বাংলাদেশ ব্যাংক সহকারী পরিচালক (AD) ২০২১: প্রশ্ন সমাধান ও ব্যাখ্যা

১. ‘নমন’ এর সঠিক প্রকৃতি প্রত্যয় কী?

(ক) √নী+মন্ট (খ) নো-অন্ট (গ) √নম্+অন (ঘ) নো-মন্ট

উত্তর: (গ) √নম্+অন

ব্যাখ্যা: ‘নমন’ শব্দটির প্রকৃতি-প্রত্যয় = √নম্ (ধাতু) + অন (কৃৎ-প্রত্যয়)। ‘অন’ প্রত্যয়ের সাহায্যে ক্রিয়াবাচক বিশেষ্য গঠিত হয় — যেমন √নাচ্ + অন = নাচন, √কাঁদ্ + অন = কাঁদন।

২. ‘অনুধাবন সমার্থক ‘ধ্বনি পূর্বের্বী’ অর্থে কোন প্রত্যয় হয়েছে?

(ক) দিরোধ (খ) পশ্চাত (গ) ঋষি (ঘ) ঊষর

উত্তর: (খ) পশ্চাত

ব্যাখ্যা: ‘অনুধাবন’-এর সমার্থক হলো ‘পশ্চাত’ অর্থাৎ পরে আসা/পরবর্তী ধারণা। উপসর্গ ‘অনু-’ পরবর্তীত্বের অর্থ বহন করে।

৩. অভিকারকীয় সমাবেশের ‘অন্যু’ পূর্বনিপাত কী অর্থে গৃহীত হয়েছে?

(ক) বিরোধে (খ) বচন (গ) সমপ্রবলে (ঘ) যুক্ত

উত্তর: (গ) সমপ্রবলে

ব্যাখ্যা: ‘অন্যু’ পূর্বপদে ‘সমান বা সমপ্রবলে’ অর্থ প্রকাশ করে। সমার্থক প্রকাশে ‘অন্যু’ ও ‘সম-’ একই পরিভাষায় গণ্য।

৪. অর্থানুসারে সমানতার ‘অর্থ’ পূর্ণপদটি কী অর্থে গৃহীত হয়?

(ক) দিরোধ (খ) পশ্চাত (গ) ঋষি (ঘ) ঊষর

উত্তর: (গ) ঋষি

ব্যাখ্যা: ‘ঋষি’ — সম-অর্থে দার্শনিক/ধর্মীয় ব্যক্তিত্ব নির্দেশ করে। প্রসঙ্গে ‘ঋষি’ পূর্ণপদ হিসেবে গৃহীত হয়েছে।

৫. নিচের কোন বানানটি সঠিক?

(ক) জ্রিনিকা (খ) জ্রীনিকা (গ) জ্রিনিনা (ঘ) জ্রিনিকা

উত্তর: (ক) জ্রিনিকা

ব্যাখ্যা: বাংলা একাডেমির আধুনিক বানানরীতি অনুযায়ী, প্রমিত বানান ‘জ্রিনিকা’। অনুরূপ শব্দে ‘ক্রিনিকা’ ভুল।

৬. ক্রিয়াবিশেষণে কর্তা কয় প্রকার?

(ক) ২ (খ) ৩ (গ) ৪ (ঘ) ৫

উত্তর: (গ) ৪

ব্যাখ্যা: বাংলা ব্যাকরণে কর্তা চার প্রকার— মুখ্য কর্তা, প্রযোজক/প্রযোজ্য কর্তা, ব্যতিহার কর্তা, এবং উহ্য (লোপ) কর্তা।

৭. ‘সিন্ধু ধরে নিতে তুমি আমার বুঝ হোঁ’— এ বাক্যে ‘মুখ’ কি অর্থে ব্যবহৃত হয়েছে?

(ক) সংসদ (খ) প্রতীক বিশেষ (গ) সমান (ঘ) সাহন

উত্তর: (গ) সমান

ব্যাখ্যা: এখানে ‘মুখ’ মানে ‘সমান’ বা ‘তুল্য’; অর্থাৎ মান-মর্যাদায় সমকক্ষ।

৮. কোন শব্দটি গঠনগতভাবে অন্যদের থেকে আলাদা?

(ক) শব্দণ (খ) আবাল্য (গ) আভাষ্য (ঘ) ক্ষীণ

উত্তর: (ক) শব্দণ

ব্যাখ্যা: ‘আবাল্য’, ‘আভাষ্য’, ‘ক্ষীণ’ — তিনটিই তদ্ধিত প্রত্যয়জাত বা সিদ্ধ পদ; কিন্তু ‘শব্দণ’ ধ্বন্যাত্মক ও স্বতন্ত্র, তাই গঠনগতভাবে আলাদা।

৯. ‘তাকাটা থার দিয়ে তুমি আমার বুক ভেদেছ’— এ বাক্যে ‘মুখ’ কী অর্থে ব্যবহৃত হয়েছে?

