Defence Exams MCQ & Objective Questions
Defence Exams play a crucial role in shaping the future of aspiring candidates in India. These exams not only assess knowledge but also test the ability to apply concepts in real-world scenarios. Practicing MCQs and objective questions is essential for effective exam preparation, as it helps students identify important questions and enhances their understanding of key topics.
What You Will Practise Here
Fundamentals of Defence Studies
Key Historical Events and Their Impact
Important Defence Policies and Strategies
Current Affairs Related to National Security
Basic Concepts of Military Operations
Understanding Defence Technologies
Analysing Defence Budget and Expenditure
Exam Relevance
The topics covered in Defence Exams are highly relevant across various educational boards, including CBSE and State Boards, as well as competitive exams like NEET and JEE. Students can expect questions that focus on historical events, current affairs, and fundamental concepts related to defence. Common question patterns include multiple-choice questions that assess both theoretical knowledge and practical application.
Common Mistakes Students Make
Overlooking current affairs, which are often integrated into exam questions.
Confusing similar historical events or dates, leading to incorrect answers.
Neglecting the importance of definitions and key terms in objective questions.
Relying solely on rote memorization instead of understanding concepts.
FAQs
Question: What types of questions can I expect in Defence Exams?Answer: You can expect a mix of MCQs covering historical events, current affairs, and fundamental concepts related to defence.
Question: How can I improve my performance in Defence Exams?Answer: Regular practice of MCQs and understanding key concepts will significantly enhance your performance.
Start your journey towards success by solving practice MCQs today! Testing your understanding will not only boost your confidence but also prepare you for the important Defence Exams ahead.
Q. If the mean of a data set is 50 and the variance is 25, what is the standard deviation? (2019)
Show solution
Solution
Standard deviation is the square root of variance. Therefore, SD = √25 = 5.
Correct Answer:
B
— 10
Learn More →
Q. If the mean of a dataset is 50 and there are 10 numbers, what is the total sum of the numbers? (2021)
A.
500
B.
600
C.
550
D.
450
Show solution
Solution
Total sum = Mean * Number of elements = 50 * 10 = 500.
Correct Answer:
A
— 500
Learn More →
Q. If the mean of a set of 10 numbers is 50, what is the mean if one number is increased by 10? (2021)
Show solution
Solution
The total sum is 500. Increasing one number by 10 gives a new total of 510. New mean = 510 / 10 = 51.
Correct Answer:
B
— 51
Learn More →
Q. If the mean of a set of numbers is 12 and there are 6 numbers in the set, what is the total sum of the numbers?
Show solution
Solution
Total sum = Mean * Number of items = 12 * 6 = 72.
Correct Answer:
A
— 60
Learn More →
Q. If the mean of a set of numbers is 12 and there are 6 numbers, what is the total sum of the numbers?
Show solution
Solution
Total sum = Mean * Number of items = 12 * 6 = 72.
Correct Answer:
A
— 60
Learn More →
Q. If the mean of a set of numbers is 12 and there are 8 numbers in the set, what is the total sum of the numbers?
Show solution
Solution
Total sum = Mean * Number of items = 12 * 8 = 96.
Correct Answer:
A
— 96
Learn More →
Q. If the mean of a set of numbers is 25 and there are 12 numbers in the set, what is the total sum of the numbers?
A.
300
B.
250
C.
275
D.
325
Show solution
Solution
Total sum = Mean * Number of items = 25 * 12 = 300.
Correct Answer:
A
— 300
Learn More →
Q. If the mean of a set of numbers is 25 and there are 8 numbers, what is the total of these numbers? (2022)
A.
150
B.
200
C.
250
D.
300
Show solution
Solution
Total = Mean * Number of Items = 25 * 8 = 200.
Correct Answer:
C
— 250
Learn More →
Q. If the mean of a set of numbers is 30 and the total number of elements is 6, what is the total sum of the elements? (2023)
A.
180
B.
150
C.
120
D.
200
Show solution
Solution
Total sum = Mean * Number of elements = 30 * 6 = 180.
Correct Answer:
A
— 180
Learn More →
Q. If the mean of a set of numbers is 50 and there are 5 numbers, what is the total sum of the numbers? (2020)
A.
200
B.
250
C.
300
D.
350
Show solution
Solution
Total sum = Mean * Number of items = 50 * 5 = 250.
Correct Answer:
A
— 200
Learn More →
Q. If the mean of five numbers is 20, what is their total sum? (2020)
A.
80
B.
100
C.
120
D.
140
Show solution
Solution
Mean = Total Sum / Number of Items. Therefore, Total Sum = Mean * Number of Items = 20 * 5 = 100.
Correct Answer:
A
— 80
Learn More →
Q. If the mean of the first five prime numbers is 6, what is the sum of these numbers? (2020)
Show solution
Solution
Mean = Sum / 5. Therefore, Sum = Mean * 5 = 6 * 5 = 30.
