McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Computer Science Engineering (CSE) .
| 251. |
The key features of the SCSI BUS are |
| A. | the cost effective connective media |
| B. | the ability overlap data transfer requests |
| C. | the highly efficient data transmission |
| D. | none of the mentioned |
| Answer» B. the ability overlap data transfer requests | |
| Explanation: the scsi bus can overlap various data transfer requests by the devices. | |
| 252. |
In a data transfer operation involving SCSI BUS, the control is with |
| A. | initiator |
| B. | target |
| C. | scsi controller |
| D. | target controller |
| Answer» D. target controller | |
| Explanation: the initiator involves in the arbitration process and after winning the bus it’ll hand over the control to the target controller. | |
| 253. |
In SCSI transfers the processor is not aware of the data being transferred. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: the processor or the controller is unaware of the data being transferred. | |
| 254. |
What is DB(P) line? |
| A. | that the data line is carrying the device information |
| B. | that the data line is carrying the parity information |
| C. | that the data line is partly closed |
| D. | that the data line is temporarily occupied |
| Answer» B. that the data line is carrying the parity information | |
| Explanation: none. | |
| 255. |
The BSY signal signifies |
| A. | the bus is busy |
| B. | the controller is busy |
| C. | the initiator is busy |
| D. | the target is busy |
| Answer» A. the bus is busy | |
| Explanation: this signal is generally initiated when the bus is currently occupied in an operation. | |
| 256. |
The SEL signal signifies |
| A. | the initiator is selected |
| B. | the device for bus control is selected |
| C. | that the target is being selected |
| D. | none of the mentioned |
| Answer» B. the device for bus control is selected | |
| Explanation: this signal is usually asserted during the selection or reselection process. | |
| 257. |
signal is asserted when the initiator wishes to send a message to the target. |
| A. | msg |
| B. | app |
| C. | sms |
| D. | atn |
| Answer» D. atn | |
| Explanation: the atn signal is short for attention, which is used to intimate the target that the initiator sent a message to it. | |
| 258. |
The MSG signal is used |
| A. | to send a message to the target |
| B. | to receive a message from the mailbox |
| C. | to tell that the information being sent is a message |
| D. | none of the mentioned |
| Answer» C. to tell that the information being sent is a message | |
| Explanation: none. | |
| 259. |
is used to reset all the device controls to their startup state. |
| A. | srt |
| B. | rst |
| C. | atn |
| D. | none of the mentioned |
| Answer» B. rst | |
| Explanation: none. | |
| 260. |
SCSI stands for |
| A. | small computer system interface |
| B. | switch computer system interface |
| C. | small component system interface |
| D. | none of the mentioned |
| Answer» A. small computer system interface | |
| Explanation: the scsi bus is one of the expansion buses used in a system. | |
| 261. |
ANSI stands for |
| A. | american national system interface |
| B. | ascii national standard interface |
| C. | american network system interface |
| D. | american national standard institute |
| Answer» D. american national standard institute | |
| Explanation: this a standard for designing buses and other system components. | |
| 262. |
A narrow SCSI BUS has data lines. |
| A. | 6 |
| B. | 8 |
| C. | 16 |
| D. | 4 |
| Answer» B. 8 | |
| Explanation: the scsi bus which is narrow is capable of transferring 8 bits of data at a time. | |
| 263. |
HVD stands for |
| A. | high voltage differential |
| B. | high voltage density |
| C. | high video definition |
| D. | none of the mentioned |
| Answer» A. high voltage differential | |
| Explanation: this is a type of signaling which uses 5v of current. | |
| 264. |
For better transfer rates on the SCSI BUS the length of the cable is limited to |
| A. | 2m |
| B. | 4m |
| C. | 1.3m |
| D. | 1.6m |
| Answer» D. 1.6m | |
| Explanation: to increase the transmission rate in scsi in se mode of transfer the wire length is restricted to 1.6m. | |
| 265. |
The mode of data transfer used by the controller is |