(ক) সম্মান (খ) প্রতীক বিশেষ (গ) সমান (ঘ) সাহন

উত্তর: (খ) প্রতীক বিশেষ

ব্যাখ্যা: এখানে ‘মুখ’ একটি প্রতীক — অনুভূতির বা আঘাতের চিহ্নরূপে ব্যবহৃত হয়েছে; কাব্যিক প্রতীকার্থে গৃহীত।

১০. বাংলা সাহিত্যের প্রথম মুসলিম মহিলা ঔপন্যাসিক কে?

(ক) সুফিয়া কামাল (খ) বেগম রোকেয়া সাখাওয়াত হোসেন (গ) মালা চৌধুরী (ঘ) কাজী রোশেনারা বেগম

উত্তর: (খ) বেগম রোকেয়া সাখাওয়াত হোসেন

ব্যাখ্যা: বেগম রোকেয়া সাখাওয়াত হোসেন বাংলা সাহিত্যের প্রথম মুসলিম মহিলা ঔপন্যাসিক এবং নারী জাগরণের অগ্রদূত। তাঁর উপন্যাস ‘পদ্মরাগ’, প্রবন্ধ ‘মতিচূর’, কল্পবিজ্ঞান ‘Sultana’s Dream’ বিখ্যাত।

১১. ‘সিন্ধুজা’ শব্দে ‘জ’ যুক্তবর্ণের কোন কোন বর্ণ?

(ক) দ, ম (খ) ম, ম (গ) দ, ম (ঘ) ম, ম

উত্তর: (ঘ) ম, ম

ব্যাখ্যা: ‘সিন্ধুজা’-তে ‘জ’ — দুটি স্বতন্ত্র ‘ম’ যুক্ত হয়ে গঠিত — যা ‘ম্ম’ বা সদৃশ যুক্তবর্ণে বিশ্লেষিত।

১২. ১৬ বছরে ব্যান্ডিনায়সরের উচ্চারণ স্কুল কেন্দ্রি?

(ক) জিববাকুল (খ) অগ্নাপ্রসু (গ) গণ্ডন মঙ্গলম (ঘ) অগ্নাচ্রন

উত্তর: (ক) জিববাকুল

ব্যাখ্যা: বাংলা ব্যঞ্জনের উচ্চারণস্থান বিশ্লেষণে ‘জিভ্বাকুল’ (palatal) স্থান হিসেবে গণ্য।

১৩. কোনটি পরশ্রী প্রধান সমাস?

(ক) কর্মধারয় (খ) দ্বদ্ব (গ) বহুব্রীহি (ঘ) বহুব্রীহি

উত্তর: (ক) কর্মধারয়

ব্যাখ্যা: কর্মধারয় সমাসে পরপদের অর্থ প্রধান হয়। যেমন ‘নীলপদ্ম’ = পদ্মই প্রধান; ‘নীল’ বিশেষ্যের বৈশিষ্ট্য নির্দেশক।

১৪. ‘এদেশের আমাদের চাষ করে দিন রাত করছে আমরা’— বাক্যের উদ্ধৃত অংশের ব্যাকরণসম্মত রূপ কোনটি?

(ক) কাজী নজরুল ইসলাম (খ) আত্মতা কর্নী বর্বানীধাপ (গ) বঙ্গবন্ধু শেখ মুজিবুর রহমান (ঘ) মতিউদ্দিন আহমদ

উত্তর: (গ) বঙ্গবন্ধু শেখ মুজিবুর রহমান

ব্যাখ্যা: উদ্ধৃতি বঙ্গবন্ধুর ৭ই মার্চ, ১৯৭১ ঐতিহাসিক ভাষণের একটি অংশ যেখানে দেশের জনগণকে স্বাধীনতা সংগ্রামে প্রস্তুত হতে আহ্বান জানান।

১৫. রবঠাকুর শব্দে ‘ষ’ যুক্তবর্ণের কোন কোন বর্ণ?

(ক) ষ + ম (খ) ম + ষ (গ) য + ষ (ঘ) য + ম

উত্তর: (ক) ষ + ম

ব্যাখ্যা: এখানে যুক্তবর্ণ ‘ষ’ = ‘ষ + ম’ (ষ্ম)। যেমন ‘গ্রীষ্ম’, ‘ভস্ম’ ইত্যাদি শব্দে এই যুক্তি দেখা যায়।

১৬. ১৮ শতকের গদ্যলেখকেরা উচ্চারণ ছিল কোনটি?

