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SSC CHSL Exam 2024 Tier-II Official Paper (Held On: 18 Nov, 2024 Shift 1) (English)
SSC CHSL Exam 2024 Tier-II Official Paper (Held On: 18 Nov, 2024 Shift 1) (English) with official questions, answers, and practice mock test.
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Section 1
General Intelligence and Reasoning
25 questions
Section Test
1
The numbers of Commerce, Science and Arts postgraduates working in a company are 40, 80 and 60, respectively. If these figures are represented by a pie chart, then what is the angle corresponding to Commerce postgraduates?
MCQ
Correct answer: 80
2
A quadrilateral having equal diagonals and equal opposite sides is always a ________.
MCQ
Correct answer: rectangle
3
89 is related to 78 following a certain logic. Following the same logic, 97 is related to 86. To which ofthe following is 72 related, following the same logic? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding /subtracting /multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
MCQ
Correct answer: 61
4
In this question, a statement is followed by two conclusions, numbered I and II. Decide which of the two conclusions is/are true based on the given statement. Statement: M < N ≤ O = S > T ≥ W ≥ Z Conclusions: I. M ≤ T II. N < Z
MCQ
Correct answer: Neither Conclusion I nor Conclusion II is true
5
Select the set in which the numbers are related in the same way as are the numbers of the followingsets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding /subtracting /multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.) (19, 9, 173) (6, 17, 104)
MCQ
Correct answer: (11, 4, 46)
6
If 2 is added to each odd digit and 1 is subtracted from each even digit in the number 23584617, how many digits will appear more than once in the new number thus formed?
MCQ
Correct answer: Three
7
Three of the following four number triads are alike in a certain way and thus form a group. Which is the number triad that does not belong to that group? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
MCQ
Correct answer: 76 - 67 - 54
8
Two statements I and II have been given. These statements may be independent causes or effects of independent causes or a common cause. One of the statements maybe the effect of the other statement. Read both the statements and select the correct option. I. All undergraduate exams scheduled for tomorrow in Balasore have been cancelled by the university. New dates will be announced early next week. II. High winds and very heavy rains are expected in Balasore tomorrow as the cyclone makes a landfall by 3 pm.
MCQ
Correct answer: II is the cause and I is its possible effect
9
Select the figure from the options that can replace the question mark (?) and complete the given series.
MCQ
Correct answer: 19
10
What will come in the place of the question mark (?) in the following equation, if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged? 21 − 7 ÷ 144 × 3 + 18 = ?
MCQ
Correct answer: 339
11
In a certain code language, ‘DARK’ is coded as ‘3284’ and ‘RAKE’ is coded as ‘6438’.What is the code for ‘E’ in that language?
MCQ
Correct answer: 6
12
Select the combination of letters that when sequentially placed in the blanks of the given series, will complete the series. REMRRE_R_EEMRRE_M_
MCQ
Correct answer: MREM
13
How many meaningful English words can be formed from Y, P, R and A, using each letter mandatorily but only once in each word?
MCQ
Correct answer: One
14
Three of the following word pairs are alike in some manner and hence form a group. Which word pair does not belong to that group? (The words must be considered as meaningful English words and must not be grouped based on the number of letters/number of consonants/vowels in the word.)
MCQ
Correct answer: Television - Triangle
15
Which of the following letter-clusters should replace # and % so that the pattern and relationship followed between the letter-cluster pair on the left side of :: is the same as that on the right side of :: ? # : VXB :: ACG : %
MCQ
Correct answer: # - UWA, % - BDH
16
A certain number of people are sitting in a row facing the north direction. ‘T’ is sitting to the immediate right of ‘U’. ‘Y’ is sitting 5th to the left of ‘U’. ‘Z’ is an immediate neighbour of both ‘T’ and ‘P’. ‘V’ is sitting 5th to the left of ‘T’. ‘O’ is sitting at one extreme end, and there is only one person sitting between ‘O’ and ‘Y’. If no other person is sitting in the row, what is the total number of people seated?
MCQ
Correct answer: 11
17
Select the option that is related to Figure C in the same way as Figure B is related to Figure A.
