JNTU Kakinada Updates | JNTU Kakinada CSE 4-1 Mid-1 Online Test Sample Questions | JNTUK Mid I online Test Papers
JNTUK MID-1 NETWORK PROGRAMMING
1.The TCP option used to prevent data corruption caused by old delayed or duplicated segments is__________.
a)Mss b)timestamp c)Window scale d)byte manipulation.
2.TCP sequences data by associating a ________with everybyte that it sends.
a)synchronous number b)sequence number c)assynchronous no d)socket no.
3.In TCP 3-way handshake min. no.of packets required are_____.
a)1 b)2 c)3 d)0.
4.IPV6 provides packet delivery service for_______.
a)TCP b)UDP c)SCTP d)ICMP.
5.A common way to describe the layers in a network.
a)ISO b)OSI c)MTUd)IP.
6.DLPI also provides access to _______layer.
a)physical b)datalink c)network d)transport.
7.TCP is a___protocol.
a)complex b)unreliable c)connection oriented d)both a and c
8.UDP is a ______protocol.[PR]
a)complex b)unreliable c)connection oriented d)both a and c
9.TCP establishes connection using ____way handshake and terminates using ___packet exchange.
a)3,4 b)2,3 c)4,3 d)3,2
10.___________ is diagnostic application that use ICMP.
a)PING b)RIP c)TELNET d)SUN RPC
11._____ protocol handles error and control information between routers and hosts.
a)SCTP b)ICMP c)IGMP d)ARP.
12.The client issues an active open by calling___________.
a)socket b)bind c)listen d)connect.
13.In TCP termination, the end that receives FIN performs _______.
a)active close b)passive close c)active open d)passive open.
14._______layer of OSI participates in end to end communication.
a)data link b)network c)transport d)physical.
15.The maximum size of an IPV4 datagram is ________.
a)65,535B b)64KB c)65,585B d)both a and b.
16.The smallest MTUin the path between two hosts is called______.
a)ethernet MTU b)path MTU c)wireless MTU d)link MTU.
17.______layers are present in a router .[@PR]
a)1 b)3 c)4 d)7.
18.The minimum link MTU for IPV4 is ________.
a)64B b)1280B c)68B d)1500B.
19.__________is not a part of a socket pair.
a)foreign IP address b)local port c)foreign port d)Sequence number.
20.___________is broadcast address.
a)0.0.0.0 b)1.1.1.1 c)255.255.255.255 d)both a&b.
21.A process sends messages into, and recives from, the network through its ____.
a)link adapter b)socket c)physical link d)datalink.
22.________layers are present in a switch.
a)1 b)2 c)3 d)7.
23.The version of the FAQ will only cover sockets of the_____family.
a)AF_UNIX b)AF_INET c)I_LINGER d)so_LINGER
24.Sockets are either______
a)connection less b)connection oriented c)both d)SIGPIPE
25.AF_UNIX is used for_____
a)UNIX IPC b)AF_INET c)FAQ d)AF_UNIX
26.shut down is useful for deliniating when you are done providing a request to a server by using_______
a)UDP b)TTCP c)TCP d)ARP
27.TCP guarantees all data transmitted when you close a socket,the server goes into a_______state
a)TIME_WAIT b)REQUEST_STATE c)RESPONSE_STATE d)TIME_DELAY
28.Instead of Berkeley_derived implementations normally used for_______
a)60 sec b)80 sec c)120 sec d)30 sec [@PR]
29.In both select() and poll() are being standardised by_________
a)BSD/OS 2.1 b)POSIX 1003.lg c)RFC 1014 d)4.4 BSD
30.Non_unix systems may not allow______on sockets
a)recv/send() b)get()/close() c)read()/write() d)send()/recv
31.A connection that has been closed by the one end to another ends TCP responds with an_____
a)RST b)FIN c)FQDN d)TTCP
32.In TCP’Out-of-bound’ data is called as_______
a)main data b)in_band data c)priority_data d)urgent_data
33.The practical upshot of the binding a port number<1024 is reserved to processes having an effective UID==________
a)node b)port c)root d)bind
34.______allows your server to bind to an address which is in a time_wait state
a)so_reuseport b)so_reuseaddr c)inaddr_any d)inport_any
35.If you get a_____,it will be followed by two more characters.