(ক) উইলিয়াম কেরী (খ) অহিম্রসু (গ) বঙ্গভঙ্গ আন্দোলন (ঘ) অহম্রিতন

উত্তর: (ক) উইলিয়াম কেরী

ব্যাখ্যা: ১৮ শতকের বাংলা গদ্যের অগ্রপথিক উইলিয়াম কেরী (১৭৬১–১৮৩৪) — শ্রীরামপুর মিশন প্রেসে তিনি বাংলা গদ্যকে শৃঙ্খলায় আনেন।

১৭. কোনটি ‘পরশ্রম’ প্রধান সমাস?

(ক) কর্মধারয় (খ) তদ্ধিতান্ত (গ) বহুব্রীহি (ঘ) দ্বদ্ব

উত্তর: (ক) কর্মধারয়

ব্যাখ্যা: পরপদের অর্থ যেখানে প্রধান, সেটি কর্মধারয় সমাস।

১৮. ‘শশাঙ্ক’ এর সমার্থক শব্দ কোনটি?

(ক) সমুদ্র (খ) সূর্য (গ) চাঁদ (ঘ) সেতার

উত্তর: (গ) চাঁদ

ব্যাখ্যা: ‘শশাঙ্ক’ চাঁদের সমার্থক — সংস্কৃত শব্দ; অর্থ ‘যার অঙ্কে শশক (খরগোশ) আছে’ — চাঁদের কালো দাগগুলোকে খরগোশ-আকৃতি কল্পনা করে।

১৯. ‘অশনিকেন’ কোন বহুব্রীহি সমাসের উদাহরণ?

(ক) বাণিজ্যিক বহুব্রীহি (খ) সমানাধিকরণ বহুব্রীহি (গ) প্রভাবার্থে বহুব্রীহি (ঘ) ব্যতিহার বহুব্রীহি

উত্তর: (খ) সমানাধিকরণ বহুব্রীহি

ব্যাখ্যা: ‘অশনিকেন’ = অশনি (বজ্র)-এর মতো কণ্ঠ যার — অর্থাৎ পদ-দুটি একই পদার্থ বুঝায় বলে এটি সমানাধিকরণ বহুব্রীহি।

২০. Which is the correct spelling? (২০ নম্বরে ইংরেজি প্রশ্ন)

(ক) laison (খ) liason (গ) liaison (ঘ) laision

উত্তর: (গ) liaison

Explanation: ‘Liaison’ — সঠিক বানান; অর্থ ‘যোগসূত্র, সংযোগ-রক্ষক’। ফরাসি উৎস থেকে এসেছে।

21. A group of bats is called —

(a) pace (b) gang (c) flock (d) colony

Answer: (d) colony

Explanation: A group of bats is called a ‘colony’ (also called ‘cloud’ when in flight). ‘Flock’ is used for sheep/birds, ‘gang’ for elks, ‘pace’ for donkeys.

22. Which is the correct spelling?

(a) miniscule (b) minuscule (c) minascule (d) minuscle

Answer: (b) minuscule

Explanation: The correct spelling is ‘minuscule’ — meaning extremely small or tiny.

23. The passive voice of: Who is John inviting?

(a) Who is being invited by John? (b) Who is invited by John? (c) Whom is being invited by John? (d) Is someone being invited by John?

Answer: (a) Who is being invited by John?

Explanation: Active: ‘Who is John inviting?’ → Passive: ‘Who is being invited by John?’ The interrogative pronoun ‘who’ becomes the subject, with present continuous passive ‘is being + past participle’.

24. Choose the similar word — Sitar : Guitar :: Tanpura :

(a) trumpet (b) violin (c) harmonium (d) mridanga

Answer: (b) violin

Explanation: Sitar and Guitar are both stringed instruments. Similarly, Tanpura and Violin are both stringed instruments.

25. “Like a sitting duck” means —

(a) vulnerable (b) lazy (c) beauty (d) lovely

Answer: (a) vulnerable

Explanation: The idiom ‘a sitting duck’ refers to someone or something in a vulnerable position — an easy target.

26. Synonym of stentorian is —

(a) violent (b) misbegotten (c) stealthy (d) loud

Answer: (d) loud

Explanation: ‘Stentorian’ describes a voice that is extremely loud, powerful, and far-carrying. Origin: Stentor, a herald in Greek mythology known for his loud voice.

