Q. If a test for a disease has a sensitivity of 90% and a specificity of 95%, what is the probability of a true positive result if the prevalence of the disease is 1%? (2022)
Q. If a test for a disease has a sensitivity of 90% and a specificity of 95%, what is the probability that a person who tests positive actually has the disease, given that the prevalence is 1%? (2022)
Q. If a trait is controlled by a single gene with two alleles, where A is dominant over a, what is the expected phenotypic ratio in the offspring of a cross between Aa and aa?
A.
1:1
B.
3:1
C.
2:1
D.
1:2
Solution
The cross Aa x aa will produce offspring in a 1:1 phenotypic ratio (A:a).
Q. If a trait is sex-linked and recessive, what is the probability that a son will express the trait if his mother is a carrier and his father does not have the trait?
A.
0%
B.
25%
C.
50%
D.
100%
Solution
The son will inherit the X chromosome from his mother. If she is a carrier (X^HX^h), there is a 50% chance he will inherit the X^h and express the trait.
Q. If a treatment is effective in 80% of cases, what is the probability that it will be effective for at least one out of three patients? (2023)
A.
0.512
B.
0.8
C.
0.2
D.
0.64
Solution
Probability that treatment is not effective for one patient = 1 - 0.8 = 0.2. For three patients, the probability that it is not effective for all = 0.2^3 = 0.008. Therefore, the probability that it is effective for at least one = 1 - 0.008 = 0.992.
Q. If a triangle has two sides of lengths 6 and 8, what is the maximum possible length of the third side?
A.
12
B.
10
C.
14
D.
15
Solution
The maximum length of the third side is less than the sum of the other two sides, so it can be at most 6 + 8 - 1 = 13, but must also be greater than the difference, so it can be at most 10.
General Knowledge (NDA) is a crucial component of various competitive exams, including the NDA entrance test. Mastering this subject not only enhances your awareness of current affairs but also significantly boosts your exam scores. Practicing MCQs and objective questions helps you identify important topics and improves your ability to tackle exam questions effectively. By engaging with practice questions, you can solidify your understanding and prepare thoroughly for your upcoming exams.
What You Will Practise Here
Current Affairs: National and International Events
History: Key Dates and Important Figures
Geography: Physical and Political Maps
Indian Polity: Constitution and Governance
Economics: Basic Concepts and Terminology
Science: Fundamental Principles and Discoveries
General Awareness: Sports, Awards, and Recognitions
Exam Relevance
General Knowledge is a significant section in various exams such as CBSE, State Boards, NEET, and JEE. In these assessments, you can expect questions that test your understanding of historical events, geographical facts, and current affairs. Common question patterns include multiple-choice questions that require you to select the correct answer from a set of options, making it essential to be well-prepared with important General Knowledge (NDA) questions for exams.
Common Mistakes Students Make
Overlooking current affairs, assuming they are less important.
Confusing similar historical events or dates.
Neglecting to revise basic geographical concepts.
Misunderstanding key terms in Indian polity and governance.
Failing to connect economic principles with real-world scenarios.
FAQs
Question: What are the best ways to prepare for General Knowledge (NDA)? Answer: Regularly read newspapers, follow current affairs, and practice MCQs to enhance your knowledge.
Question: How can I improve my speed in answering General Knowledge questions? Answer: Time yourself while practicing and focus on understanding concepts rather than rote memorization.
Start your journey towards mastering General Knowledge (NDA) today! Solve practice MCQs and test your understanding to ensure you are well-prepared for your exams. Every question you tackle brings you one step closer to success!
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