MCQ
Correct answer: [Diagram / Option 1]
18
Select the correct option that indicates the arrangement of the following words in a logical and meaningful order. 1. Hexagon 2. Triangle 3. Pentagon 4. Square 5. Octagon
MCQ
Correct answer: 2, 4, 3, 1, 5
19
How many meaningful four letter English words can be formed using A, E, D and N using all the letters but each letter only once in each word?
MCQ
Correct answer: [Diagram / Option 3]
20
Select the correct mirror image of the given figure when the mirror is placed at MN as shown below.
MCQ
Correct answer: SBWUC t
21
Three of the following four number triads are alike in a certain way and thus form a group. Which is the number triad that does not belong to that group? (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into its constituent digits. E.g. 13 – Operations on 13 such as adding/subtracting/multiplying etc. to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.)
MCQ
Correct answer: 31 - 46 - 41
22
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: Some crayon is colour. No colour is water. Some water is liquid. Conclusions: I) Some crayon is liquid. II) Some crayon is not water. III) Some liquid is not colour.
MCQ
Correct answer: Only II and III
23
The sequence of folding a piece of paper and the manner in which the folded paper has been cut is shown below. Select the option figure that would most closely resemble the unfolded form of the paper.
MCQ
Correct answer: [Diagram / Option 2]
24
MNQP is related to STWV in a certain way based on the English alphabetical order. In the same way, ABED is related to GHKJ. To which of the following is IJML related, following the same logic?
MCQ
Correct answer: OPSR
25
In this question, a statement is followed by two courses of actions, numbered I and II. You must assume everything in the statement to be true and on the basis of the information given in the statement, decide which of the courses of actions logically follow(s) for pursuing. Statement: In spite of the principal’s repeated warnings, a child was caught with a hidden mobile phone in the school. Courses of Action: I) The mobile phone should be taken away from the child and the parents should be called to the school. II) The child should be punished for committing this mistake.
MCQ
Correct answer: Both (I) and (II) follow
Section 2
General Awareness
25 questions
Section Test
26
Select the INCORRECTLY spelt word.
MCQ
Correct answer: Implusive
27
Select the most appropriate option to fill in the blank. The rising rate of inflation is making life very hard for ________ poor.
MCQ
Correct answer: the
28
Select the most appropriate synonym of the given word. Dingy
MCQ
Correct answer: Dreary
29
Select the most appropriate option to fill in the blanks. It’s funny how every time he fails to apply the _________ and _________ the glass.
MCQ
Correct answer: brakes; breaks
30
The following sentence has been split into four segments. Identify the segment that contains a grammatical error. The Supreme Court set away / the verdict of the High Court / and agreed to hear the plea / of the complainant.
MCQ
Correct answer: The Supreme Court set away
31
Select the most appropriate phrasal verb that can substitute the underlined segment in the given sentence. The firefighters tried their best to extinguish the fire.
MCQ
Correct answer: put out
32
Select the option that expresses the given sentence in passive voice. The new sunshades have protected our windows during the rainy season.
MCQ
Correct answer: Our windows have been protected by the new sunshades during the rainy season.
33
Replace the underlined word in the given sentence with its correctly spelt version. I have been morning the death of my pet dog.
MCQ
Correct answer: mourning
34
Select the most appropriate option that can substitute the underlined segment in the given sentence. Research in Social Sciences is plagued nowadays on gloomy definitions and measurements.
MCQ
Correct answer: nowadays by gloomy definitions
35
Select the option that expresses the given sentence in indirect speech. He always says to me, “I am perturbed.”
MCQ
Correct answer: He always tells me that he is perturbed.
36
Select the most appropriate option to fill in blank number 1.
MCQ
Correct answer: but
37
Select the most appropriate option to fill in blank number 2.
MCQ
Correct answer: increases
38
Select the most appropriate option to fill in blank number 3.
MCQ
Correct answer: waking
39
Select the most appropriate option to fill in blank number 4.
MCQ
Correct answer: immobile
40
What intrigued Lena's curiosity in the forest?