Correct Answer:
A
— 30
Learn More →
Q. If the mean of the first n natural numbers is 10, what is the value of n?
Show solution
Solution
Mean = n(n + 1) / (2n) = 10.\n\n(n + 1) / 2 = 10\n\n(n + 1) = 20\n\nn = 19.
Correct Answer:
A
— 20
Learn More →
Q. If the mean of the first n natural numbers is 15, what is the value of n? (2019)
Show solution
Solution
Mean = n(n + 1) / (2n) = (n + 1) / 2 = 15. Therefore, n + 1 = 30, so n = 29.
Correct Answer:
B
— 30
Learn More →
Q. If the mean of the following data set is 20: 15, 18, 22, x, 25, what is the value of x? (2019)
Show solution
Solution
Mean = (15 + 18 + 22 + x + 25) / 5 = 20. Solving gives x = 24.
Correct Answer:
C
— 24
Learn More →
Q. If the median of the data set 2, 3, 5, 7, 9 is 5, what is the mode of the data set 2, 3, 3, 5, 7, 9?
Show solution
Solution
Mode is the number that appears most frequently. Here, 3 appears twice, so mode = 3.
Correct Answer:
B
— 3
Learn More →
Q. If the median of the data set 3, 7, 5, 9, 11 is x, what is the value of x? (2022)
Show solution
Solution
Arranging the data: 3, 5, 7, 9, 11. Median = 7.
Correct Answer:
B
— 7
Learn More →
Q. If the median of the data set 3, 7, 8, 12, x is 8, what is the value of x? (2022)
Show solution
Solution
For the median to be 8, x must be less than or equal to 8. The only value that satisfies this is 6.
Correct Answer:
A
— 6
Learn More →
Q. If the median of the data set 3, 7, 9, 15, 20 is x, what is the value of x? (2022)
Show solution
Solution
Median is the middle value. Here, median = 9.
Correct Answer:
B
— 9
Learn More →
Q. If the median of the data set 3, 7, 9, x, 15 is 9, what is the value of x? (2022)
Show solution
Solution
For the median to be 9, x must be 9. The ordered set is 3, 7, 9, 9, 15.
Correct Answer:
A
— 8
Learn More →
Q. If the mode of the following numbers: 3, 3, 4, 5, 5, 5, 6, 7 is removed, what will be the new mode? (2019)
Show solution
Solution
Removing 5, which is the mode, leaves 3 as the new mode since it appears twice.
Correct Answer:
A
— 3
Learn More →
Q. If the mode of the following set of numbers: 1, 2, 2, 3, 4, 4, 4, 5 is increased by 1, what will be the new mode? (2022)
Show solution
Solution
The original mode is 4. Increasing it by 1 gives a new mode of 5.
Correct Answer:
C
— 4
Learn More →
Q. If the mortality rate of a disease is 5% and 2000 people are diagnosed, how many deaths are expected? (2023)
A.
50
B.
75
C.
100
D.
125
Show solution
Solution
Expected deaths = 5% of 2000 = 0.05 * 2000 = 100 deaths.
Correct Answer:
C
— 100
Learn More →
Q. If the numbers 8, 3, 5, 12, and 7 are given, what is the median? (2022)
Show solution
Solution
Arranging the numbers: 3, 5, 7, 8, 12. The median is the middle number, which is 7.
Correct Answer:
B
— 7
Learn More →
Q. If the numbers are 8, 8, 6, 5, 5, 5, 7, 9, what is the mode?
Show solution
Solution
The mode is 5, as it appears 3 times, more than any other number.
Correct Answer:
A
— 5
Learn More →
Q. If the Parliament has 790 members and 20% are women, how many women are there in the Parliament?
A.
158
B.
160
C.
150
D.
170
Show solution
Solution
Number of women = 20% of 790 = 0.2 * 790 = 158.
Correct Answer:
A
— 158
Learn More →
Q. If the Parliament has 790 members and 30% are women, how many women members are there?
A.
210
B.
220
C.
230
D.
240
Show solution
Solution
Number of women members = 30% of 790 = 0.3 * 790 = 237.
Correct Answer:
A
— 210
Learn More →
Q. If the Parliament has 790 members and 30% of them are from the ruling party, how many members are from the ruling party?
A.
210
B.
220
C.
230
D.
240
Show solution
Solution
Members from ruling party = 30% of 790 = 0.30 * 790 = 237.
Correct Answer:
C
— 230
Learn More →
Q. If the Parliament has 790 members and 40% are from the opposition, how many members are from the opposition?
A.
316
B.
320
C.
300
D.
310
Show solution
Solution
Opposition members = 40% of 790 = 0.4 * 790 = 316.
Correct Answer:
A
— 316
Learn More →
Q. If the Parliament is in session for 100 days in a year and the Lok Sabha meets for 60% of those days, how many days does the Lok Sabha meet?
Show solution
Solution
Days Lok Sabha meets = 60% of 100 = 0.6 * 100 = 60 days.
Correct Answer:
A
— 60
Learn More →
Showing 1651 to 1680 of 3872 (130 Pages)