| A. | interrupt |
| B. | dma |
| C. | asynchronous |
| D. | synchronous |
| Answer» B. dma | |
| Explanation: none. | |
| 266. |
The data is stored on the disk in the form of blocks called |
| A. | pages |
| B. | frames |
| C. | sectors |
| D. | tables |
| Answer» C. sectors | |
| Explanation: the data is stored on the disk in the form of a collection of blocks called as sectors. | |
| 267. |
The high speed mode of operation of the USB was introduced by |
| A. | isa |
| B. | usb 3.0 |
| C. | usb 2.0 |
| D. | ansi |
| Answer» C. usb 2.0 | |
| Explanation: the high-speed mode of operation was introduced with usb 2.0, which enabled the usb to operate at 480 mb/s. | |
| 268. |
The sampling process in speaker output is a process. |
| A. | asynchronous |
| B. | synchronous |
| C. | isochronous |
| D. | none of the mentioned |
| Answer» C. isochronous | |
| Explanation: the isochronous process means each bit of data is separated by a time interval. | |
| 269. |
The I/O devices form the of the tree structure. |
| A. | leaves |
| B. | subordinate roots |
| C. | left subtrees |
| D. | right subtrees |
| Answer» A. leaves | |
| Explanation: the i/o devices form the leaves of the structure. | |
| 270. |
USB is a parallel mode of transmission of data and this enables for the fast speeds of data transfers. |
| A. | true |
| B. | false |
| Answer» B. false | |
| Explanation: the usb does a serial mode of data transfer. | |
| 271. |
In USB the devices can communicate with each other. |
| A. | true |
| B. | false |
| Answer» B. false | |
| Explanation: it allows only the host to communicate with the devices and not between themselves. | |
| 272. |
The device can send a message to the host by taking part in for the communication path. |
| A. | arbitration |
| B. | polling |
| C. | prioritizing |
| D. | none of the mentioned |
| Answer» B. polling | |
| Explanation: none. | |
| 273. |
When the USB is connected to a system, its root hub is connected to the |
| A. | pci bus |
| B. | scsi bus |
| C. | processor bus |
| D. | ide |
| Answer» C. processor bus | |
| Explanation: the usb’s root is connected to the processor directly using the bus. | |
| 274. |
The devices connected to USB is assigned a address. |
| A. | 9 bit |
| B. | 16 bit |
| C. | 4 bit |
| D. | 7 bit |
| Answer» D. 7 bit | |
| Explanation: to make it easier for recognition the devices are given 7 bit addresses. | |
| 275. |
The USB address space can be shared by the user’s memory space. |
| A. | true |
| B. | false |
| Answer» B. false | |
| Explanation: the usb memory space is not under any address spaces and cannot be accessed. | |
| 276. |
Locations in the device to or from which data transfers can take place is called |
| A. | end points |
| B. | hosts |
| C. | source |
| D. | none of the mentioned |
| Answer» A. end points | |
| Explanation: none. | |
| 277. |
A USB pipe is a channel. |
| A. | simplex |
| B. | half-duplex |
| C. | full-duplex |
| D. | both simplex and full-duplex |
| Answer» C. full-duplex | |
| Explanation: this means that the pipe is bi-directional in sending messages or information. | |
| 278. |
The type/s of packets sent by the USB is/are |
| A. | data |
| B. | address |
| C. | control |
| D. | both data and control |
| Answer» D. both data and control | |
| Explanation: this means that the usb gets both data and control signals required for the transfer operation. | |
| 279. |
The first field of any packet is |
| A. | pid |
| B. | addr |
| C. | endp |
| D. | crc16 |
| Answer» A. pid | |
| Explanation: the pid is the field that is used to identify the device (the device id). | |
| 280. |
The 4 bit PID’s are transmitted twice. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: the fields are transmitted twice, once with the true values and the second time with the complemented values. | |
| 281. |
The last field in the packet is |
| A. | pid |
| B. | addr |
| C. | endp |
| D. | crc |
| Answer» D. crc | |
| Explanation: the last 5 bits of the packet is used for error checking, that is cyclic redundancy check. | |
| 282. |
The CRC bits are computed based on the values of the |
| A. | pid |
| B. | addr |
| C. | endp |
| D. | both addr and endp |
| Answer» D. both addr and endp | |
| Explanation: the crc bits are calculated based on the values of the address and endp. | |
