Technical Aptitude test (DATA STRUCTURE)

 

DATA STRUCTURES APTITUDE

  A technical aptitude is a battery of tests to assess two important skill clusters: technical skills and quantitative aptitude ability.

• Test duration: 60 minutes

• Test language: English

• Number of questions: 36

• Number of sections: 3

 

 1.What is data structure?

 

 A data structure is a way of organizing data that considers not only the items stored, but also their relationship to each other. Advance knowledge about the relationship between data items allows designing of efficient algorithms for the manipulation of data. 

 

2.List out the areas in which data structures are applied extensively? 

 

•  Compiler Design,

•  Operating System, 

•  Database Management System,

•  Statistical analysis package,

•  Numerical Analysis,

•  Graphics,

•  Artificial Intelligence,

•  Simulation  

 

3.What are the major data structures used in the following areas : RDBMS, Network data model & Hierarchical data model.

 

•  RDBMS – Array (i.e. Array of structures) 

•  Network data model – Graph 

•  Hierarchical data model – Trees

 

 4.If you are using C language to implement the heterogeneous linked list, what pointertype will you use? 

 

The heterogeneous linked list contains different data types in its nodes and we need a link, pointer to connect them. It is not possible to use ordinary pointers for this. So we go for void pointer. Void pointer is capable of storing pointer to any type as it is ageneric pointer type.

 

 5.Minimum number of queues needed to implement the priority queue? 

 

Two. One queue is used for actual storing of data and another for storingpriorities.

 

 6.What is the data structures used to perform recursion?

 

Stack. Because of its LIFO (Last In First Out) property it remembers its ‘caller’ soknows whom to return when the function has to return. Recursion makes use of system stack for storing the return addresses of the function calls. Every recursive function has its equivalent iterative (non-recursive) function.Even when such equivalent iterative procedures are written, explicit stack is to be used. 

 

7.What are the notations used in Evaluation of Arithmetic Expressions using prefix and postfix forms?

 

 Polish and Reverse Polish notations.

 

 8.Convert the expression ((A + B) * C – (D – E) ^ (F + G)) to equivalent Prefix and Postfix notations. 

 

 Prefix Notation: ^ - * +ABC - DE + FG 

 Postfix Notation: AB + C * DE - - FG + ^

 

 9. Sorting is not possible by using which of the following methods? 

 (a) Insertion 

(b) Selection  

(c) Exchange 

(d) Deletion 

(d) Deletion.

 

  Using insertion we can perform insertion sort, using selection we can perform selection sort, using exchange we can perform the bubble sort (and other similar sorting methods). But no sorting method can be done just using deletion.

 

 10.What are the methods available in storing sequential files ?

 

• Straight merging, 

•  Natural merging,

•  Polyphase sort, 

•  Distribution of Initial runs.

 

 

 

 

 

 

 

 

Quantiative Aptitude Questions with Answers

 

  Quantitative Aptitude Questions and Answers contains concepts and test papers on many

 topics such as average, numbers, compound interests, partnership, problem on ages, calendar,

 boats and streams, clock, height and distance, percentage, pipes and cisterns, profit and loss, 

speed, time and distance, simple interest, problem on trains, time and work, etc.

 

 

Average Aptitude

1) What is the average of first five multiples of 12?

 A. 36

 B. 38

C. 40

D. 42

Answers: 36

Explanation:

Average = 12∗(1+2+3+4+5) ∗

= 12 ∗ 15∗

= 12 ∗ 3= 36

Numbers Aptitude

1) What is the difference in the place value of 5 in the numeral 754853?

A. 49500

B. 49950

C. 45000

D. 49940

Answer: 49950

Explanation:

The digit 5 has two place values in the numeral, 5 * 10⁵ = 50,000 and 5 * 10¹ = 50.

∴Required difference = 50000 - 50 = 49950

Compound interest Aptitude

1) What is the compound interest on Rs. 2500 for 2 years at rate of interest 4% per annum?

