BPSC TRE 2.0 (2023) Computer Class 9-10 — Previous Year Paper

Explanation

'All the students' refers to the specific students of this school, so the definite article 'the' is used.

Explanation

'Actress' begins with a vowel sound and is mentioned for the first time, so the indefinite article 'an' is used.

Explanation

Godavari and Ganga are rivers, while the Bay of Bengal is a part of the sea, so it is the one that is not a river.

Explanation

A sofa set belongs in a drawing room, but a washing machine and a chimney do not, so more than one option is correct.

Explanation

Yesterday was Saturday, so the day before yesterday was Friday.

Explanation

November comes after October, which is not among options A-C, so the answer is None of the above.

Explanation

A husband's brother is the wife's brother-in-law (devar/jeth).

Explanation

The parents of one's mother are called the maternal grandparents.

Explanation

'झुकाव' में 'आव' और 'उल्लेखनीय' में 'नीय' प्रत्यय लगा है, जबकि 'भावविह्वल' (भाव + विह्वल) में कोई प्रत्यय नहीं है।

Explanation

आधिकारिक कुंजी के अनुसार विकल्प (C) सही है: भाषा विचार या भाव प्रकट करने का साधन है।

Explanation

'अ' एक मात्रा के समय में बोला जाता है, इसलिए यह ह्रस्व स्वर है; 'आ' और 'ई' दीर्घ स्वर हैं।

Explanation

उच्चारण-स्थान के आधार पर (कंठ्य, तालव्य, मूर्धन्य, दंत्य, ओष्ठ्य आदि) व्यंजनों के आठ भाग माने गए हैं; कुंजी (C) है।

Explanation

जिन व्यंजनों में हवा का बल कम लगता है वे अल्पप्राण हैं। 'च' अल्पप्राण है, 'ख' और 'छ' महाप्राण हैं।

Explanation

ग, ज और ध तीनों घोष (सघोष) ध्वनियाँ हैं, इसलिए एक से अधिक विकल्प सही हैं।

Explanation

प, फ और म तीनों 'प' वर्ग के स्पर्श व्यंजन हैं, इसलिए एक से अधिक विकल्प सही हैं।

Explanation

'अग्नि' से बना विशेषण 'आग्नेय' है।

Explanation

जिस व्यंजन के उच्चारण में जीभ काँपती है वह प्रकंपी कहलाता है; 'र' प्रकंपी व्यंजन है।

Explanation

'य' और 'व' दोनों अर्धस्वर हैं, इसलिए एक से अधिक विकल्प सही हैं।

Explanation

चवर्ग (च, छ, ज, झ, ञ) में छ्, ज् और झ् तीनों आते हैं, इसलिए एक से अधिक विकल्प सही हैं।

Explanation

विहंग और खग 'पक्षी' के पर्याय हैं; केकी का अर्थ मोर और पिक का अर्थ कोयल है।

Explanation

तीनों वाक्य शुद्ध हैं, इसलिए कोई भी अशुद्ध नहीं है और उत्तर 'उपर्युक्त में से कोई नहीं' है।

Explanation

रचना के आधार पर वाक्य के भेद सरल, संयुक्त और मिश्र हैं; 'उपवाक्य' वाक्य का भेद नहीं, वाक्य का अंश है।

Explanation

न्यूनता या लघुता का बोध कराने वाले शब्द ऊनार्थक शब्द कहलाते हैं।

Explanation

बिना बुलाए आने वाले के लिए एक शब्द 'अनाहूत' है।

Explanation

माप-तौल (मात्रा) बताने वाले विशेषण परिमाणवाचक विशेषण कहलाते हैं।

Explanation

'जल' के खंड करने पर कोई सार्थक अंश नहीं मिलता, इसलिए यह रूढ़ शब्द है।

Explanation

दोहा और सोरठा दोनों मात्रिक छंद हैं (इंद्रवज्रा वर्णिक है), इसलिए एक से अधिक विकल्प सही हैं।

Explanation

इसमें राम को बाल सूर्य, मंच को उदयगिरि और संतों को कमल कहकर अभेद बताया गया है, इसलिए रूपक अलंकार है।

Explanation

From 2b + 20g = 4200, b = 2100 - 10g. Then 5(2100 - 10g) + 18g = 6500 gives 32g = 4000, so g = 125 and b = 850.

Explanation

Profit = 820 - 615 = 205, so profit % = 205/615 × 100 = 33·33%.

Explanation

First two digits: 6 choices each (3 to 8), third digit: 10 choices, fourth: 2 choices, so 6 × 6 × 10 × 2 = 720 attempts.

Explanation

Area = ½·8·9·sin θ = 12√5 gives sin θ = √5/3, so cos θ = ±2/3. The third side c² = 64 + 81 - 144cos θ = 49 (for cos θ = 2/3), so c = 7 cm.

Explanation

The mean of (53 - x) is 53 - (mean of x) = -3·5, so the mean of the given numbers is 53 + 3·5 = 56·5.

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Let the ages be 4k and 3k. Then 4k - 3k = 6, so k = 6 and the ages are 24 and 18.

