UPSC CISF-AC-EXE Archives

21. Which one of the following is not a pointing device ?

Which one of the following is not a pointing device ?

Touchscreen

Trackball

Light pen

Scanner

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UPSC CISF-AC-EXE – 2023

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A pointing device is an input interface that allows the user to control a cursor or pointer on a screen or to select items. Out of the given options, a scanner is not a pointing device.

– **Touchscreen:** Allows direct pointing and interaction with the display by touch.
– **Trackball:** A stationary device where the user rolls a ball to move the pointer.
– **Light pen:** A device used to point at objects on a display screen or draw on it.
– **Scanner:** An input device that captures images or documents and converts them into digital form. It does not typically control a pointer on the screen.

Pointing devices are essential for graphical user interfaces (GUIs), enabling users to navigate, select, and manipulate objects on the screen. Scanners, while input devices, are primarily used for digitizing physical documents or images.

22. The result of binary addition of – 8 and – 2 in two’s complement form

The result of binary addition of – 8 and – 2 in two’s complement form is :

10110

0110

1110

0111

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UPSC CISF-AC-EXE – 2023

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To perform binary addition of -8 and -2 in two’s complement, we first need to represent these numbers in two’s complement form using a sufficient number of bits. Since the result -10 is needed, and the options suggest 4 or 5 bits, let’s use 5 bits as 4 bits is insufficient to represent -10 (-8 to +7 range for 4 bits).

– Convert positive 8 and 2 to binary (5 bits):
– 8 = 01000
– 2 = 00010
– Find two’s complement of 8 (for -8):
– Invert bits: 10111
– Add 1: 10111 + 1 = 11000 (This is -8 in 5-bit two’s complement)
– Find two’s complement of 2 (for -2):
– Invert bits: 11101
– Add 1: 11101 + 1 = 11110 (This is -2 in 5-bit two’s complement)
– Perform binary addition:
11000 (-8)
+ 11110 (-2)
——-
110110
– In 5-bit two’s complement addition, the carry-out from the most significant bit is discarded if the result is within the representable range. The result within 5 bits is 10110.
– To verify 10110, it is a negative number (starts with 1). Take two’s complement: Invert (01001), add 1 (01010). 01010 is 10 in decimal. Since it was negative, 10110 represents -10.

The sum -8 + (-2) = -10. The 5-bit two’s complement representation of -10 is 10110, which matches option A. If we had used 4 bits, -8 is 1000, -2 is 1110. 1000 + 1110 = 10110. Truncating to 4 bits gives 0110, which is +6, an incorrect result due to overflow/insufficient bits for the sum. Therefore, 5 bits is necessary and 10110 is the correct result in that format.

23. Which one of the following is not a network topology ?

Which one of the following is not a network topology ?

Bus

Star

Mesh

Peer-to-Peer

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UPSC CISF-AC-EXE – 2023

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Network topology refers to the physical or logical arrangement of connections within a computer network. Bus, Star, and Mesh are common network topologies. Peer-to-Peer (P2P) is a network model or architecture, not a topology.

– **Bus Topology:** All devices share a single communication line (bus).
– **Star Topology:** All devices are connected to a central hub or switch.
– **Mesh Topology:** Devices are interconnected with point-to-point links. Can be full mesh or partial mesh.
– **Peer-to-Peer:** In a P2P network model, devices (peers) directly share resources without a central server. This model can be implemented over different underlying network topologies.

Other network topologies include Ring topology, Tree topology, and Hybrid topology (combinations of others). Peer-to-Peer describes the relationship and communication flow between nodes, not their physical or logical arrangement.

24. Python is a :

Python is a :

High-level language

Assembly language

Machine language

Data definition language

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Python is a high-level programming language. High-level languages are designed to be more user-friendly and abstract away the complexities of hardware details.

– High-level languages use syntax that is closer to human language (like English) and require a compiler or interpreter to translate them into machine code.
– Examples include Python, Java, C++, etc.
– Assembly language and machine language are low-level languages, much closer to the hardware instructions.
– Data Definition Language (DDL) is a subset of SQL used for managing database structure, not a general programming language type.

Python is also known for being interpreted, general-purpose, dynamically-typed, and supporting multiple programming paradigms (like object-oriented, imperative, and functional). Its readability and extensive libraries make it popular for various applications, including web development, data science, AI, and automation.

25. Match List I with List II and select the correct answer using the code

Match List I with List II and select the correct answer using the code given below the Lists :

List I (Indian Navy Training Institute)	List II (INS)
A. Anti-Submarine Warfare School	1. INS Venduruthy, Kochi
B. NBCD School	2. INS Kunjali, Mumbai
C. Music Training School	3. INS Mandovi, Goa
D. Provost and Physical Training School	4. INS Shivaji, Lonavala

Code :

A-3, B-2, C-4, D-1

A-1, B-4, C-2, D-3

A-3, B-4, C-2, D-1

A-1, B-2, C-4, D-3

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UPSC CISF-AC-EXE – 2023

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Matching the Indian Navy Training Institutes with their respective locations/INS names:
– Anti-Submarine Warfare School: This school is located at INS Venduruthy in Kochi.
– NBCD School: The Nuclear, Biological, Chemical Defence School is located at INS Shivaji in Lonavala.
– Music Training School: This school is located at INS Kunjali in Mumbai.
– Provost and Physical Training School: This school is located at INS Mandovi in Goa.

– INS Venduruthy is the major base in Kochi that houses several training establishments.
– INS Shivaji in Lonavala is a technical training institute, particularly known for engineering disciplines and NBCD training.
– INS Kunjali is a naval base in Mumbai, home to various units including the Naval Band.
– INS Mandovi is a naval base in Goa, also hosting various training facilities including for Provost and PT.

