One word Substitution of " Put off for a future time ?->(Show Answer!)

1. One word Substitution of " Put off for a future time

Answer: Postpone/ procrastinate

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MCQ-> Study the following information carefully and answer the questions given below :Seven people N, K, T, B, M, W and R have their weekly offs on different days of the week i.e. Sunday, Monday, Tuesday, Wednesday, Thursday, Friday and Saturday not necessarily in that order. Each of them has a liking for different cuisine i.e. Indian, Italian, Mexican, Chinese, Spanish, Continental and Thai, not necessarily in that order. K likes Thai food and gets his weekly off on Thursday. B likes Italian food and does not have off on Sunday. M has weekly off on Saturday and R has his weekly off on Tuesday. W likes continental food whereas the one who has weekly off on Monday likes Mexicancuisine. T does not like Spanish cuisine and has weekly off on Wednesday. The one who likes Indian food does not have a weekly off on Tuesday or Wednesday.Who has a weekly off on Friday ?
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MCQ-> In a modern computer, electronic and magnetic storage technologies play complementary roles. Electronic memory chips are fast but volatile (their contents are lost when the computer is unplugged). Magnetic tapes and hard disks are slower, but have the advantage that they are non-volatile, so that they can be used to store software and documents even when the power is off.In laboratories around the world, however, researchers are hoping to achieve the best of both worlds. They are trying to build magnetic memory chips that could be used in place of today’s electronics. These magnetic memories would be nonvolatile; but they would also he faster, would consume less power, and would be able to stand up to hazardous environments more easily. Such chips would have obvious applications in storage cards for digital cameras and music- players; they would enable handheld and laptop computers to boot up more quickly and to operate for longer; they would allow desktop computers to run faster; they would doubtless have military and space-faring advantages too. But although the theory behind them looks solid, there are tricky practical problems and need to be overcome.Two different approaches, based on different magnetic phenomena, are being pursued. The first, being investigated by Gary Prinz and his colleagues at the Naval Research Laboratory (NRL) in Washington, D.c), exploits the fact that the electrical resistance of some materials changes in the presence of magnetic field— a phenomenon known as magneto- resistance. For some multi-layered materials this effect is particularly powerful and is, accordingly, called “giant” magneto-resistance (GMR). Since 1997, the exploitation of GMR has made cheap multi-gigabyte hard disks commonplace. The magnetic orientations of the magnetised spots on the surface of a spinning disk are detected by measuring the changes they induce in the resistance of a tiny sensor. This technique is so sensitive that it means the spots can be made smaller and packed closer together than was previously possible, thus increasing the capacity and reducing the size and cost of a disk drive. Dr. Prinz and his colleagues are now exploiting the same phenomenon on the surface of memory chips, rather spinning disks. In a conventional memory chip, each binary digit (bit) of data is represented using a capacitor-reservoir of electrical charge that is either empty or fill -to represent a zero or a one. In the NRL’s magnetic design, by contrast, each bit is stored in a magnetic element in the form of a vertical pillar of magnetisable material. A matrix of wires passing above and below the elements allows each to be magnetised, either clockwise or anti-clockwise, to represent zero or one. Another set of wires allows current to pass through any particular element. By measuring an element’s resistance you can determine its magnetic orientation, and hence whether it is storing a zero or a one. Since the elements retain their magnetic orientation even when the power is off, the result is non-volatile memory. Unlike the elements of an electronic memory, a magnetic memory’s elements are not easily disrupted by radiation. And compared with electronic memories, whose capacitors need constant topping up, magnetic memories are simpler and consume less power. The NRL researchers plan to commercialise their device through a company called Non-V olatile Electronics, which recently began work on the necessary processing and fabrication techniques. But it will be some years before the first chips roll off the production line.Most attention in the field in focused on an alternative approach based on magnetic tunnel-junctions (MTJs), which are being investigated by researchers at chipmakers such as IBM, Motorola, Siemens and Hewlett-Packard. IBM’s research team, led by Stuart Parkin, has already created a 500-element working prototype that operates at 20 times the speed of conventional memory chips and consumes 1% of the power. Each element consists of a sandwich of two layers of magnetisable material separated by a barrier of aluminium oxide just four or five atoms thick. The polarisation of lower magnetisable layer is fixed in one direction, but that of the upper layer can be set (again, by passing a current through a matrix of control wires) either to the left or to the right, to store a zero or a one. The polarisations of the two layers are then either the same or opposite directions.Although