| 283. |
The data packets can contain data upto |
| A. | 512 bytes |
| B. | 256 bytes |
| C. | 1024 bytes |
| D. | 2 kb |
| Answer» C. 1024 bytes | |
| Explanation: none. | |
| 284. |
The signal is used to indicate the beginning of a new frame. |
| A. | start |
| B. | sof |
| C. | beg |
| D. | none of the mentioned |
| Answer» B. sof | |
| Explanation: the sof(state of frame) is used to indicate the beginning of a new frame. | |
| 285. |
The SOF is transmitted every |
| A. | 1s |
| B. | 5s |
| C. | 1ms |
| D. | 1us |
| Answer» C. 1ms | |
| Explanation: none. | |
| 286. |
The logic operations are simpler to implement using logic circuits. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: the logic operation includes and, or, xor etc. | |
| 287. |
The logic operations are implemented using circuits. |
| A. | bridge |
| B. | logical |
| C. | combinatorial |
| D. | gate |
| Answer» C. combinatorial | |
| Explanation: the combinatorial circuits means, using the basic universal gates. | |
| 288. |
In full adders the sum circuit is implemented using |
| A. | and & or gates |
| B. | nand gate |
| C. | xor |
| D. | xnor |
| Answer» C. xor | |
| Explanation: sum = a ^ b ^ c (‘^’ indicates xor operation). | |
| 289. |
The usual implementation of the carry circuit involves |
| A. | and & or gates |
| B. | xor |
| C. | nand |
| D. | xnor |
| Answer» B. xor | |
| Explanation: in case of full and half adders this method is used. | |
| 290. |
A gate is used to detect the occurrence of an overflow. |
| A. | nand |
| B. | xor |
| C. | xnor |
| D. | and |
| Answer» B. xor | |
| Explanation: the overflow is detected by cn^cn-1 (‘^’ indicates xor operation). | |
| 291. |
The delay reduced to in the carry look ahead adder is |
| A. | 5 |
| B. | 8 |
| C. | 10 |
| D. | 2n |
| Answer» A. 5 | |
| Explanation: none. | |
| 292. |
The product of 1101 & 1011 is |
| A. | 10001111 |
| B. | 10101010 |
| C. | 11110000 |
| D. | 11001100 |
| Answer» A. 10001111 | |
| Explanation: the above operation is performed using binary multiplication. | |
| 293. |
The is used to coordinate the operation of the multiplier. |
| A. | controller |
| B. | coordinator |
| C. | control sequencer |
| D. | none of the mentioned |
| Answer» C. control sequencer | |
| Explanation: this performs the required sequencing of the various parts of the circuit. | |
| 294. |
The multiplicand and the control signals are passed through to the n-bit adder via |
| A. | mux |
| B. | demux |
| C. | encoder |
| D. | decoder |
| Answer» A. mux | |
| Explanation: none. | |
| 295. |
The method used to reduce the maximum number of summands by half is |
| A. | fast multiplication |
| B. | bit-pair recording |
| C. | quick multiplication |
| D. | none of the mentioned |
| Answer» B. bit-pair recording | |
| Explanation: it reduces the number of summands by concatenating them. | |
| 296. |
The multiplier -6(11010) is recorded as |
| A. | 0-1-2 |
| B. | 0-1+1-10 |
| C. | -2-10 |
| D. | none of the mentioned |
| Answer» A. 0-1-2 | |
| Explanation: none. | |
| 297. |
CSA stands for? |
| A. | computer speed addition |
| B. | carry save addition |
| C. | computer service architecture |
| D. | none of the mentioned |
| Answer» A. computer speed addition | |
| Explanation: the csa is used to speed up the addition of multiplicands. | |
| 298. |
The decimal numbers represented in the computer are called as floating point numbers, as the decimal point floats through the number. |
| A. | true |
| B. | false |
| Answer» A. true | |
| Explanation: by doing this the computer is capable of accommodating the large float numbers also. | |
| 299. |
The numbers written to the power of 10 in the representation of decimal numbers are called as |
| A. | height factors |
| B. | size factors |
| C. | scale factors |
| D. | none of the mentioned |
| Answer» C. scale factors | |
| Explanation: these are called as scale factors cause they’re responsible in determining the degree of specification of a number. | |
| 300. |
If the decimal point is placed to the right of the first significant digit, then the number is called |
| A. | orthogonal |
| B. | normalized |
| C. | determinate |
| D. | none of the mentioned |
| Answer» B. normalized | |
| Explanation: none. | |
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