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This section includes 7 InterviewSolutions, each offering curated multiple-choice questions to sharpen your Current Affairs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
A wooden block, with a coin placed on its top, floats in water as shown in figure. The distance l and h are shown here. After some time the coin falls into water. Then A. l decrease and h increasesB. l increases and h decreasesC. both l and h increasesD. both l and h decrease |
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Answer» Correct Answer - D |
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| 2. |
The range of water flowing out of a small hole made at a depth `10 m` below water surface in a large tank is `R`. Find the extra pressure (in atm) applied on the water surface so that range becomes `2R`. Take `1atm=10^(5)Pa`. |
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Answer» Correct Answer - 3 Initial velocity of efflux: `v_1=sqrt(2gh)` For range to become double, velocity of efflux should be doubled: `v_2=2_(v_1)=2sqrt(2gh)` Let extra pressur applied be p, then `(p_0+p_0+pgh)-p_0=1/2pv_2^2` `implies p+pgh=1/2p8gh` `impliesp+3rhogh=3xx10^3xx10xx10xx10=3xx10^5Pa=3atm` |
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| 3. |
The capacitance of a capacitor between` 4//3` times its original value if a dielectric slab of thickness `t=d//2` is inserted between the plates (d is the separation between the plates). What is the dielectric consant of the slab? |
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Answer» `(epsilon_(0)A)/([d-(d)/(2)+(d)/(2k)])=(4)/(3)(epsilon_(0)A)/(d)` or `(1)/((d)/(2)(1+(1)/(K)))=(4)/(3d)` on solving we get `K=2` |
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| 4. |
His father had ________ him how to make model airplanes. A) planned B) guided C) taught D) learnt E) described |
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Answer» Correct option is C) taught |
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| 5. |
Statement (I) : Commerical airplanes save fuel by flying at higher altitudes during long trips. Statement (II) : At higher altitudes, the ambient temperature and the Carnot efficiency are low.(a) Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I) (b) Both statement (I) and Statement (II) are individually true but Statement (II) is NOT the correct explanation of Statement (I) (c) Statement (I) is true but Statement (II) is false (d) Statement (I) is false but Statement (II) is true |
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Answer» (b) Both statement (I) and Statement (II) are individually true but Statement (II) is NOT the correct explanation of Statement (I) Both statement is correct. But statement II not explain the reason. At higher altitude the rate of decrease of thrust is less than the rate of decrease of density with altidue because some loss due reduced density is compensated by lesser drag. Due to considerable reduction in drag (at an altitude of 800 m, normal hight of commercial planes the drag is reduced than 25% of sea level drag) most of the commercial plane flying at high altidue. At high altidue temperature decreases so, the cycle maximum temperature So, the cycle maximum temperature rise will decrease leads to decrease in carnot efficiency. |
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| 6. |
What is more precious than diamond or silver or gold? |
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Answer» Brotherhood and peace is more precious than diamond and gold. We can not enjoy them unless we have peace and brotherhood in the society. |
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| 7. |
The first transition element is-(a) Chromium(b) Scandium (c) Nickel(d) Copper |
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Answer» The first transition element is Scandium. |
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| 8. |
For the gasesous reaction, `2NO_(2)hArrN_(2)O_(4)`, calculate `DeltaG^(@)` and `K_(p)` for the reaction at `25^(@)C`. Given `G_(fN_(2)O_(4))^(@)` and `G_(fNO_(2))^(@)` are `97.82` and `51.30kJ` respectively. Also calculate `DeltaG^(0)` and `K_(p)` for reverse reaction.A. `6.88 atm`B. `0.332 atm`C. `3.12 atm`D. `0.145 atm` |
| Answer» Correct Answer - D | |
| 9. |
The value of `K_(P)` for `NH_(2)COONH_(4(s))hArr 2NH_(2(g))+CO_(2(g))` if the total prassure at equilibrium si `P` `:-`A. `(2)/(27)P^(3)`B. `(4)/(27)P^(3)`C. `(27)/(2)P^(3)`D. `(27)/(4)P^(3)` |
| Answer» Correct Answer - B | |
| 10. |
A hypothetical reaction `:` `A_(2)+B_(2)rarr 2AB` Follows mechanism as given below `:` `A_(2) overset(k_(c))hArr A+A................(` fast `)" "(k_(C)-` is equilibrium constant ) `A+B_(2)overset(k_(1))rarrAB+B...............(" slow")" "(k_(1)-` rate constant ) `A+B underset(K_(2))overset(k_(2))hArrAB...............(` fast `)" "(k_(2),k_(3)-` are rate constant`)` Give the rate law.A. `r=k_(1)sqrt(k_(c))[A_(2)]^(1//2)[B_(2)]`B. `r=(k_(1))/(k_(c))[A_(2)]^(1//2)[B_(2)]`C. `r=sqrt(k_(1)k_(c))[A_(2)]^(1//2)[B_(2)]`D. `r=(k_(1))/(sqrt(k_(c)))[A_(2)]^(1//2)[B_(2)]` |
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Answer» Correct Answer - A Rate of governed by slowest step `A+B overset(k_(1))rarr AB+B` `r=k_(1)[A][B_(2)]" "……(i)` From `A_(2)overset(k_(c))hArrA+A` `k_(c)=([A]^(2))/([A_(2)])" ".....(ii)` `[A]=sqrt(k_(c))[A_(2)]^(1//2)` `r=k_(1)sqrt(k_(c))[A_(2)]^(1//2)[B_(2)]" order is "=(1)/(2)+1=(3)/(2)` |
