History and Generations of Computers MCQs

Passage: 'Urban heat islands (UHIs) represent a microclimatic phenomenon where metropolitan cores experience significantly higher temperatures than contiguous rural areas. This thermal differential stems from the replacement of vegetated landscapes with low-albedo, impervious surfaces like dark asphalt and concrete, which absorb and retain shortwave solar radiation during daylight and reradiate it as sensible heat at night. Furthermore, anthropogenic heat emissions from air conditioning compressors and combustion vehicles compound the warming effect, elevating cooling energy demand and worsening ground-level ozone pollution.'What can be inferred about painting urban rooftops white or covering them with green vegetation?

Passage: 'Urban heat islands (UHIs) represent a microclimatic phenomenon where metropolitan cores experience significantly higher temperatures than contiguous rural areas. This thermal differential stems from the replacement of vegetated landscapes with low-albedo, impervious surfaces like dark asphalt and concrete, which absorb and retain shortwave solar radiation during daylight and reradiate it as sensible heat at night. Furthermore, anthropogenic heat emissions from air conditioning compressors and combustion vehicles compound the warming effect, elevating cooling energy demand and worsening ground-level ozone pollution.'Which secondary environmental and public health issue is aggravated by elevated urban temperatures according to the text?

Passage: 'Urban heat islands (UHIs) represent a microclimatic phenomenon where metropolitan cores experience significantly higher temperatures than contiguous rural areas. This thermal differential stems from the replacement of vegetated landscapes with low-albedo, impervious surfaces like dark asphalt and concrete, which absorb and retain shortwave solar radiation during daylight and reradiate it as sensible heat at night. Furthermore, anthropogenic heat emissions from air conditioning compressors and combustion vehicles compound the warming effect, elevating cooling energy demand and worsening ground-level ozone pollution.'What role does surface albedo play in the formation of urban heat islands?

Passage: 'The Silk Road was never a single paved thoroughfare, but an expansive network of overland caravan routes and maritime conduits linking Chang'an (modern Xi'an) with Rome and Venice. While high-value luxury freight like Chinese silk, central Asian horses, and Roman glassware justified the perilous desert journeys, its most transformative impact was cultural and technological transmission. Along these oasis routes, Buddhism traversed from northern India into China, papermaking and block printing migrated westward into the Islamic world and Europe, and the Yersinia pestis bacterium traveled to trigger catastrophic medieval plague pandemics.'What unintended biological hazard traveled along the commercial trade corridors of the Silk Road according to the passage?

Passage: 'The Silk Road was never a single paved thoroughfare, but an expansive network of overland caravan routes and maritime conduits linking Chang'an (modern Xi'an) with Rome and Venice. While high-value luxury freight like Chinese silk, central Asian horses, and Roman glassware justified the perilous desert journeys, its most transformative impact was cultural and technological transmission. Along these oasis routes, Buddhism traversed from northern India into China, papermaking and block printing migrated westward into the Islamic world and Europe, and the Yersinia pestis bacterium traveled to trigger catastrophic medieval plague pandemics.'Which religion expanded from the Indian subcontinent into East Asia via the Silk Road network?

Passage: 'The Silk Road was never a single paved thoroughfare, but an expansive network of overland caravan routes and maritime conduits linking Chang'an (modern Xi'an) with Rome and Venice. While high-value luxury freight like Chinese silk, central Asian horses, and Roman glassware justified the perilous desert journeys, its most transformative impact was cultural and technological transmission. Along these oasis routes, Buddhism traversed from northern India into China, papermaking and block printing migrated westward into the Islamic world and Europe, and the Yersinia pestis bacterium traveled to trigger catastrophic medieval plague pandemics.'Why were commercial goods traded along the overland Silk Road restricted primarily to luxury commodities?

Passage: 'Circadian rhythms, the twenty-four-hour biological cycles governing physiological processes, are regulated by the suprachiasmatic nucleus (SCN) situated in the hypothalamus. The SCN is continuously synchronized to external daylight by intrinsically photosensitive retinal ganglion cells (ipRGCs). These cells contain the photopigment melanopsin, which is selectively sensitive to blue-wavelength light (around 460–480 nanometers). Exposure to artificial blue light from smartphone screens during late evening suppresses the pineal gland's secretion of melatonin, disrupting sleep architecture and impairing nighttime metabolic repair.'What can be inferred about working on a computer screen equipped with a blue-light-blocking filter at night?

Passage: 'Circadian rhythms, the twenty-four-hour biological cycles governing physiological processes, are regulated by the suprachiasmatic nucleus (SCN) situated in the hypothalamus. The SCN is continuously synchronized to external daylight by intrinsically photosensitive retinal ganglion cells (ipRGCs). These cells contain the photopigment melanopsin, which is selectively sensitive to blue-wavelength light (around 460–480 nanometers). Exposure to artificial blue light from smartphone screens during late evening suppresses the pineal gland's secretion of melatonin, disrupting sleep architecture and impairing nighttime metabolic repair.'How does evening exposure to artificial blue light from electronic devices disrupt sleep?

Passage: 'Circadian rhythms, the twenty-four-hour biological cycles governing physiological processes, are regulated by the suprachiasmatic nucleus (SCN) situated in the hypothalamus. The SCN is continuously synchronized to external daylight by intrinsically photosensitive retinal ganglion cells (ipRGCs). These cells contain the photopigment melanopsin, which is selectively sensitive to blue-wavelength light (around 460–480 nanometers). Exposure to artificial blue light from smartphone screens during late evening suppresses the pineal gland's secretion of melatonin, disrupting sleep architecture and impairing nighttime metabolic repair.'Which photopigment inside specialized retinal cells mediates the synchronization of circadian rhythms to blue light?

Passage: 'The development of synthetic nitrogen fertilizers via the Haber-Bosch process in the early twentieth century transformed global demographics. By fixing atmospheric nitrogen gas (N2) into bioavailable ammonia (NH3) under high pressures and temperatures with an iron catalyst, industrial agriculture bypassed the natural limitations of the nitrogen cycle. Today, roughly fifty percent of the nitrogen atoms in human tissues originate from Haber-Bosch chemical plants. However, agricultural runoff laden with excess synthetic nitrates triggers widespread eutrophication, creating vast coastal hypoxic dead zones where marine life suffocates.'What striking statistic does the author provide to demonstrate the ubiquity of Haber-Bosch nitrogen in modern human life?