DSSSB TGT Computer Science PYQ, 25 Jun 2023, Shift 1 (8:30 AM)

Explanation

In 69, 81 and 87 both numbers are divisible by 3 (second = first × 7, a multiple of 21). In 67-469 neither 67 nor 469 is divisible by 3, so it is the odd pair.

Explanation

Troupes ⊂ flowers ⊂ jungles ⊂ gangs. So all troupes are jungles (III), some jungles are flowers (II), and some gangs are jungles (I, 'juggles' is a typo). All three follow.

Explanation

P × Q: P is father of Q; Q − R: Q is sister of R; R + S: R is brother of S. Q, R and S are siblings, so P is the father of S.

Explanation

In the series the outer shape and inner symbols change one element at a time; after the large Λ with a circle and triangle, the next figure keeps the Λ and circle and changes the inner symbol, which is figure (C).

Explanation

Calling health the 'best wealth' is a reminder that people tend to neglect health while chasing money, so I is taken to follow. II is an extreme claim ('of no use') that the statement does not make.

Explanation

Swap × and +: 105 ÷ 21 × 67 − 64 + 16 = 5 × 67 − 64 + 16 = 335 − 64 + 16 = 287.

Explanation

The letters are A, C, E, H, L, O, R, which form CHOLERA. Its middle (4th) letter is L.

Explanation

In the other three pairs the letters change alternately by +2 and −1 (e.g. I→K, N→M). In CABALETTA the pattern is −2, +1 (C→A, A→B), so it is different.

Explanation

Arvind is 3 places ahead of Ramesh, so he is 12th from the top. From the bottom: 50 − 12 + 1 = 39th.

Explanation

In the others the second number is 5 times the first (55×5 = 275, 35×5 = 175, 25×5 = 125). 45×5 = 225, not 235.

Explanation

37 + 42 ÷ 21 × 37 − 67 = 37 + 2 × 37 − 67 = 37 + 74 − 67 = 44, so the equation balances.

Explanation

Statement I only shows Mohan is shorter than Sachin and Vipin; II only compares Devika and Gangan. Even together the two groups are not linked, so the shortest cannot be found.

Explanation

Regular inspection and maintenance (II) is a practical step to fix the roads. Punishing all employees of the authority (I) is a harsh blanket action without proof of their fault, so it does not follow.

Explanation

Checking each even number that has an odd number after it and no even number before it gives 13 such numbers.

Explanation

Rounding: 56 ÷ 28 − 68 + 98 × 14 ≈ 2 − 68 + 1372 = 1306. (The exact value is about 1276, and 1306 is still the closest option.)

Explanation

The shape of figure X (a vertical stroke, a small step, a slant down to the left and a base line) is embedded in figure 3.

Explanation

After sunrise the sun is in the east, so shadows fall towards the west. The coach's shadow falls in front of Messi, so Messi stands west of the coach facing him, i.e. towards the east.

Explanation

S > P > Q > U > T, with R only known to be younger than S (placed above P). Counting from the youngest: T, U, then Q, so Q is third youngest.

Explanation

MATTER: each letter +1 gives NBUUFS, then each pair of letters is swapped: BN UU SF. HOTELS +1 = IPUFMT, swapping pairs gives PIFUTM.

Explanation

With a mirror on the right, left and right are swapped while top and bottom stay the same. Only figure 2 is the exact left-right reversal of the given figure.

Explanation

The Digital India Awards are instituted by the Ministry of Electronics and Information Technology (MeitY) to honour digital governance initiatives.

Explanation

The Shanti Swarup Bhatnagar Prize 2021 was announced for 11 scientists across the science and technology disciplines.

Explanation

Repo rate is the rate at which commercial banks borrow from the RBI by selling securities with an agreement to repurchase them. Reverse repo is the rate at which the RBI borrows from banks.

Explanation

Mubarak Shah Khalji (1316-1320) annexed Devagiri after ending the Yadava kingdom, bringing southern territory directly under the Delhi Sultanate.

Explanation

EXIM Bank and SIDBI launched the Ubharte Sitaare Fund in 2021 to identify and support promising small and mid-sized export-oriented companies.