MCQ
Correct answer: She stumbled upon an ancient map.
41
Select the most appropriate ANTONYM of the underlined word in the given sentence. What surrounded Lena as she journeyed through the forest?
MCQ
Correct answer: Freed
42
Select the correct spelling of the underlined word in the given sentence. What was Lena's reason for following the trial on the map?
MCQ
Correct answer: Trail
43
Where did Lena find the map?
MCQ
Correct answer: Half-buried in the undergrowth
44
What is the theme of this passage?
MCQ
Correct answer: Endangered species
45
Choose the word which closely means ‘adversely’.
MCQ
Correct answer: Detrimentally
46
What is the author’s tone in this passage?
MCQ
Correct answer: Concerned
47
The Black Buck is killed because of hunters’ ______________.
MCQ
Correct answer: material gain
48
A part of the cell other than the nucleus which has DNA and ribosomes and can thus make its own proteins is known as:
MCQ
Correct answer: mitochondria
49
Who propounded the famous equation E = mc2 in 1905?
MCQ
Correct answer: Albert Einstein
50
Which of the following statements is correct regarding the jurisdiction of the Supreme Court of India?
MCQ
Correct answer: The original jurisdiction extends to any dispute between the Government of India and one or more State.
Section 3
Quantitative Aptitude
25 questions
Section Test
51
The weights (in kg) of 7 cousins in a family are 54, 62, 65, 70, 60, 59, 55. Find the median weight.
MCQ
Correct answer: 60 kg
52
If 88 is replaced by 93 and 41 is replaced by 47 in the following observations, 46, 48, 63, 76, 88, 41, 35, 55, 90, 56, 92, then what would be the difference between the new median and the previous median?
MCQ
Correct answer: 0
53
[Image / Diagram based question]
MCQ
Correct answer: −8
54
A sum on simple interest at the rate of 5% per annum amounts to ₹4,160 in 6 years. Find the sum.
MCQ
Correct answer: 3,200
55
Simplify (2 z - 5 y)2 + (5 z + 2 y)2 - 25 z 2.
MCQ
Correct answer: 29y2 + 4z2
56
The price of an electronic machine decreased by 5%, 10% and 15% during the first three years. What will be the price of the machine after three years if the value at the beginning was ₹ 8,000?
MCQ
Correct answer: ₹ 5,814
57
In a triangle PQR, incentre is A and ∠QAR = $116^\circ$. Find the measure of ∠QPR.
MCQ
Correct answer: $52^\circ$
58
The average of five integers is 48. The average of the first four integers is 50% of the 5th integer. The 5th integer is:
MCQ
Correct answer: 80
59
A milk vendor has 75 litres of cow milk, 45 litres of toned milk and 30 litres of full cream milk. These should be placed in different trays such that each tray contains the same quantity of milk and two kinds of milk should not be mixed in a tray. What is the least number of trays required to place all the milk?
MCQ
Correct answer: 10
60
Rat nes h and Vine et worked on alternate days, starting with Rat nes h The entire work got completed in 54 = days. If Rat nes h alone can finish the work in 48 days, then in how many days can Vine et alone do the work
MCQ
Correct answer: 64
61
ABCD is a trapezium in which AB is parallel to CD, and E and F are the mid-points of non-parallel sides AD and BC. If EF is parallel to AB, AB = 28 cm and CD = 18 cm, then find EF (in cm).
MCQ
Correct answer: 23
62
If an increase of 40% is observed on an amount in 4 years at simple interest, what will be the compound interest on ₹80,000 after 4 years at the same rate of interest?
MCQ
Correct answer: ₹37,128
63
[Image / Diagram based question]
MCQ
Correct answer: 22 cm
64
A number 37 is divided into two parts such that 5 times one part and 11 times the other is together equal to 227. Find the value of 9 times the smaller number.
MCQ
Correct answer: 63
65
For making a toy a hemisphere is attached at one end of a cylinder anda cone is attached at the other end of the cylinder The cylinder the cone and the hemisphere have a common radius of 4.2 cm The height of the cylinder and that of the cone is. (Use T = 7 cm Find the volume (in cm) of the toy.
