ER Modeling (Entities, Attributes, - Page 30

Practice Questions

Practice with answers, explanations, and exam-focused revision notes.

328333 MCQs Page 30

Topic Notes: Computer Science

These notes summarize the key preparation context before you attempt the MCQs. Review the topic focus, then practice the questions below with answers and explanations.

Quick Overview

Practice Computer Science MCQs to prepare for CSS, PMS, FPSC, PPSC, SPSC, KPPSC, BPSC, NTS, and university entry tests in Pakistan. This section covers key theoretical concepts, syllabus topics, and repeated past paper questions related to Computer Science.

Topic-Wise Breakdown

Structured subject modules organized by difficulty and exam frequency.

Verified Answer Keys

Detailed explanations cross-referenced with standard textbooks and commission keys.

Complete Coverage

Covers fundamental definitions, advanced problem-solving, and recent exam trends.

How to Prepare Computer Science MCQs for Competitive Exams

Review each sub-topic systematically. Start with fundamental concepts, practice multiple-choice question sets under timed conditions, and note down questions you missed in your revision tracker. Select a specific topic from the list below to begin practice.

Session Progress 0 / 0 Solved

Reveal answers to start tracking your session progress!

291

Read the passage: 'The green revolution of the mid-twentieth century dramatically multiplied global grain yields through high-yielding crop varieties, chemical fertilizers, and controlled irrigation. However, its long-term legacy includes groundwater depletion, soil degradation, and decreased genetic diversity across global staple crops.' What is the author's primary evaluation of the green revolution?

A It failed to achieve any noticeable increase in agricultural crop production. B It succeeded in boosting global crop yields but produced substantial long-term ecological consequences. C It eliminated the need for future agricultural innovations and chemical inputs. D Its techniques were adopted exclusively by developed industrial nations.

292

Read the passage: 'Public libraries have evolved beyond traditional book-lending depositories into modern digital community hubs. Today, they provide free high-speed internet access, workforce training workshops, language instruction, and access to advanced fabrication technologies like 3D printers, reinforcing civic equity in an increasingly digital society.' What is the primary focus of this passage?

A Print books have been completely eliminated from modern municipal libraries. B Public libraries have transformed their roles to provide essential technology access and community learning resources. C Public libraries operate primarily as commercial technology rental centers for businesses. D Workforce training seminars in libraries are more effective than university degree programs.

293

Read the passage: 'Desalination plants provide a vital source of fresh potable water for arid coastal nations lacking rivers or aquifers. Yet, the process consumes vast amounts of fossil fuel energy and produces concentrated toxic brine that, when pumped back into the sea, depletes dissolved oxygen and harms benthic marine life.' What is the main idea?

A Desalination produces clean water but carries notable energetic and marine environmental drawbacks. B Coastal nations have abandoned desalination in favor of freshwater pipeline imports. C Concentrated brine disposal improves benthic marine biodiversity near coastal outfalls. D Thermal desalination consumes less electrical energy than freshwater river purification.

294

Read the passage: 'Space debris in low-Earth orbit has grown exponentially, consisting of abandoned rocket boosters, defunctional satellites, and fragmentation fragments. Without proactive removal initiatives, this debris field risks triggering the Kessler syndrome, where collisions cascade into a self-sustaining chain reaction that could render near-Earth space unusable for satellites.' What is the author's main point?

A Commercial satellites have eliminated the risk of orbital collisions through automated avoidance thrusters. B Accumulating orbital debris threatens the long-term operational viability of near-Earth space unless actively managed. C Rocket boosters are the only source of dangerous debris in low-Earth orbit. D The Kessler syndrome has already rendered all low-Earth orbit orbits permanently impassable.

295

Read the passage: 'De-extinction technologies, such as somatic-cell cloning and CRISPR gene editing, theoretically offer the ability to resurrect extinct species like the passenger pigeon or woolly mammoth. However, bioethicists warn that reintroducing revived species into altered modern ecosystems could disrupt existing food webs and divert finite funds from protecting currently endangered wildlife.' What is the primary concern raised in the text?

A Gene editing has made modern wildlife conservation programs completely unnecessary. B De-extinction technology presents significant ecological risks and resource allocation dilemmas despite its scientific ambition. C Woolly mammoths cannot biologically adapt to cold arctic tundra conditions. D Bioethicists universally oppose all forms of laboratory genetic research.

296

Read the passage: 'Fast fashion relies on rapid production cycles and cheap synthetic textiles to deliver trendy clothing at minimal retail prices. This business model encourages disposable consumer habits, leading to massive textile waste in landfills, toxic dye contamination in waterways, and exploitative factory labor conditions.' What is the central thesis of the text?

A The fast fashion industry generates severe environmental and social costs through its low-cost, disposable production model. B Synthetic textiles are more durable and environmentally friendly than natural fibers. C Consumer demand for high-end designer apparel has declined due to fast fashion retail chains. D Textile waste can be fully mitigated by recycling garments into industrial insulation.

297

Read the passage: 'Early childhood language acquisition occurs effortlessly through natural social immersion, whereas adult second-language learners typically rely on explicit grammatical analysis and sustained memorization. Neuroscientists attribute this divergence to a critical developmental window during which synaptic plasticity in language-processing regions remains peak.' What is the main idea?

A Adults learn second languages more efficiently than children due to analytical skills. B Differences in neurodevelopmental plasticity explain why children acquire language more naturally than adults. C Formal grammatical instruction is the most effective approach for young children. D Language processing areas of the human brain remain completely unchanged across a person's lifespan.

298

Read the passage: 'Cryptographic encryption safeguards sensitive personal data, e-commerce transactions, and national security communications against unauthorized cyber interception. However, law enforcement agencies argue that unbreakable end-to-end encryption impedes criminal investigations, sparking intense debates between digital privacy advocates and national security officials.' What is the author's primary focus?

A End-to-end encryption has made conventional law enforcement agencies completely obsolete. B The tension between personal data privacy and law enforcement access creates an ongoing societal controversy over encryption. C Cybercriminals are unable to circumvent basic data encryption protocols. D E-commerce platforms should disable cryptographic security to assist police investigations.

299

Read the passage: 'Coral reefs occupy less than one percent of the ocean floor, yet they harbor roughly twenty-five percent of all marine species. Rising ocean temperatures trigger mass bleaching events by expelling symbiotic zooxanthellae algae, threatening the collapse of these exceptionally biodiverse marine habitats.' What is the primary message of this passage?

A Thermal stress threatens coral reefs, which support a disproportionately large share of global marine biodiversity. B Zooxanthellae algae are parasitic organisms that destabilize healthy coral structures. C Coral reefs cover the majority of global continental shelves and ocean floors. D Marine fish species can easily migrate and thrive in deep water if reefs degrade.

300

Read the passage: 'Proponents of universal basic income (UBI) argue that unconditional cash transfers provide a crucial safety net against automation-driven job loss and alleviate extreme poverty. Conversely, skeptics caution that funding such programs requires prohibitive taxation rates and may disincentivize labor force participation.' What is the main idea of the passage?

A UBI has been proven to trigger rapid labor market collapse in every trial country. B The debate over UBI centers on its potential to reduce poverty versus concerns regarding fiscal costs and work incentives. C Automation has already eliminated the vast majority of blue-collar industrial jobs worldwide. D Unconditional cash transfers are easier to finance than traditional targeted welfare programs.

ER Modeling (Entities, Attributes, Relationships) MCQs

Practice Questions

Topic Notes: Computer Science

Quick Overview

How to Prepare Computer Science MCQs for Competitive Exams

Browse categories

Mock Test

Subject Directory

Popular Categories