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| 11. |
In the story 'The Third Level', the narrator says the above line because he found a letter that __________. That night, among my oldest first-day covers, I found one that shouldn’t have been there. A. he was not happy to discover B. had been written by his grandfather C. his grandfather had never told him about D. wasn't part of his grandfather's original collection |
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Answer» D. wasn't part of his grandfather's original collection |
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| 12. |
Lucy says she bought her new trouser suit in ________. A) a disposal B) a sale C) a reduction D) an offering E) a productio |
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Answer» Correct option is B) a sale |
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| 13. |
Fill in the blanks by choosing the appropriate expressions given in brackets:The narrator says he conceived the story The Gardener’ ........... The old man he met in a coconut grove had come to the garden seeking work. The owner needed a man exactly like him and asked the old man to ............. (in a flash, stay on, vanish into thin air) |
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Answer» in a flash; stay on. |
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| 14. |
When I was turning out my cupboard I ________ this photograph of uncle Harry. A) came over B) came round C) came acrossD) came to E) came into |
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Answer» Correct option is C) came across |
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| 15. |
Before ______ to the meeting, Harry was at his office. A) to come B) comes C) came D) coming |
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Answer» Correct option is D) coming |
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| 16. |
Two moles of `PCl_(5)` were heated at `327^(@)C` in a closed two litre vessel and when equilibrium was reached, `PCl_(5)` was found to be 40% dissociated into `PCl_(3)` and `Cl_(2)` The equilibrium constant `K_(rho)` for the above reaction is (approx)A. 13.14 `atm^(-1)`B. 13.14 atmC. 6.52 atmD. 6.52 `atm^(-1)` |
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Answer» Correct Answer - D `-underset(..)overset(..)(O)-CH_(3)` increases the `e^(-)` density in ring due to +M. `-underset(..)overset(..)(O)-H` increases the `e^(-)` density in ring due to +M. `-underset(..)overset(..)(O)-overset(O)overset(||)(C)-CH_(3)` increases the `e^(-)` density in ring due to +M. -CN is a strong `e^(-)` withdrawing group, so it decreases the `e^(-)` density from the ring. |
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| 17. |
Thermodynamics is applicable to ……(a) Macroscopic system only (b) Microscopic system only (c) Homogenous system only (d) Heterogeneous system only |
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Answer» (a) Macroscopic system only |
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| 18. |
If `500 mL` of a `5M` solution is diluted to `1500 mL`, what will be the molarity of the solution obtained ?A. `1.5 M`B. `1.66 M`C. `0.017 M`D. `1.59 M` |
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Answer» Correct Answer - B If `500 mL` of a `5M` solution is diluted ………….. `M_(i)V_(i) = M_(t)V_(t)` `5xx500= M_(t)xx1500` or `M_(t) = 1.66M` |
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| 19. |
Correct IUPAC name of following compound is: `Hoverset(O)overset(||)(C)-underset(COOH)underset("| ")(CH)-overset(NH_(2))overset("| ")(CH)-COOH`A. 2-amino-2-formylbutan-1,4-dioic acidB. 2-formyl-3amino butan-1,2-dioic acidC. 3-amino-2-form ylbuatan-1,4-dioic acidD. 2-amino-3-carboxy4-oxobutanoic acid |
| Answer» Correct Answer - A | |
| 20. |
To an eudiometry tube 20 ml of `A_((g))`, 40ml of `B_((g))`, 30ml of `D_((g))` and 60 ml of `C_((g))` is introduced & subjected to sparking to cause following reation with 100% extent. Calculate the volume change involved due to sparking. `2A_((g)) + 4B_((g)) to 3P_((g)) + Q_((l))` `3C_((g)) + D_((g)) to 2P_((g)) + 4R_((g))`A. 10 m l expansionB. no volume changeC. 30 ml contractionD. 50 ml expansion |
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Answer» Correct Answer - 1 `{:(2A_((g)),+,4B_((g)),to,3P_((g)),+,Q_((l))),(20,,40,,,,),(x,,x,,30 nl,,DeltaV=-30 ml),(3C_((g)),+,D_((g)) , to , 2P_((g)),+,4R_((g))),(60,,30,,,,),(x,,10,,40 ml,,80 ml " " DeltaV=40 ml):}` |
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| 21. |
The Rutherford `alpha`-particle experiment shown that most of the `alpha`-particles pass through almost unscattered while some are scattered through large angles. What infromation does it given about the structure of the atom ?A. Atoms is hollowB. The whole mass of the atom is concetration in a small centre called nucleusC. Nucleus is positively chargedD. All the above |
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Answer» Correct Answer - D Experimental observation. |
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| 22. |
The portion of the immunoglobulin molecule that binds the specific antigen is formed by (A) Variable regions of H and L chains (B) Constant region of H chain (C) Constant region of L chain (D) Hinge region |