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The product is (1/2)(2/3)(3/4)…((n-1)/n); every numerator cancels the previous denominator, leaving 1/n.

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Sum of roots = 3 and product = -4, so the equation is x² - 3x - 4 = 0.

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Aditya-L1 is placed in a halo orbit around the Sun-Earth Lagrange point L1, from where it observes the Sun continuously.

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Nodes and internodes are characteristic of stems and are absent in roots; ginger has them, so it is a stem.

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In water the relative refractive index of the glass falls, so the lens bends light less; it remains convex but its focal length becomes greater than 10 cm.

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Fog droplets are transparent, but they scatter most of the light in all directions, so light from distant objects does not reach the eye and the fog looks opaque.

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The frequency of light is fixed by its source and stays the same across media, whereas velocity (and wavelength) change.

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In Bohr's model the electron speed in the first orbit is αc, where the fine-structure constant α ≈ 1/137, i.e. c/137.

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By Stefan's law, radiated energy is proportional to T⁴, so at T/3 it becomes E/3⁴ = E/81.

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Citric acid (C₆H₈O₇) can be oxidised by acidic KMnO₄, which decolourises the purple permanganate; acetic and propanoic acids are not oxidised under these conditions.

Explanation

‘Banglar Mati, Banglar Jal’ was written by Rabindranath Tagore in 1905 as a protest against the Partition of Bengal.

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The new Parliament building (inaugurated May 2023) was designed by Bimal Patel of HCP Design.

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Anurag Kashyap's 'Kennedy' had its midnight screening at the 76th Cannes Film Festival in May 2023.

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Azali Assoumani is the President of Comoros and was the African Union chair in 2023.

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Human Rights Day is observed every year on 10 December, the day the UN General Assembly adopted the Universal Declaration of Human Rights in 1948.

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The first Indian National Army was founded in 1942 by Mohan Singh with Japanese help; Subhash Chandra Bose took over and revived it in 1943.

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The Tana Bhagat movement (from 1914, Chotanagpur) was led by the Oraon tribals, so it was a tribal movement.

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Official key: (C) Bihar, where Raksha Bandhan is observed as a day for protecting trees by tying rakhis on them.

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Black (regur) soil occurs in the Deccan lava region, including both Karnataka and Gujarat, so more than one option is correct.

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India has roughly 81,000 species of fauna and 47,000 species of flora.

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Minerals such as coal, iron ore and gypsum accumulate in the layers (strata) of sedimentary rocks.

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Pulses (gram, arhar, etc.) belong to the legume family; jowar and millets are cereals.

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The East-West Corridor of the NHDP runs from Silchar (Assam) in the east to Porbandar (Gujarat) in the west.

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They are deposits of dripping calcium-rich water in limestone caves, i.e. work of underground water.

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22 April is World Earth Day; World Health Day is 7 April and World Ozone Day is 16 September.

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The Survey of India, the national mapping agency, prepares India's topographical maps.

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V. D. Savarkar used this phrase in his 1909 book 'The Indian War of Independence, 1857'.

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The Santhal Rebellion was in 1855-56, the Birsa Munda rebellion in 1899-1900 and the Tana Bhagat movement in 1914, so the Santhal Rebellion came first.

Explanation

Anandamath is set against the Sannyasi rebellion (Sannyasi-Fakir revolt) of late 18th-century Bengal.

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Swadeshi and Boycott were first used as methods of protest during the anti-Partition of Bengal agitation of 1905.

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C. R. Das presided over the 1922 Gaya session of the Congress.

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Swami Vidyanand led the peasant movement in Darbhanga (Bihar) during the Non-Cooperation Movement.

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Hindu College, Calcutta (1817) was founded by David Hare with Raja Ram Mohan Roy and Radhakanta Deb; Derozio taught there.

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Lord Curzon made this remark in 1900 about the Congress.

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The CPU fetches, decodes and executes instructions and controls the other parts, so it is called the brain of the computer.

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Fifth-generation computers are marked both by technological advancement (AI, parallel processing) and by object-oriented programming, so more than one option applies.

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Open-source software makes its source code freely available to view, change and redistribute.

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Machine language depends on the processor, is hard to write and is error prone, so all of A, B and C hold (more than one).

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Assembly language uses mnemonics close to the hardware, so it is a low-level language.

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A compiler translates the whole high-level source program into machine code and is not part of the execution itself, so A, B and C are all true (more than one).

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C++ is an object-oriented language that builds a program from small objects and classes upward, which is the bottom-up approach.

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Virtual inheritance makes derived classes share one copy of a common base class, which avoids duplicate copies in diamond-shaped inheritance.

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delete frees a single object, while delete[] frees an array of objects (and calls each destructor).

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Code that may raise an exception is placed inside a try block so that a matching catch block can handle it.

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Inline functions are meant for small, simple functions; saying they are generally very large and complicated is incorrect.

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An abstract class is a base class that has at least one pure virtual function, so it cannot be instantiated.

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If a class defines no constructor at all, the compiler supplies a default constructor.

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In C++ the members of a struct are public by default, while those of a class are private by default.

