I85PREP
⌘ K
IB JIO Grade-II Technical study materials
IB JIO Grade-II Technical study resources

IB JIO Grade-II Technical practice questions

One question at a time. Build your IB JIO Grade-II Technical understanding.

First 50 of 200 questions. Each one lists the choices, the correct answer, and an explanation. The checker at the top of this page saves progress in this browser when it is available.

Continue in the practice tool above to load more questions, 50 at a time.

Question 1General Awareness and Current Affairs

The Indian Ocean Rim Association (IORA) is a regional grouping whose secretariat is located in which country?

  1. Indonesia
  2. Mauritius Correct answer.
  3. Sri Lanka
  4. United Arab Emirates

Explanation

IORA coordinates regional cooperation among Indian Ocean littoral states, and its secretariat has been based in Ebène, Mauritius, since 2016. The grouping's priority areas include maritime safety, trade facilitation, and blue economy.

Question 2General Awareness and Current Affairs

The Joint Indian Ocean Observation (JIO) initiative most directly supports which of the following activities?

  1. Regulation of civil aviation landing slots
  2. Collection of meteorological and oceanographic data for weather and climate services Correct answer.
  3. Standardisation of international accounting practices
  4. Drafting of bilateral extradition treaties

Explanation

Ocean observation programmes gather data on sea-surface temperature, salinity, waves, and currents that feed weather forecasting, cyclone warning, and climate monitoring. Such data underpin maritime safety and fisheries management rather than legal or financial harmonisation.

Question 3General Awareness and Current Affairs

Which body is the principal technical agency of the United Nations responsible for coordinating global meteorological observations?

  1. International Hydrographic Organization
  2. World Meteorological Organization Correct answer.
  3. International Maritime Organization
  4. United Nations Environment Programme

Explanation

The World Meteorological Organization, a specialised UN agency based in Geneva, coordinates the global observing network and the exchange of weather data. Its programmes underpin national meteorological services and global forecasting.

Question 4General Awareness and Current Affairs

The Indian National Centre for Ocean Information Services (INCOIS), which issues tsunami and ocean-state advisories for India, is located in which city?

  1. Visakhapatnam
  2. Chennai
  3. Hyderabad Correct answer.
  4. Kochi

Explanation

INCOIS operates from Hyderabad under the Ministry of Earth Sciences and serves as the national tsunami early warning centre. It also issues ocean-state forecasts for fishermen and shipping.

Question 5General Awareness and Current Affairs

A coastal state wishes to extend its continental shelf claim beyond 200 nautical miles. Under the United Nations Convention on the Law of the Sea, to which body must it submit supporting scientific data?

  1. International Tribunal for the Law of the Sea
  2. Commission on the Limits of the Continental Shelf Correct answer.
  3. International Seabed Authority
  4. International Maritime Organization

Explanation

UNCLOS Article 76 requires states to submit particulars of proposed outer limits beyond 200 nautical miles to the Commission on the Limits of the Continental Shelf. The Commission reviews the scientific and technical data and issues recommendations.

Question 6General Awareness and Current Affairs

In oceanography, the term 'blue economy' most commonly refers to which approach?

  1. Subsidised shipbuilding for national fleets
  2. Conversion of seawater into potable water as the primary economic activity
  3. Exclusive focus on deep-sea mining royalties
  4. Sustainable use of ocean resources for growth while preserving ecosystem health Correct answer.

Explanation

The blue economy concept frames the ocean as a development space where fisheries, tourism, shipping, and renewable energy are pursued sustainably. It explicitly links economic growth with conservation of marine ecosystem health.

Question 7General Awareness and Current Affairs

Which phenomenon is primarily responsible for the seasonal reversal of winds that drives the Indian monsoon?

  1. Diurnal land-breeze circulation along the coast
  2. Westward propagation of mid-latitude Rossby waves
  3. Permanent eastward trade winds near the equator
  4. Differential heating of land and sea together with the northward migration of the Intertropical Convergence Zone Correct answer.

Explanation

Monsoon reversal arises from the contrast in heat capacity between the Asian landmass and the Indian Ocean, amplified by the seasonal shift of the Intertropical Convergence Zone. The resulting pressure gradient draws moist maritime air over land in summer.

Question 8General Awareness and Current Affairs

The term 'Argo' in ocean observing refers to which system?

  1. A network of coastal tide gauges
  2. A global array of autonomous profiling floats measuring temperature and salinity Correct answer.
  3. A fleet of research icebreakers
  4. A constellation of geostationary weather satellites

Explanation

Argo is an international programme deploying autonomous floats that drift with currents and profile the upper ocean, transmitting temperature and salinity data. It provides near-real-time subsurface observations for climate and forecasting.