Explanation

Uttar Pradesh has 403 assembly constituencies, the most of any state. Maharashtra has 288 and Tamil Nadu 234.

Explanation

Under Article 243F, a person must be at least 21 years old to be a member of a Panchayat.

Explanation

Malaria is spread by the female Anopheles mosquito, which is a vector. Diabetes and cancer are non-communicable, and Covid-19 spreads directly between people.

Explanation

Kylian Mbappe scored 8 goals at the 2022 FIFA World Cup in Qatar and won the Golden Boot. Messi won the Golden Ball.

Explanation

The 2022 Ranji Trophy final was played between Mumbai and Madhya Pradesh; Madhya Pradesh won its first title.

Explanation

Under Article 64, the Vice-President of India is the ex-officio Chairman of the Rajya Sabha.

Explanation

Voyager 1 crossed the heliopause into interstellar space in 2012, the first human-made object to do so.

Explanation

Mission Karmayogi (National Programme for Civil Services Capacity Building) aims to build a competent civil service rooted in Indian ethos.

Explanation

The Trinity of Carnatic music is Tyagaraja, Muthuswami Dikshitar and Syama Sastri. Tenali Raman was a poet in the court of Krishnadevaraya.

Explanation

Muhammad bin Tughluq planned an expedition to conquer Khurasan and raised a large army for it, but the plan was abandoned.

Explanation

Only i is correct: the Koya rebellion was led by Tomma Dora. The Pabna uprising was led by Ishan Chandra Roy and Shambhu Pal, and the Kharwar movement by Bhagirath Manjhi.

Explanation

The Khajuraho group of temples was built by the Chandela Rajputs, mainly between about 950 and 1050 CE.

Explanation

Pada Bheda (foot positions), Chalis (gaits) and Bhramaris (turns) are technical terms of Odissi dance.

Explanation

The Charminar in Hyderabad is not a UNESCO World Heritage Site. The Red Fort, Taj Mahal and Humayun's Tomb are.

Explanation

According to the MNRE Annual Report 2021-22, solar power had the largest installed renewable capacity, ahead of wind.

Explanation

A (5 L, 3:4) has 15/7 L spirit and 20/7 L water; B (6 L, 5:9) has 15/7 L spirit and 27/7 L water. Mix ratio = 30:47, so 462 mL has 180 mL spirit and 282 mL water. For 1:2 water must be 360 mL, so add 78 mL.

Explanation

p divides the differences 852, 1491 and 2343, whose HCF is 213 = 3 × 71. The 2-digit p is 71, and 3336 = 71 × 46 + 70, so q = 70 and p − q = 1.

Explanation

Take B = 100, A = 160, C = 1.55 × 60 = 93. New A = 96, new C = 93 × 4/3 = 124. (124 − 96)/96 × 100 = 29.2%.

Explanation

In 2018 B's profit = 45% of 300 = 135 crore. A's expenditure = 390/1.30 = 300, so its profit = 90 crore. (135 − 90)/90 × 100 = 50%.

Explanation

Cylinder volume = π × 18² × 32 = 10368π = (1/3)πr² × 24, so r² = 1296 and r = 36. Slant height = √(36² + 24²) = 12√13, so curved area = π × 36 × 12√13 = 432√13π.

Explanation

7 7/8 ÷ 9 9/20 = 5/6; 46/9 − 5/6 = 77/18; ÷ 11/9 = 7/2. Bracket: 21/4 ÷ (3/28) × 2/7 = 14, × 3/14 = 3. So 7/2 − 3 + 3/4 = 5/4 = 1 1/4.

Explanation

P = kQ/R gives 4.5 = k × 2.7/1.6, so k = 8/3. Then 6 = (8/3) × 15/R, giving R = 40/6 = 20/3.

Explanation

CP = 2070/0.9 = ₹2300. For a 20% profit, SP = 2300 × 1.2 = ₹2760.

Explanation

2500 × (1 − x/100) × 0.90 × 0.88 = 1683, so 1 − x/100 = 0.85 and x = 15. A single discount of 45% gives 2500 × 0.55 = ₹1375.

Explanation

28² + 45² = 784 + 2025 = 2809 = 53², so the triangle is right-angled and the circumradius is half the hypotenuse, 26.5 cm. Area = π × 26.5² = 702.25π.