Therefore, the correct matching is:
A. Anti-Submarine Warfare School – 1. INS Venduruthy, Kochi
B. NBCD School – 4. INS Shivaji, Lonavala
C. Music Training School – 2. INS Kunjali, Mumbai
D. Provost and Physical Training School – 3. INS Mandovi, Goa
This corresponds to option B.

26. Indo-Bhutan Border is guarded by which one among the following forces

Indo-Bhutan Border is guarded by which one among the following forces ?

Border Security Force (BSF)

Indo-Tibetan Border Police (ITBP)

Assam Rifles

Sashastra Seema Bal (SSB)

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UPSC CISF-AC-EXE – 2023

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Different paramilitary forces in India are assigned specific borders to guard. The Indo-Bhutan border is primarily guarded by the Sashastra Seema Bal (SSB).

– SSB (Sashastra Seema Bal) guards the India–Nepal and India–Bhutan borders.
– BSF (Border Security Force) guards the India–Pakistan and India–Bangladesh borders.
– ITBP (Indo-Tibetan Border Police) guards the India–China border (along with sections guarded by Assam Rifles).
– Assam Rifles guards the India–Myanmar border and parts of the India–China border in the North-East.

SSB was formed in 1963 and is one of India’s Central Armed Police Forces (CAPF). Its role on the Indo-Bhutan border includes preventing cross-border crimes, smuggling, and illegal infiltration, while also fostering friendly relations with the border population.

27. In June 2023, the Government of India set up an expert panel to recomm

In June 2023, the Government of India set up an expert panel to recommend reforms in the Arbitration and Conciliation Act, 1996 with an aim to reduce the burden on courts. The Committee is headed by who among the following ?

The incumbent Attorney General of India

The incumbent Law Secretary

A former Law Secretary

A retired Chief Justice of India

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In June 2023, the Government of India constituted an expert committee to review the institutional arbitration and conciliation mechanisms in the country and recommend reforms to the Arbitration and Conciliation Act, 1996.

– The committee was headed by Mr. T. K. Vishwanathan.
– T. K. Vishwanathan is a former Union Law Secretary.
– The committee’s mandate included proposing reforms to make India a hub for domestic and international arbitration.

The committee submitted its report in January 2024, recommending various amendments to the Act to streamline processes, reduce delays, and enhance party autonomy while ensuring judicial efficiency.

28. What is the name of the vehicle which NASA launched in November 2022 a

What is the name of the vehicle which NASA launched in November 2022 as part of a plan to eventually carry humans to the Moon ?

SWOT

Artemis

Insight Lander

SpaceX

This question was previously asked in

UPSC CISF-AC-EXE – 2023

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Artemis is NASA’s program aimed at returning humans to the Moon. As part of this program, the Artemis I mission was launched in November 2022.

– Artemis I was an uncrewed mission.
– It was the first integrated flight test of NASA’s Space Launch System (SLS) rocket and Orion spacecraft.
– The launch took place on November 16, 2022.
– The primary goal was to test the systems before carrying astronauts on future missions to the Moon.

– SWOT (Surface Water and Ocean Topography) is a satellite mission to observe Earth’s surface water, launched in December 2022.
– InSight Lander was a NASA robotic lander sent to study the interior of Mars, operational from 2018 to 2022.
– SpaceX is a private aerospace manufacturer and space transport services company, not a specific NASA vehicle launched in this context.

29. Who among the following was the winner of the Booker Prize in the year

Who among the following was the winner of the Booker Prize in the year 2022 ?

Douglas Stuart

Geetanjali Shree

Shehan Karunatilaka

Amitav Ghosh

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The Booker Prize is a prestigious literary award for the best English-language novel published in the United Kingdom or Ireland. In 2022, the prize was awarded to Shehan Karunatilaka.

– Shehan Karunatilaka is a Sri Lankan writer.
– He won the 2022 Booker Prize for his novel “The Seven Moons of Maali Almeida”.

– Douglas Stuart won the Booker Prize in 2020 for “Shuggie Bain”.
– Geetanjali Shree won the International Booker Prize in 2022 (shared with translator Daisy Rockwell) for “Tomb of Sand”. The International Booker Prize is for works translated into English.
– Amitav Ghosh is a renowned Indian writer, but he has not won the Booker Prize. He was shortlisted in 2008 for “Sea of Poppies”.

30. A man purchases 5 shirts in a ‘buy two, get five’ scheme. How much dis

A man purchases 5 shirts in a ‘buy two, get five’ scheme. How much discount percentage did he get ?

50%

60%

40%

45%

This question was previously asked in

UPSC CISF-AC-EXE – 2023

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The scheme is “buy two, get five”. In the context of retail promotions, this is usually interpreted as “pay for 2 items and receive 5 items in total”. Thus, the man receives 5 shirts by paying the price of only 2 shirts.

– Total number of shirts received = 5
– Number of shirts paid for = 2
– Number of free shirts received = 5 – 2 = 3
– The discount percentage is calculated based on the total number of items received at the discounted price compared to the original price of all items.
– Discount percentage = (Number of free items / Total number of items received) * 100

Let the price of one shirt be P.
The actual price of 5 shirts would be 5 * P.
Under the scheme, the man pays the price of 2 shirts, which is 2 * P, to get 5 shirts.
The amount of discount received is the price of the free shirts, which is 3 * P.
Discount percentage = (Discount amount / Original price of items received) * 100
Discount percentage = (3P / 5P) * 100 = (3/5) * 100 = 60%.