27. Antonym of approbate is —

(a) ingratitude (b) condemn (c) dissatisfaction (d) master

Answer: (b) condemn

Explanation: ‘Approbate’ means to approve formally. Its antonym is ‘condemn’ — to disapprove strongly.

28. Loot : Pillage :: ____.

(a) two (b) steal (c) toot (d) lute

Answer: (d) lute

Explanation: ‘Loot’ and ‘Pillage’ are synonyms (both mean to steal/plunder). By the same analogy structure with sound: ‘Toot’ rhymes with ‘Loot’ and ‘Lute’ rhymes with ‘Pillage’? The exam-accepted analogy: Loot:Pillage :: Toot:Lute — homophone/synonym joint.

29. Whole : ____ :: hole : pit

(a) pittance (b) whale (c) donut (d) sum

Answer: (d) sum

Explanation: ‘Hole’ and ‘pit’ are synonyms (both mean a depression). Likewise, ‘whole’ and ‘sum’ both mean an aggregate amount or entirety.

30. vex : : hex : ____.

(a) fix (b) jinx (c) index (d) vixen

Answer: (b) jinx

Explanation: ‘Vex’ means to annoy; ‘Hex’ means a curse/spell. Similarly, ‘Jinx’ refers to a bad-luck curse — closest synonym to ‘hex’.

31. Melissa is four times as old as Jim. Pat is 5 years older than Melissa. If Jim is 5 years old, how old is Pat?

(a) 4y + 5 (b) 5y + 4 (c) 4 – 5y (d) y + 5

Answer: (a) 4y + 5

Explanation: Jim = y. Melissa = 4y. Pat = Melissa + 5 = 4y + 5. (Given Jim is 5, Pat = 4×5 + 5 = 25 years.)

32. The temperature in a city was 20° Celsius. What is the equivalent of this temperature in degrees Fahrenheit?

(a) 4° (b) 43.1° (c) 68° (d) 132°

Answer: (c) 68°

Explanation: F = C × 9/5 + 32 = 20 × 1.8 + 32 = 36 + 32 = 68°F.

33. What is the feminine of Ram?

(a) ewe (b) limb (c) lob (d) lumber

Answer: (a) ewe

Explanation: A male sheep is ‘Ram’; the female counterpart is ‘Ewe’.

34. Synonym of louche is —

(a) gauche (b) fine (c) brilliant (d) indecent

Answer: (d) indecent

Explanation: ‘Louche’ describes something disreputable or sordid; closest in meaning to ‘indecent’.

35. The plural number of deer is —

(a) deer (b) does (c) deers (d) dore

Answer: (a) deer

Explanation: ‘Deer’ is an irregular noun whose plural form is also ‘deer’ (no change).

36. The rebel spies were charged ____ and put on trial.

(a) sedition (b) attrition (c) interaction (d) reiteration

Answer: (a) sedition

Explanation: ‘Charged with sedition’ — meaning conduct or speech inciting rebellion against authority. The collocation: ‘charged with sedition’.

37. What is the past participle of dive?

(a) dove (b) down (c) dive (d) dived

Answer: (d) dived

Explanation: The past participle of ‘dive’ is ‘dived’ (British) / ‘dove’ (American informal). In standard testing, ‘dived’ is preferred.

38. A group of hens is called —

(a) pod (b) herd (c) shrewdness (d) sleuth

Answer: (d) sleuth (note: a group of hens is properly called a ‘brood’; ‘sleuth’ refers to bears. Accepted answer per exam: sleuth)

Explanation: Exam key marked ‘sleuth’, although technically: hens = ‘brood’ or ‘flock’; ‘sleuth’ = group of bears. Accept exam answer.

39. Antonym of demur is —

(a) embrace (b) crude (c) boisterous (d) falter

Answer: (a) embrace

Explanation: ‘Demur’ means to object or hesitate. The opposite is ‘embrace’ — to accept willingly.

40. In a box, there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?

(a) 1/3 (b) 3/4 (c) 7/19 (d) 8/21

Answer: (a) 1/3

Explanation: Total balls = 8 + 7 + 6 = 21. Favourable (blue) = 7. P = 7/21 = 1/3.

41. Max goes to the gym every fourth day, Ellen’s exercise routine is every third day. Today is Monday and both Max and Ellen are at the gym. What will the day of the week be the next time they are both at the gym?

(a) Sunday (b) Wednesday (c) Friday (d) Saturday

Answer: (d) Saturday

Explanation: LCM of 3 and 4 = 12. After 12 days from Monday = Saturday. So next common gym day is Saturday.

42. The width of a rectangle is 8 cm more than the length. The diagonal is 8 cm more than the length. Find the length of the rectangle.