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Answer» (A) Variable regions of H and L chains |
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| 23. |
Calorific value of alcohol is (A) 4 kcal/gm (B) 5.4 kcal/gm (C) 7 kcal/gm (D) 9 kcal/gm |
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Answer» (C) 7 kcal/gm |
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| 24. |
Calorific value of proteins as determined in a bomb calorimeter is (A) 4 kcal/gm (B) 4.8 kcal/gm (C) 5.4 kcal/gm (D) 5.8 kcal/gm |
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Answer» (C) 5.4 kcal/gm |
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| 25. |
Each myoglobin molecule contains (A) One iron atom (B) Two iron atoms (C) Four iron atoms (D) Six iron atoms |
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Answer» (A) One iron atom |
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| 26. |
Specific dynamic action of proteins is about (A) 5% (B) 13% (C) 20% (D) 30% |
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Answer» Correct option (D) 30% |
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| 27. |
About 5% of the total body, iron is present in (A) Transferrin (B) Myoglobin (C) Cytochromes (D) Haemosiderin |
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Answer» (B) Myoglobin |
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| 28. |
Proteins have the SDA: (A) 5% (B) 10% (C) 20% (D) 30% |
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Answer» Correct option (D) 30% |
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| 29. |
Specific dynamic action of carbohydrates is about (A) 5% (B) 13% (C) 20% (D) 30% |
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Answer» Correct option (A) 5% |
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| 30. |
Respiratory quotient of carbohydrates is about (A) 0.5 (B) 0.7 (C) 0.8 (D) 1.0 |
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Answer» Correct option (D) 1.0 |
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| 31. |
At a respiratory quotient of 0.85, every litre of oxygen consumed represents an energy expenditure of (A) 5.825 kcal (B) 4.825 kcal (C) 3.825 kcal (D) 2.825 kcal |
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Answer» (B) 4.825 kcal |
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| 32. |
R.Q. of carbohydrates is about (A) 0.75 (B) 0.80 (C) 0.85 (D) 1.0 |
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Answer» Correct option (D) 1.0 |
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| 33. |
R.Q. of mixed diet is about (A) 0.70 (B) 0.80 (C) 0.85 (D) 1.0 |
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Answer» Correct option (C) 0.85 |
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| 34. |
It was a bright night. People, cheerful and gaily dressed, strolled around the fair, listening to the sound of the drums that are usually played during the festival. However... |
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Answer» It was a bright night. People, cheerful and gaily dressed, strolled around the fair, listening to sound of drums that are usually played during the festival. However, children were playing with crackers. The girls were busy in decorating their houses; they also decorated their rooms with beautiful color paper lanterns. That was giving them glamorous look. It was a Diwali night. All the people were very happy on this occasion. |
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| 35. |
A healthy 70 kg man eats a well balanced diet containing adequate calories and 62.5 g of high quality protein per day. Measured in grams of nitrogen, his daily nitrogen balance would be (A) +10 g (B) +6.25 g (C) 0 g (D) –6.25 g |
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Answer» Correct option (C) 0 g |
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| 36. |
What is the function of select and project operation ? |
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Answer» The select operation selects tuples from a relation that satisfy a given condition. The selection is denoted by lowercase Greek letter σ (sigma). The project operation yields a “vertical” subset of a given relation in contrast to the “horizontal” subset returned by select operation. The projection lets you select specified attributes in a specified order. Projection is denoted by Greek letter pi(π). |
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| 37. |
What do you mean by relational database? |
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Answer» A relational database is a collection of data items organized as a set of formally described tables from which data can be accessed easily. |
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| 38. |
In young’s double slit experiment, the fringe width is 12mm. If the entire arrangement is placed in water of refractive index 4/3, then the fringe width becomes (in mm)(A) 16(B) 9(C) 48(D) 12 |
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Answer» Correct option is (B) 9 For a given light wavelength corresponding a medium of refractive index µ \(\lambda_{med} = \frac{\lambda_{vacuum}}\mu\) and we know that fringe width \(\beta = \frac {\lambda D} d\) Therefore, \(\beta_{med} = \frac{\beta_{vacuum}}\mu= \frac{12}{\frac 43} = 9 mm\) |
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| 39. |