a)oxfb b)ox03 c)oxof3 d)oxff
36.on some stacks,apparently only those with multi cast support,i get duplicate incoming messages on the_____ socket.
a)INADDR_BROADCAST b)INADDR_ANY c)SO_REUSEADDR d)SO_REUSEPORT
37.____must be used to multicast messages at the same time
a)UDP b)TCP c)TTCP d)ICMP
38.UDP socket must be connected to receive_____ errors.
a)TCP b)IP c)ICMP d)IGMP
39.LINUX will return them on ____ sockets
a)connected b)inter connected c)un connected d)fully connected
40.TCP/IP implementations must support a minimum IP datagram size of _____ bytes
a)65516 b)556 c)65517 d)576
41.TCP or UDP port number are always stored in the structure in network_____order
a)bit b)byte c)char d)string
42.socket address structures are used only on a given_____
a)host b)client c)server d)port
43.The sockaddr_storage structure is defined by including the _____header.
a)#define SIN6_LEN b)in_addr_t c) d)
44.The socket address structures all contain a____byte length field.
a)256 b)2 c)1 d)232
45.Bind,connect and send to pass a socket address structure from the process to the_______
a)kernel b)o.s c)s/w d)h/w
46.The ifc_len member of the____ structure.
a)sysctl b)ifconf c)sock addr_un d)sock addr_in6
47.Byte ordering used by a given system as the ____byte order
a)client b)host c)server d)port
48.most internet standards use the term octet instead of byte to mean an ______quantity.
a)8 bit b)4 bit c)8 byte d)4 byte
49.Berkely_derived functions the only one we use in this text is______
a)ANSIC b)bcopy c)bcmp d)bzero
50.The ANSIC____function must be used when the fields overlap.
a)memset b)memmove c)memcpy d)memcmp
51.The strptr argument to____ cannot be a null pointer.
a)inet_pton b)inet_addrstrlen c)inet_ntop d)inet6_addrstrlen
52._____ is it requires the caller to pass a pointer to a binary address.
a)sock_ntop b)inet_ntop c)af_inet d)sock_bind_wild
53.Most TCP/IP implementations provide echo server using ______ protocol
A) TCP B) UDP C)both TCP, UDP D)ICMP
54._____ is used to read data from socket
A)read B)writen C)readline D)fgets
55.______ function is used to write data to standard o/p [@PR]
A)writen B) fputs C)fgets D)read
56.______ returns null pointer when it encounters EOF/error
A)fputs B)fgets C)read D)readline
57.fgets and fputs are used in _____ function
A)str_echo B)str_cli C)readline D)writen
58.If client & server are running on different hosts, then client host would display only _____socket
A)server parent
B)server child
C)client
D)both server sockets
59._____ command is uses to check status and relationships of processes
A)ps B)tcpserver01 C)netstat D)tcpcli01
60.PPID of child is _____
A)parent’s PID B)shell C)bash PPID D)PID of child
61.WCHAN column in ps command o/p shows tcp-data-wait condition when process is blocked in
A)accept B)socket i/p or output
C) terminal i/o D)connect
62.Terminal EOF character which terminates the client is
A)D B)S C)control+D D)Z
63._______ function terminates by calling exit
A)str_cli B)str_echo
C)child function D)client main function
64.When readline returns 0, str_echo function returns to
A)server child main B)client main
C)str_cli D)server main
65.____ signal is sent to server when server child enters Z state.