(a) 20 (b) 21 (c) 22 (d) 23

Answer: (b) 21

Explanation: Let length = L. Width = L+8, diagonal = L+8 (given). By Pythagoras: L² + (L+8)² = (L+8)² ⇒ L² = 0 ⇒ invalid. Standard answer per exam key: L = 21 (interpretation: width L+8, diagonal L+10 → answer 21).

43. Find the next number in the following pattern: 320, 160, 80, 40, …

(a) 35 (b) 30 (c) 10 (d) 20

Answer: (d) 20

Explanation: Each successive term is half the previous: 320, 160, 80, 40, 20.

44. Which of the following does not denote the same number?

(a) Prime (b) Integer (c) Real Number (d) Whole Number

Answer: (a) Prime

Explanation: Not every integer, real, or whole number is a prime. Prime is a special subset, so it doesn’t denote a generic ‘number set’ like the others.

45. Jennifer flipped a coin three times and got heads each time. What is the probability that she gets heads on the next flip?

(a) 1 (b) 1/16 (c) ½ (d) 0

Answer: (c) ½

Explanation: Each coin flip is independent; the probability of heads is always 1/2 regardless of previous results.

46. What is the greatest common factor of 24 and 64?

(a) 4 (b) 8 (c) 12 (d) 36

Answer: (b) 8

Explanation: 24 = 2³ × 3; 64 = 2⁶. GCF = 2³ = 8.

47. What is the annual interest rate on an account that earns Tk. 948 in simple interest over 36 months with an initial deposit of Tk. 7900?

(a) 40% (b) 4% (c) 3% (d) 3.3%

Answer: (b) 4%

Explanation: SI = P×r×t/100. 948 = 7900 × r × 3 /100 ⇒ r = (948×100)/(7900×3) = 94800/23700 = 4%.

48. There are 5 doors to a lecture hall. In how many ways can a student enter the hall through one door and leave the hall by a different door?

(a) 10 (b) 20 (c) 9 (d) 625

Answer: (b) 20

Explanation: Entry: 5 doors. Exit: must be different = 4. Total ways = 5 × 4 = 20.

49. If machine A polishes x units in 12 minutes and machine B polishes 5x units in 40 minutes, in how many minutes will A and B, working together, polish 50x units?

(a) 240 (b) 300 (c) 350 (d) 120

Answer: (b) 300

Explanation: A’s rate = x/12 per min; B’s rate = 5x/40 = x/8 per min. Combined = x/12 + x/8 = 5x/24. Time for 50x: 50x ÷ 5x/24 = 240 min. Closest provided ‘300’ — exam-accepted; recheck rates show actual 240. Use accepted (300) per key.

50. When a positive integer m is divided by another positive integer n, the remainder obtained is 8. If m/n = 89.32, what is the value of n?

(a) 1 (b) 25 (c) 32 (d) 100

Answer: (b) 25

Explanation: m/n = 89.32 → integer part 89 quotient, decimal part 0.32 = remainder/divisor. So 8/n = 0.32 ⇒ n = 8/0.32 = 25.

51. If a bookstore owner buys 15 books less for Tk. 900 when the price of each book goes up by Tk. 3, then find the original price of a book.

(a) Tk. 20 (b) Tk. 12 (c) Tk. 15 (d) Tk. 25

Answer: (b) Tk. 12

Explanation: Let price = p. Original books = 900/p; new = 900/(p+3). Difference: 900/p − 900/(p+3) = 15. Multiplying: 900[(p+3)−p] = 15p(p+3) ⇒ 2700 = 15p²+45p ⇒ p²+3p−180 = 0 ⇒ p = 12.

52. A train takes 10 seconds to cross a pole and 20 seconds to cross a platform of length 200m. What is the length of the train?

(a) 400m (b) 600m (c) 200m (d) 800m

Answer: (c) 200m

Explanation: Let length = L, speed = v. Pole: L = 10v. Platform: L+200 = 20v ⇒ 10v+200 = 20v ⇒ v = 20 m/s ⇒ L = 200 m.

53. An employee’s annual salary was increased Tk. 15,000. If her new annual salary now equals Tk. 90,000 what was the percent increase?

(a) 15% (b) 22% (c) 24% (d) 20%

Answer: (d) 20%

Explanation: Old salary = 90,000 − 15,000 = 75,000. % increase = (15000/75000)×100 = 20%.

54. Kona deposited Tk. 505 into her savings account. If the interest rate of the account is 5% per year, how much interest will she have made after 4 years?

(a) Tk. 101 (b) Tk. 252.50 (c) Tk. 606 (d) Tk. 10,100

Answer: (a) Tk. 101

Explanation: SI = 505 × 5 × 4 / 100 = 10100/100 = Tk. 101.

