McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Master of Computer Applications (MCA) , Programming Languages .
Chapters
| 151. |
Signals can be sent |
| A. | By process itself |
| B. | By one process to another process |
| C. | By the Kernel to a process |
| D. | By (a),(b) and (c) |
| Answer» D. By (a),(b) and (c) | |
| 152. |
Similar to read and write system calls |
| A. | Send |
| B. | Recv |
| C. | (a) and (b) both |
| D. | None |
| Answer» C. (a) and (b) both | |
| 153. |
NetBIOS is |
| A. | Session Service |
| B. | Datagram service |
| C. | General Commands |
| D. | None |
| Answer» A. Session Service | |
| 154. |
UDP stands for |
| A. | User datagram Protocol |
| B. | Uninterrupted data part |
| C. | Uniform data provider |
| D. | None |
| Answer» A. User datagram Protocol | |
| 155. |
TCP stands for |
| A. | Transmission Control protocol |
| B. | Transfer Control protocol |
| C. | Termination control protocol |
| D. | None |
| Answer» A. Transmission Control protocol | |
| 156. |
How to identify a communication? |
| A. | Source IP Address |
| B. | Source Port Number |
| C. | Destination IP Address |
| D. | All the above |
| Answer» D. All the above | |
| 157. |
The physical layer of a network |
| A. | constructs packets of data and sends them across the network |
| B. | controls error detection and correction |
| C. | defines the electrical characteristics of signals passed between the computer and communication devices |
| D. | All of the above |
| Answer» C. defines the electrical characteristics of signals passed between the computer and communication devices | |
| 158. |
What TCP/IP protocol is used for remote terminal connection service? |
| A. | UDP |
| B. | RARP |
| C. | FTP |
| D. | TELENET |
| Answer» D. TELENET | |
| 159. |
How many networks and nodes per network, are allowed by the Class B network? |
| A. | 127 networks and 16,777,216 nodes per network |
| B. | 16,384 networks and 65,534 nodes per network |
| C. | 2,097,152 networks and 254 nodes per network |
| D. | All of the above |
| Answer» B. 16,384 networks and 65,534 nodes per network | |
| 160. |
What service is used to translate domain names to IP addresses? |
| A. | NFS |
| B. | SMB |
| C. | NIS |
| D. | DNS |
| Answer» D. DNS | |
| 161. |
What TCP/IP protocol is used for file transfer with minimal capability and minimal overhead? |
| A. | TELNET |
| B. | TFTP |
| C. | FTP |
| D. | RARP |
| Answer» B. TFTP | |
| 162. |
What TCP/IP protocol is used for transferring electronic mail messages from one machine to another? |
| A. | FTP |
| B. | SNMP |
| C. | SMTP |
| D. | RPC |
| Answer» C. SMTP | |
| 163. |
What can he used to set up a firewall on a Linux system? |
| A. | netstat |
| B. | route |
| C. | trace |
| D. | ipchains |
| Answer» D. ipchains | |
| 164. |
What service is not monitored by inetd ? |
| A. | SSH |
| B. | time |
| C. | ntalk |
| D. | finger |
| Answer» A. SSH | |
| 165. |
What command do you use to add routes to a Linux router? |
| A. | addroute |
| B. | route |
| C. | netstat |
| D. | net |
| Answer» B. route | |
| 166. |
Which of the following is not a communication command? |
| A. | grep |
| B. | |
| C. | mesg |
| D. | Write |
| Answer» A. grep | |
| 167. |
What protocol(s) is (are) allowed a user to retrieve her/his mail from the mail server to her/his mail reader? |
| A. | POP3 |
| B. | FTP |
| C. | MAP |
| D. | All of the above |
| Answer» A. POP3 | |
| 168. |
The 32-bit internet address 10000000 00001010 00000010 00011110 will be written in dotted decimal notation as |
| A. | 128.10.2.30 |
| B. | 210.20.2.64 |
| C. | 164.100.9.61 |
| D. | 148.20.2.30 |
| Answer» A. 128.10.2.30 | |
| 169. |
Which class network is used for a collection of a small number of networks with a large number of nodes? |
| A. | Class A |
| B. | Class B |
| C. | Class C |
| D. | All of the above |
| Answer» A. Class A | |
| 170. |
What type of addressing format is used by Class A network? |
| A. | Net.Net.Net.Node |
| B. | Net.Net.Node.Node |
| C. | Net.Node.Net.Node |
| D. | Net.Node.Node.Node |
| Answer» D. Net.Node.Node.Node | |
| 171. |
How many class A, B and C network IDs can exist? |
| A. | 128 |
| B. | 126 |
| C. | 16,382 |
| D. | 2,113,658 |
| Answer» D. 2,113,658 | |
| 172. |
Communication using UDP is usually____________. |
