← Assistant & UDC
Past Questions — 2021
Rajendra Kumar Bhandari has been selected by which ministry for the Subhash Chandra Bose Aapda Prabandhan Puraskar 2021?
A)
Ministry of Education
B)
Ministry of Home Affairs
C)
Ministry of DoNER
D)
Ministry of Defense
Rajendra Kumar Bhandari was selected for the Subhash Chandra Bose Aapda Prabandhan Puraskar 2021 by the Ministry of Home Affairs. This national award for disaster management is administered under the Government of India through the Ministry of Home Affairs. Therefore, option (b) is correct. The other ministries listed are not responsible for this award.
An instrument used for measuring depth of an ocean is called?
A)
Hydrometer
B)
Hygrometer
C)
Fathometer
D)
Galvanometer
A fathometer is an instrument used to measure the depth of water, especially the depth of the ocean or sea, by using sound waves (echo sounding). Hence option (c) is correct. The other options are incorrect because a hydrometer measures the relative density of liquids, a hygrometer measures humidity in air, and a galvanometer measures small electric currents.
A horse is tied to a peg at one corner of a square shaped grass field of side 15 m by means of a 10 m long rope. The area of that part of the field in which the horse can graze is –
A)
72.5 m2
B)
73.2 m2
C)
74.65 m2
D)
78.57 m2
The horse is tied at a corner of the square field, so it can graze only in a quarter-circle of radius 10 m inside the field. Since the side of the field is 15 m, the full quarter-circle fits inside the field because 10 < 15. Therefore, grazed area = (1/4) × pi × r^2 = (1/4) × pi × 10^2 = 25pi ≈ 78.57 m2. Hence, option (d) is correct. The other options do not match the area of the quarter-circle.
One Gigabyte is approximately equal to -
A)
1000,000 bytes
B)
1000,000,000 bytes
C)
1000,000,000,000 bytes
D)
1000,000,000,000,000 bytes
In computer storage, 1 Gigabyte (GB) is approximately taken as 1,000,000,000 bytes in general usage (decimal system). Therefore option (b) is correct.
Why others are incorrect:
- (a) 1000,000 bytes = about 1 Megabyte, not Gigabyte.
- (c) 1000,000,000,000 bytes = about 1 Terabyte.
- (d) 1000,000,000,000,000 bytes = about 1 Petabyte.
In which of the following form, data is stored in a Computer?
A)
Decimal
B)
Binary
C)
Hexa Decimal
D)
Octal
A computer stores and processes data internally in binary form, using only two digits: 0 and 1. These correspond to the electronic states used by digital circuits. Decimal, hexadecimal, and octal are number systems mainly used by humans for reading or representing values, but the actual stored form inside the computer is binary. Therefore, option (b) is correct.
Which of the following is also known as the ‘Great Circle’?
A)
Tropic of Cancer
B)
Tropic of Capricorn
C)
Equator
D)
Pacific Ring of Fire
A great circle is an imaginary circle on a sphere whose plane passes through the centre of the sphere. On Earth, the Equator is the most important great circle because it divides the Earth into the Northern and Southern Hemispheres.
Why others are incorrect: Tropic of Cancer and Tropic of Capricorn are smaller circles, not great circles, because they do not pass through the Earth's centre. Pacific Ring of Fire is a volcanic and seismic belt, not a circle of latitude.
The world’s largest vaccine manufacturer by volume is
A)
Moderna, USA
B)
Pfizer, USA
C)
Serum Institute of India
D)
AstraZeneca
The Serum Institute of India is widely recognized as the world’s largest vaccine manufacturer by volume, producing a very large number of doses annually. Therefore, option (c) is correct. Moderna and Pfizer are major pharmaceutical companies but are not the largest vaccine manufacturers by volume. AstraZeneca is also a major global company, but it is not the largest by vaccine production volume.
Which state government has exempted road tax and registration fee on purchase of various kinds of electric vehicles running on batteries, instead of fuel?
A)
Maharashtra
B)
Kerala
C)
Madhya Pradesh
D)
Telangana
The correct answer is Telangana. In 2020, the Telangana government announced exemption of road tax and registration fee for battery-operated electric vehicles to promote EV adoption.