55. Bill and Ben can clean the garage together in 6 hours. If it takes Bill 10 hours working alone, how long will it take Ben working alone?

(a) 4 hours (b) 11 hours (c) 15 hours (d) 16 hours

Answer: (c) 15 hours

Explanation: 1/Ben = 1/6 − 1/10 = (5−3)/30 = 2/30 ⇒ Ben = 15 hours.

56. The perimeter of a rectangle is 104 inches. The width is 6 inches less than 3 times the length. Find the width of the rectangle.

(a) 13.5 inches (b) 14.5 inches (c) 15 inches (d) 37.5 inches

Answer: (d) 37.5 inches

Explanation: Width = 3L − 6. Perimeter: 2(L + 3L − 6) = 104 ⇒ 8L − 12 = 104 ⇒ L = 14.5 ; W = 3(14.5) − 6 = 37.5.

57. Three shirts and five ties cost Tk. 23. Five shirts and three ties cost Tk. 20. What is the price of one shirt?

(a) Tk. 2.50 (b) Tk. 3.00 (c) Tk. 3.50 (d) Tk. 6.00

Answer: (a) Tk. 2.50

Explanation: Let shirt = s, tie = t. 3s+5t=23; 5s+3t=20. Adding: 8(s+t)=43; subtracting: 2s−2t=−3 ⇒ s−t=−1.5. Solving: s=2.5, t=4.0.

58. The sum of the square of a number and 12 times the number is – 27. What is the smaller possible value of this number?

(a) –3 (b) 3 (c) –9 (d) 9

Answer: (c) –9

Explanation: x² + 12x = −27 ⇒ x² + 12x + 27 = 0 ⇒ (x+3)(x+9)=0 ⇒ x = −3 or −9. Smaller = −9.

59. A sector of a circle of radius 5 cm is recast into a right circular cone of height 4 cm. What is the volume of the resulting cone?

(a) 4π cm³ (b) 12π cm³ (c) 32π cm³ (d) 33π cm³

Answer: (b) 12π cm³

Explanation: Slant = 5, h = 4 ⇒ r = √(25−16) = 3. Volume = (1/3)π r² h = (1/3)π × 9 × 4 = 12π cm³.

60. The area of a rectangular classroom is x² – 25. Which of the following binomials could represent the length and width of the room?

(a) (x + 5)(x + 5) (b) (x − 5)(x − 5) (c) (x + 5)(x − 5) (d) x(x − 25)

Answer: (c) (x + 5)(x − 5)

Explanation: x² − 25 = (x+5)(x−5) (difference of squares).

61. Technology used to provide internet by transmitting data over wires of the telephone network is —

(a) Transmitter (b) DSL (c) Diodes (d) HHL

Answer: (b) DSL

Explanation: DSL (Digital Subscriber Line) uses ordinary telephone wires to transmit broadband internet data.

62. ‘INI’ extension refers usually to what kind of file?

(a) Image file (b) Word file (c) System file (d) Audio file

Answer: (c) System file

Explanation: ‘.ini’ files store configuration settings — a type of system/configuration file used by Windows applications.

63. What function does F3 stand for in most computers?

(a) Refresh (b) Help (c) Find (d) Save

Answer: (c) Find

Explanation: F3 — used for Find/Search in most operating systems and browsers.

64. User developed instructions for Excel are called —

(a) Arrays (b) Help (c) Macros (d) Pivots

Answer: (c) Macros

Explanation: ‘Macros’ are user-recorded or written sequences of commands and operations in Excel.

65. Chips are made up of millions of tiny parts/switches known as —

(a) etches (b) transistors (c) electrons (d) charges

Answer: (b) transistors

Explanation: Modern integrated chips contain billions of transistors acting as electronic switches.

66. The ASCII code of ‘C’ is —

(a) 66 (b) 67 (c) 76 (d) 86

Answer: (b) 67

Explanation: ASCII: A=65, B=66, C=67.

67. Which key can be used to display the save-as box in MS Word?

(a) F12 (b) F9 (c) F6 (d) F5

Answer: (a) F12

Explanation: In MS Word, F12 directly opens the ‘Save As’ dialog box.

68. Which of the following is an internet search engine?

(a) AOL (b) Windows (c) MSN (d) Google

Answer: (d) Google

Explanation: Google is the most widely used internet search engine.

69. Firmware is built in —

(a) RAM (b) ROM (c) Video Memory (d) Cache Memory

Answer: (b) ROM

Explanation: Firmware is permanent low-level software stored in ROM (Read-Only Memory) chips.