Explanation

Exports in 2017 and 2019 = 170 + 190 + 220 + 320 = 900. Production in 2018 and 2020 = 340 + 360 + 450 + 470 = 1620. (1620 − 900)/1620 × 100 = 44.4%.

Explanation

Total time = 450 ÷ (900/19) = 9.5 h. The first two parts take 180/45 + 150/50 = 7 h, so 120 km take 2.5 h and x = 48 km/h.

Explanation

Half the height is 6 cm, so the cylinder radius² = 10² − 6² = 64. Cylinder = π × 64 × 12 = 768π; sphere = 4000π/3. 768 × 3/4000 = 0.576, i.e. 57.6%.

Explanation

With rate 16% = 4/25, instalment x satisfies 13500 = x(25/29) + x(25/29)² = 1350x/841, so x = ₹8410. Total paid = 16820, so interest = 16820 − 13500 = ₹3320.

Explanation

Initial ratio 5/8 : 3/5 = 25 : 24. Capital-months: A = 25×6 + 20×6 = 270, B = 24×6 + 36×6 = 360, so 3 : 4. A's 3/7 share = 15 lakh, so total = 35 lakh.

Explanation

Let downstream speed = d, upstream = 0.4d. 15/0.4d + 15/d = 52.5/d = 14/3, so d = 11.25 and upstream = 4.5. Still-water speed = (11.25 + 4.5)/2 = 7 7/8 km/h.

Explanation

A + B fill 1/18 + 1/27 = 5/54 per hour. 15(5/54 − c) = 5/36 gives c = 1/12, so C empties the tank in 12 h and one-third of it in 4 h.

Explanation

64% of 150 = 96 correct needed. He has 60% of 90 = 54, so he needs 42 of the remaining 60, which is 70%.

Explanation

x² = (19 + 4√15) + (19 − 4√15) − 2√(361 − 240) = 38 − 2 × 11 = 16. Since x > 0, x = 4.

Explanation

In 4 1/3 years at 10% the interest is 13/30 of P, so P × 43/30 = 9417 and P = 6570. At 12.5% for 2.4 years interest is 30%, so amount = 6570 × 1.3 = ₹8541.

Explanation

Predictable means expected or foreseeable. Improbable (unlikely to happen) is the opposite; the other options are synonyms.

Explanation

'Miss the boat' means to lose an opportunity by being too slow to act.

Explanation

A introduces the collision of two MiGs, D says one crashed near Pensara, C says the other crashed in the fields, and B ('As a result') describes the fire and injuries: ADCB.

Explanation

We walk 'along' or 'on' the beach, not 'through' it, so 'through the beach' is the error.

Explanation

An arsenal is a collection or store of weapons and military equipment. An archive stores records, an apiary is for bees, and an asylum is a refuge.

Explanation

A heel is the back part of the foot, and to heal means to recover. So 'My injured heel will heal soon.'

Explanation

D states the problem (funds exhausted), C its result (no books), B introduces a solution, and A gives the solution: DCBA.

Explanation

'Hopping' does not fit a slow recovery. The keyed 'limping' suggests travel is returning to normal slowly and with difficulty after Covid.

Explanation

Someone with a 'short fuse' gets angry very quickly.

Explanation

'Crucial' is spelt correctly. The others should be Competence, Command and Complexity.

Explanation

'Gearing up' means preparing for something, which fits the palace preparing for the festival, so no substitution is needed.

Explanation

'Fast train' is the standard collocation for an express train. 'Quick', 'speedy' and 'brisk' are not used this way.

Explanation

Anthropology is the study of humans and their evolution. Geology studies the earth, archaeology ancient remains, and cartography maps.

Explanation

'Whether' is wrong here. The clause shows contrast, so it should be 'Although/Though I do not agree'.

Explanation

The correct spelling is 'Allot' (double l, single t), so 'Alott' is wrong.

Explanation

The passage says a cyclist is an odd man out on the chaotic road, 'an unwelcome disruptor among the automobiles'.

Explanation

The passage mentions that cycling is carbon-free, symbolises balanced living and reduces stress, but says nothing about moving easily through traffic jams.