A. 180

B. 204

C. 210

D. 220

Answer: 204

Explanation: 

Principal (P) = Rs. 2500

Rate of interest(r) = 4%

Time (t) = 2 years

Compound Interest = Amount ? Principal

Amount(A)=P 

 C.I. = 2704 ? 2500 = Rs. 204

 

 

Partnership Aptitude

1) Sohan started a business with a capital of Rs. 80000. After 6 months Mohan joined as a partner by investing Rs. 65000. After one year they earned total profit Rs. 20000. What is share of Sohan in the profit?

A. 5222.2

B. 5777.7

C. 6222.2

D. 6777.7

Answer:  5777.7

Explanation:

Sohan's capital be C1 = 80000

Mohan's capital be C2 = 65000

Sohan's time be T1 = 12 months

Mohan's time be T2 = 6 months

Profit earned = 20000

 Therefore, Profit of Sohan: Profit of Mohan = 32:13

Therefore, Profit of Sohan: Profit of Mohan = 32:13

 

Problem on ages Aptitude

1) A mother is twice as old as her son. If 20 years ago, the age of the mother was 10 times the age of the son, what is the present age of the mother?

A. 38 years

B. 40 years

C. 43 years

D. 45 years

 Answer: 45 years

Explanation:

Let the age of son = X years

∴Age of mother would be =2X

As per question 20 years ago;

10 (X -20) = 2X - 20

10X - 200 = 2X - 20

10X - 2X= - 20 + 200

8X = 180

 ∴Age of mother = 22.5 * 2 = 45 years

 

Calendar Aptitude

1) If January 1, 1996, was Monday, what day of the week was January 1, 1997?

A. Thursday

B. Wednesday 

C. Friday

D. Sunday

Answer:  Wednesday

Explanation:

The year 1996 is divisible by 4, so it is a leap year with 2 odd days.

As per the question, the first day of the year 1996 was Monday, so the first day of the year 1997 must 

be two days after Monday. So, it was Wednesday.

 

 

Boats and Streams Aptitude

1) The speed of a boat in still water is 5km/hr. If the speed of the boat against the stream is 3 km/hr, what is the speed of the stream?

A. 1.5 km/hr

B. 2 km/hr

C.  2.5 km/hr

D.  1 km/hr

 

 

Clocks Aptitude

1) How many times the hands of a clock coincide in a day?

A. 24

B. 22

C. 23

D. 21

 Answer: 22

Explanation :

The hands of a clock coincide only once between 11 O' clock and 1 O' clock, so in every 12 hours, the hands of a clock will coincide for 11 times.

∴ In a day or 24 hours, the hands of a clock will coincide for 22 (11+11) times.

 

Frequently asked aptitude question for interviews

 

Needs For Aptitude Test :

 Aptitude tests are usually administered online – most often after a candidate has made their initial job application – and are used to filter unsuitable applicants out of the selection process, without the need for time-consuming one-to-one job interviews.

1. Today it is Thursday.After 132 days,it will be

 

(a) Monday

(b) Sunday

(c) Wednesday

(d) Thursday

 

Answer: Wednesday

 

Explanation:

Since each day of the week is repeated after 7 days.

After 133 days,it will be thursday.

So one day before that would be Wednesday.

 

2. A train 120 meters long is running with a speed of 60 km/hr. In what time will it pass a boy who is running at 6 km/hr in the direction opposite to that in which the train is going?

(a) 6.54 sec

(b) 44.32 sec

(c) 55 sec

(d) 30.2 sec

 

Answer: 6.54 sec

Explanation:

Speed of train relative to boy= `(60 + 6)` km/hr = 66 km/hr

`= [66 xx 5/18]` m/sec = `[55/3]` m/sec.

Time taken to pass the boy=` [120 xx 3/55]` sec = 6.54 seconds

3. Danny can cover a certain distance in 1 hour 24 minutes by covering two-third of the distance at 6     km/hour and the rest at 7 km/hr. Calculate total distance.

