OSSSC LSI, Forester, FG Exam 2024: Practice Test-3

The Odisha Subordinate Staff Selection Commission (OSSSC) plays a crucial role in selecting competent candidates for various government positions in Odisha, India. Among its recent offerings are the recruitment tests for the posts of Livestock Inspector (LSI), Forester, and Forest Guard (FG) in 2024. Aspirants eyeing these coveted positions need to equip themselves with comprehensive knowledge and rigorous practice. To aid in this endeavor, OSSSC has released Practice Test-3, serving as a litmus test for candidates’ preparedness.

OSSSC LSI, Forester, FG 2024: Practice Test-I

OSSSC LSI, Forester, FG 2024: Practice Test-II

OSSSC LSI, Forester, FG 2024: Practice Test-3

Arithmetic

1. What is the decimal equivalent of the binary number 1010?
   A) 5
   B) 10
   C) 15
   D) 20
   ANS:- B) 10
   Sol:- To convert the binary number 1010 to its decimal equivalent, we use the positional notation method:
   Starting from the rightmost digit, each digit’s value is determined by its position and its binary value.
   1010 in binary represents:
   1 x 23 + 0 x 22 + 1 x 21 + 0 x 20
   Calculating each term:
   = {1 x (2 x 2 x 2)} + {0 x (2 x 2)} + {1 x (2 x 1)} + 0 x 20
   = (1 x 8) + (0 x 4) + (1 x 2) + (0 x 1)
   = 8 + 0 + 2 + 0
   = 10
   So, the decimal equivalent of the binary number 1010 is B) 10Which of the following is not a rational number?
   A) 0.25
   B) √2
   C) 3/4
   D) -5
   ANS:- B) √2
   Sol:- A rational number is any number that can be expressed as the quotient or fraction p/q of two integers, where q is not equal to zero.
   Let’s analyze each option:
   A) 0.25: Rational number, as it can be expressed as 1/4.
   B) √2: Irrational number, as it cannot be expressed as the quotient of two integers.
   C) 3/4: Rational number, as it is a fraction of two integers.
   D) -5: Rational number, as it can be expressed as -5/1.
   Therefore, the option that is not a rational number is B) √2

    

2. Calculate the inverse of the function f(x) = 3x – 1.
   A) f^(-1)(x) = (x+1) / 3
   B) f^(-1)(x) = (x-1) / 3
   C) f^(-1)(x) = (x-1) / 3
   D) f^(-1)(x) = (x+1) / 3
   S5. ANS:- A) f^(-1)(x) = (x+1) / 3
   Sol:- To find the inverse of a function, we need to swap the roles of x and y and solve for y.
   Given the function
   f(x) = 3x − 1, let’s denote the inverse as f^(-1)(x)
   So, we have:
   y = 3x − 1
   Swap x and y:
   x = 3y − 1
   Now, solve for y:
   x +1 = 3y
   y = (x+1) / 3
   ​So, the inverse function is f^(-1)(x) = (x+1) / 3
   The correct answer is A) f^(-1)(x) = (x+1) / 3
3. Which of the following is an example of a linear equation in three variables?
   A) x+2y=3z
   B) x²+y² =9
   C) 2x+3y−z=7
   D) x+y+z=1
   S5. ANS:- A) x+2y=3z
   Sol:- Option A) x+2y=3z is indeed an example of a linear equation in three variables. It includes all three variables (x, y, z) raised to the first power, satisfying the definition of a linear equation in three variables.
4. Which of the following equations is a linear equation in one variable?
   A) 2x²+ 3 = 0
   B) 3y + 2 = 0
   C) x³− 2x + 5 = 0
   D) 4y²− 9 = 0
   ANS:- B) 3y+2=0
   Sol:- A linear equation in one variable involves only one variable raised to the power of 1. Let’s examine each option:
   option A) 2x²+ 3 = 0 – This equation involves x raised to the power of 2, so it is not linear in one variable.
   Option B) 3y + 2 = 0 – This equation involves only y raised to the power of 1, making it a linear equation in one variable.
   Option C) x³− 2x + 5 = 0 – This equation involves x raised to the power of 3, so it is not linear in one variable.
   Option D) 4y²−9=0 – This equation involves y raised to the power of 2, so it is not linear in one variable.
   Therefore, the correct answer is B) 3y+2=0
5. Calculate the antilogarithm of -1.324.
   A) 0.0505
   B) 0.0987
   C) 0.0754
   D) 0.0302
   ANS:- A) 0.0505.
   Sol:- To calculate the antilogarithm of -1.324, we use the formula:
   antilog(−1.324)=10^-1.324
   Calculating this:
   antilog(−1.324) ≈ 10^-1.324 ≈ 0.04739
   So, the closest option is A) 0.0505.

