TCS aptitude questions please help PLZZZ

[theo]

1. What is the largest prime number that can be stored in an 8-bit

2. Base of 1234 which is 194 in decimal.


3. The size of a program is N. And the memory occupied by the program is given by M = square root of 4000N. If the size of the program is increased by 1% then how much memory now occupied? http://www.*************

4. In calcutta, temperature at noon varies according to t^2/6 + 12t + 12, where t is elapsed time from noon.Find how much temperature more or less in 3pm to 6pm.


5. A 2D array is declared as A[9,7] and column wise each element requires 8 byte. If A[ 1,1 ] is stored in 1200. Find the memory of A[8,5] ?


6. find the result of the following expression if , M denotes modules operation, R denotes round-off, T denotes truncations M(363,5)+R(5.8) +T(7,7)-R(3.8)



7. Find the value of <@<4-<@4, where < denotes "square" and @ denotes "change in sign".


8. My flight takes of at 2am from a place at 18N 45E and landed 9 Hrs later at a place with coordinates 36N45W. What is the local time when my plane landed. Chet anaS

9. A power unit is there by the bank of the river of 900 meters width. A cable is made from power unit to Power a plant opposite to that of the river and 3000mts away from the power unit. The cost of the cable below water is Rs. 5/- per meter and cost of cable on the bank is Rs.2/- per meter. Find the length where the cable is to be cut. ANS: 2100m


10. Which of the following set of numbers has the highest Standard deviation?
5,0,5,0,5,0
-5,-5,-5,-5,-5,-5.
5,0,5,0,5,0
-5,5,-5,5,-5,5

11.A Flight takes off at 2 A.M from northeast direction and travels for 11 hours to reach the destination which is in North West direction. Given the latitude and longitude of source and destination. Find the local time of destination when the flight reaches there?


Please help as fast as possible

[RisingSun]

1 : Ans : 251

[RisingSun]

3: 0.5 %

[theo]

Is it enough to know the final answer? Is knowing the steps necessary?

[praveena balaram]

Originally Posted by RisingSun

1 : Ans : 251

ans for 1 is 255

[diya_11]

1. What is the largest prime number that can be stored in an 8-bit

Sol)take 2^8=256 da nearest prime no less than it is 251

4. In calcutta, temperature at noon varies according to t^2/6 + 12t + 12, where t is elapsed time from noon.Find how much temperature more or less in 3pm to 6pm.

Sol) Substitute 6 in the eqn:
we get 36/6+12(6)+12 and sub 3 in eqn
we get 9/6+12(3)+12
ans=40.5

5. A 2D array is declared as A[9,7] and column wise each element requires 8 byte. If A[ 1,1 ] is stored in 1200. Find the memory of A[8,5] ?
ans is 1200+(6*8)+(6*7*8)+(5*8)=1524


6. find the result of the following expression if , M denotes modules operation, R denotes round-off, T denotes truncations M(363,5)+R(5.8) +T(7,7)-R(3.8)

ans is (3)+6+7-4=12




8. My flight takes of at 2am from a place at 18N 45E and landed 9 Hrs later at a place with coordinates 36N45W. What is the local time when my plane landed. Chet anaS
Sol)is da ans 5am

10. Which of the following set of numbers has the highest Standard deviation?
5,0,5,0,5,0
-5,-5,-5,-5,-5,-5.
5,0,5,0,5,0
-5,5,-5,5,-5,5
Ans is D coz visualise the points as coordinates then D bit has maximum difference that is 10 and has highest standard deviation. Not sure pls verify
Refer to this link
http://davidmlane.com/hyperstat/A16252.html

[theo]

5. A 2D array is declared as A[9,7] and column wise each element requires 8 byte. If A[ 1,1 ] is stored in 1200. Find the memory of A[8,5] ?
ans is 1200+(6*8)+(6*7*8)+(5*8)=1524

Can you tell me the basis of this calculation? I don't understand.Thanks for the others.

Some more problems I am having problems with :

1.
6.A->11000101
B->00110011
C->00111010
find ((A-C)uB)

Especially please explain the digital calculations detailed.Please.


2.
A family, planning a weekend trip, decides to spend not more than a total of 8 hours driving. By leaving early in the morning, they can average 40 miles per hour on the way to their destination. Due to the heavy Sunday traffic, they can average only 30 miles per hour on the return trip. What is the farthest distance from home they can plan to go?
(a) 120 miles or less (b) Between 120and 140 miles (c) 140 miles


3.
A finishes the work in 10days.B is 60%efficient than A.How many days B takes 2 complete the work.

[jgogineni]

1.251 3.0.5%,10.d,6.12