the aluminum-oxide barrier is an electrical insulator, it is so thin that electrons are able to jump across it via a quantum-mechanical effect called tunnelling. It turns out that such tunnelling is easier when the two magnetic layers are polarised in the same direction than when they are polarised in opposite directions. So, by measuring the current that flows through the sandwich, it is possible to determine the alignment of the topmost layer, and hence whether it is storing a zero or a one.To build a full-scale memory chip based on MTJs is, however, no easy matter. According to Paulo Freitas, an expert on chip manufacturing at the Technical University of Lisbon, magnetic memory elements will have to become far smaller and more reliable than current prototypes if they are to compete with electronic memory. At the same time, they will have to be sensitive enough to respond when the appropriate wires in the control matrix are switched on, but not so sensitive that they respond when a neighbouring elements is changed. Despite these difficulties, the general consensus is that MTJs are the more promising ideas. Dr. Parkin says his group evaluated the GMR approach and decided not to pursue it, despite the fact that IBM pioneered GMR in hard disks. Dr. Prinz, however, contends that his plan will eventually offer higher storage densities and lower production costs.Not content with shaking up the multi-billion-dollar market for computer memory, some researchers have even more ambitious plans for magnetic computing. In a paper published last month in Science, Russell Cowburn and Mark Well and of Cambridge University outlined research that could form the basis of a magnetic microprocessor — a chip capable of manipulating (rather than merely storing) information magnetically. In place of conducting wires, a magnetic processor would have rows of magnetic dots, each of which could be polarised in one of two directions. Individual bits of information would travel down the rows as magnetic pulses, changing the orientation of the dots as they went. Dr. Cowbum and Dr. Welland have demonstrated how a logic gate (the basic element of a microprocessor) could work in such a scheme. In their experiment, they fed a signal in at one end of the chain of dots and used a second signal to control whether it propagated along the chain.It is, admittedly, a long way from a single logic gate to a full microprocessor, but this was true also when the transistor was first invented. Dr. Cowburn, who is now searching for backers to help commercialise the technology, says he believes it will be at least ten years before the first magnetic microprocessor is constructed. But other researchers in the field agree that such a chip, is the next logical step. Dr. Prinz says that once magnetic memory is sorted out “the target is to go after the logic circuits.” Whether all-magnetic computers will ever be able to compete with other contenders that are jostling to knock electronics off its perch — such as optical, biological and quantum computing — remains to be seen. Dr. Cowburn suggests that the future lies with hybrid machines that use different technologies. But computing with magnetism evidently has an attraction all its own.In developing magnetic memory chips to replace the electronic ones, two alternative research paths are being pursued. These are approaches based on:
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MCQ-> Read the following passage carefully and answer the questions given below it.Certain words/phrases have been printed in bold to help you locate them while answering some of the questions.Princess Chandravati was very beautiful. She loved all kinds of ornaments and always wanted to wear the most precious and lovely jewels. Once, a jeweller came to the palace and gifted the king a wonderful diamond necklace. It glittered with big and small diamonds. It was certainly a very expensive necklace. The princess fell in love with it as soon as she saw it. So the king presented it to her. From that day on, the princess always wore that necklace, wherever she went. One day before going for a swim in the pond, she took the necklace off and put in the hands of her oldest and the most trustworthy servant. “Hold this and be careful. This is the most precious necklace in the whole world,” she said. The servant was an old woman. She sat under a tree, holding the ornament tightly and waited for the princess. It was a hot afternoon and the servant was very tired so she dozzed off .under the tree. Suddenly the servant felt that someone was tugging at the necklace and she woke up with a start. She looked around but no one was there and the necklace was gone. Scared out of her wits, the old servant started screaming. On hearing her scream the royal guards rushed to her. She pointed towards the direction in which the thief may have gone and the guards ran off that way. There was a poor and dim-witted farmer walking on the same road. As soon as he saw the royal guards running towards him, he thought that they wanted to catch him and started running. But he was not a strong man and could not outrun the hefty guards. The royal guards caught him in no time. “Where is it ?” they demanded, shaking him. “Where is what ?” the poor farmer stammered back. “The necklace you stole 1” thundered one of the royal guards. The farmer had no idea what they were talking about. He only understood that some precious necklace was lost and he was supposed to have it. He quickly replied, “I don’t know where it is now. I gave it to my landlord.” The guards ran