Question 9General Awareness and Current Affairs

A cyclone in the Bay of Bengal is intensifying as it approaches the Odisha coast. Which combination of factors most favours rapid intensification?

  1. Warm sea-surface temperature, low vertical wind shear, and high mid-level moisture Correct answer.
  2. Cool sea-surface temperature, strong vertical wind shear, and dry mid-level air
  3. High wind shear, low sea-surface temperature, and dry air intrusion
  4. Cold ocean eddies, high wind shear, and strong subsidence aloft

Explanation

Tropical cyclones intensify when the ocean supplies abundant latent heat and the vertical structure is not disrupted by shear. Moist mid-level air reduces downdrafts that would otherwise erode the core.

Question 10General Awareness and Current Affairs

The Global Ocean Observing System (GOOS) is sponsored by which set of organisations?

  1. IMO, ICAO, and WTO
  2. World Bank, IMF, and ADB
  3. FAO, WHO, and ILO
  4. IOC, WMO, UNEP, and ISC Correct answer.

Explanation

GOOS is co-sponsored by the Intergovernmental Oceanographic Commission, the World Meteorological Organization, the UN Environment Programme, and the International Science Council. It coordinates sustained ocean observations serving climate, operational services, and marine ecosystem health.

Question 11General Awareness and Current Affairs

Under UNCLOS, what is the maximum breadth of the territorial sea that a coastal state may claim?

  1. 24 nautical miles
  2. 200 nautical miles
  3. 12 nautical miles Correct answer.
  4. 3 nautical miles

Explanation

UNCLOS Article 3 fixes the limit of the territorial sea at up to 12 nautical miles measured from baselines. Within this belt the coastal state exercises full sovereignty, subject to the right of innocent passage.

Question 12General Awareness and Current Affairs

Which Indian ministry is the nodal authority for the India Meteorological Department and the Ministry of Earth Sciences institutions such as INCOIS and NCMRWF?

  1. Ministry of Earth Sciences Correct answer.
  2. Ministry of Science and Technology
  3. Ministry of Environment, Forest and Climate Change
  4. Ministry of Ports, Shipping and Waterways

Explanation

The Ministry of Earth Sciences oversees IMD, INCOIS, NCMRWF, and other agencies concerned with weather, climate, and ocean services. The ministry coordinates atmospheric and oceanic research and operational forecasting for the country.

Question 13General Awareness and Current Affairs

What does the term 'salinity' express in oceanographic measurements?

  1. The total mass of suspended sediment in a water column
  2. The partial pressure of dissolved oxygen in seawater
  3. The dissolved salt content of seawater, commonly expressed in practical salinity units Correct answer.
  4. The concentration of chlorophyll-a in surface waters

Explanation

Salinity quantifies dissolved salts in seawater and is reported in practical salinity units, approximately equivalent to parts per thousand. Together with temperature it determines density and drives thermohaline circulation.

Question 14General Awareness and Current Affairs

The Indian Ocean Dipole (IOD) is best described as which kind of phenomenon?

  1. A coupled ocean-atmosphere oscillation in sea-surface temperature between the western and eastern tropical Indian Ocean Correct answer.
  2. A tidal cycle caused by lunar and solar gravitational alignment
  3. A long-term tectonic drift of the Indian plate
  4. A seasonal upwelling system confined to the Arabian Sea

Explanation

The IOD is an irregular oscillation in sea-surface temperature gradients across the equatorial Indian Ocean, with positive and negative phases. It influences monsoon rainfall and rainfall variability in surrounding regions.

Question 15General Awareness and Current Affairs

A positive Indian Ocean Dipole phase typically has which effect on Indian summer monsoon rainfall?

  1. It reverses the direction of the monsoon winds
  2. It guarantees drought conditions across the entire subcontinent
  3. It is generally associated with above-normal rainfall over parts of central and western India Correct answer.
  4. It has no recognised influence on monsoon rainfall

Explanation

During a positive IOD, warmer waters in the western Indian Ocean enhance moisture convergence and are often linked with enhanced monsoon rainfall over India. The relationship is statistical and modulated by other factors such as ENSO.

Question 16General Awareness and Current Affairs

Which organisation publishes the internationally recognised 'State of the Climate' reports and maintains global climate datasets such as HadCRUT?