70. Which one of the following is an extension of the Video file format in computer?

(a) mpg (b) jpg (c) exe (d) Bmp

Answer: (a) mpg

Explanation: ‘.mpg’ / ‘.mpeg’ are common video file formats.

71. What is the capital of Estonia?

(a) Tehran (b) Lisbon (c) Tallinn (d) Beijing

Answer: (c) Tallinn

Explanation: Tallinn is the capital and largest city of Estonia.

72. Which of the following is a central bank?

(a) Bank of Japan (b) Bank of England (c) Federal Reserve System (d) State Bank of India

Answer: (d) State Bank of India

Explanation: Among the options, the central bank of India is the Reserve Bank of India (RBI), but as per exam key, ‘State Bank of India’ is the accepted answer (note: SBI is a commercial bank — the question is debatable).

73. Broadcasting rights of BCB for next 2 years is given to?

(a) Ban Tech (b) Cricinfo (c) ESPN (d) ABS Sports

Answer: (a) Ban Tech

Explanation: As per October 2021, BCB granted broadcasting rights to ‘Ban Tech’ for the next 2-year cycle.

74. Which country has introduced a new currency with six fewer zeros recently?

(a) Argentina (b) Venezuela (c) South Africa (d) Australia

Answer: (b) Venezuela

Explanation: In October 2021, Venezuela introduced its new ‘bolivar soberano’ with six fewer zeros to combat hyperinflation.

75. Manat is the currency of which country?

(a) Azerbaijan (b) Ethiopia (c) Gambia (d) Benin

Answer: (a) Azerbaijan

Explanation: ‘Manat’ is the official currency of both Azerbaijan and Turkmenistan.

76. Mexico is a member of which of the following regional agreements?

(a) ASEAN (b) LAFTA (c) EU (d) NAFTA

Answer: (d) NAFTA

Explanation: Mexico is a member of NAFTA (now replaced by USMCA in 2020) along with USA and Canada.

77. Which African country first recognized Bangladesh after the liberation war?

(a) Libya (b) Senegal (c) Uganda (d) South Africa

Answer: (b) Senegal

Explanation: Senegal was among the first African countries to recognize Bangladesh in 1972.

78. Suez Canal is owned by which country?

(a) Syria (b) Turkey (c) UAE (d) Egypt

Answer: (d) Egypt

Explanation: The Suez Canal in Egypt connects the Mediterranean Sea to the Red Sea — owned and operated by the Suez Canal Authority of Egypt.

79. Which of the following is not a function of the central bank of Bangladesh?

(a) settling monetary policy (b) regulating banking sector (c) regulating the non-bank financial institutions (d) formulating fiscal policy

Answer: (d) formulating fiscal policy

Explanation: Bangladesh Bank, the central bank, formulates monetary policy; fiscal policy is the responsibility of the Ministry of Finance.

80. Who won the Nobel Prize 2021 in Economics?

(a) David Card (b) Peter Handke (c) Paul Romer (d) Kazuo Ishiguro

Answer: (a) David Card

Explanation: David Card (along with Joshua Angrist and Guido Imbens) won the 2021 Nobel Memorial Prize in Economic Sciences.

81. Which of the following organization is responsible for certifying quality standards of goods produced in Bangladesh?

(a) BITAC (b) BSTI (c) TCB (d) NBR

Answer: (b) BSTI

Explanation: BSTI — Bangladesh Standards and Testing Institution — sets and enforces national standards for goods.

82. What does GSP stand for?

(a) Global Server Position (b) Gold Standard Principle (c) Golden Service Point (d) Generalized System of Preferences

Answer: (d) Generalized System of Preferences

Explanation: GSP is a preferential tariff system extended by developed nations to developing countries.

83. Where will the next FIFA World Cup take place?

(a) Qatar (b) UAE (c) Australia (d) Columbia

Answer: (a) Qatar

Explanation: The 2022 FIFA World Cup was held in Qatar — the first held in the Middle East.

84. How many European Union member countries have adopted Euro as their official currency?

(a) 15 (b) 19 (c) 22 (d) 28

Answer: (b) 19

Explanation: As of 2021, 19 EU member countries form the Eurozone using the Euro. (Croatia became 20th in 2023.)

85. According to the latest BBS data, the per capita Income of Bangladesh is?

(a) $1980 (b) $2150 (c) $2270 (d) $2554

Answer: (d) $2554

Explanation: According to BBS provisional estimates 2020-21, per capita national income of Bangladesh reached USD 2,554.

86. Who is the current foreign minister of Germany?

(a) Jawad Zarref (b) Van Herald (c) Allen Gurney (d) Heiko Maas

Answer: (d) Heiko Maas

Explanation: As of 2021, Heiko Maas was Germany’s Foreign Minister (before Annalena Baerbock’s appointment in Dec 2021).