Only 2% of the optical source frequency is the available channel bandwidth for an optical communicating system operating at 1000 nm. If an audio signal requires a bandwidth of 8 kHz, how many channels can be accommodated for transmission : (A) 375 x 107 (B) 75 x 107 (C) 375 x 108 (D) 75 x 109 |
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Answer» Correct option is (B) 75 x 107 Frequency at 1000 nm = 3 x 10/ 1000 x 10-9 ⇒ 3 x 1014 Hz available for channel band width = 2/100 x 3 x 1014 ⇒ 6 x 1012 Hz Bandwidth for 1 channel = 8000 Hz ∴ No. of channel 6x1012/ 8x103 ⇒ 600/8 x 107 = 75 x 107 |
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| 40. |
What do you understand by the terms Candidate Key and Cardinality of relation in relational database? |
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Answer» A candidate key is a column (or columns) that uniquely identify rows in a table. Any of the identified candidate keys can be used as the table's primary key. Cardinality of relation represents number of rows (or tuples) in a relation. |
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| 41. |
This chapter has described some of the major advantage of a database system. What are the disadvantage ? |
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Answer» Following are the some of disadvantage of database system : (a) Security may be compromised without good controls. (b) Integrity may be compromised without good controls. (c) Extra hardware may be required. (d) Performance overhead may be significant. (e) System is likely to be complex |
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| 42. |
What is the function of database management system ? |
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Answer» Following are the function of database management system: - To organize information - To store information - To retrieve information As efficiently and effectively as possible |
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| 43. |
Why is ROM considered to be more secure data storage than RAM? |
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Answer» It is non-volatile – does not loose data/instructions when power is cut and the data/instructions are not likely to be overwritten as it is read-only. |
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| 44. |
How do database management system overcome the problems associated with data redundancy ? |
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Answer» Database normalization prevents redundancy and makes the best possible usage of storage .Proper use of foreign keys can minimize data redundancy and chance of destructive anomalies. However, concerns of efficiency and convenience can sometimes result in redundant data design despite the risk of corrupting the data. A solution to the problem is to place the redundant data in a separate table, one in which the data no longer will be redundant. |
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| 45. |
Differentiate RAM and ROM. |
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Answer» The difference between RAM and ROM is given below.
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| 46. |
(a) Which database was created to manage the redundancy in EST data? (b) What is the role of the curator in Bio-informatics. |
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Answer» (a) Unigene (b) The curator reviews and checks newly submitted data to ensure that biological features are adequately described and the conceptual translations of any coding regions obey known rules. |
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| 47. |
What is the space complexity of Depth-first search?(a) O(b)(b) O(bl)(c) O(m)(d) O(bm) |
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Answer» The correct choice is (d) O(bm) Easy explanation: O(bm) is the space complexity where b is the branching factor and m is the maximum depth of the search tree. |
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| 48. |
The time and space complexity of BFS is (For time and space complexity problems consider b as branching factor and d as depth of the search tree.)(a) O(bd+1) and O(bd+1)(b) O(b2) and O(d2)(c) O(d2) and O(b2)(d) O(d2) and O(d2) |
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Answer» The correct answer is (a) O(bd+1) and O(bd+1) Explanation: We consider a hypothetical state space where every state has b successors. The root of the search tree generates b nodes at the first level, each of which generates b more nodes, for a total of b2 at the second level. Each of these generates b more nodes, yielding b3 nodes at the third level, and so on. Now suppose that the solution is at depth d. In the worst case, we would expand all but the last node at level d (since the goal itself is not expanded), generating bd+1- b nodes at level d+1. |
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| 49. |
In the circuit shown the voltage drop across the `15Omega` resistor is `30 V` having the polarity as indicated. The ratio of potential difference across `5Omega` and resistance `R` is |
| Answer» Correct Answer - `00.0` | |
| 50. |
A uniform thin rod of mass `m` and length `R` is placed normally on surface of earth as shown. The mass of earth is `M` and its radius `R`. Then the magnitude of gravitational force exerted by earth on the rod is A. `(GMm)/(4R^(2))`B. `(GMm)/(2R^(2))`C. `(2GMm)/R^(2)`D. `(4 GMm)/R^(2)` |
| Answer» Correct Answer - B | |