 

(a) 8 km

(b) 9 km

(c) 6 km

(d) 7/5 km

 

Answer: 6 km

 

Explanation: 

 Let the total distance be x , then

[{(2/3) x }/6 ] + [{(1/3) x }/7 ] = 7/5`

=>   x/9 + x/21 = 7/5`

=>   7x = 63`

=>   x = 9`

 Therefore , total distance = `6 km`

 

 

4. Find the H.C.F, if the numbers are in the ratio of 4 : 5 : 6 and their L.C.M. is 2400.

 

(a) 35

(b) 20

(c) 40

(d) 67

 

Answer: 20

 

Explanation: 

Let the numbers be 3x, 4x and 5x.

Then,their L.C.M. = 120x.

So, 120x = 2400 or x = 20.

=>The numbers are (4 x 20), (5 x 20) and (6 x 20).

Hence, required H.C.F = 20.

 

5. What is the value of c , If 8 is 4% of a, and 4 is 8% of b. c equals b/a.

 

(a) 12

(b) 1/4

(c) 0.155

(d) None of these

 Answer: 1/4

Explanation:

Let be the 4% of a is 4a/100.

Since this equals 8, we have 4a/100=8.

Solving for a yields a=8×`(100/4)`=200.

Also, 8% of b equals 8b/100, and this equals 4. 

Hence, we have `(8/100)`×b=4. 

Solving for b yields  b = 50.

Now, c=`b/a`=`50/200`=`1/4.`

 

6. P and Q take part in 100 m race. P runs at 6kmph. P gives Q a start of 8 m and still beats him by 8 seconds. The speed of Q is:

 

(a) 6.14 kmph

(b) 15.2 kmph

(c) 5 kmph

(d) 4.86 kmph

 

Answer: 4.86 kmph

 

Explanation:

 

 speed =( 6**5/18)m/sec) = (30/18) m/sec

Time taken by P to cover 100 m = `(100 ** 18/30)`m/sec =60 sec

Time taken by Q to cover 92 m = (60 + 8) = 68 sec.

Q's speed =`("Distance"/"Time"**18/5) kmph =(92/68 ** 18/5)` kmph = 4.86kmph.

 

 

7. Find the speed of the boat in still water, if a boat covers a certain distance upstream in 2 hours, while it comes back in 1`1/2` hours. If the speed of the stream be 3 kmph.

 

(a) 12 Kmph

(b) 18 Kmph

(c) 21 Kmph

(d) 24 Kmph

 

Answer: 21 Kmph

 

Explanation: 

Let the speed of the boat in still water be x kmph. Then,

Speed downstream = (x + 3) kmph,

Speed upstream = (x - 3)kmph.

`(x - 3) * 2 = (x + 3) * 3/2`

4x - 12 = 3x + 9

x = 21kmph.

 

8. In covering a distance of 40 km, Kamlesh takes 2 hours more than Pankaj. If Kamlesh doubles his speed, then he would take 1 hour less than Pankaj. Then what is Kamlesh's speed?

(a) 11 Kmph

(b) 5 Kmph

(c) 9 Kmph

(d) 6 Kmph

Answer: 5 Kmph

Explanation:

Let Kamlesh’s speed be x km/hr.

Then, `40/x - 40/(2x) = 4`

8x = 40

x = 5 km/hr

Most important aptitude questions

 

An aptitude test is a systematic means of testing a job candidate's abilities to perform 

specific tasks and react to a range of different situations.

The tests each have a standardised method of administration and scoring.

The results are quantified and compared with all other test takers.

No prior knowledge is needed, as the tests measure innate ability at a particular competency.

 

1. For which of the following values of n, is the number16^41 + 2^7925 + 16^n a perfect square ?

(a) 3922

(b) 3921

(c) 3924

(d) 3920

 

Answer : 3921

2. Four dice are thrown simultaneously. Find the number of outcomes in which at least one of the dice 

shows 3 ?

(a) 670

(b) 671

(c) 672

(d) 673

Answer : 671

3. In how many different ways can the letters of the word "DETAIL" be arranged such that the vowels 

must occupy only the odd position ?

(a) 64

(b) 120

(c) 36

(d) None

Answer : 36

4. Find the next term in the series 2, 1, 3, 4, 7, 11, ?

(a) 18

(b) 20

(c) 15

(d) 14

Answer : 18

5. A train runs at a speed of 120 km/hr and takes 6 seconds to cross a bridge. After travelling some 

distance, it takes 3 seconds to pass a man. What is the length of the bridge ?