Explanation

'Unfriendly' roads are roads that are hostile or unsuitable for cyclists, which is the meaning of 'inhospitable'.

Explanation

The WhatsApp exchange about a missing repair shop leads into the writer's question 'Where have the bicycle repairers gone?', so it introduces the topic.

Explanation

Egalitarianism is the belief in equality of all people. The writer means cycling brings people together as equals and removes inequalities.

Explanation

यहाँ 'तीन बेर' दो बार आया है और दोनों बार अर्थ अलग है: पहले 'तीन बार (समय)' खाना और फिर 'केवल तीन बेर (फल)' खाना। एक ही शब्द की भिन्न अर्थ में आवृत्ति यमक अलंकार है।

Explanation

'वामावर्त' का अर्थ है बायीं ओर को घूमा हुआ (वाम + आवर्त)। इसका विलोम 'दक्षिणावर्त' है।

Explanation

सही लोकोक्ति है 'ठोकर लगी पहाड़ की, तोड़े घर की सिल'। 'सील' (नमी) गलत है, 'सिल' (पत्थर की पटिया) सही है।

Explanation

पहला वाक्य व्याकरण और पदक्रम दोनों में शुद्ध है। अन्य वाक्यों में पदक्रम या 'जैसा-वैसा' का प्रयोग गलत है, जैसे 'लोग जग्गू को जगुआ कहकर पुकारते थे'।

Explanation

मातृ + उपदेश: ऋ के बाद भिन्न स्वर 'उ' आने पर ऋ का 'र्' हो जाता है (यण संधि), जिससे 'मात्रुपदेश' बनता है।

Explanation

'नौकर' फ़ारसी मूल का शब्द है, इसलिए विदेशज है। घोंसला, लोटा और झरोखा देशज/तद्भव शब्द हैं।

Explanation

करण कारक साधन बताता है और इसका चिह्न 'से' है। 'कानों (से) सुनी बात' में कान सुनने का साधन है।

Explanation

पहले वाक्य का पदक्रम शुद्ध है। चौथे वाक्य का सही रूप होगा: 'जो किसी वस्तु को अलंकृत करे, वह अलंकार है', और अन्य वाक्यों में भी पद अनुचित स्थान पर हैं।

Explanation

'सरिस' (समान) वाचक शब्द है, जिससे मन की तुलना पीपल के पत्ते से की गई है। उपमेय, उपमान और वाचक शब्द होने से यह उपमा अलंकार है।

Explanation

गरल का अर्थ विष है और इसका विलोम सुधा (अमृत) है। कालकूट भी विष का पर्याय है।

Explanation

'अथक परिश्रम' प्रचलित और अर्थपूर्ण प्रयोग है: बिना थके किए गए श्रम और लगन से व्यवसाय सफलता की चरमसीमा पा सकता है।

Explanation

सही मुहावरा 'जीभ पर सरस्वती बसना' है, जिसका अर्थ है वाणी में मधुरता या प्रभाव होना। सरस्वती वाणी की देवी हैं।

Explanation

क्षणभंगुर का अर्थ है क्षण भर में नष्ट होने वाला, इसका पर्याय नश्वर है।

Explanation

समाहार द्वंद्व में पदों के अर्थ के साथ उसी प्रकार के अन्य अर्थ भी शामिल होते हैं। 'सेठ-साहूकार' से सेठ, साहूकार और अन्य धनी लोग समझे जाते हैं।

Explanation

'वर्द्धकि' संस्कृत (तत्सम) शब्द है, इसका तद्भव रूप 'बढ़ई' है: 'इस बढ़ई के पैसे दे दो।'

Explanation

पूरा गद्यांश डॉ. रामकुमार वर्मा के एकांकियों के विषय, आदर्शवाद और शिल्प के बारे में है, इसलिए 'डॉ. रामकुमार वर्मा के एकांकी' उचित शीर्षक है।

Explanation

प्रौढ़ता का अर्थ परिपक्वता है, इसलिए इसका विपरीतार्थक 'अप्रौढ़ता' (अपरिपक्वता) है। परिपक्वता इसका पर्याय है।

