DELHI PUBLIC SCHOOL, GURGAON

PREBOARD II EXAMINATION (2023-24)

SUBJECT: ARTIFICIAL INTELLIGENCE (417)
CLASS: X, 17/01/2024
SET – A
Time: 2 hrs MM: 50
No. of pages: 6

General instructions:
 Please read the instructions carefully.
 This Question Paper consists of 21 questions.
 SECTION A - OBJECTIVE TYPE QUESTIONS (24 MARKS):
o This section has 05 questions with sub parts.
o Marks allotted are mentioned against each question/part.
 SECTION B – SUBJECTIVE TYPE QUESTIONS (26 MARKS):
o This section has 16 questions.
o Attempt any 3 questions from Q6-Q10, any 4 questions from Q11-Q16 and
any 3 questions from Q17-Q21.
o Marks allotted are mentioned against each question/part.

SECTION A: OBJECTIVE TYPE QUESTIONS

Q1 Answer any 4 questions out of the given 6 questions on Employability Skills. 1x4=4
(i) Assertion (A): Non-verbal communication is the non-linguistic transmission of
information through visual, tactile, and kinaesthetic channels.
Reason(R): Non-verbal communication enables us to share our thoughts with other
persons by using any other method than using words.
(a) Both A and R are correct, and R is the correct reason for A.
(b) Both A and R are correct, and R is not the correct reason for A.
(c) A is correct, but R is incorrect.
(d) A is incorrect, but R is correct.

(ii) Statement 1: The process of doing tasks on your own without any external motivation
is termed as self-motivation.
Statement 2: The process of understanding a problem and finding a solution using a
step-by-step method is called problem-solving skill.
(a) Both Statement 1 and Statement 2 are correct
(b) Both Statement 1 and Statement 2 are incorrect
(c) Statement 1 is correct but Statement 2 is incorrect
(d) Statement 1 is incorrect but Statement 2 is correct

(iii) Ashu regularly uses his computer for his school assignments as well as for the files
related to his interests. He has lot of files stored in his computer. But one day the
computer could not boot properly and upon booting it kept on rebooting. His seniors
told him that it was a virus attack.
After a lot of efforts and help from his seniors, he was able to reboot the computer
but all his work was lost. What could Ashu have done to prevent this ?
i. Taking backups regularly
ii. Getting antivirus installed
iii. Doing less work on the computer
iv. Regular computer scanning

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 (a) Only i and ii (b) Only ii and iii
(c) i, ii, iii (d) i, ii, iv

(iv) Ravi owns a shop which sells sports equipment. He plays cricket everyday with his
colleagues. While playing he is collecting information about what they have done
today and at the same time he is telling them what to do next day. Which quality of
an entrepreneur is Ravi showing?
(a) Taking Risk (b) Managing Business
(c) Taking decisions (d) Divides incom

(v) Motivation to perform an activity which makes us feel good and happy is called
______________ motivation.
(vi) Which of the following is not true about the SDGs?
(a) They encourage the promotion of health, well-being, and education for all, at all
ages.
(b) They include the development of sustainable cities, infrastructure, and industry.
(c) They are an optional choice for nations to follow.
(d) They explicitly promote innovation.
Q2 Answer any 5 questions out of the given 6 questions. 1x5=5
(i) Which of the following is true about neural networks?
(a) Neural Networks tend to perform better with larger amounts of data.
(b) Neural Networks tend to perform poorer with larger amounts of data.
(c) Neural Networks tend to perform better with smaller amounts of data.
(d) Neural Networks need no data.
(ii) Raavya can notice small distinctions in plant life, enjoys being outdoors, can tell you
which clouds are cirrus, and which are stratus. Which type of intelligence does she
possess?
(a) Interpersonal intelligence (b) Existential intelligence
(c) Spatial visual intelligence (d) Naturalistic intelligence
(iii) What does the numbers 1 and 0 represent in the given table ?
aman and anil are stressed
Doc 1 1 1 1 1 1
Doc 2 1 0 0 0 0

(a) TFIDF (b) Term Frequency

(c) Document Vector (d) Document Frequency

(iv) Which one of the following statements is incorrect with reference to accessing data
from any of the data sources?
(a) Data which is available for public usage only should be taken up.
(b) Personal datasets should only be used with the consent of the owner.
(c) Reliable sources of data ensure the authenticity of data.
(d) Data taken from reliable sources can be directly used for training of the model.