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A pure object-oriented language needs encapsulation, inheritance and polymorphism together, so more than one option is correct.

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A language that lets the programmer define new data types is called extensible.

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C++ was created by Bjarne Stroustrup at Bell Labs.

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None of the listed forms is valid C++ (the correct usage is cin.get(ch)), so the answer is None of the above.

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Array indices start at 0, so the nth element is array[n-1].

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C++ arrays are classified as one-dimensional and multi-dimensional, i.e. two types, as the official key accepts.

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rank() reports the number of dimensions of an array type.

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A variable declared inside a function is local and visible only within that function's { } block.

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is_array checks whether the given type or variable is an array.

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All three statements are true (new is an operator that calls constructors; malloc is a function returning void*), so more than one option, i.e. (D), is correct.

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Private members are inherited by a derived class but cannot be accessed directly from it.

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Object-oriented languages also use run-time (virtual) binding, so I is false; in procedural languages every call is resolved at compile time, so only II is true.

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An unnamed class is allowed, but a destructor is declared with the class name, so such a class cannot declare a destructor; the official key is (C).

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Templates (along with overloading) are resolved at compile time, so they implement compile-time polymorphism; virtual functions give run-time polymorphism.

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Bundling data and the functions that work on it into one unit is encapsulation.

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Modularity means splitting a program into small independent modules.

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Stacks are used for string reversal and backtracking; asynchronous data transfer is handled with queues (buffers), so it is not a stack application.

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B*C becomes *BC, and A + (B*C) in prefix is +A*BC.

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The conversion holds operators on a stack while scanning the expression, so a stack is needed.

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Spatial locality relies on elements being stored in contiguous memory, which is exactly how arrays are laid out.

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Before dequeuing, one must check that the queue is not empty, i.e. underflow.

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Balancing of symbols (parentheses) is done with a stack, not a queue.

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Preorder, inorder and postorder are all binary-tree traversals, so none of A-C is the odd one out.

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An array is a container that stores elements of the same type.

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A circular queue is also called a ring buffer.

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A circular queue reuses the freed slots at the front, which avoids wasting memory.

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A binary heap gives O(log n) insertion and removal of the highest-priority item, better than a list or array.

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Recursive calls are kept in the call stack, so the stack is used.

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In a red-black tree the root is black and a newly inserted non-root node is coloured red, so both A and B hold (more than one).

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In a singly linked list the node before the tail must be found by traversing the whole list, so deleting from the rear takes O(N).

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Depending on whether rear points at the last used slot or one past it, both rear = MAX_SIZE-1 and rear = MAX_SIZE are accepted overflow conditions, so more than one is correct.

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Merge sort splits the list in halves, sorts them and merges, which is divide and conquer.

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A database is an organised collection of data that can be accessed, updated and managed.

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A database can hold images, text/files and audio or video data, so more than one option is correct.

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Network and distributed are standard database types; 'decentralized' is not a classical database type.

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Microsoft Access and IBM Db2 are DBMS products; Google is a search engine company, not a DBMS.

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A DBMS supports many users at once, so 'single-user access only' is not a feature.

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Databases manipulate and secure data; analysing code is not a database function.

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Data that describes other data is called metadata.

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A DBMS sits between the database applications (users' programs) and the stored database.

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A superkey is any set of attributes that together uniquely identify a record.

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'DELETE FROM teaches;' removes all rows (values) of the relation; the other forms are wrong or remove different things.

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In the SQL hierarchy, the top level is made of catalogs, each of which can contain schemas.

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In SQL Server the db_accessadmin role can add or remove user IDs (access) for a database.

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Folders inside filing cabinets form a tree of parent and child containers, which is the hierarchical model.

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The HAVING clause filters groups after GROUP BY and may use aggregate functions.

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Only III (process organization) is not a DBMS utility, but none of the options A-C lists exactly that, so the answer is None of the above.

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Third normal form (3NF) is generally considered adequate for a normal relational design.

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Duplicate storage wastes space and, if one copy is changed, makes the copies inconsistent; option A states both.

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RAW stores unstructured binary data in a column; Numeric and VARCHAR hold structured numbers and text.

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XNOR gives output 1 when both inputs are equal.

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Boolean algebra is used in digital computer design, logic symbols and circuit theory, so more than one option is correct.

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Data flows only from the keyboard to the computer, which is simplex transmission.

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X + Y + XY = X + Y, and (X + Y)(X + Z) = X + YZ by the distributive law.

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The dual is formed by swapping 0 and 1 and also swapping + with '.', without complementing the variables.

Explanation

Radio waves, microwaves and infrared are all wireless media, so more than one option is correct.

Explanation

A switched network sends frames only to the intended port, which makes packet sniffing much harder than on a shared medium.

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In time-division multiplexing each slot is further divided into frames.

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TCP is connection-oriented, sets up a connection with a three-way handshake and takes data from the application as one stream, so A, B and C all hold.

Explanation

The endpoint of a communication flow between processes over a network is a socket.

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Optical fibre carries data as light and offers the highest speed and bandwidth of these media.