English

1. Hater of learning and knowledge
   (a) Misologist
   (b) Bibliophile
   (c) Misogynist
   (d) Misanthropist
   Ans:- (a) Misologist
2. A person interested in reading books and nothing else
   (a) Bookkeeper
   (b) Scholar
   (c) Bookworm
   (d) Student
   Ans:- (c) Bookworm
3. Synonyms: Scuttle
   (a) rumor
   (b) priority
   (c) run hurriedly
   (d) solemn
   Ans:- (c) run hurriedly 
4. Synonyms: Utopia
   (a) holiday home
   (b) music
   (c) vacant loot
   (d) perfect state
   Ans:- (d) perfect state
5. Antonyms: Foment
   (A) Repulse
   (B) Cease
   (C) Control
   (D) Quell
   Ans:- (D) Quell

Odia

1. କେଉଁଟି ଶୁଦ୍ଧ ରୂପ ଚିହ୍ନଟ କର ?
   (a) ବିଶ୍ବାସ୍
   (b) ବିଶ୍ବସ୍ଯ
   (c) ବିଶ୍ବାସ୍ଯ
   (d) ବିଶ୍ବସ୍ଯ
   Ans. (c) ବିଶ୍ବାସ୍ଯ 
2. କେଉଁଟି ଏକ ତତ୍ସମ ଶବ୍ଦ ?
   (a) ସନ୍ୟାସୀ
   (b) ଅଝଟ
   (c) ଖଡ଼ୁ
   (d) ଅଗାଡ଼ି
   Ans. (a) ସନ୍ୟାସୀ 
3. କେଉଁଟି ଏକ ଦେଶଜ ଶବ୍ଦ ?
   (a)କାମ
   (b) ଅଝଟ
   (c) ଚାନ୍ଦ
   (d) ଅବିର
   Ans. (b) ଅଝଟ 
4. ‘ପୟୋଦ’ ଶବ୍ଦର ଅର୍ଥ କ’ଣ?
   (a) ଅଗ୍ନି
   (b) ପବନ
   (c) ଜଳ
   (d) ମେଘ
   Ans. (d) ମେଘ 
5. ଶବ୍ଦ କାହା ଯୋଗୁଁ ଅର୍ଥ ପ୍ରକାଶ କରିବାରେ ସମର୍ଥ ହୁଏ ?
   (a) କେବଳ ଧାତୁ ଯୋଗୁଁ
   (b) କେବଳ ପ୍ରତ୍ୟୟ ଯୋଗୁଁ
   (c) ଧାତୁ ଓ ପ୍ରତ୍ୟୟ ଉଭୟ ଯୋଗୁ
   (d) ନିଜ ଗୁଣ ଯୋଗୁଁ
   Ans. (c) ଧାତୁ ଓ ପ୍ରତ୍ୟୟ ଉଭୟ ଯୋଗୁ