A)SIGKILL B)SIGCHLD C)SIGSTOP D)SIG_IGN
66.Signal that cannot be ignored by setting its disposition to SIG_IGN
A)SIGCHLD B)SIGKILL C)SIGSTO D)both b&c
67.When signal being caught is SIGALRM, then ____ is set
A)SA_RESTART B)SA_MASK
C)SA_HANDLER D)SA_INTERRUPPT
68._____ is set to empty set to mean that no additional signals are blocked other than signal being caught
A)SA_RESTART B)SA_MASK
C)SA_HANDLER D)SA_INTERRUPT
69._____ is used to selectively block and unblock a set of signals
A)SA_MASK B)SIGKILL
C)SIGSTOP D)SIGPROCMASK
70.Berkeley derived implementations never automatically restart _____ function
A)select B)accept C)recvfrom D)read
71._____ value of PID says to wait for first of our children to terminate in waitpid function
A)0 B)-1 C)1 D)-2
72._______ must be coded correctly using waitpid to prevent any Zombies from being left around
A)SIGCHLD B)SA_HANDLER
C)STR_CLI D)SA_INTERRUPT
73.When a process writes to socket that has received an RST, ______ signal is sent to process
A)SIGCHLD B)SIGPIPE
C)SIGKILL D)SIG_IGN
74.Assuming server host is crashed and if there were no responses at all to client’s data segment, then error is [@PR]
A)EHOSTUNREACH B)ECONNABORTED
C)ETIMEDOUT D)ENETUNREACH
75.Berkeley derived implementations retransmit data segments ____ times
A)13 B)10 C)11 D)12
76.Even if the client is no actively sending data, techniques used to detect crashing of server host is[@PR]
A)ECONNRESET B)SO_KEEPALIVE
C)WNOHANG D)ETIMEDOUT
77.When a UNIX system is shutdown, init process normally sends _____ signal to all processes first
A)SIGKILL B)SIGSTOP
C)SIGTERM D)SIGCHLD
78._____ function is used in our client to detect termination of server process as soon as it occur[@PR]
A)select B)poll C)both a & b D)accept
79.________ option must be specified in order to tell waitpid not to block if there are running children that have not yet terminated
A)ETIMEDOUT B)WNOHANG
C)SO_KEEPALIVE D)SIGTERM
80.POSIX way to establish the disposition of a signal is to call ____ function
A)signal B)SIG_INT C)sigaction D)SIG_DFL
81.UNIX signals are {@PRS}
A) Queued B)not queued C)stacked D)None
82.Which of the following is not a choice for the disposition of signal when sigaction function is called
A)SIG_IGN PR B)SIG_DFL
C)handler D)SIGCHLD
89.____________ is the process in which application sits in a loop calling “recvform” on a non blocking descriptor.
a) Select b) polling c) both d) blocking I/O
90. Error is returned instead of putting the process to sleep in ___Model
a) Blocking I/O b) Non blocking I/O
c) Signal driven I/O d) asynchronous I/O
91. The signal which is used to tell that descriptor is ready is ________
a) Select PR b)Ewould block c) SIGIO d) str-cli
92.For “wait forever” condition the time out pointer in the select function is declared as_________
a)always true PR b)always false c)zero d)null
93.The macro word void FD_CLR(int fd,fd_set *fdset) indicates ____
a)clear all bits in fd set b)turn on the bit for fd in fd set
c)turn off the bit for fd in fd set d)none
94.If a descriptor is not ready then all the bits in the descriptor are____
a)clear PR b)set to garbage value
c)set to initial value d)set to null value
95.A write operation on the socket will generate _____after the write half connection is closed
a)SO_RCVLOWAT b)SIGIO c)SIGPIPE d)str_cli
96.The operation of close depends on the value of _________[@PR]
a)STR_CLI b)SO_LINGER c)stdine of d)ping program
97.By default all sockets are_____
a)blocking b)Non-blocking c)synchronous d)asynchronous
98.The result testing of existing client connection by checking descriptors is returned by_____
a)str_cli b)poll c)select d)both b&c
99.The solution to the denial of service attack is_________
1)use Non-blocking I/O
2)identify the identity of client before accepting state
3)place a time out
a)only 3 b)both 1&2 c)both 1&3 d) all the above
100.The signal mask is used to ____
a)to test the global variables b)disable the delivery of certain signals
c)both 1&2 d)none
101.In poll ___________is considered priority band.