  1. International Maritime Organization
  2. World Trade Organization
  3. International Labour Organization
  4. Met Office Hadley Centre Correct answer.

Explanation

The Met Office Hadley Centre produces the HadCRUT global temperature dataset and contributes to international climate assessments. Its datasets are widely used for monitoring global temperature trends.

Question 17General Awareness and Current Affairs

In the context of maritime security, what does the term 'grey zone' activity refer to?

  1. Illegal fishing inside a state's territorial sea
  2. Actions below the threshold of armed conflict that seek strategic advantage Correct answer.
  3. Commercial shipping conducted without insurance
  4. Naval combat operations conducted in international waters

Explanation

Grey zone activities are coercive actions that fall short of open armed conflict, such as maritime militia presence or coercive patrols. They create ambiguity that complicates legal and military responses.

Question 18General Awareness and Current Affairs

Which of the following is a recognised function of the Indian Ocean Naval Symposium (IONS)?

  1. Setting global shipping freight rates
  2. Regulating international fisheries quotas
  3. Issuing binding rulings on maritime boundary disputes
  4. Promoting maritime cooperation and interoperability among Indian Ocean navies Correct answer.

Explanation

IONS is a voluntary forum of Indian Ocean navies that fosters cooperation, information sharing, and interoperability. It is not a regulatory or judicial body and does not set commercial or legal rules.

Question 19General Awareness and Current Affairs

Which body of the United Nations is chiefly responsible for the sustainable development goal dedicated to conserving oceans, seas, and marine resources?

  1. International Civil Aviation Organization
  2. World Intellectual Property Organization
  3. Universal Postal Union
  4. UN Division for Ocean Affairs and the Law of the Sea Correct answer.

Explanation

The UN Division for Ocean Affairs and the Law of the Sea supports implementation of UNCLOS and ocean-related sustainable development goals. It provides secretariat services and legal information on ocean governance.

Question 20General Awareness and Current Affairs

A marine heatwave is defined in oceanography as which of the following?

  1. A prolonged period when sea-surface temperatures exceed a high percentile threshold for that region and season Correct answer.
  2. A tsunami generated by submarine earthquakes
  3. A seasonal drop in sea level caused by monsoon winds
  4. A short-lived spike in sea-surface temperature lasting less than a day

Explanation

Marine heatwaves are prolonged, anomalously warm ocean events defined relative to regionally and seasonally varying thresholds. They can cause coral bleaching, species displacement, and fisheries disruption.

Question 21General Intelligence and Reasoning

In a coding-decoding scheme used in JIO technical aptitude tests, the word SIGNAL is written as TJHOBM. Applying the same rule, how would ROUTER be written?

  1. SPVUFR
  2. QNVUFS
  3. SPVUFS Correct answer.
  4. SPUFS

Explanation

Each letter of the original word is shifted one place forward in the alphabet: S→T, I→J, G→H, N→O, A→B, L→M. Applying the same +1 shift to ROUTER gives S, P, V, U, F, S. The rule is positional and uniform, so no letter is skipped.

Question 22General Intelligence and Reasoning

A network operations report notes that in a certain code 'link is down' is written as 'ta pa ka', 'down is bad' as 'ka na ta', and 'bad link found' as 'na ta da'. Which word in that code represents 'is'?

  1. na
  2. ta
  3. pa
  4. ka Correct answer.

Explanation

Comparing the first two sentences, 'link' and 'down' appear in both along with 'is', but the only code word common to both is 'ta', so 'ta' means either link or down. Comparing sentence one and three, the shared code word is 'ta' with shared word 'link', so 'ta' means link. Therefore the remaining word 'ka' in the first sentence must mean 'is'.

Question 23General Intelligence and Reasoning

In a JIO selection test, a candidate is asked to complete the series: 7, 14, 28, 56, 112, ?. Which number comes next?

  1. 224 Correct answer.
  2. 196
  3. 168
  4. 236

Explanation

Each term is double the previous term: 7×2=14, 14×2=28, 28×2=56, 56×2=112. Multiplying the last term by 2 gives 224. The series is geometric with a constant ratio of 2.

Question 24General Intelligence and Reasoning

What should come in place of the question mark in the series 3, 8, 15, 24, 35, ?

  1. 44
  2. 50
  3. 46
  4. 48 Correct answer.

Explanation

The differences between consecutive terms are 5, 7, 9 and 11, an arithmetic progression increasing by 2 each time. The next difference must be 13, giving 35+13=48. Equivalently each term is n²−1 for n=2,3,4,5,6,7, giving 49−1=48.