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 (v) XYZ manufacturing company keeps innovating its product and packaging keeping
in mind the ease of use and quality. Recently, the company came up with a unique
design of packaging boxes which proves highly useful. However, it wants that no
packaging box should have any design fault. To ensure this, the XYZ company
employed an AI based software. It was shown a huge collection of images showing
the correct design of packaging box. After repeated use of this huge collection of
images, the AI software can now remove boxes with incorrect design.
Such a huge collection of data used for teaching AI software to work in a certain
way is called ___________.
(a) AI data (b) Testing data
(c) Training data (d) All of these

(vi) A company installed an app for handling customer’s calls in its customer care
office. The app responds the customers, talks broadly about the issue and then
transfers call to the concerned department. This is an example of ___________
domain of AI.

Q3 Answer any 5 questions out of the given 6 questions. 1x5=5

(i) Grammatical structure of a sentence is known as ___________.
(e) Semantics (f) Syntax
(g) Synonym (h) Meaning
(ii) ___________ are usually round or square in shape and are typically arranged in a
2-dimensional grid to form a digital image.

(iii) WHOOP makes wearable devices that track athletes’ physical data like resting
heart rate, sleep cycle and respiratory rate. The goal is to help athletes understand
when to push their training and when to rest and to make sure they’re taking the
necessary steps to get the most out of their body. Predicting such instructions for
the AI model is an example of ____________.
(a) Computer Vision
(b) Data Science
(c) Natural Language Processing
(d) Virtual Reality

(iv) Which of the following statement is TRUE about learning-based approach?

(a) In learning based-approach, the ability to learn using an AI model causes
adaptive intelligence.
(b) In learning based-approach, the AI model gets trained on the data fed into it.
(c) In learning based-approach, the machine learns by itself by referring to an AI
model.
(d) All of these
(v) Which of the following statements are a part of AI Ethics?
i. If an AI causes harm, it should be possible to determine why.
ii. Teams developing Al systems have no role to play on safety standards.
iii. Al systems should be safe and secure throughout their operational lifetime.
iv. The designers and makers of advanced AI systems are considered as the
stakeholders in the moral implications of the use, misuse, and actions of these
systems/devices, with a responsibility and opportunity to shape those
implications.
(a) i, ii, iii
(b) ii, iii, iv
(c) i, iii, iv
(d) i, ii, iv
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(vi) Which evaluation parameter can be defined as the fraction of positive cases that are
correctly identified?
Q4 Answer any 5 questions out of the given 6 questions. 1x5=5
(i) Statement 1: At the very core, CV means enabling computers to derive meaning
from spoken or written text in natural language input.
Statement 2: Al is a field of study covering human behaviour, biology, psychology,
language, and linguistics.
(a) Both Statement 1 and Statement 2 are correct
(b) Both Statement 1 and Statement 2 are incorrect
(c) Statement 1 is correct but Statement 2 is incorrect
(d) Statement 1 is incorrect but Statement 2 is correct

(ii) It is difficult for a machine to understand human language due to ________

i. Language syntax
ii. Multiple characteristics of a word
iii. Correct grammar but no sense
iv. Same syntax but different meanings
(a) i, ii, iii (b) ii, iii, iv
(c) i, ii, iv (d) all of the given reasons
(iii) 1280x1024 represents __________
(a) Image value (b) Pixel value
(c) RGB value (d) No. of pixels
(iv) A weather predicting Al model predicted that Tamil Nadu would face a storm but
no such incident took place. Under which category of the confusion matrix will this
be marked?
(a) False Positive (b) False Negative
(c) True Positive (d) True Negative
(v) Which of the following is FALSE about supervised learning?
(a) The dataset which is fed to the machine is labelled.
(b) Supervised learning is a part of data exploration phase of AI project cycle.
(c) In supervised learning, a label is some kind of information through which the
data can be recognized.
(d) The two techniques under supervised learning are classification and regression.

(vi) Which one of the following statements is correct?