(a) 120 m

(b) 200 m

(c) 100 m 

(d) 80 m

Answers : 100 m

6. An Arithmetic progression or AP is a sequence where the difference between two successive terms

is always a constant. The sum of 3 consecutive terms of an AP is 27 and the product of these 3 terms 

is 704. The first term of this AP is ? 

(a) 9

(b) 22/3

(c) 23/3

(d) None

Answer : 22/3

7. Three friends divided some bullets equally. After all of them shot 4 bullets the total number of 

remaining bullets is equal to that of one has after division. Find the original number divided ?

(a) 18

(b) 20

(c) 40

(d) 34

 

Answers :  18

8. Three pipes A, B and C can fill a tank from empty to full in 30 minutes, 20 minutes and 10 minutes.

When the tank is empty, all the three pipes are opened. A, B and C discharge chemical solution P, Q

and R. What the proportion of the solution R in the liquid in the tank after 3 minutes ?

(a) 5/11

(b) 6/11

(c) 7/11

(d) 8/11

 

Answer :  6/11

Most important Aptitude Test Questions with Answers

Hi! every one now let's learn aptitude questions with courage.

Cheer up !! yourself and get in to learn aptitude questions.

 

 Now let's see what is an Aptitude Test?

An aptitude test is an exam used to determine an individual's propensity to suceed in a given activity.

Aptitude test assume that individuals have inherit strenghts and weakness, and have a natural inclination

towards success or failure in specific areas based on their innate characteristics. It does not test

knowledge, it is not a test for which a person can study.

ENGLISH APTITUDE TEST

1. Select the best option that fills the blanks to make the sentence complete.

                  Sunaina ______ to play the piano.

(a) want

(b) devoted

(c) decide

(d) wanted

Answer : wanted

2. Select the best option that fills the blanks to make the sentence complete.

             Each _____ Mike _____ the test he failed.

(a) day / watched

(b) time / took 

(c) attempted / took

(d) place / sat

Answer : time / took

3. Which 3 of the 8 letter bits can be combined to create a word reffering to someone being childish

(or) immature?

            RET, JUV, RED, DED, IMM, AR, EN, ILE

Answer : JUVENILE

4. Which 3 of the 8 letter bits can be combined to create a word that describes having powwer and influence over others?

          DO, ANT, FOR, CED, FED, MIN, FLE, CE

Answer : DOMINANT

MATHEMATICAL APTITUDE TEST

5. It takes Marina 1/2 hour to get washed and changed before school. It takes her 1/4 of hour to go 

downstairs and eat breakfast. It takes her 1 and 1/4 hours on the bus to school. How much time

does it take Marina to get ready and get to school?

Answer : 2hours

Explanation : 1/2 hours = 30 min

                        1/4 hours= 15 min

                        1 and 1/4 hour = 1 hour 15 min

6. Choose which pair of numbers comes next ?

           27  25  87  23  21  87  19

Answer : 17, 87

7. Choose which pair of numbers comes next?

         1  3   6   10   15   21    28

Answer : 36, 45

How to Pass Aptitude Test: Questions For You (Part 2)

TODAY'S APTITUDE QUESTIONS WITH ANSWER

1. Which number should come next in the pattern

                      1, 1. 2, 3, 5, 8, 13, ?

Answer : 21

Explanation : There is a pattern to decide the next number of the series. Next number is the addition of                             previous two numbers.

                       Example : 2 = 1 + 1, 5 = 3 + 2, 8 = 5 + 3

                

2. Read the below sentence and give the correct answer

       Book is to read as fork is to_:

 

Answer : Eating 

Explanation : Forks are used during dining and meal consumption.

 

3. A girl starts to run at the speed of 5mph. After a one hour a boy starts to run at 10mph speed from same location and going in the same direction. How long will it take for the boy take to catch up with the girl?

 

Answer : 1 hour

Explanation : Boy has twice of girls speed. Boy will only take half of the time to run same distance

                      compared to the girl.    

