← Assistant & UDC
Past Questions
In a laboratory, the count of bacteria in a certain experiment was increasing at the rate of 2% per hour. If the count of bacteria initially was 50000, then at the end of 2 hours it will increase to
A)
52000
B)
52020
C)
52040
D)
52050
The bacteria count grows by 2% per hour, so this is compound growth.
Initial count = 50000
After 1 hour = 50000 × 1.02 = 51000
After 2 hours = 51000 × 1.02 = 52020
So the correct answer is 52020.
Why others are incorrect:
(a) 52000 ignores compounding and is slightly less.
(c) 52040 is higher than the actual compounded value.
(d) 52050 is also higher than the correct result.
A shopkeeper purchased 200 bulbs for ` 10 each. However 5 bulbs were defective. The remaining bulbs were sold @ ` 12 each. The gain or loss percentage is
A)
10%
B)
12%
C)
17%
D)
20%
Cost price of 200 bulbs = 200 × 10 = ₹2000.
Out of 200 bulbs, 5 were defective, so bulbs sold = 195.
Selling price of 195 bulbs = 195 × 12 = ₹2340.
Gain = 2340 - 2000 = ₹340.
Gain % = (340 / 2000) × 100 = 17%.
Therefore, the correct option is (c) 17%.
Why others are incorrect:
(a) 10% → actual gain is higher than 10%.
(b) 12% → does not match the computed gain percentage.
(d) 20% → would require a gain of ₹400, but actual gain is ₹340.
According to State of the world’s forest report 2020, more than half of the world’s forests are found in only five countries namely the Russian Federation, China, Canada, the United States of America and ___
A)
Greenland
B)
India
C)
Saudi Arabia
D)
Brazil
The FAO’s *State of the World’s Forests 2020* states that more than half of the world’s forests are located in just five countries: the Russian Federation, Brazil, Canada, the United States of America, and China. Therefore, the missing country is Brazil. The other options are incorrect because Greenland, India, and Saudi Arabia are not among the top five countries by total forest area.
According to the Economic Survey of Mizoram 2020-2021, the service or tertiary sector contributes how many percent to the Gross State Domestic Product?
A)
35.7 per cent
B)
43.28 per cent
C)
56.04 per cent
D)
67.5 per cent
According to the Economic Survey of Mizoram 2020-2021, the service (tertiary) sector contributes 56.04% to the Gross State Domestic Product (GSDP). The other figures correspond to different sectors or are not the tertiary sector share. Hence, option (c) is correct.
If 2x - y=4, then 6x - 3y= ?
A)
15
B)
12
C)
18
D)
10
Given 2x - y = 4. Multiply both sides by 3:
3(2x - y) = 3 × 4
6x - 3y = 12
So the correct answer is option (b) 12.
Why others are incorrect: 15, 18, and 10 do not equal 3 times the given equation.
A train runs at 45 km/h. How far does it go in 6seconds
A)
75m
B)
80m
C)
7.5m
D)
100m
Speed = 45 km/h = 45 × (5/18) m/s = 12.5 m/s. दूरी in 6 seconds = speed × time = 12.5 × 6 = 75 m. इसलिए सही उत्तर 75m है. अन्य विकल्प इस गणना से मेल नहीं खाते.
The SI unit of temperature is
A)
Temperature
B)
Ampere
C)
Watt
D)
Kelvin
The SI base unit of thermodynamic temperature is kelvin (K).
- (a) Temperature is a physical quantity, not a unit.
- (b) Ampere is the SI unit of electric current.
- (c) Watt is the SI unit of power.
Therefore, the correct answer is Kelvin.
Which country received the first batch of free vaccine from India as part of India’s initiative to deliver Covid-19 vaccines to friendly countries?
A)
Nepal
B)
Bhutan
C)
Sri Lanka
D)
Myanmar
India’s first free consignment of Covid-19 vaccines under its vaccine diplomacy initiative was sent to Bhutan on 20 January 2021. Bhutan received the first batch because India prioritized nearby friendly countries in the initial phase. Therefore, option (b) Bhutan is correct. Nepal, Sri Lanka, and Myanmar received vaccine supplies later.
Which of the following has agreed to cut greenhouse gas emissions by 55 percent by 2030?
A)
G-7 countries
B)
European Union
C)
BRICS
D)
OPEC countries
The European Union agreed to reduce greenhouse gas emissions by at least 55% by 2030 compared to 1990 levels as part of its climate target. The other options do not match this specific collective commitment: G-7, BRICS, and OPEC have no such unified 55% cut agreement.
Sardal Patel Stadium was recently renamed as
A)
Abdul Kalam Cricket Stadium
B)
Sardar Patel Cricket Stadium
C)
Indira Gandhi Cricket Stadium
D)
Narendra Modi Cricket Stadium
Sardar Patel Stadium in Ahmedabad was renamed as Narendra Modi Cricket Stadium. This was the new name adopted for the Motera stadium complex. Therefore, option (d) is correct. The other options are not the renaming used for this stadium.
Ngozi Okonjo-Iweala is the new director-general of
A)
WTO
B)
IMF
C)
World Bank
D)
UNO
Ngozi Okonjo-Iweala became the Director-General of the World Trade Organization (WTO). She was selected in 2021 and is the first woman and the first African to head the WTO. The other options are incorrect because she was not appointed to the IMF, World Bank, or UNO.
The diameter of the wheel is 70cm. It moves slowly along a road. How far will it go in 5 revolutions?