Why others are incorrect:
- Maharashtra: It announced incentives for EVs, but this specific exemption statement is not identified with Maharashtra in this question.
- Kerala: Kerala promoted electric mobility, but the cited exemption is not the one commonly associated here.
- Madhya Pradesh: It also introduced EV policies later, but this particular current affairs item refers to Telangana.
The India captain Virat Kohli became the first cricketer in the world to have 100 million followers on which of the following social media platforms?
A)
Facebook
B)
Twitter
C)
Tiktok
D)
Instagram
Virat Kohli became the first cricketer in the world to cross 100 million followers on Instagram in 2021. Therefore, option (d) is correct.
Why others are incorrect:
- Facebook: He was not reported for crossing 100 million followers there.
- Twitter: His follower count was much lower than 100 million.
- Tiktok: Virat Kohli was not known for reaching this milestone on TikTok.
Kunga earns Rs 16000 per month. He spends 1/4 of his income on food, 3/10 of the remainder on house rent and 5/21 of the remainder on the education of children. How much money is still left with him?
A)
Rs 6100
B)
Rs 6200
C)
Rs 6400
D)
Rs 6500
Monthly income = Rs 16000. He spends 1/4 on food = 16000 × 1/4 = Rs 4000, so remainder = Rs 12000. Then he spends 3/10 of the remainder on house rent = 12000 × 3/10 = Rs 3600, so remainder = Rs 8400. Then he spends 5/21 of the remainder on education = 8400 × 5/21 = Rs 2000, so money left = 8400 - 2000 = Rs 6400. Therefore, the correct mathematical answer is Rs 6400, which matches option (c).
A device that allows computer users to communicate with one another over telephone lines is called
A)
Microprocessor
B)
Network
C)
Modem
D)
Assembler
A modem (Modulator-Demodulator) is a device that enables computers to communicate over telephone lines by converting digital signals into analog signals and vice versa. Hence, option (c) is correct.
Why others are incorrect:
(a) Microprocessor: It is the CPU chip used for processing instructions, not for telephone line communication.
(b) Network: A network is a system of connected computers, not the specific device used over telephone lines.
(d) Assembler: It is a program that translates assembly language into machine code, not a communication device.
The sum of three numbers is 98. If the ratio between the first and the second number be 2 : 3 and between the second and the third number be 5 : 8, then the second number is –
A)
25
B)
30
C)
35
D)
38
Let the three numbers be A, B, and C.
Given:
A : B = 2 : 3, so A = 2x and B = 3x.
B : C = 5 : 8, so B = 5y and C = 8y.
To make B common, take LCM of 3 and 5 = 15.
So, let B = 15k.
Then from A : B = 2 : 3, A = 10k.
And from B : C = 5 : 8, C = 24k.
Thus the three numbers are 10k, 15k, and 24k.
Their sum is:
10k + 15k + 24k = 49k = 98
So, k = 2.
Therefore, the second number = 15k = 30.
Hence, the correct option is (b).
Winner of the FIFA Best Men’s Player Award 2020 is
A)
Cristiano Ronaldo
B)
Robert Lewandowski
C)
Lionel Messi
D)
Neymar
The FIFA Best Men’s Player Award 2020 was won by Robert Lewandowski of Bayern Munich and Poland. He was awarded for his outstanding performance during the 2019–20 season, in which he played a key role in Bayern Munich’s success. Hence, option (b) is correct. Cristiano Ronaldo, Lionel Messi, and Neymar were not the winners of this award in 2020.
Who wrote the book ‘India a vision for 2020’?
A)
Manmohan singh
B)
Khuswant singh
C)
APJ Abdul Kalam
D)
K.Radakrishnan
The book ‘India 2020: A Vision for the New Millennium’ is associated with Dr. A.P.J. Abdul Kalam, who co-authored it with Y.S. Rajan. Therefore, among the given options, APJ Abdul Kalam is the correct answer. The other options are incorrect because Manmohan Singh was an economist and former Prime Minister, Khushwant Singh was a noted writer but did not write this book, and K. Radhakrishnan is not the author of this title.
In the Union budget 2021-22, how much amount of money has been set aside for COVID-19 vaccine during the period 2021-22?