                      After an hour girl already has run 5m and she will run another 5m in next hour. 

                      Boy will run 10m in an hour. Girl runs 10m in two hours and boy only take 1hour to

                      run 10m. 

4. Bobby is 6 years old and his sister is a half of his age. When Bobby is 30, what will be the age of his sister?

Answer : 27

Explanation : Sister is 3 when Bobby is 6.

                       Bobby becomes 30 after 24 years.

                       Therefore his sister must be 3 + 24 = 27 years old.

5. Calculate : -100 + 45

Answer : -55 

Explanation : -100 + 45 is equal to 45 - 100

                        Which gives the answer = -55

6. What number is the best match 8:4 as 10:?

                            (a) 20

                            (b) 15

                            (c) 5

                            (d) 10

Answer : 5

Explanation : 4 is half of 8, likewise 5 is half of 10.

7. Find an arrow, which logically belongs in the rectangle with the question mark?

                     

Answer : ➝
Explanation : Each row has three arrows.

                      All three arrows are directed to three directions.

                      According to the pattern, correct answer "A" since the arrow which directed to 

                      right side is missing.

8. What is the number that is one half of quarter of one tenth of 800.

 

Answer : 10

Explanation : To get the answer, need to go reverse.

                       One tenth of 800 is 80. One quarter of 80 is 20. One half of 20 is 10.

                       ∴ Answer is 10.

How to Pass Aptitude Test : Questions For You (Part 1)

Hi! now lets see the types of apptitude testing tested by the Top companies in and around the world

 TYPES OF APTITUDE TESTS

• Numerical Reasoning Test
• Logical Reasoning Test
• Math Reasoning Test
• Diagraming Reasoning Test
• Situational Judgement Test
• Verbal Reasoning Test
• Abstract Reasoning Test

 

 1.How many squares are in this picture?

 

 

Answer : 30

Explanation : There are 16 small squares. 9 squares which could be created using 4 small                         squares 4 squares which can be created using 9 small squares and 1 big square.

Number of squares = 16 + 9 + 4 + 1 = 30

 

2.Which one of the four is least like the other three?

                       (a) Tiger

                       (b) Cow

                       (c) Rabbit

                       (d) Deer

 

Answer : Tiger

Explanation :  All of these animals are mammals.

                      All three animal Cow, Rabbit, Deer are herbivores except Tiger

                      Tiger is also a predator, unlike the others.

 

3.Find the next number of the below sequence

                      30, 29, 27, 24, 20, 15, _, _?

 

Answer : 9

Explanation : Next number of the sequence is less than current number.

                     29 is one less than 30, 27 is two less than 29, 24 is three less than 27.

                     Final number must be six less than 15. 15-6 = 9.      

 

4. Find the missing value using the pattern given below in the table

                            

 

Answer : 9

Explanation : Each row and each column follows the pattern.

                       1 + 2 = 3

                       2 + 4 = 6

                      The correct answer is C, since 3 + 6 = 9

 

5. If you rearrange the letters "CIFAIPC" you would have the name in below as one-of the option 

                                 Choose one :

 

                                          (a) Country

                                          (b) City 

                                          (c) Ocean 

                                          (d) Riiver

 

Answer : Ocean

Explanation : "CIFAICP" can be rearranged as PACIFIC.

                       PACIFIC is an ocean.

 

6. Which of the following can be arranged in to a 5-letter English word

                Choose one : 

                            (a) F G O A T

                            (b) A P S E H

                            (c) R Y I P O

                            (d) D A E P W

 

Answer : A P S E H

Explanation : If we rearrange the "A P S E H" will get the word SHAPE.

                      But other given options are unlikely to the above given question.   

 

7. Which one of the four is least like the other three

                         

                           (a) Car

                           (b) Bus

                           (c) Bicycle

                           (d) Van

 

Answer : Bicycle

Explanation :  All are vehicles, But three of them need fuel.

                       Bicycle dosen't need fuel.

 

8.The day after the day after tomorrow is four days before Monday. What day is it today?

 

Answer : Monday

Explanation : Just simply calculate you will definitely get the answer.

                      If not please enter in to the comment section given below.