Explanation

गद्यांश रामकुमार वर्मा के एकांकियों के गुण-दोषों का मूल्यांकन करता है ('यथार्थ से दूर', 'युग प्रवर्तक'), इसलिए यह आलोचनात्मक शैली है।

Explanation

परिणति का अर्थ है परिणाम या अंत। 'आपके व्यवहार की परिणति है कि इतने लोग आपको पसंद करते हैं' में यह सही अर्थ में प्रयुक्त है।

Explanation

सरंजाम का अर्थ है साज-सामान या प्रबंध। प्रतिष्ठा, आदर और आवभगत सम्मान के पर्याय हैं।

Explanation

Congestion occurs when more packets enter (part of) a network than it can handle, causing queuing delay and packet loss.

Explanation

CSS transitions (transition property) change property values smoothly over a set duration instead of instantly.

Explanation

Software Configuration Management identifies, controls, audits and reports changes made to software during development and after release.

Explanation

Virtual memory uses disk space as an extension of RAM, giving programs the illusion of a very large main memory.

Explanation

!= (not equal to) is a relational operator. && and || are logical AND/OR, and ! is logical NOT.

Explanation

Only (ii) is true: a servlet receives and answers requests, usually over HTTP. It runs inside a web server or servlet container, so (i) is false.

Explanation

The management point of view of knowledge management focuses on determining, organising, directing, facilitating and monitoring knowledge practices to meet business goals.

Explanation

Recovery testing deliberately makes the software fail in different ways and checks that recovery is performed correctly.

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By default BASH shows $ as the prompt for a normal user; # is shown for the root user.

Explanation

Flash memory is non-volatile (NVRAM-type) memory that keeps its data without power, as in pen drives and SSDs. Cache, registers and main RAM are volatile.

Explanation

Quadratic equations are solved by factorisation, completing the square or the quadratic formula. Convergence is not a method for solving them.

Explanation

Microsoft developed the .NET Framework and released version 1.0 in 2002.

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Front-end development tools help developers build attractive website layouts and user interfaces quickly. Back-end tools deal with servers and databases.

Explanation

A cube of side x has volume x³ and six square faces, so its total surface area is 6x².

Explanation

In a DTD an element is declared as <!ELEMENT element-name category>. <!ATTLIST> declares attributes and <!ENTITY> declares entities.

Explanation

C is false: a monolithic kernel keeps user and kernel services in the same address space. A microkernel keeps them in separate address spaces.

Explanation

Sequential models such as the waterfall model are the oldest paradigms. They follow a linear flow, which often does not match changing real-world requirements.

Explanation

A leading 0 makes 017 an octal literal, which equals 15. The program prints 121 201 15, which is option (B) (its text shows a stray leading 1).

Explanation

Demand is perfectly elastic when a negligible change in price causes an infinite change in quantity demanded (a horizontal demand curve).

Explanation

A random-scan (vector) display moves the electron beam like a pencil, drawing only the lines of the picture. Raster scan sweeps the whole screen row by row.

Explanation

Range = largest − smallest = 101 − 6 = 95.

Explanation

A flowchart shows an algorithm graphically using standard symbols joined by arrows. Pseudocode is a text description.

Explanation

In a connectionless network service packets are called datagrams and the network a datagram network. Connection-oriented service uses a virtual-circuit network.

Explanation

JavaScript runs in the browser and is used to build the front end. PHP and Django are server-side, and SQL is for databases.

Explanation

IMAP servers listen on TCP port 143. Port 443 is HTTPS, 80 is HTTP and 20 is FTP data.

Explanation

Knowledge is the expertise and skills a person gains through experience or education, i.e. theoretical or practical understanding of a subject.

Explanation

Efficiency (ISO 9126) means the software makes optimal use of system resources, measured by time behaviour and resource behaviour.

Explanation

The Poisson distribution is discrete; it counts events in a fixed interval. Normal, log-normal and exponential distributions are continuous.

Explanation

In Mobile IP, the foreign agent is a router on the visited (foreign) network that serves the mobile node while it is attached there.

Explanation

chmod takes the permission changes (e.g. u+x or 755) and the file names to apply them to, as in chmod 755 file.txt.

Explanation

In a flowchart the rectangle is the process (processing) symbol. The diamond is a decision, the parallelogram is input/output and the oval is start/end.

