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This page contains the most recently asked technical questions and answers in the OCCL.

All of the questions listed below were collected by students recently placed at OCCL.

**Ques:- The sum of the first four primes is**

**Ques:- Find (7x + 4y ) / (x-2y) if x/2y = 3/2 ?**

**Recent Answer**: :

x/2y=3/2…

therefore

2x=6y

x=3y

therefor

=21y+4y/3y-2y

=25y/y

=25..

there answer=25

so for the above question, we don’t have an option…so answer

is Data Insufficient..

**Ques:- Past achievement, role in industry, reason of leaving.**

**Ques:- Which date is comfortable for you to join with us ?**

**Ques:- There are 100 people in an organization. If 46 people can speak English, 46 Spanish, 58 French, 16 can speak both English and Spanish, 24 can speak both Spanish and French, 26 both English and French and 7 can speak all the languages.How many are there who cannot speak any of the three languages.**

**Ques:- If you'll be given a super power what it would be? and why?**

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**Ques:- What r u neet first family money carier? and why ?**

**Ques:- In the Tour de France, what is the position of a rider, after he passes the second placed rider?**

**Recent Answer**: :

Second

**Ques:- When interviewer prove u are good manager what is the right answer for candidate?**

**Ques:- Who became the ninth Indian to claim 150 or more wickets ?**

**Ques:- What kind of person you are?**

**Ques:- Candidate personal profile**

**Ques:- OSI layers model and function of each layer?**

**Ques:- Your total experience?**

**Ques:- Why you left your previous company?**

**Ques:- A man rows to a place 48 km distant and come back in 14 hours. He finds that he can row 4 km with the stream in the same time as 3 km against the stream. The rate of the stream is:**

**Recent Answer**: :

Hint: Assume that the speed of the stream is x and the speed of the boat in still water is x. From the statement of the question form two equations in two variables x and y. This system is reducible to linear equations in two variables. Reduce the system to a system of linear equations in two variables by proper substitutions. Solve the system of equations using any one of the methods like Substitution method, elimination method, graphical method or using matrices. Hence find the value of x satisfying both the equation. The value of x will be the speed of the stream.

Complete step-by-step answer:

Let the speed of the stream be x, and the speed of the boat in still water be y.

We have the speed of the boat upstream = y-x.

Speed of the boat downstream = y+ x.

Now since it takes 14 hours to reach a place at a distance of 48 km and come back, we have the sum of the times taken to reach the place downstream and time taken to return back upstream is equal to 14.

Now, we know that time =Distance speed

Using, we get

Time taken to reach the place =48y+x and the time taken to return back =48y−x.

Hence, we have

48y+x+48y−x=14

Dividing both sides by 2, we get

24y+x+24y−x=7 —–(i)

Also, the time taken to cover 4km downstream is equal to the time taken to cover 3km upstream.

Hence, we have 4y+x=3y−x

Transposing the term on RHS to LHS, we get

4y+x−3y−x=0 ——– (ii)

Put 1y+x=t and 1y−x=u, we have

24t+24u=7 ——-(iii)4t−3u=0 ——–(iv)

Multiplying equation (iv) by 6 and subtracting from equation (iii), we get

24t−24t+24u+18u=7⇒42u=7

Dividing both sides by 42, we get

u=742=16

Substituting the value of u in equation (iv), we get

4t−3(16)=0⇒4t−12=0

Adding 12 on both sides, we get

4t=12

Dividing both sides by 4, we get

t=18

Reverting to original variables, we have

1y+x=18 and 1y−x=16

Taking reciprocals on both sides in both equations, we have

y+ x=8 ——- (v)y−x=6 ——–(vi)

Adding equation (v) and equation (vi), we get

2y=14

Dividing both sides by 2, we get

y=7.

Substituting the value of y in equation (v), we get

7+x=8

Subtracting 7 from both sides we get

x = 8-7 =1

Hence the speed of the stream is 1 km/hr.

**Ques:- What is the average of first five prime numbers greater than 20 ?**

**Ques:- Krishan and Nandan jointly started a business. Krishan invested three times as Nandan did and invested his money for double time as compared to Nandan. Nandan earned Rs. 4000. If the gain is proportional to the money invested and the time for which the money is invested then the total gain was?**

**Recent Answer**: :

Smart Question. What was the total gain by both of them, not Just Krishan

**Ques:- If 12 men do a work in 80 days, in how many days will 16 men do it?**

**Ques:- If 3 workers collect 48 kg of cotton in 4 days, how many kg of cotton will 9 workers collect in 2 days?**

**Recent Answer**: :

72

Recent Answer: Added by Anjum Parveen On 2022-03-09 16:31:39:the sum of first 4 primes numbers =2+3+5+7 =>17