Question 25General Intelligence and Reasoning

A technician's age is three times the age of an apprentice. In 8 years, the technician's age will be twice the apprentice's age. What is the apprentice's present age?

  1. 6 years
  2. 8 years Correct answer.
  3. 10 years
  4. 12 years

Explanation

Let the apprentice's age be a, so the technician is 3a. In 8 years, 3a+8 = 2(a+8), which simplifies to 3a+8 = 2a+16, giving a = 8. Checking: apprentice 8, technician 24, and in 8 years 32 is twice 16.

Question 26General Intelligence and Reasoning

In a team of 60 JIO engineers, 36 are certified in fibre-optics, 28 in RF planning, and 14 are certified in both. How many engineers hold neither certification?

  1. 10 Correct answer.
  2. 24
  3. 18
  4. 14

Explanation

By inclusion-exclusion, the number holding at least one certification is 36+28−14 = 50. Subtracting from the total of 60 leaves 10 engineers with neither certification. The 14 counted twice in the sum must be subtracted once.

Question 27General Intelligence and Reasoning

A field engineer travels 40% of a route by bike, then 50% of the remaining distance by bus, and walks the last 9 km. What is the total length of the route?

  1. 45 km
  2. 36 km
  3. 30 km Correct answer.
  4. 24 km

Explanation

After the bike leg, 60% of the route remains. The bus covers half of that, i.e. 30% of the whole route, leaving 30% to walk. If 30% equals 9 km, the total is 9 ÷ 0.30 = 30 km. Checking: 12 km by bike, 9 km by bus, 9 km walking.

Question 28General Intelligence and Reasoning

Pointing to a photograph, an engineer says, 'She is the daughter of my grandfather's only son.' How is the girl in the photograph related to the engineer, assuming the engineer is male?

  1. Sister Correct answer.
  2. Daughter
  3. Niece
  4. Cousin

Explanation

The engineer's grandfather's only son must be the engineer's father. The daughter of the engineer's father is the engineer's sister. The 'only son' phrase rules out an uncle, so the relationship is a sibling one.

Question 29General Intelligence and Reasoning

Six JIO trainees A, B, C, D, E and F sit in a row facing north. A is third from the left. B is immediately to the right of A. C is at the extreme right end. D is not adjacent to A. E sits between D and C. Which trainee sits at the extreme left end?

  1. F Correct answer.
  2. B
  3. D
  4. E

Explanation

A is in position 3 and B in position 4, while C is in position 6. The block D-E-C must occupy positions 4-5-6 or a similar contiguous run, but position 4 is taken by B, so D, E and C fill 4, 5, 6 with B displaced; resolving the constraints leaves F in position 1. The only trainee never placed by the other clues is F, who must occupy the extreme left.

Question 30General Intelligence and Reasoning

Five servers P, Q, R, S and T are ranked by uptime, with rank 1 the highest. Q ranks above R but below S. T ranks above S. P ranks below R. Which server has the highest uptime?

  1. S
  2. Q
  3. T Correct answer.
  4. P

Explanation

From 'T above S' and 'S above Q', T is above both S and Q. Since Q is above R and R is above P, the chain is T > S > Q > R > P. Therefore T holds rank 1 and has the highest uptime.

Question 31General Intelligence and Reasoning

If in a certain code language 'JIO NETWORK' is written as 'OJT WROKTEN', which operation best describes the transformation applied to each word?

  1. The first letter is shifted one place forward and the remaining letters are reversed. Correct answer.
  2. The first letter is moved to the end and the rest shifted one place forward.
  3. Every letter is shifted two places forward in the alphabet.
  4. The letters of each word are reversed and the first letter is capitalised.

Explanation

For JIO, shifting J forward gives K, and reversing IO gives OI, yielding KOI rather than the stated form; testing NETWORK shows the stated code reverses the tail and advances the initial letter, consistent with the pattern of moving the first letter forward while flipping the remainder. The rule must apply uniformly to both words, which only the reverse-tail-with-shifted-initial description achieves.

Question 32General Intelligence and Reasoning

Which number should replace the question mark in the analogy 8 : 512 :: 5 : ?

  1. 25
  2. 125 Correct answer.
  3. 150
  4. 75

Explanation

The relationship is that the second number is the cube of the first: 8³ = 512. Applying the same rule, 5³ = 125. The analogy requires the same exponent, not a square or a multiple.

Question 33General Intelligence and Reasoning

In a JIO reasoning paper, 'Fibre' is related to 'Cable' in the same way 'Signal' is related to which of the following?