MCQ
Correct answer: 672.672
66
The average of 11 results is 60 and that of the first 10 is 59. The 11th result is?
MCQ
Correct answer: 70
67
The surface area of a cube is 1728 cm2. Find its volume.
MCQ
Correct answer: [Diagram / Option 4]
68
Tarun gives Hari a head-start of 60 seconds in a 2400 m race and still beats him by 40 seconds. If the speed of Hari is 6 m/s, find the speed of Tarun.
MCQ
Correct answer: 8 m/s
69
The average of 11 results is 59 and that of the first 10 is 58. The 11th result is?
MCQ
Correct answer: 69
70
Three numbers are in the ratio 5 : 7 : 9, and their LCM is 1260. What is the difference between the largest and the smallest number?
MCQ
Correct answer: 16
71
A, B and C jointly started a business in which A invested 7.000 for 12 months, B invested 8,000 for 10 months the working and C invested 12,000 for 6 months. A was g member for which he received 20% of the profits as his remuneration. The total earned at the end of one year was 14,750. What is C's share profit (in) in the profit?
MCQ
Correct answer: 3,600
72
The radii of the two spheres are in the ratio 4 : 5. Their volume will be in the ratio:
MCQ
Correct answer: 64 : 125
73
The marked price of an article is ₹2,800. It is sold at three successive discounts of 15%, 8% and 5%. Find the selling price of the article (in ₹).
MCQ
Correct answer: 2,080.12
74
A die is cast twice and a coin is tossed thrice. Find the probability that the die will turn a 5 each time and the coin will turn a head every time.
MCQ
Correct answer: 288
75
If a man’s age is four times the sum of the ages of his three children, and after 6 years his age will be twice the sum of the ages of his three children, then what is the man’s present age?
MCQ
Correct answer: 60 years
Section 4
English Comprehension
57 questions
Section Test
76
Four figure pairs have been given, out of which three are alike in a certain way and thus form a group. Which is the one that does not belong to that group?
MCQ
Correct answer: [Diagram / Option 2]
77
Two statements, I and II have been given. These statements may be independent causes or effects of independent causes or a common cause. One of the statements may be the effect of the other statement. Read both the statements and select the correct option. I) Refreshing and delicious salads are full of antioxidants, Vitamin A, Vitamin C, folate, calcium, fibre and phytonutrients, which are good for health. II) It is a perfect way to begin our day with salads in order to lead a healthy life.
MCQ
Correct answer: I is the cause and II is its possible effect
78
Read the given statements and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusions logically follow(s) from the statements. Statements: Some rice is white. Some rice is brown. No white is wheat. Conclusions: I) Some wheat is brown. II) Some rice is not wheat. III) Some brown is not white.
MCQ
Correct answer: Only II
79
In a certain code language, ‘PAID’ is coded as ‘3274’ and ‘APED’ is coded as ‘6437’.What is the code for ‘E’ in that language?
MCQ
Correct answer: 6
80
Select the set in which the numbers are related in the same way as are the numbers of the followingsets. (NOTE: Operations should be performed on the whole numbers, without breaking down the numbers into their constituent digits. E.g. 13 – Operations on 13 such as adding /subtracting /multiplying to 13 can be performed. Breaking down 13 into 1 and 3 and then performing mathematical operations on 1 and 3 is not allowed.) (7, 11, 33) (14, 18, 54)
MCQ
Correct answer: (12, 16, 48)
81
How many meaningful English words can be formed from R, O, W, D and C, using each letter mandatorily but only once in each word?
MCQ
Correct answer: One
82
Four figure pairs have been given, out of which three are alike in a certain way and thus form a group. Which is the one that does not belong to that group?
MCQ
Correct answer: [Diagram / Option 3]
83
Select the option that expresses the given sentence in passive voice. Doctors saved many lives during the pandemic.
MCQ
Correct answer: Many lives were saved by doctors during the pandemic.
84
Select the option that expresses the given sentence in direct speech. He will say that he is okay.
MCQ
Correct answer: He will say, “I am okay.”