towards the landlord’s house. “Give us the necklace right now !” the guards demanded of the fat landlord. “Necklace ? I don’t have any !” the stunned landlord replied. “Then tell us quickly who does,” demanded the soldiers. In order to get the royal guards off his back, the landlord pointed towards a priest who was walking by his house and said, “He does.” The guards now caught hold of the priest who was walking towards the temple and thinking about the lunch he had just eaten. The priest was stunned when one of the burly guards jumped on him and asked about the necklace. He remembered that the minister, Bhupati, was at the temple. He took the guards to the temple and pointed towards the praying minister, “I gave it to him,” he said. Bhupati too was caught and all four men were thrown in jail. The chief minister of the kingdom knew Bhupati well and was sure that Bhupati would never steal. He decided to find out who the culprit was. He hid near the jail where all four men were put and heard them talking. First, Bhupati asked the priest, “Panditji, why did you say that you gave the necklace to me ? I was quietly praying at the temple and now you have landed me in jail for no fault of mine.” The priest looked apologetic. He pointed towards the landlord and said, “I didn’t know what to say. He set the guards on me. I was simply passing by his house and was on my way to the temple.” The land lord looked at the priest sheepishly. Then he turned towards the poor farmer and yelled, “You lazy good-for-nothing man Why did you say that I had the necklace ?” The farmer, trembling under the angry gaze of all three men, said, “I was just walking home, The guards caught me and I did not know what to say.” On hearing, this conversation, the chief minister understood that all the four men were innocent. He immediately ordered the royal guards to search thoroughly, near the pond. The guards searched high and low till they saw something glinting on the tree. On the tree sat a monkey with the princess’ favourite necklace around his neck. It took a lot of coaxing and bananas before the monkey threw the necklace on the ground. The king apologised to all the four men and gave them gold coins as compensation. He requested his daughter to wear the necklace only indoors.Why did the king present the diamond necklace to his daughter ?
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MCQ-> The passage below is accompanied by a set of six questions. Choose the best answer to each question.Understanding where you are in the world is a basic survival skill, which is why we, like most species come hard-wired with specialised brain areas to create cognitive maps of our surroundings. Where humans are unique, though, with the possible exception of honeybees, is that we try to communicate this understanding of the world with others. We have a long history of doing this by drawing maps — the earliest versions yet discovered were scrawled on cave walls 14,000 years ago. Human cultures have been drawing them on stone tablets, papyrus, paper and now computer screens ever since.Given such a long history of human map-making, it is perhaps surprising that it is only within the last few hundred years that north has been consistently considered to be at the top. In fact, for much of human history, north almost never appeared at the top, according to Jerry Brotton, a map historian... "North was rarely put at the top for the simple fact that north is where darkness comes from," he says. "West is also very unlikely to be put at the top because west is where the sun disappears."Confusingly, early Chinese maps seem to buck this trend. But, Brotton, says, even though they did have compasses at the time, that isn't the reason that they placed north at the top. Early Chinese compasses were actually oriented to point south, which was considered to be more desirable than deepest darkest north. But in Chinese maps, the Emperor, who lived in the north of the country was always put at the top of the map, with everyone else, his loyal subjects, looking up towards him. "In Chinese culture the Emperor looks south because it's where the winds come from, it's a good direction. North is not very good but you are in a position of subjection to the emperor, so you look up to him," says Brotton.Given that each culture has a very different idea of who, or what, they should look up to it's perhaps not surprising that there is very little consistency in which way early maps pointed. In ancient Egyptian times the top of the world was east, the position of sunrise. Early Islamic maps favoured south at the top because most of the early Muslim cultures were north of Mecca, so they imagined looking up (south) towards it. Christian maps from the same era (called Mappa Mundi) put east at the top, towards the Garden of Eden and with Jerusalem in the centre.So when did everyone get together and decide that north was the top? It's tempting to put it down to European explorers like Christopher Columbus and Ferdinand Megellan, who were navigating by the North Star. But Brotton argues that these early explorers didn't think of the world like that at all. "When Columbus describes the world it is in accordance with east being at the top, he says. "Columbus says he is going towards paradise, so his mentality is from a medieval mappa mundi." We've got to remember, adds Brotton, that at the time, "no one knows what they are doing and where they are going."Which one of the following best describes what the passage is trying to do?
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