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Q:

What are the main advantages and disadvantages of Fiber-Optic-based networks?

Answer

Advantages : More efficient and quality of service is better.

Dis advantages: Expensive, complicated

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Subject: Network Administration

Q:

A man goes down stream with a boat to some destination and returns upstream to his original place in 5 hours. If the speed of the boat in still water and the strean are 10km/hr and 14km/hr respectively, the distance of the destination from the string place is

A) 16 km	B) 18 km
C) 21 km	D) 25 km

Answer & Explanation Answer: C) 21 km

Explanation:

Let the distance covered be D km.

$\frac{D}{10 + 4} + \frac{D}{10 - 4} = 5$

$\frac{D}{14} + \frac{D}{6} = 5$

10D = 42 x 5 = 210

=> D = 21 km

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Filed Under: Boats and Streams
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

Q:

A man takes 6 hours 15 minutes in walking a distance and riding back to the starting place. He could walk both ways in 7 hours 45 minutes. The time taken by him to ride both ways, is

A) 4 hours	B) 4 hours 30 minutes
C) 4 hours 45 minutes	D) 5 hours

Answer & Explanation Answer: C) 4 hours 45 minutes

Explanation:

Time taken in walking both ways = 7 hours 45 minutes --------(i)

Time taken in walking one way and riding back= 6 hours 15 minutes-------(ii)

By equation (ii)*2 -(i), we have

Time taken to man ride both ways, = 12 hours 30 minutes - 7 hours 45 minutes

= 4 hours 45 minutes

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Filed Under: Time and Distance

Q:

Two trains started at the same time, one from A to B and the other from B to A . If they arrived at B and A respectively 4 hours and 9 hours after they passed each other the ratio of the speeds of the two trains was

A) 2:1	B) 3:2
C) 4:3	D) 5:4

Answer & Explanation Answer: B) 3:2

Explanation:

Note : If two trains (or bodies) start at the same time from points A and B towards each other and after crossing they take a and b sec in reaching B and A respectively, then: (A's speed) : (B's speed) = (b : a)

Therefore, Ratio of the speeds of two trains = $\sqrt{9} : \sqrt{4}$ = 3 : 2

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Filed Under: Problems on Trains
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

Q:

Two trains of equal length , running in opposite directions , pass a pole in 18 and 12 seconds. The trains will cross each other in

A) 14.4 sec	B) 15.5 sec
C) 18.8 sec	D) 20.2 sec

Answer & Explanation Answer: A) 14.4 sec

Explanation:

Let the length of the train be L metres

Speed of first train = $\frac{3600}{18} x L$ m/hour

Speed of secxond train = $\frac{3600}{12} x L$ m/hour

When running in opposite directions, relative speed = 200 L + 300 L m/hour

Distance to be covered = L + L = 2L metre

Time taken = $\frac{2 L}{500 L} x 3600$ sec

=14.4 sec

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Filed Under: Problems on Trains
Exam Prep: AIEEE , Bank Exams , CAT
Job Role: Bank Clerk , Bank PO

Q:

The book " Truth, love and A Little Malice " is written by

A) Tarun Tejpal	B) Vikram Seth
C) Khushwant Singh	D) Nirad C. Chaudhuri

Answer & Explanation Answer: C) Khushwant Singh

Explanation:

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Filed Under: Books and Authors

Q:

The enzyme in whosepresence glucose and fructose are converted into alcohol is

A) Diastase	B) Maltase
C) Invertase	D) Zymase

Answer & Explanation Answer: D) Zymase

Explanation:

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Filed Under: Chemistry

Q:

When formaldehyde and potassium hydroxide are heated , we get

A) Acetylene	B) Methyl alcohol
C) Methane	D) Ethyl formate

Answer & Explanation Answer: B) Methyl alcohol

Explanation:

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Filed Under: Chemistry

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