a)the presence of error b)TCP’s out of band data
c)regular TCP data d)all the above
102._______is called to wait for new connections or existing connection[@PR]
a)poll b)pselect c)select d)none
103.If the time out is INFTIM then it describes
a)wait for certain period b)wait for ever
c)return immediate d)none
104.__________function is the posix way to set a socket for non-blocking I/O
a)get sockopt b)setsockopt c)fcntl d)ioctl
105.________option in TCP gives detailed information about all the packets sent and received
a)SO_BROADCAST b)SO_DEBUG c)SO_LINGER d)SO_KEEPALIVE
106.______socket option specifies how the close function operates in connection oriented protocol
a)SO_CLOSE b)SO_LINGER c)SO_DEBUG d)none
107.In the function if close ,1_onoff=0 then its functionality will be__
a)no more receives on the socket
b)no more sends on the socket
c)descriptor reference will be -1
d)both a&b
108.Bandwidth delay product is [@PR]
a)bandwidth*RTT b)bandwidth*time to leave
c)both a&b d)none
109.The receive low_watermark and send low_watermark are used by
a)select b)poll c)pselect d)all
110.________allows a listening server to start and bind its well known port
a)SO_RCVLOAMAT b)SO_SNOLOWAT
c)SO_SNDTIMO d)SO_REUSEADDR
111.___is used with multicasting to allow some application to run many times on same host
a)so_RESUSEPORT’S completely duplicate binding
b)so_REUSEADDR completely duplicate binding
c)both a&b
d)none
112.___option specifies the receive IPv6 routing header is returned as ancillary data by recvmsg
a)IPv6_RTHDR b)IPv6_NEXTHOP c)IPv6_PKTINFO d)IPv6_HOPOPTS
113.________option specifies that any received IPv6 destination options are to be returned as ancillary data by recvmsg
a)IPv6_RTHDR b)IPv6_NEXTHOP c)IPv6_PKTINFO d)IPv6_DSTOPTS
114.____TCP option specifies the amount of time in seconds before a connection is closed
a)TCP_keepalive b)TCP_MAXRT c)TCP_MAXSEG d)TCP_NONDELAY
115.The common generator of smaller packet(s) is/are
a)Rlogin client b)TELNET client c)both a&b d)none
116._______option automatically terminates half open connection
a)SO_KEEPALIVE b)SO_LINGER c)SO_REUSEADDR d)none
117.Non-blocking I/O can be set using ______command
a)F_SETFLAG b)F_SETFL
c)f_SETOWN d)F_GETDOWN
118.If a socket creates a socket then
a)it has no owner
b)inherits the owner of the socket by which it is created
c)it has default owner d)none
JNTUK MID-1 NETWORK PROGRAMMING
1.The TCP option used to prevent data corruption caused by old delayed or duplicated segments is__________.
a)Mss b)timestamp c)Window scale d)byte manipulation.
2.TCP sequences data by associating a ________with everybyte that it sends.
a)synchronous number b)sequence number c)assynchronous no d)socket no.
3.In TCP 3-way handshake min. no.of packets required are_____.
a)1 b)2 c)3 d)0.
4.IPV6 provides packet delivery service for_______.
a)TCP b)UDP c)SCTP d)ICMP.
5.A common way to describe the layers in a network.
a)ISO b)OSI c)MTUd)IP.
6.DLPI also provides access to _______layer.
a)physical b)datalink c)network d)transport.
7.TCP is a___protocol.
a)complex b)unreliable c)connection oriented d)both a and c
8.UDP is a ______protocol.[PR]
a)complex b)unreliable c)connection oriented d)both a and c
9.TCP establishes connection using ____way handshake and terminates using ___packet exchange.
a)3,4 b)2,3 c)4,3 d)3,2
10.___________ is diagnostic application that use ICMP.
a)PING b)RIP c)TELNET d)SUN RPC
11._____ protocol handles error and control information between routers and hosts.
a)SCTP b)ICMP c)IGMP d)ARP.
12.The client issues an active open by calling___________.
a)socket b)bind c)listen d)connect.
13.In TCP termination, the end that receives FIN performs _______.
a)active close b)passive close c)active open d)passive open.
14._______layer of OSI participates in end to end communication.
a)data link b)network c)transport d)physical.
15.The maximum size of an IPV4 datagram is ________.
a)65,535B b)64KB c)65,585B d)both a and b.
16.The smallest MTUin the path between two hosts is called______.
a)ethernet MTU b)path MTU c)wireless MTU d)link MTU.
17.______layers are present in a router .[@PR]
a)1 b)3 c)4 d)7.
18.The minimum link MTU for IPV4 is ________.
a)64B b)1280B c)68B d)1500B.