A)
Rs 25,000 crores
B)
Rs 35,000 crores
C)
Rs 45,000 crores
D)
Rs 55,000 crores
In the Union Budget 2021-22, Finance Minister Nirmala Sitharaman announced that Rs 35,000 crore was provided for COVID-19 vaccination, with a commitment to provide more if required. Therefore, option (b) is correct. The other options are incorrect because the budget speech specifically mentioned Rs 35,000 crore, not Rs 25,000 crore, Rs 45,000 crore, or Rs 55,000 crore.
The name ‘sorrow of Bihar’ is given to:
A)
Jaldak
B)
Kosi
C)
Gandak
D)
Tista
Kosi is known as the 'Sorrow of Bihar' because it frequently changes its course and causes devastating floods in Bihar. Hence, option (b) is correct. The other rivers listed are not commonly known by this title.
Chami’s mother is four times as old as Chami. After 5 years, her mother will be three times as old as she will be then. The present age of Chami is –
A)
10 years
B)
12 years
C)
14 years
D)
15 years
Let Chami’s present age be x years. Then her mother’s present age is 4x years. After 5 years, their ages will be x + 5 and 4x + 5 respectively. According to the question, after 5 years the mother will be three times Chami’s age: 4x + 5 = 3(x + 5). Solving, 4x + 5 = 3x + 15, so x = 10. Therefore, Chami’s present age is 10 years. Hence option (a) is correct.
The value of 4 (625)3 is -
A)
25
B)
55
C)
75
D)
125
Interpret 4 (625) 3 as asking for the root of 625 using the outside numbers as indices: 625 = 5^4, and the required value is the 4th root pattern, which gives 5^2 = 25. Also, 625 itself equals 25 × 25, so the matching option is 25. Hence the correct answer is option (a).
The average age of a committee of 8 members is 40 years. A member, aged 55 years, retired and he was replaced by a member aged 39 years. The average age of the present committee is –
A)
35 years
B)
36 years
C)
37 years
D)
38 years
Initial total age of 8 members = 8 × 40 = 320 years. One member aged 55 retired, so remaining total = 320 − 55 = 265 years. A new member aged 39 joined, so new total = 265 + 39 = 304 years. New average = 304 ÷ 8 = 38 years. Hence, the correct answer is option (d) 38 years. Options (a), (b), and (c) are incorrect because they do not match the calculated average.
The number of Electoral College votes won by Joe Biden to become the president of USA is
A)
275
B)
306
C)
327
D)
372
Joe Biden won 306 Electoral College votes in the 2020 U.S. presidential election, defeating Donald Trump who won 232. Therefore, option (b) is correct. The other options—275, 327, and 372—do not match the official Electoral College result.
Which of the following was sworn-in as the new Chief Executive Member (CEM) of Lai Autonomous District Council (LADC) in Mizoram on December 2020?
A)
Ngunlianchunga
B)
Lallawmsanga Apetow
C)
T.Zakunga
D)
Manghmunga Chinzah
The new Chief Executive Member (CEM) of the Lai Autonomous District Council (LADC) who was sworn in during December 2020 was **Ngunlianchunga**. Therefore, option **(a)** is correct.
Why others are incorrect:
- **(b) Lallawmsanga Apetow** – not the person sworn in as LADC CEM in December 2020.
- **(c) T. Zakunga** – not the CEM sworn in at that time.
- **(d) Manghmunga Chinzah** – also not the person appointed/sworn in as the new CEM in December 2020.
Lala saves Rs 5 in first week of the year and then increased his weekly savings by Rs 2.50 each week. In what week will his weekly savings be Rs 137.50?
A)
In 50th week
B)
In 52nd week
C)
In 53rd week
D)
In 54th week
Lala’s weekly savings form an arithmetic progression: 5, 7.50, 10, ... where first term a = 5 and common difference d = 2.50. We need the week when savings become 137.50. Using nth term: a_n = a + (n - 1)d. So, 137.50 = 5 + (n - 1)(2.50). Therefore, 132.50 = (n - 1)(2.50), giving n - 1 = 53 and n = 54. Hence, his weekly savings will be Rs 137.50 in the 54th week. Therefore, option (d) is correct. Options (a), (b), and (c) give smaller amounts than Rs 137.50.
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