A)
350cm
B)
1100cm
C)
2200cm
D)
1000cm
Distance covered in one revolution = circumference of the wheel = πd. Here d = 70 cm, so circumference = 70 × 22/7 = 220 cm. In 5 revolutions, distance = 220 × 5 = 1100 cm. Hence, option (b) is correct. The other options do not match the calculated total distance.
Winner of National Award for Best electoral Practices 2020 is
A)
Sikkim
B)
Meghalaya
C)
Mizoram
D)
Nagaland
The National Award for Best Electoral Practices for 2020 was awarded to Mizoram. Hence, option (c) is correct. The other states listed were not the winner for this award in 2020.
Which of the followings is the new Mayor of Aizawl Municipal Corporation (AMC)?
A)
Lalhmingthanga
B)
Lalrinliana Sailo
C)
Rosiamngheta
D)
Lalrinenga Sailo
The new Mayor of the Aizawl Municipal Corporation (AMC) is Lalhmingthanga. The other names listed were associated with other local political roles or are not the correct mayor in this context.
Who recently became the brand ambassador of Unacademy, Inida’s largest online learning app?
A)
Amitabh Bachchan
B)
Deepika Padukne
C)
Amir Khan
D)
Sachin Tendulkar
Unacademy announced Sachin Tendulkar as its brand ambassador. Among the given options, this matches option (d). Amitabh Bachchan, Deepika Padukone, and Aamir Khan are not the correct choices for this announcement.
Scotland is also known as
A)
Land of Cakes
B)
Land of Golden Fleece
C)
Land of Maple
D)
Land of Morning Calm
Scotland is popularly called the "Land of Cakes". This is a traditional nickname referring to Scotland's association with oatcakes and other baked foods. The other options are nicknames of different places: "Land of Golden Fleece" refers to Australia, "Land of Maple" refers to Canada, and "Land of Morning Calm" refers to Korea.
The probability that an ordinary year has 53 Sundays is
A)
1/52
B)
1/7
C)
1/53
D)
53/365
An ordinary year has 365 days = 52 weeks + 1 day. So every weekday occurs 52 times, and one extra day occurs once more. The year will have 53 Sundays only if that extra day is Sunday. Since the extra day can be any one of the 7 weekdays with equal probability, the probability is 1/7. Hence option (b) is correct. Option (a) 1/52, option (c) 1/53, and option (d) 53/365 are incorrect because they do not match the weekday-based probability logic.
Malabar Naval Exercise is between India,USA and which one of the following countries?
A)
Australia
B)
Japan
C)
Sri Lanka
D)
Russia
The Malabar Naval Exercise began as a bilateral naval exercise between India and the USA, and Japan became a permanent member later. So the exercise is now held among India, the USA, and Japan. Hence, the correct option is (b) Japan. Australia, Sri Lanka, and Russia are not part of the standard Malabar grouping.
What does RAM in a computer stands for?
A)
Read Analysis Memory
B)
Rapid Action Monitor
C)
Random Access Memory
D)
Rapid Access Memory
RAM stands for Random Access Memory. It is the computer’s main temporary memory used to store data and instructions currently being processed by the CPU.
Why others are incorrect:
(a) Read Analysis Memory — not a standard computer term.
(b) Rapid Action Monitor — unrelated to memory.
(d) Rapid Access Memory — commonly confused, but not the correct expansion of RAM.
The printed output from a computer is called
A)
Soft Copy
B)
Hard Copy
C)
Paper copy
D)
Print copy
Printed output from a computer is called a hard copy because it is a physical, tangible form of output on paper. A soft copy is electronic output viewed on a screen or stored digitally. 'Paper copy' and 'print copy' are informal terms, but the standard computer term is hard copy.
Restarting of computer that is already on is referred to as -
A)
Cold booting
B)
Logging off
C)
Shut down
D)
warm booting
Restarting a computer that is already switched on is called warm booting. A cold boot means starting the computer from a completely powered-off state. Logging off only signs out the current user, and shut down turns the computer off completely.
IC chips used in computers are usually made of
A)
Lead
B)
Silicon
C)
Chromium
D)
Gold
Integrated Circuit (IC) chips used in computers are usually made of silicon because silicon is a semiconductor material ideal for manufacturing transistors and other electronic components on a chip. Lead, chromium, and gold are metals and are not commonly used as the base material for IC chips. Therefore, option (b) is correct.
Vint Cerf is popularly known as one of the fathers of the -
A)
Computer
B)
Internet
C)
Software
D)
Virus
Vint Cerf is widely known as one of the 'fathers of the Internet' because of his pioneering work in developing the TCP/IP protocols along with Bob Kahn, which form the foundation of Internet communication. Therefore, option (b) is correct. The other options are incorrect because he is not primarily known as the father of the computer, software, or virus.
In a computer, the parity bit is added for the purpose of
A)
Coding
B)
Error detection
C)
Controlling
D)
Indexing
A parity bit is an extra bit added to a binary data unit to make the total number of 1s either even or odd. Its main purpose is to help detect errors during data transmission or storage. If the received data does not match the expected parity, an error is detected.
Why others are incorrect:
(a) Coding — parity bit is not mainly used for coding data.
(c) Controlling — it does not control operations.
(d) Indexing — it has no role in indexing.
Coded entries which are used to gain access to a computer system are called -
A)
Security Commands
B)
Entry codes
C)
Codewords
D)
Mnemonics
Coded entries used to gain access to a computer system are commonly called entry codes, such as passwords or PIN-like access codes.
Why others are incorrect:
- Security Commands: these are instructions related to security, not the access code itself.
- Codewords: a general term, but not the standard term for system access entries here.
- Mnemonics: memory aids or shorthand codes used to remember commands, not for login access.
Hence, the correct answer is Entry codes.