19.__________is not a part of a socket pair.
a)foreign IP address b)local port c)foreign port d)Sequence number.
20.___________is broadcast address.
a)0.0.0.0 b)1.1.1.1 c)255.255.255.255 d)both a&b.
21.A process sends messages into, and recives from, the network through its ____.
a)link adapter b)socket c)physical link d)datalink.
22.________layers are present in a switch.
a)1 b)2 c)3 d)7.
23.The version of the FAQ will only cover sockets of the_____family.
a)AF_UNIX b)AF_INET c)I_LINGER d)so_LINGER
24.Sockets are either______
a)connection less b)connection oriented c)both d)SIGPIPE
25.AF_UNIX is used for_____
a)UNIX IPC b)AF_INET c)FAQ d)AF_UNIX
26.shut down is useful for deliniating when you are done providing a request to a server by using_______
a)UDP b)TTCP c)TCP d)ARP
27.TCP guarantees all data transmitted when you close a socket,the server goes into a_______state
a)TIME_WAIT b)REQUEST_STATE c)RESPONSE_STATE d)TIME_DELAY
28.Instead of Berkeley_derived implementations normally used for_______
a)60 sec b)80 sec c)120 sec d)30 sec [@PR]
29.In both select() and poll() are being standardised by_________
a)BSD/OS 2.1 b)POSIX 1003.lg c)RFC 1014 d)4.4 BSD
30.Non_unix systems may not allow______on sockets
a)recv/send() b)get()/close() c)read()/write() d)send()/recv
31.A connection that has been closed by the one end to another ends TCP responds with an_____
a)RST b)FIN c)FQDN d)TTCP
32.In TCP’Out-of-bound’ data is called as_______
a)main data b)in_band data c)priority_data d)urgent_data
33.The practical upshot of the binding a port number<1024 is reserved to processes having an effective UID==________
a)node b)port c)root d)bind
34.______allows your server to bind to an address which is in a time_wait state
a)so_reuseport b)so_reuseaddr c)inaddr_any d)inport_any
35.If you get a_____,it will be followed by two more characters.
a)oxfb b)ox03 c)oxof3 d)oxff
36.on some stacks,apparently only those with multi cast support,i get duplicate incoming messages on the_____ socket.
a)INADDR_BROADCAST b)INADDR_ANY c)SO_REUSEADDR d)SO_REUSEPORT
37.____must be used to multicast messages at the same time
a)UDP b)TCP c)TTCP d)ICMP
38.UDP socket must be connected to receive_____ errors.
a)TCP b)IP c)ICMP d)IGMP
39.LINUX will return them on ____ sockets
a)connected b)inter connected c)un connected d)fully connected
40.TCP/IP implementations must support a minimum IP datagram size of _____ bytes
a)65516 b)556 c)65517 d)576
41.TCP or UDP port number are always stored in the structure in network_____order
a)bit b)byte c)char d)string
42.socket address structures are used only on a given_____
a)host b)client c)server d)port
43.The sockaddr_storage structure is defined by including the _____header.
a)#define SIN6_LEN b)in_addr_t c)
44.The socket address structures all contain a____byte length field.
a)256 b)2 c)1 d)232
45.Bind,connect and send to pass a socket address structure from the process to the_______
a)kernel b)o.s c)s/w d)h/w
46.The ifc_len member of the____ structure.
a)sysctl b)ifconf c)sock addr_un d)sock addr_in6
47.Byte ordering used by a given system as the ____byte order
a)client b)host c)server d)port
48.most internet standards use the term octet instead of byte to mean an ______quantity.
a)8 bit b)4 bit c)8 byte d)4 byte
49.Berkely_derived functions the only one we use in this text is______
a)ANSIC b)bcopy c)bcmp d)bzero
50.The ANSIC____function must be used when the fields overlap.
a)memset b)memmove c)memcpy d)memcmp
51.The strptr argument to____ cannot be a null pointer.
a)inet_pton b)inet_addrstrlen c)inet_ntop d)inet6_addrstrlen
52._____ is it requires the caller to pass a pointer to a binary address.
