
C) Dispersion
D) Attenuation

6. Attenuation can be also expressed in decibel(dB) and commonly used because.
i) Signal strengths often fall off logarithmically
ii) Cascade losses and gains can be calculated with simple additions and subtractions
A) i only
B) ii only
C) Both of the above
D) None of the above

7. .................. occurs due to velocity of propagation the frequency varies. Thus various frequency components of a signal arrive at the receiver at different times.
A) Noise
B) Delay distortion
C) Attenuation distortion
D) Dispersion

8. .............. can be defined as unwanted energy from source other than the transmitter.
A) Dispersion
B) Attenuation Distortion
C) Delay distortion
D) Noise

9. ............... noise is caused by the random motion of the electrons in a wire and is avoidable.
A) Thermal
B) Intermodulation
C) Cross talk
D) Impulse

10. Thermal noise is often  referred to as ............... noise, because it affects uniformly the different frequencies.
A) Black
B) White
C) Gray
D) Blue

Read More »