Monday 29 April 2013

Polaris Placement Paper II

The test was for one hr.– 40 technical questions (electrical) for 1/2 hr. and 30 aptitude questions (1/2 hr.)

Technical questions:

What is motor is used in ceiling fan & washing m/cs
In electric traction
what is 8255
8085 has ___ address and ___ data lines
8051 is a ____ bit microcontroller (ans:8 bit)
74LS244 is _____
Bucholz relay is used for _____ protection (transformer)
Transmission line parameters are called ____
No. of poles and freq given find speed

In which motor starting torque can be increase by adding rotor resistance (IM) there were 4 questions form Power plants (had to guess in that) 4 questions from Controls (pretty easy…..like zetaL)
1 means a) under damped b) un damped c) over damped  d)critically damped
questions abort transistor. basic working
Boolean expression was given for simplification-simple
How many flags does 8085 have? (ans: 5)
which of the following are universal gates? (ans : nand, nor)
what’s the frequency range of mobile communication?
The resolution of picture in TV depends on..
a. no: of lines scanned b. video detector o/p and 2 more choices were given…
Question on stability of FET
What is the modulation used to transmit sound in TV signal
a. VSB b. FM and 2 more choices were there…
What is double integration of a unit step signal?
a. ramp signal
b. parabola
It mainly covers Operating system. consists of questions in semaphore( 2 questions), job scheduling algorithms (shortest job), paging (2 or 3 questions), virtual memory, hashing, etc virtual memory is used for…………
RDBMS covers “Define Query” (simple but 4 options made some complications)

Data structure : order of randomly searched binary tree
Electronics based questions which covers microprocessor 80386(not 8085) 2or 3 questions
A pulse is passed through a pipe. to detect any damage. this process is called ……….
a. Time reflectometry
b. Piggy backing

Aptitude
25. Given a 3×3 matrix, find the minor of one of the elements
26. find the odd one out of the series 48 47 44 40 32 23 12
27. A goes to school at 4 kmph and reaches 10 mins b4 schedule and at  3 kmph reaches 10 mins after schedule find the dist (ans: 4 km)
28. Meaning of COY
29. Opposite of Grimace
30. Opposite of FLOODED WITH
31. JUMBLED letters find out the word, the word was FATIGUE
32. Simple interest problem
33. Smallest of four given fractions
34. A guy walks @ 4kmph from a point. After 4hrs a cyclist starts from the same point @ 10kmph….At what distance will they meet from the starting point? the qn was almost like this.
35. x% of people have tea, y% have coffee, z no: of people have both…find the total no: of people… soln: easy. have to use n(AUB)=n(A)+n(B)-n(A intersect B)..
36. Complete the series…. 1,4 ,9,25,… (choices- 47,49,64,none)
37. Analytical question
“failures are stepping stones to success” this means…
a. all success are preceded by failures
b. success consists of failures
c. future can lead to success
d. none..
38. about matrices.. which of the following don’t have inverse? u have to find for which matrix |A|=0…time consuming…
39. There was 1 big square which had 16 squares in it..4 in a row & column.. each square had a no: in it.. except one square.. . had 2 find the missing no:…i don’t remember the no’s…
40. 4 sentences given..& 4 choices of word given…have to choose 1 word that suits all the 4 sentences… *the police are ___ about the missing boy in the forest. * the detective was ___ her face for marks. and 2 more sentences were there… choices (investigating, searching….).ans: investigating.
41. Hcf of 2 no’s…1024 & 1214…don remember no’s exactly. like in RS Aggarwal…
42. out of 500 students,75% of boys and 72% of girls passed. Total pass percentage is 77%.How much girls …?
43. how many prime numbers are between 1 to 100?
44. A greater than B and B less than C. what is the relation between A and C ?
45. given a set of different sentences …we have to choose an appropriate word which should be matching with all sentences
e.g.: A person ————–the child
The government—————the people options may be 1)saved 2)preserve (this is not the exact question)

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