a)sock_ntop b)inet_ntop c)af_inet d)sock_bind_wild
53.Most TCP/IP implementations provide echo server using ______ protocol
A) TCP B) UDP C)both TCP, UDP D)ICMP
54._____ is used to read data from socket
A)read B)writen C)readline D)fgets
55.______ function is used to write data to standard o/p [@PR]
A)writen B) fputs C)fgets D)read
56.______ returns null pointer when it encounters EOF/error
A)fputs B)fgets C)read D)readline
57.fgets and fputs are used in _____ function
A)str_echo B)str_cli C)readline D)writen
58.If client & server are running on different hosts, then client host would display only _____socket
A)server parent
B)server child
C)client
D)both server sockets
59._____ command is uses to check status and relationships of processes
A)ps B)tcpserver01 C)netstat D)tcpcli01
60.PPID of child is _____
A)parent’s PID B)shell C)bash PPID D)PID of child
61.WCHAN column in ps command o/p shows tcp-data-wait condition when process is blocked in
A)accept B)socket i/p or output
C) terminal i/o D)connect
62.Terminal EOF character which terminates the client is
A)D B)S C)control+D D)Z
63._______ function terminates by calling exit
A)str_cli B)str_echo
C)child function D)client main function
64.When readline returns 0, str_echo function returns to
A)server child main B)client main
C)str_cli D)server main
65.____ signal is sent to server when server child enters Z state.
A)SIGKILL B)SIGCHLD C)SIGSTOP D)SIG_IGN
66.Signal that cannot be ignored by setting its disposition to SIG_IGN
A)SIGCHLD B)SIGKILL C)SIGSTO D)both b&c
67.When signal being caught is SIGALRM, then ____ is set
A)SA_RESTART B)SA_MASK
C)SA_HANDLER D)SA_INTERRUPPT
68._____ is set to empty set to mean that no additional signals are blocked other than signal being caught
A)SA_RESTART B)SA_MASK
C)SA_HANDLER D)SA_INTERRUPT
69._____ is used to selectively block and unblock a set of signals
A)SA_MASK B)SIGKILL
C)SIGSTOP D)SIGPROCMASK
70.Berkeley derived implementations never automatically restart _____ function
A)select B)accept C)recvfrom D)read
71._____ value of PID says to wait for first of our children to terminate in waitpid function
A)0 B)-1 C)1 D)-2
72._______ must be coded correctly using waitpid to prevent any Zombies from being left around
A)SIGCHLD B)SA_HANDLER
C)STR_CLI D)SA_INTERRUPT
73.When a process writes to socket that has received an RST, ______ signal is sent to process
A)SIGCHLD B)SIGPIPE
C)SIGKILL D)SIG_IGN
74.Assuming server host is crashed and if there were no responses at all to client’s data segment, then error is [@PR]
A)EHOSTUNREACH B)ECONNABORTED
C)ETIMEDOUT D)ENETUNREACH
75.Berkeley derived implementations retransmit data segments ____ times
A)13 B)10 C)11 D)12
76.Even if the client is no actively sending data, techniques used to detect crashing of server host is[@PR]
A)ECONNRESET B)SO_KEEPALIVE
C)WNOHANG D)ETIMEDOUT
77.When a UNIX system is shutdown, init process normally sends _____ signal to all processes first
A)SIGKILL B)SIGSTOP
C)SIGTERM D)SIGCHLD
78._____ function is used in our client to detect termination of server process as soon as it occur[@PR]
A)select B)poll C)both a & b D)accept
79.________ option must be specified in order to tell waitpid not to block if there are running children that have not yet terminated
A)ETIMEDOUT B)WNOHANG
C)SO_KEEPALIVE D)SIGTERM
80.POSIX way to establish the disposition of a signal is to call ____ function
A)signal B)SIG_INT C)sigaction D)SIG_DFL
81.UNIX signals are {@PRS}
A) Queued B)not queued C)stacked D)None
82.Which of the following is not a choice for the disposition of signal when sigaction function is called
A)SIG_IGN PR B)SIG_DFL
C)handler D)SIGCHLD
89.____________ is the process in which application sits in a loop calling “recvform” on a non blocking descriptor.