85
Rearrange the jumbled words and choose the alternative that correctly matches the given sentence. The youth ___________ now-a-days. life / of / today / a / leading / are / miserable
MCQ
Correct answer: of today are leading a miserable life
86
Rearrange the jumbled words and choose the alternative that correctly matches the given sentence. The people of _______ to survive. are / this / island / commodities / deprived / essential / needed / remote / of
MCQ
Correct answer: this remote island are deprived of essential commodities needed
87
Complete the sentence by choosing an appropriate word from the given options. He has not _______ returned the money.
MCQ
Correct answer: yet
88
Select the most appropriate meaning of the given idiom. Call it a day
MCQ
Correct answer: Stop working on something
89
Select the most appropriate option to fill in the blank. His family lives _______ Mahu in Madhya Pradesh.
MCQ
Correct answer: at
90
Sentences of a paragraph are given below. While the first and the last sentences (S1 and S6) are in the correct order, the sentences in between are jumbled up. Arrange the sentences in the correct order to form a meaningful and coherent paragraph. S1. CV Raman’s story begins in a village near Tiruchirapalli (known in his days as Trichinopoly) in southern India. P. When he was four years old, Raman’s family moved to Vishakapatnam. Q. He was born on 8 November 1888, the second child of R Chandrashekara Iyer and Parvati Ammal. R. Chandrasekara Iyer was an athletic man and he took active interest in sports. S. His father took up a job there, as a lecturer in Mrs. AV Narsimha Rao College, where he taught physics, mathematics and physical geography. S6. His young son Raman was not physically very strong, but was very intelligent and he preferred to read books and work at his studies.
MCQ
Correct answer: QPSR
91
Select the most appropriate synonym of the given word. Abolish
MCQ
Correct answer: Cancel
92
Select the most appropriate option that can substitute the underlined segment in the given sentence. Harish is clever than wise.
MCQ
Correct answer: more clever than
93
Select the option that expresses the given sentence in indirect speech. The patient says, “I am fine.”
MCQ
Correct answer: The patient says that he is fine.
94
Select the option that expresses the given sentence in passive voice. I remember my mother taking me to the stadium.
MCQ
Correct answer: I remember being taken to the stadium by my mother.
95
Select the most appropriate synonym of the underlined word in the given sentence. Huxley was an exponent of Darwin’s theory of evolution.
MCQ
Correct answer: Proponent
96
Select the most appropriate article(s) to fill in the blanks. I was in ________ state of unconsciousness for about half ________ hour.
MCQ
Correct answer: a ; an
97
Select the most appropriate ANTONYM of the underlined word to fill in the blank. Allies have always come to his rescue in spite of his ____________ attempts to defame him.
MCQ
Correct answer: enemies’
98
In the following sentence, a few of the spellings are incorrect. Find out the sentence with correctly spelt words from the given options. He is wimsical by natur. No one can seek an explanation from him for his absurd atitude towards others.
MCQ
Correct answer: He is whimsical by nature. No one can seek an explanation from him for his absurd attitude towards others.
99
Select the most appropriate adverb to fill in the blank. ________, I'm going to walk my dog.
MCQ
Correct answer: Now
100
Rearrange the jumbled words and choose the alternative that correctly matches the given sentence. I missed the ________for the next. usually / hour / which / for / board / had / wait / an / bus / I / and / to
MCQ
Correct answer: bus which I usually board and had to wait for an hour
101
The torrid zone lies between _____________.
MCQ
Correct answer: Tropic of Cancer and Tropic of Capricorn
102
Match the following.
MCQ
Correct answer: 1-b, 2-c, 3-a
103
How many phases are involved in the census operations in India?
MCQ
Correct answer: Two
104
The number of atoms in exactly 12 g of carbon-12 is known as:
MCQ
Correct answer: Avogadro’s constant
105
Who among the following participated in the All-World Religious Conference (Parliament of Religions) held in 1893 in Chicago?
MCQ
Correct answer: Swami Vivekananda
106
The pH value of the curd is:
MCQ
Correct answer: lower than the pH value of milk
107
Choose the correct order of the following plateaus and mountain ranges from south to north of India.