(a) Prediction is the input given to the machine to receive the expected result of
the reality.
(b) Prediction is the output given which always match the reality.
(c) Prediction and reality both can be used interchangeably.
(d) The prediction is the output which is given by the machine and the reality is
the real scenario in which prediction has been made.
Q5 Answer any 5 questions out of the given 6 questions. 1x5=5

(i) When you look for a sports related term on Google, it simply looks in its database
of sports webpage and articles, which it has collected from the Internet. How is
Google able to segregate articles in terms of 'Sports article', 'Art blog', 'Technical
review' and so on ? Which of these NLP techniques is used by Google for this?
(a) Sentiment Analysis (b) Text classification
(c) Automatic text summarization (d) None of these

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(ii) _______________describes how bright that pixel is, and/or what colour it should
be.
(iii) Statement 1: Stemming and Lemmatisation both remove affixes from the words.
Statement 2: They both are a part of Bag of Words algorithm.
(a) Both Statement 1 and Statement 2 are correct
(b) Both Statement 1 and Statement 2 are incorrect
(c) Statement 1 is correct but Statement 2 is incorrect
(d) Statement 1 is incorrect but Statement 2 is correct

(iv) When prediction and reality do not match and prediction is false, it is called
__________.
(e) False positive (f) True positive
(g) True negative (h) False negative

(v) Which one of the following statements is incorrect?

(a) AI technology provides digital assistance.
(b) There is no risk of misuse of AI.
(c) Use of AI reduces human errors.
(d) There is lack of practical AI based products.

(vi) Three AI models are created to solve the same problem. How will we select the
best model?
(a) The model with high accuracy will be selected.
(b) The model with high F1 score will be selected.
(c) The model with high precision will be selected.
(d) The model with high recall will be selected.

SECTION B: SUBJECTIVE TYPE QUESTIONS

Answer any 3 out of the given 5 questions on Employability Skills. 2x3=6

Q6 Roma is preparing a lecture for her team on self-motivation. Which four ways
should she include in her lecture to help her team become self-motivated?

Q7 Write any two ways to overcome barriers to effective communication.

Q8 Write any two ways to protect your data from various threats.

Q9 Explain the three-step process when one takes up entrepreneurship as a career

option.

Q10 Every academic session, we see lot of stationery items like pens, pencils, colour
pencils, crayons, notebooks etc. left by students. Suggest any two ways by which
you wish to dispose them by using green skills.

Answer any 4 questions out of the given 6 questions. 2x4=8

Q11 “Once trained, the model cannot learn from its mistakes”. Identify and explain the
AI model which refers to the given statement.

Q12 Explain a scenario in which the False Positive condition costs us more than False
Negatives.

Q13 Write any two characteristics of a smart bot.

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Q14 Why training with information/data is important in Artificial Intelligent devices?
Q15 For Data Science, usually the data is collected in the form of tables. These tabular
datasets can be stored in different formats. Name and explain any one commonly
used format used for data storage.
Q16 How is computer vision used in retail industry? Write any two ways.
Answer any 3 questions out of the given 5 questions. 4x3=12
Q17 Create a 4W canvas for the case study given below :
A university runs political science course in online mode. The course is pursued by
several thousand students across the world. The course is in English language.
University analysed that many students who do not know English language are not
driven to join the course. If the course is in multiple languages, then more students
can join in thereby adding to higher revenues for the university. University needs
an intelligent system to translate the course content into different languages
depending on the language selected by the students. This way, the hassle of
managing multiple copies of the same course in different languages will not be
there.
Q18 Differentiate between classification and clustering algorithms with the help of
suitable examples.

Q19 Read the text given below and answer the given questions:
A team from the University of California at Berkeley discovered a problem in their
Al system, that was used to assign care to 200 million patients in the United States.
In general, blacks were assigned lower risk scores than whites, even though black
patients were also statistically more likely to have comorbidities and therefore
experience higher levels of risk. This, in turn, meant that black patients were less
likely to receive necessary standards of care and more likely to be adversely
affected by denial of adequate care. The problem arose from the fact that the
system used predicted health care costs as a determining variable to assign risk
values, and because black patients are generally less able to pay or 'considered' less
able to pay, the system 'decided"' that they were not entitled to a higher standard of
medical care.
(a) What ethical issue is the author talking about?
(b) What were the reasons of this ethical issue entering the Al system? Give two
reasons.
(c) Name two other factors besides health care cost which should be used to
determine risk values.
Q20 Answer the following questions with reference to NLP.
(a) Explain ‘Bag of words’ algorithm.
(b) What are the two outcomes of ‘Bag of words’ algorithm?
(c) Name the steps involved in ‘Bag of words’ algorithm.
Q21 Rainfed agriculture occupies about 51 percent of country’s net sown area and
accounts for nearly 40 percent of the total food production. Thus, an AI model has
been created which predicts if there will be rain or not. The confusion matrix for
the same is:
Reality
Confusion Matrix
True False
True 50 40
Prediction
False 12 10
(a) Identify the total number of correct predictions made by the model.
(b) Calculate precision, recall and F1 Score.
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