# TCS Placement: Sample Questions 291 - 293 of 502

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## Question 291

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### Write in Short

Short Answer▾

If 20 men take 15 days to complete a job, in how many days can 25 men finish that work?

### Explanation

• More men, less days to complete the work
• Number of men and required days are in inverse proportion.
• If 20 men take 15 days to complete a job, then 25 men can complete the same job in x days, which we need to find.

20 15 = 25 x

x = 4 3

x = 12

• So, 25 men require 12 days to complete the same job.

## Question 292

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Essay▾

What is LRC?

### Explanation

• LRC means Longitudinal or horizontal Redundancy Check- verifies the accuracy of stored and transmitted data using parity bits.
• Applied to a parallel group of bit streams.
• Data to be transmitted is divided into transmission blocks into which additional check data is inserted.
• LRC increases the likelihood of detecting burst errors.
• If two bits in one data units are corrupted and two bits in exactly the same positions in another data unit are also damaged, the LRC checker will not detect an error.

## Question 293

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### Write in Short

Short Answer▾

I don՚t have any brothers and sisters. By pointing a picture that man said that his father is my father՚s son then who is he?

### Explanation

• Man is not having any brothers and sisters.
• By pointing a picture, man said that his father is my father՚s son.
• Father of picture entity is son of man՚s father. As man is the only child of his parents, he is talking about himself.
• So, picture will be of his son.

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