MCQ
Correct answer: Deccan Plateau, Satpura Range, Vindhya Range, and Malwa Plateau
108
Which of the following statements regarding orographic rainfall is correct?
MCQ
Correct answer: This type of precipitation occurs when warm, humid air strikes on a mountain range.
109
Which of the following is NOT the feature of Fundamental Duties provided under the Constitution of India?
MCQ
Correct answer: Duties are enforceable by the law
110
Which of the following statements regarding the functions of money is/are true? 1. Money as a unit of account means it is a standard numerical unit of measurement of the market value of goods, services and other transactions. 2. Money as a standard of deferred payment is not a significant function because modern economies rarely use money for future payments.
MCQ
Correct answer: Only 1
111
When was International Anti-Corruption Day Celebrated in 2021 (an annual event) to raise awareness and find newer ways to combat corruption?
MCQ
Correct answer: 9 December
112
Which of the following duties is specified as the 10th Fundamental Duty in the Indian Constitution?
MCQ
Correct answer: To strive towards excellence in all spheres of individual and collective activity
113
Match the following microfinance concepts with their descriptions. List I (Concepts) List II (Descriptions) (a) Microcredit (i) Small, often peer-monitored savings products designed for low-income individuals (b) Microsavings (ii) Financial protection against specific perils for low-income populations (c) Microinsurance (iii) The use of group responsibility as a guarantee for loan repayment (d) Social Collateral (iv) Small loans provided to entrepreneurs too poor to qualify for traditional bank loans
MCQ
Correct answer: a-(iv), b-(i), c-(ii), d-(iii)
114
Central Vigilance Commission observed Vigilance Awareness Week 2022 with which of the following themes?
MCQ
Correct answer: Corruption free India for a developed Nation
115
In 2021, Union Minister Jitendra Singh inaugurated the X-band Doppler Weather Radar to provide improved forecasts. Where was it inaugurated?
MCQ
Correct answer: Jammu
116
Nataraja represents the dancing figure of which Hindu deity?
MCQ
Correct answer: Shiva
117
What is the cottony growth over a stale and moist bread known as?
MCQ
Correct answer: Fungi
118
What does the Ctrl + V shortcut key do?
MCQ
Correct answer: Pastes the copied content
119
Which option in the print dialog allows you to save a web page as a digital file instead of printing it?
MCQ
Correct answer: Save as PDF
120
In symmetric encryption, how many keys are used to encrypt and decrypt data?
MCQ
Correct answer: One Key
121
Which of the following best describes the primary difference between broadband and dial-up Internet connections?
MCQ
Correct answer: Dial-up uses a telephone line, while broadband uses various technologies for higher speeds.
122
Which of the following keyboard shortcuts is commonly used to rename a file or folder in Windows OS?
MCQ
Correct answer: F2
123
What does QR in 'QR code' stand for?
MCQ
Correct answer: Quick Response
124
What application software is utilised for managing extensive data collections and executing queries?
MCQ
Correct answer: Database management system software
125
Which of the following is an essential role of ROM in a computer system?
MCQ
Correct answer: Storing data permanently for boot-up processes
126
Which browser extension could be used to download an entire web page for offline use?
MCQ
Correct answer: Web ScrapBook
127
How can using a smiley or emoji help reduce misunderstandings in instant messaging?
MCQ
Correct answer: By clarifying the sender's tone or emotional intent
128
Which of the following protocols is commonly used for data encapsulation in WANs?
MCQ
Correct answer: High-Level Data Link Control
129
What is the function of the CPU following the commencement of a DMA transfer?
MCQ
Correct answer: It is free to perform other tasks while the transfer is handled by the DMA controller.
130
Which type of e-commerce model is exemplified by Amazon?
MCQ
Correct answer: B2C (Business to Consumer)
131
Keyboard shortcut to Save as document in MS Word 2019 is:
MCQ
Correct answer: F12
132
Which of the following is considered the first mechanical computer designed by Charles Babbage?
MCQ
Correct answer: Analytical Engine