a) Select b) polling c) both d) blocking I/O
90. Error is returned instead of putting the process to sleep in ___Model
a) Blocking I/O b) Non blocking I/O
c) Signal driven I/O d) asynchronous I/O
91. The signal which is used to tell that descriptor is ready is ________
a) Select PR b)Ewould block c) SIGIO d) str-cli
92.For “wait forever” condition the time out pointer in the select function is declared as_________
a)always true PR b)always false c)zero d)null
93.The macro word void FD_CLR(int fd,fd_set *fdset) indicates ____
a)clear all bits in fd set b)turn on the bit for fd in fd set
c)turn off the bit for fd in fd set d)none
94.If a descriptor is not ready then all the bits in the descriptor are____
a)clear PR b)set to garbage value
c)set to initial value d)set to null value
95.A write operation on the socket will generate _____after the write half connection is closed
a)SO_RCVLOWAT b)SIGIO c)SIGPIPE d)str_cli
96.The operation of close depends on the value of _________[@PR]
a)STR_CLI b)SO_LINGER c)stdine of d)ping program
97.By default all sockets are_____
a)blocking b)Non-blocking c)synchronous d)asynchronous
98.The result testing of existing client connection by checking descriptors is returned by_____
a)str_cli b)poll c)select d)both b&c
99.The solution to the denial of service attack is_________
1)use Non-blocking I/O
2)identify the identity of client before accepting state
3)place a time out
a)only 3 b)both 1&2 c)both 1&3 d) all the above
100.The signal mask is used to ____
a)to test the global variables b)disable the delivery of certain signals
c)both 1&2 d)none
101.In poll ___________is considered priority band.
a)the presence of error b)TCP’s out of band data
c)regular TCP data d)all the above
102._______is called to wait for new connections or existing connection[@PR]
a)poll b)pselect c)select d)none
103.If the time out is INFTIM then it describes
a)wait for certain period b)wait for ever
c)return immediate d)none
104.__________function is the posix way to set a socket for non-blocking I/O
a)get sockopt b)setsockopt c)fcntl d)ioctl
105.________option in TCP gives detailed information about all the packets sent and received
a)SO_BROADCAST b)SO_DEBUG c)SO_LINGER d)SO_KEEPALIVE
106.______socket option specifies how the close function operates in connection oriented protocol
a)SO_CLOSE b)SO_LINGER c)SO_DEBUG d)none
107.In the function if close ,1_onoff=0 then its functionality will be__
a)no more receives on the socket
b)no more sends on the socket
c)descriptor reference will be -1
d)both a&b
108.Bandwidth delay product is [@PR]
a)bandwidth*RTT b)bandwidth*time to leave
c)both a&b d)none
109.The receive low_watermark and send low_watermark are used by
a)select b)poll c)pselect d)all
110.________allows a listening server to start and bind its well known port
a)SO_RCVLOAMAT b)SO_SNOLOWAT
c)SO_SNDTIMO d)SO_REUSEADDR
111.___is used with multicasting to allow some application to run many times on same host
a)so_RESUSEPORT’S completely duplicate binding
b)so_REUSEADDR completely duplicate binding
c)both a&b
d)none
112.___option specifies the receive IPv6 routing header is returned as ancillary data by recvmsg
a)IPv6_RTHDR b)IPv6_NEXTHOP c)IPv6_PKTINFO d)IPv6_HOPOPTS
113.________option specifies that any received IPv6 destination options are to be returned as ancillary data by recvmsg
a)IPv6_RTHDR b)IPv6_NEXTHOP c)IPv6_PKTINFO d)IPv6_DSTOPTS
114.____TCP option specifies the amount of time in seconds before a connection is closed
a)TCP_keepalive b)TCP_MAXRT c)TCP_MAXSEG d)TCP_NONDELAY
115.The common generator of smaller packet(s) is/are
a)Rlogin client b)TELNET client c)both a&b d)none
116._______option automatically terminates half open connection
a)SO_KEEPALIVE b)SO_LINGER c)SO_REUSEADDR d)none
117.Non-blocking I/O can be set using ______command
a)F_SETFLAG b)F_SETFL
c)f_SETOWN d)F_GETDOWN
118.If a socket creates a socket then
a)it has no owner
b)inherits the owner of the socket by which it is created
c)it has default owner d)none
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