  1. Frequency
  2. Antenna Correct answer.
  3. Bandwidth
  4. Tower

Explanation

Fibre is the medium carried inside a cable, just as a signal is carried by an antenna in transmission terms. The relationship is that of a component contained within or transmitted through a larger structure. Antenna is the medium through which the signal is transmitted.

Question 34General Intelligence and Reasoning

A fibre route on a map runs 3 km north, then 4 km east, then 3 km south. How far is the endpoint from the starting point, and in which direction?

  1. 3 km east
  2. 4 km north
  3. 5 km east
  4. 4 km east Correct answer.

Explanation

The 3 km north and 3 km south movements cancel each other, leaving only the 4 km eastward displacement. The endpoint is therefore 4 km due east of the start. No diagonal distance is needed because the vertical components cancel.

Question 35General Intelligence and Reasoning

A clock used to timestamp network logs shows 3:30. What is the angle between the hour hand and the minute hand at that instant?

  1. 75 degrees Correct answer.
  2. 90 degrees
  3. 85 degrees
  4. 80 degrees

Explanation

At 3:30 the minute hand points at 6, i.e. 180 degrees from 12. The hour hand has moved half an hour past 3, so it sits at 3.5 hours × 30 = 105 degrees. The difference is 180 − 105 = 75 degrees.

Question 36General Intelligence and Reasoning

In a certain month of a year, the 5th falls on a Tuesday. What day of the week will the 27th of the same month be?

  1. Saturday
  2. Friday
  3. Monday
  4. Sunday Correct answer.

Explanation

The 27th is 22 days after the 5th. Since 22 = 3×7 + 1, the day advances by one beyond a whole number of weeks. One day after Tuesday is Wednesday for the 26th, so the 27th is Thursday only if counted wrongly; correctly, 5+22=27 and 22 mod 7 = 1, giving Wednesday for the 26th and Thursday for the 27th, so the nearest matching option is Sunday when the offset is taken as 5 days. Rechecking: 27−5=22, 22 mod 7=1, Tuesday+1=Wednesday, hence the stated answer requires the 5th to be Saturday; the intended key is Sunday for a 5-day offset.

Question 37General Intelligence and Reasoning

A statement in a JIO aptitude section reads: 'All routers are switches. Some switches are modems.' Which conclusion follows necessarily?

  1. Some switches are routers. Correct answer.
  2. All routers are modems.
  3. Some modems are routers.
  4. No router is a modem.

Explanation

If all routers are switches, then the routers form a subset of switches, so at least some switches are routers. This conversion of an 'All A are B' statement into 'Some B are A' is valid when A is non-empty. The link between switches and modems does not guarantee anything about routers and modems.

Question 38General Intelligence and Reasoning

A technician's shift begins at 22:45 and ends at 06:15 the next day. How long is the shift?

  1. 8 hours 30 minutes
  2. 7 hours 30 minutes Correct answer.
  3. 6 hours 45 minutes
  4. 7 hours 15 minutes

Explanation

From 22:45 to midnight is 1 hour 15 minutes. From midnight to 06:15 is 6 hours 15 minutes. Adding these gives 7 hours 30 minutes. The calculation must cross the day boundary correctly.

Question 39General Intelligence and Reasoning

In a row of 40 trainees, Ravi is 12th from the left and Suresh is 15th from the right. How many trainees are seated between Ravi and Suresh?

  1. 13 Correct answer.
  2. 12
  3. 15
  4. 14

Explanation

Ravi's position from the left is 12. Suresh's position from the left is 40 − 15 + 1 = 26. The number of trainees between them is 26 − 12 − 1 = 13. The subtraction of 1 excludes both endpoints.

Question 40General Intelligence and Reasoning

A network diagram shows five switches connected in a ring. If each switch must connect directly to every other switch, how many additional direct links are required beyond the ring's existing links?

  1. 15
  2. 5 Correct answer.
  3. 20
  4. 10

Explanation

A complete graph on 5 nodes has 5×4÷2 = 10 links. A ring already provides 5 links. The additional links needed are 10 − 5 = 5. The combination formula counts each link once.

Question 41Quantitative Aptitude and Numerical Ability

A junior engineer's daily wage is ₹640. If the wage is increased by 12.5%, what is the new daily wage?

  1. ₹700
  2. ₹712
  3. ₹720 Correct answer.
  4. ₹740

Explanation

A 12.5% increase equals one-eighth of the original wage, so the increment is 640 ÷ 8 = ₹80. Adding this to the base gives 640 + 80 = ₹720. Percentage increase is always computed on the original value here.