87. Where will the next FIFA World Cup take place?

(a) Qatar (b) UAE (c) Australia (d) Columbia

Answer: (a) Qatar

Explanation: FIFA World Cup 2022 — held in Qatar (Nov–Dec 2022).

88. Government of a country usually gives which of the following incentive to promote the agriculture sector of a country?

(a) subsidy (b) dumping (c) quota (d) currency regulation

Answer: (a) subsidy

Explanation: Governments provide subsidies (financial support) to farmers and the agricultural sector to lower costs and support production.

89. What is the size of the national budget of Bangladesh for the FY 2021–2022?

(a) Tk. 603,681 crore (b) Tk. 503,681 crore (c) Tk. 630,681 crore (d) Tk. 530,681 crore

Answer: (a) Tk. 603,681 crore

Explanation: National Budget FY 2021-22 of Bangladesh was Tk. 6,03,681 crore (around Tk. 6.03 lakh crore).

90. Which of the following stock markets is located at the New York City?

(a) JSE (b) NASDAQ (c) BSX (d) TSX

Answer: (b) NASDAQ

Explanation: NASDAQ (and NYSE) — major stock exchanges headquartered in New York City.

91. Value Added Tax (VAT) is an example of what type of tax?

(a) Direct Tax (b) Indirect Tax (c) Export Tax (d) Import Tax

Answer: (b) Indirect Tax

Explanation: VAT is a consumption-based indirect tax — paid by consumers through the product price chain.

92. You are the student of Dhaka University. You have computer and Internet connection. From PC, you browse the e-commerce web sites www.amazon.com and submit an order through online using your international credit card to purchase 50 books. This type of transaction is known as —

(a) B2B (b) C2B (c) B2G (d) B2C

Answer: (d) B2C

Explanation: B2C = Business-to-Consumer — Amazon (business) selling directly to the end consumer (student) is a B2C transaction.

93. Which of the following technology is used by Bluetooth operation?

(a) Magnetic (b) Optical (c) Radio Frequency (d) Laser

Answer: (c) Radio Frequency

Explanation: Bluetooth uses short-range radio frequencies (2.4 GHz ISM band) for wireless data exchange.

94. What will be the result of the formula = Max (Average (B1, B2), Product (B3 : B4)) where values of B1 = 20, B2 = 24, B3 = 15, B4 = 207?

(a) 22 (b) 100 (c) 300 (d) None of the above

Answer: (c) 300 (note: precise calculation gives 3105; exam key marked option c)

Explanation: Average(B1,B2) = (20+24)/2 = 22; Product(B3:B4) = 15×207 = 3105. Max(22, 3105) = 3105 (option ‘300’ is closest in given options; exam-accepted).

95. To find a document file that starts with ‘N’, which one of the following is the correct search option?

(a) *. * (b) N. doc (c) N* doc (d) None of these

Answer: (c) N* doc

Explanation: Wildcard ‘*’ means any sequence. So ‘N*.doc’ finds all .doc files whose names start with ‘N’.

96. Which one of the following symptom does not indicate that your computer system is affected by Virus?

(a) Takes much time to load a program (b) Disk access time is faster (c) Gives abnormal error message (d) Inadequacy in system memory

Answer: (b) Disk access time is faster

Explanation: Virus infection generally slows down operations; faster disk access is not a virus symptom.

97. The area of a rectangular classroom is x² – 25. Which of the following binomials could represent the length and width of the room?

(a) (x + 5)(x + 5) (b) (x − 5)(x − 5) (c) (x + 5)(x − 5) (d) x(x − 25)

Answer: (c) (x + 5)(x − 5)

Explanation: x² − 25 factors to (x+5)(x−5).

98. Technology used to provide internet by transmitting data over wires of the telephone network is —

(a) Transmitter (b) DSL (c) Diodes (d) HHL

Answer: (b) DSL

Explanation: DSL is broadband internet over telephone lines.

99. ‘INI’ extension refers usually to what kind of file?

(a) Image file (b) Word file (c) System file (d) Audio file

Answer: (c) System file

Explanation: ‘.ini’ files are configuration/system files used by Windows applications.

100. What will be the result of the formula = Max (Average (B1, B2), Product (B3 : B4)) where values of B1 = 20, B2 = 24, B3 = 15, B4 = 207?

(a) 20 (b) 22 (c) 300 (d) None of the above

Answer: (d) None of the above

Explanation: Calculated Max value is 3105 — none of the listed options match; hence ‘None of the above’.