| A. | connectionless,iterative |
| B. | connectionless,concurrent |
| C. | connection-oriented,iterative |
| D. | connection-oriented,concurrent |
| Answer» A. connectionless,iterative | |
| 173. |
Communication using TCP is usually____________. |
| A. | connectionless,iterative |
| B. | connectionless,concurrent |
| C. | connection-oriented,iterative |
| D. | connection-oriented,concurrent |
| Answer» D. connection-oriented,concurrent | |
| 174. |
SOCK_STREAM sockets are used by ______ processes. |
| A. | UDP |
| B. | TCP |
| C. | SCTP |
| D. | None of these |
| Answer» B. TCP | |
| 175. |
SOCK_DGRAM sockets are used by ______ processes. |
| A. | UDP |
| B. | TCP |
| C. | SCTP |
| D. | None of these |
| Answer» A. UDP | |
| 176. |
An interface is a set of ___________ designed to facilitate interaction between two entities |
| A. | programs |
| B. | instructions |
| C. | rules |
| D. | none of these |
| Answer» B. instructions | |
| 177. |
How many types of sockets are there? |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 178. |
If a signal is received by a process, when will it be processed? |
| A. | It is processed immediately |
| B. | It is processed when process is switching to kernel mode |
| C. | It is processed in the next time slice given to the process |
| D. | all |
| Answer» B. It is processed when process is switching to kernel mode | |
| 179. |
Which signal is generated when we press control-C? |
| A. | SIGINT |
| B. | SIGTERM |
| C. | SIGKILL |
| D. | SIGSEGV |
| Answer» A. SIGINT | |
| 180. |
Which signal is generated when we press ctrl-Z? |
| A. | SIGKILL |
| B. | SIGSTOP |
| C. | SIGABRT |
| D. | SIGINT |
| Answer» D. SIGINT | |
| 181. |
Which signal is sent when the Child process terminates? |
| A. | SIGINIT |
| B. | SIGKILL |
| C. | SIGSTOP |
| D. | SIGCHLD |
| Answer» B. SIGKILL | |
| 182. |
Which of the following signal cannot be handled or ignored? |
| A. | SIGINT |
| B. | SIGCHLD |
| C. | SIGKILL |
| D. | SIGALRM |
| Answer» C. SIGKILL | |
| 183. |
Another signal that cannot be caught is: |
| A. | SIGPIPE |
| B. | SIGHUP |
| C. | SIGSTOP |
| D. | SIGUSR1 |
| Answer» C. SIGSTOP | |
| 184. |
When real interval timer expires which signal is generated? |
| A. | SIGINT |
| B. | SIGCHLD |
| C. | SIGKILL |
| D. | SIGALRM |
| Answer» D. SIGALRM | |
| 185. |
Signals are handled using which system call? |
| A. | kill |
| B. | signal |
| C. | both |
| D. | none |
| Answer» B. signal | |
| 186. |
Default action of SIGSEGV is |
| A. | Terminate |
| B. | Core dump |
| C. | Stop |
| D. | Cont |
| Answer» B. Core dump | |
| 187. |
The kill system call is used to |
| A. | Send shutdown messages to all by super-user |
| B. | Send a signal to a process |
| C. | Kill processes |
| D. | Stop the processes |
| Answer» B. Send a signal to a process | |
| 188. |
Which is true regarding pipes? |
| A. | half duplex |
| B. | full duplex |
| C. | message boundaries are preserved |
| D. | Unordered data |
| Answer» A. half duplex | |
| 189. |
The persistancy of a FIFO is |
| A. | process |
| B. | kernel |
| C. | file system |
| D. | none |
| Answer» C. file system | |
| 190. |
Advantage of FIFO over pipe is |
| A. | related processes can communicate |
| B. | unrelated processes can communicate |
| C. | none |
| D. | all |
| Answer» B. unrelated processes can communicate | |
| 191. |
What mkfifo() creats? |
| A. | pipe |
| B. | unnamed pipe |
| C. | named pipe |
| D. | msg queue |
| Answer» C. named pipe | |
| 192. |
System V IPC common attributes are |
| A. | key |
| B. | id |
| C. | owner |
| D. | all the above |
| Answer» D. all the above | |
| 193. |
Which one of the following is not system V IPC ? |
| A. | Shared Memory |
| B. | Semaphores |
| C. | FIFO |
| D. | Message Queues |
| Answer» C. FIFO | |
| 194. |
Which system call is used to create Sys V message Queue ? |
| A. | msgget |
| B. | shemget |
| C. | semget |
| D. | msgctl |
| Answer» A. msgget | |
| 195. |
Which is not the correct option for removing a message queue ? |
| A. | ipcrm -Q |
| B. | ipcrm -q |
| C. | ipcrm -m |
| D. | None |
| Answer» C. ipcrm -m | |
| 196. |
Message queues are created in |
| A. | userspace |
| B. | kernelspace |
| C. | both |
| D. | none |
| Answer» B. kernelspace | |
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