Computer interview questions – page 37

The residual error rate is the

1. A.Probability that one or more errors will be detected when an error detection mechanism is used
2. B.Signal to noise ratio divided by the ratio of energy per bit to noise per hertz
3. C.Number of bit errors per twenty four hours of continuous operation on an asynchronous line
4. D.Probability that one or more errors will be undetected when an error detection scheme is used

Which of the following protocol allows an application program on one machine to send a datagram to an application program on another machine?

1. A.SMTP
2. B.VMTP
3. C.X.25
4. D.UDP

Satellite switched Time-Division multiple Access (SS/TDMN) is

1. A.A form of TDMA in which act switching is used to dynamically change the channel assignments
2. B.A medium access control technique for multiple access transmission media
3. C.Method of determining which device has access to the transmission medium at any time
4. D.All of these

Which of the following device is used with an X.25 network to provide service to asynchronous terminals?

1. A.Packet assembled
2. B.Gateway
3. C.Bridges
4. D.Repeater

How many digits of the DNIC (Data network identification code) identify the country?

1. A.First three
2. B.First four
3. C.First five
4. D.First six

Pure ALOHA

1. A.Require global time synchronization
2. B.Does not require global time synchronization
3. C.Both (a) and (b)
4. D.None of these

Simple network management protocol (SNMP) is implemented with a daughter board in the

1. A.Separate PC that manages the network
2. B.Hubs
3. C.Server
4. D.Nodes

Number of channels on which different operations can occur simultaneously on one ISDN basic access line is

1. A.1
2. B.2
3. C.3
4. D.5

A basic technique for isolating data communications faults is

1. A.Simulating the system on a special purpose compute
2. B.Calling the DTE service department
3. C.Calling the telephone company
4. D.Performing a loopback test

Which of the following is not a class of LAN?

1. A.Token bus
2. B.CSMA/CD
3. C.Broad band
4. D.All of these

CSMA/CD is

1. A.An important protocol
2. B.IEEE 802.3 (Ethernet)
3. C.Both (a) and (b)
4. D.None of these

If a class B network on the internet has a subnet mask of 255.255.248.0, what is the maximum number of hosts per subnet?

1. A.2046
2. B.2047
3. C.1022
4. D.1023

HTML (Hyper Text Markup Language) has language elements which permit certain actions other than describing the structure of the web document. Which one of the following actions is NOT supported by pure HTML (without any server or client side scripting) pages?

1. A.Display the client time as part of the page
2. B.Automatically redirect to another page upon download
3. C.Refresh the page automatically after a specified interval
4. D.Embed web objects from different sites into the same page

An example of a protocol converter counter value is

1. A.ACK/NAK count
2. B.ACK/NAK delay
3. C.Bit delay
4. D.Data rate

In X.25 network layer protocol, the data packets normally contain

1. A.One octet of header plus data
2. B.Two octets of header plus data
3. C.Three octets of header plus data
4. D.Four octets of header plus data

Local area networks can transmit

1. A.Faster than telecommunication over public telephone lines
2. B.Slower than telecommunication over public telephone lines
3. C.Using twisted-pair wiring or coaxial cables
4. D.Both (a) and (c)

Carrier is

1. A.A collection of interconnected functional units that provides a data communications service among stations to the network
2. B.The condition when two or more sections attempt to use the same channel at the same time
3. C.A continuous frequency capable of being modulated or impressed with a second signal
4. D.One or more conductors that serve as a common connection for a related group of devices

RS-232-C

1. A.is an interface standard between data terminal equipment and data circuit terminating equipment
2. B.specifies only the mechanical characteristics of an interface by providing a 25-pin connector
3. C.is an interface between two data circuit terminating equipment as exemplified by a local and remote modem
4. D.requires only 7 pin out of 25 in order to transmit digital data over public telephone lines

Many low-speed channels are interwoven into one high-speed transmission by

1. A.Frequency-division multiplexer
2. B.Time-division multiplexer
3. C.Both (a) and (b)
4. D.None of these

What is the name of the computer based EMMS that provides a common forum where users can check it at their convenience, post message, activity exchange ideas and participate in ongoing discussions?

1. A.Video conferencing
2. B.Tele conferencing
3. C.Bulletin Board system (BBS)
4. D.E-mail

How does packet Burst affect network performance?

1. A.It helps in secure communication
2. B.It helps in error control
3. C.It increases network bandwidth
4. D.It increases speed at which packets are distributed

The main purpose of a data link content monitor is to

1. A.Detect problems in protocols
2. B.Measure bit error rates
3. C.Determine the type of transmission used in a data link
4. D.Determine the type of switching used in a data link

Most sophisticated type of data communications test equipment is

1. A.Breakout box
2. B.DTE
3. C.Protocol analyzer
4. D.Simulator

Which of the following protocol a diskless machine uses to obtain its IP address from a server?

1. A.RARP
2. B.RIP
3. C.RDP
4. D.X.25

The OSPF protocol

1. A.has the ability to discover a network’s specific topology
2. B.is a link-state route discovery protocol
3. C.provides better performance than RIP in large internet-works
4. D.all of these

Which backup procedure is the least time consuming?

1. A.Weekly full backup and daily incremental backup
2. B.Daily full backup and weekly differential backup
3. C.Weekly full backup and daily differential backup
4. D.Daily full backup and daily weekly incremental backup

Which of the following functionalities must be implemented by a transport protocol over and above the network protocol?

1. A.End to end connectivity
2. B.Packet delivery in the correct order
3. C.Detection of duplicate packets
4. D.Recovery from packet losses

An organization has a class B network and wishes to form subnets for 64 departments. The subnet mask would be

1. A.255.255.252.0
2. B.255.255.128.0
3. C.255.255.64.0
4. D.255.255.0.0

Two computers that communicate with each other use a simple parity check to detect errors for ASCII transmissions. Which of the following events will always lead to an undetected error?

1. A.Two bits or any even number of bits inverted in a byte during transmission
2. B.One bit or any odd number of bits inverted in a byte during transmission
3. C.Two bits or any even number of bits inverted in a block during transmission
4. D.One bit or any odd number of bits inverted in a block of data during transmission

The network operating system that does not support symmetric multi-processing (SMP) is

1. A.Banyan (VINES)
2. B.Novell network 3.X
3. C.SCO unix
4. D.Microsoft NT advanced server