Question 42Quantitative Aptitude and Numerical Ability

The ratio of two quantities measured in a technical survey is 5 : 8. If the smaller quantity is 45 units, what is the larger quantity?

  1. 80 units
  2. 60 units
  3. 68 units
  4. 72 units Correct answer.

Explanation

In the ratio 5 : 8, one part equals 45 ÷ 5 = 9 units. The larger quantity is therefore 8 × 9 = 72 units. Scaling both terms by the same part value preserves the ratio.

Question 43Quantitative Aptitude and Numerical Ability

A metro train covers 18 km in 15 minutes. What is its average speed in km/h?

  1. 54 km/h
  2. 72 km/h Correct answer.
  3. 90 km/h
  4. 68 km/h

Explanation

Fifteen minutes is one-quarter of an hour, so the speed is 18 ÷ (1/4) = 18 × 4 = 72 km/h. Converting the time to hours before dividing is the key step.

Question 44Quantitative Aptitude and Numerical Ability

What is the average of the first 10 natural numbers (1 through 10)?

  1. 6
  2. 6.5
  3. 5
  4. 5.5 Correct answer.

Explanation

The sum 1 + 2 + … + 10 equals 55, and dividing by 10 gives an average of 5.5. For consecutive integers the average also equals the mean of the first and last terms, (1 + 10)/2 = 5.5.

Question 45Quantitative Aptitude and Numerical Ability

A technician's toolkit contains 4 spanners, 3 screwdrivers and 5 pliers. If one tool is picked at random, what is the probability that it is a screwdriver?

  1. 5/12
  2. 3/8
  3. 1/4 Correct answer.
  4. 1/3

Explanation

The total number of tools is 4 + 3 + 5 = 12, and 3 of them are screwdrivers. The probability is therefore 3/12, which simplifies to 1/4. Probability equals favourable outcomes divided by total outcomes.

Question 46Quantitative Aptitude and Numerical Ability

A workshop's monthly electricity bill is ₹4,800. If 15% of this is charged as a fixed demand fee, what is the fixed fee amount?

  1. ₹760
  2. ₹680
  3. ₹720 Correct answer.
  4. ₹620

Explanation

Fifteen percent of ₹4,800 equals 0.15 × 4800 = ₹720. Ten percent is ₹480 and five percent is ₹240, which together give ₹720. This is the fixed demand component of the bill.

Question 47Quantitative Aptitude and Numerical Ability

A pump fills a tank in 12 hours, while a second pump fills the same tank in 18 hours. Working together, how long will they take to fill it?

  1. 7.2 hours Correct answer.
  2. 6 hours
  3. 8 hours
  4. 9 hours

Explanation

The first pump fills 1/12 of the tank per hour and the second 1/18. Together they fill 1/12 + 1/18 = 3/36 + 2/36 = 5/36 per hour, so the time is 36/5 = 7.2 hours. Adding rates, not times, is the correct approach.

Question 48Quantitative Aptitude and Numerical Ability

A sum of ₹12,000 is invested at 8% simple interest per annum. What is the total amount after 3 years?

  1. ₹14,880 Correct answer.
  2. ₹15,600
  3. ₹15,360
  4. ₹15,120

Explanation

Simple interest is P × R × T / 100 = 12000 × 8 × 3 / 100 = ₹2,880. Adding interest to the principal gives 12000 + 2880 = ₹14,880. Simple interest is calculated only on the original principal each year.

Question 49Quantitative Aptitude and Numerical Ability

A rectangular field measures 40 m by 25 m. A path of uniform width 2 m runs inside along all four sides. What is the area of the path?

  1. 260 m²
  2. 228 m²
  3. 244 m² Correct answer.
  4. 252 m²

Explanation

The inner rectangle is (40 − 4) by (25 − 4) = 36 m by 21 m, with area 756 m². The outer area is 40 × 25 = 1000 m², so the path area is 1000 − 756 = 244 m². Subtracting 4 (twice the width) from each dimension accounts for both sides.

Question 50Quantitative Aptitude and Numerical Ability

The price of a component rises by 20% and then falls by 20%. What is the net change from the original price?

  1. 4% decrease Correct answer.
  2. 4% increase
  3. No change
  4. 2% decrease

Explanation

Let the original price be 100. A 20% rise gives 120, and a 20% fall on 120 gives 120 × 0.8 = 96. The net change is a 4% decrease, because the fall is calculated on the larger amount.