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# Placement Questions & Answers :: TCS

173.48K

## Total Qs: 647+

Not Attempted

61. How many integers in the given below set do not contain the digit 7. 1000,1001,1002,-------------------------.9998,9999

Answer: Option A

Explanation:

Total number of four digit numbers =9000 (9999 - 999)
Find the numbers not having digit 7 in them.
Now consider the units place it can be selected in 9 ways (i.e 0,1,2,3,4,5,6,8,9)
Tens place it can be selected in 9 ways (i.e 0,1,2,3,4,5,6,8,9)
Hundreds place it can be selected in 9 ways (i.e 0,1,2,3,4,5,6,8,9)
Thousands place can be selected in 8 ways (i.e 1,2,3,4,5,6,8,9) here '0' cannot be taken
Total number of numbers not having digit 7 in it =9 x 9 x 9 x 8 =5832

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Tags: TCS

Not Attempted

62. A watch gains 5 min. every hour. If it has set right at 12 noon. what is the true time when the watch is showing 5 pm,on the same day?

Answer: Option A

Explanation:

65 min of 1st clock = 60 min of correct clock
5 hr of this clock = 60x5/65 of correct clock=60/13
correct time is 60/13 hr after 12 = 4:8/13=4:480/13

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Tags: TCS

Not Attempted

63. A call center agent has a list of 305 phone nos of people in alphabetic order of names (but she does not have any of the names). she needs to quickly contacts deepak sharma to convey a message to him.If each call takes 2 minutes to complete, and every call is answered, what is the minimum amount of time in which she can guarantee to deliver the message to Mr.Sharma.

Answer: Option B

Explanation:

305/2=152
152/2=71
71/2=35
35/2=17
17/2=8
8/2=4
4/2=2
2/2=0
we get 0 after 9 times.
ans=9*2=18

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Tags: TCS

Not Attempted

64. If on an item a company gives 25% discount, they earn 25% profit. If they now give 10% discount then what is the profit percentage.

Answer: Option D

Explanation:

Lets assume the cost = Rs x.
After giving 25% discount it becomes 0.75x
Selling price = 0.75x which gives 25% profit...(1)

Thus, after giving 10% discount it becomes 0.90x
Selling price = 0.90x ......(ii)
From eq. (1) and (2),
0.90x will gives = (25 * 0.90x)/ (0.75x) = 30 % profit.

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Tags: TCS

Not Attempted

65. find the number that can be put in place of the question mark.
1.25,3,7.1,1.50,1,8.1,1.75,-1,?

Answer: Option B

Explanation:

1.25+0.25=1.50+0.25=1.75
3-2=1-2=-1
7.1+1=8.1+1=answer is 9.1

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Tags: TCS

Not Attempted

66. In month of jan 4 thursday and 4 sunday then on 1st jan of that month which willbe the day?

Answer: Option A

Explanation:

Here is no explanation for this answer

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Tags: TCS

Not Attempted

67. The famous church in the city of Kumbakonnam has a big clock tower and is said to be over 300 years old. Every Monday 10.00 A M the clock is set by Antony, doing service in the church. The Clock loses 6 mins every hour. What will be the actual time when the faulty clock shows 3 P.M on Friday?

Answer: Option B

Explanation:

Monday 10am to friday 3pm=101 hours=606 minutes=10 hours 6 minutes delay
So, time at 3 pm = 4:54am

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Tags: TCS

Not Attempted

68. A drawer hold 4 red hates and 4 blue hates. what is the probability of getting exactly 3 hatesv when taking out 4 hates randomly out of the drawerband imediately returining every hate to the drawer before taking out the next?

Answer: Option D

Explanation:

The probability of drawing red or blue is equal.
Probability to draw exactly 3 red hats and 1 blue hat =1/2*1/2*1/2*1/2=1/16
Similarly probability to draw exactly 3 blue hats and 1 red hat =1/2*1/2*1/2*1/2=1/16
Total probability =1/16+1/16=1/8

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Not Attempted

69. Sum of 1(2)+2(2)^2+3(2)^3+.......+100(2)^100

Answer: Option E

Explanation:

Here is no explanation for this answer

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Tags: TCS

Not Attempted

70. Find the number that can be put in place of the question mark.
3 7 14 23 36 49 ? 83 104

Answer: Option B

Explanation:

7-3=4 4*4=16 16-2=14
36-23=13 13*4=52 52-3=49
83-56=27 27*4=108 108-4=104

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Tags: TCS

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