Explanation

A Bezier curve is a spline defined by a set of control points, using polynomial (Bernstein) blending functions.

Explanation

Messages exchanged between transport entities in the transport layer are called segments (TPDUs). Packets belong to the network layer and frames to the data link layer.

Explanation

Microeconomics studies the behaviour of individual economic units such as a consumer, a household or a firm. Macroeconomics studies the economy as a whole.

Explanation

In Cohen-Sutherland clipping, a line that crosses (intersects) the window boundary is partially visible and must be clipped. Lines fully inside are accepted and lines fully outside are rejected.

Explanation

y points to x, so *y = 8. x * *y * x + *y = 8 × 8 × 8 + 8 = 512 + 8 = 520.

Explanation

A good OS should complete many jobs per unit time (high throughput) and finish each job quickly (low turnaround time).

Explanation

Knowledge refining adds value to collected knowledge by discovering relationships, abstracting and preparing it to be shared.

Explanation

A transposition cipher only rearranges the order of the letters and does not change them. A substitution cipher replaces letters, disguising them.

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In ASP.NET an event is an action or occurrence such as a click, key press, mouse movement or system notification that code can respond to.

Explanation

Interdependence means the parts of a business system are closely interacting and depend on each other.

Explanation

Interpolation is estimating y = f(x) for an x that lies between the given values x₀ and xₙ. Estimating outside this range is extrapolation.

Explanation

PHP is a server-side scripting language, so it is not a front-end tool. AngularJS, jQuery and Chrome DevTools are used for front-end work.

Explanation

The cycle is: transactions → journal → ledger → trial balance → adjustment entries → adjusted trial balance → closing entries → financial statements, as in (B).

Explanation

Parentheses ( ) (function call or grouping) have the highest precedence. * comes next, then !=, and ^ (bitwise XOR) is lower.

Explanation

The representational quality of information covers interpretability, ease of understanding, format and concise or consistent representation (coherence and compatibility).

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The DEFAULT constraint supplies a default value for a column when no value is given in an INSERT. NOT NULL, CHECK and UNIQUE do the other jobs.

Explanation

This is the AICPA definition of accounting, used for financial accounting: recording, classifying and summarising financial transactions in money terms and interpreting the results.

Explanation

A DOM parser loads the whole XML document into memory as a tree of objects. SAX is event-based and builds no tree.

Explanation

Packing, loading and shipping the goods to the buyer are part of the delivery/fulfilment step of the e-commerce process.

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NAND is NOT-AND, so its output is (xy)'. (x+y)' is NOR, x+y is OR and xy is AND.

Explanation

Sass (Syntactically Awesome Style Sheets) is one of the most widely used CSS extension (preprocessor) languages.

Explanation

Newton's divided difference formula works for unequally spaced xᵢ. Newton's forward/backward and Gauss formulas need equally spaced points.

Explanation

TDMA lets several users share one frequency channel by giving each user its own time slot.

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A counter stores, and may display, the number of times an event has occurred, usually counting clock pulses.

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A queue is FIFO (first in, first out), so the first element inserted is the first removed. A stack is LIFO.

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A Wi-Fi router is fixed in place but connects devices wirelessly, so it is a fixed and wireless device. A laptop is mobile, and a desktop is fixed and wired.

Explanation

A capitalist (free-market) economy depends on market forces with little or no government intervention. A socialist economy is controlled by the state.

Explanation

In a bus topology all stations connect to one common cable called the backbone.

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The routing algorithm in the network layer decides which output line an incoming packet goes to and maintains the routing tables.

Explanation

Strategic information supports long-term policy decisions about business objectives and how well they are being met. It is used by top management.

Explanation

A DRAM cell stores each bit as charge on a tiny capacitor (with one transistor), which must be refreshed regularly. SRAM uses flip-flops.

Explanation

Inline functions put the function body at the call site, which removes call overhead. This is useful mainly for small, frequently called functions.

Explanation

A tangent is perpendicular to the radius at the point of contact, so AO = √(40² + 150²) = √24100 ≈ 155.2 mm.

Explanation

The photoelectric effect is the emission of electrons from a metal surface when light of short enough wavelength (high enough frequency) falls on it.