General Science

1. Which of the following is an example of a combustion reaction?
   (a) 2H2 + O2 → 2H2O
   (b) C6H12O6 → 2C2H5OH + 2CO2
   (c) 2Na + Cl2 → 2NaCl
   (d) CH4 + 2O2 → CO2 + 2H2O
   Answer: (d) CH4 + 2O2 → CO2 + 2H2O
   Explanation: Combustion reactions involve the rapid reaction of a substance with oxygen, often producing heat and light.
2. Which of the following is an example of a double displacement reaction?
   (a) 2H2 + O2 → 2H2O
   (b) 2H2O → 2H2 + O2
   (c) Fe + 2HCl → FeCl2 + H2
   (d) 2NaCl + Pb(NO3)2 → 2NaNO3 + PbCl2
   Answer: (d) 2NaCl + Pb(NO3)2 → 2NaNO3 + PbCl2
   Explanation: In a double displacement reaction, positive ions of two ionic compounds exchange places to form two new compounds.
3. What is the relationship between voltage, current, and resistance in an electric circuit?
   (a) V=IR
   (b) V=I/R
   (c) V=R/I
   (d) I=V/R
   Answer: (a) V=IR
   Explanation: Ohm’s Law states this relationship.
4. Which type of electric circuit configuration provides multiple pathways for current to flow?
   (a) Series Circuit
   (b) Parallel Circuit
   (c) Combination Circuit
   (d) Open Circuit
   Answer: (b) Parallel Circuit
   Explanation: In a parallel circuit, current has multiple pathways to flow.
5. Which hormone promotes cell elongation and is involved in phototropism and gravitropism?
   A) Auxins
   B) Cytokinins
   C) Gibberellins
   D) Abscisic acid (ABA)
   Answer: A) Auxins
   Explanation: Auxins promote cell elongation and are involved in phototropism (growth towards light) and gravitropism (response to gravity).

GK

1. What percentage of the workforce in India is engaged in agriculture?
   A) Around 14.2%
   B) Around 16.7%
   C) Around 48.4%
   D) Around 58%
   ANS:- D) Around 58%
   Sol:- Around 58% of the workforce in India is engaged in agriculture. So the correct answer is D) Around 58% 
2. How much of the Earth’s water volume is held by underground water reservoirs?
   A) 8 million cubic kilometers
   B) 1.4 billion cubic kilometers
   C) 0.2%
   D) 93%
   A) 8 million cubic kilometers
   Sol:- Groundwater reservoirs hold approximately 8 million cubic kilometers of the Earth’s water volume. Therefore, option A) 8 million cubic kilometers is the correct answer. 
3. In what year did Russia join with Britain to form the Triple Entente?
   a) 1878
   b) 1881
   c) 1904
   d) 1907
   Answer: d) 1907
   Explanation: Russia joined with Britain to form the Triple Entente in 1907. 
4. What percentage of GDP did participating countries like Germany and Great Britain allocate towards wartime expenditures during World War I?
   A) 40%
   B) 50%
   C) 60%
   D) 70%
   Answer: C) 60%
   Explanation: Participating countries such as Germany and Great Britain allocated approximately 60% of their GDP towards wartime expenditures during World War I. 
5. Which body in the Indian Parliament holds the primary responsibility for making laws?
   a) Lok Sabha
   b) Rajya Sabha
   c) President
   d) Judiciary
   Ans: a) Lok Sabha
   Sol: The Lok Sabha, also known as the House of the People, is the lower house of the Indian Parliament and holds the primary responsibility for making laws.

Basic Computer Knowledge

1. *@Ac# is a type of ________________ data.
   a) Symbolic
   b) Alphanumeric
   c) Alphabetic
   d) Numeric
   Answer: b) Alphanumeric 
2. The symbol + in Boolean is also known as the ____________ operator.
   a) AND
   b) OR
   c) ADD
   d) SUMMATION
   Answer: b) OR 
3. In the expression Y + X’.Y, which operator will be evaluated first?
   a) ‘
   b) +
   c) .
   d) ,
   Answer: a) ‘ 
4. Which of the following is not a valid representation in bits?
   a) 8-bit
   b) 24-bit
   c) 32-bit
   d) 64-bit
   Answer: b 
5. CLV stands for, in terms of rotation of the optical disk ___
   a) Concurrent lines value
   b) Constant Linear velocity
   c) constant linear value
   d) concurrent linear velocity
   Answer: b