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101 / 164
If a man walks at the rate of 5kmph, he misses a train by only 7min. However if he walks at the rate of 6 kmph he reaches the station 5 minutes before the arrival of the train.Find the distance covered by him to reach the station.
A10 km
B8 km
C6 km
D5 km
Answer: Option C
Explanation:Lets assume the required distance = x km.
Difference in the times taken at two speeds=12mins=1/5 hr.
Therefore (x/5-x/6)=1/5 or (6x-5x) = 6 or x = 6km.
So required distance = 6 km
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102 / 164
Father is aged three times more than his son Mohit. After 8 years, he would be two and a half times of Mohit's age. After further 8 years, how many times would he be of Mohit's age?
A4
B2
C2.5
D3
ENone of these
Answer: Option B
Explanation:Let's assume Monit's present age = X years.
So father's present age = (X + 3X) years = 4X years.
After 8 years.
(4X + 8) =5/2 * (X + 8)
=> 8X + 16 = 5X + 40
=> 3X = 24 so, X=8
Hence, required ratio = (4X + 16) / (X + 16) = 48/24 = 2
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103 / 164
The sum of ages of family members (both children and parents) is 360 years.The total ages of children and parents are in the ratio 2:1 and the ages of wife and husband are in the ratio 5:7.What will be the age of husband?
A65
B75
C72
D70
Answer: Option D
Explanation:Given sum of ages is 360 years.
The ratio of children and parents ages is 2:1.
So total age of parents = 360 x 1 / 3 = 120 years
Given Ratio of wife and husband age is 5:7.
So the age of husband = 120 x 7 / 12 = 70
Hence the age of husband is 70 years.
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104 / 164
A and B together can do a piece of work in 30 days. A having worked for 16 days, B finishes the remaining work alone in 44 days. In how many days shall B finish the whole work alone ?
A30 days
B40 days
C60 days
D70 days
Answer: Option C
Explanation:A's 1 day's work = x
and B's 1 day's work = y
So (A & B) 1 day work = 1/30 => x+y =1/30
=> 30x + 30y = 1 -------- (1)
So 16x + 44y = 1 -------- (2)
By Solving above two equations,
x = 1/60 and y = 1/60
B's 1 day's work = 1/60
Hence, B alone shall finish the whole work in 60 days.
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105 / 164
If A alone can do a piece of work in 8 days and B alone can do the same work in 12 days. How many days A and B required to finish the same work if they work togather?
A24/5 days
B24 days
C5day days
D5/24 days
ENone of these
Answer: Option A
Explanation:A alone one day work = 1/8
B alone one day work = 1/12
Both A and B one day work = (1/8 + 1/12) = (3/24 + 2/24)
= 5/24
so A and B together finish the work in 24/5 day
or 4 4/5 days.
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106 / 164
Dispatcher function is to
Aput tasks in I/O wait
Bschedule tasks in processor
Cchange task priorities
DAll of Above
Answer: Option A
Explanation:Here is no explanation for this answer
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107 / 164
Root directory of a disk should be placed
Aat the fixed address in the main memory
Bat a fixed location on the disk
Cat the fixed location on system disk
Danywhere on the disk
Answer: Option B
Explanation:Here is no explanation for this answer
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108 / 164
The contents of a file will be lost if it is opened in
Aa mode
Bw+ mode
Ca+ mode
Dr mode
Answer: Option B
Explanation:Here is no explanation for this answer
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109 / 164
Which of the following statement is incorrect?
AVolatile storage refers to main and cache memory and is usually fast.
BVolatile storage can survive system crashes or system power down.
CDisk and tapes (non volatile storage) can survive system crashes or system power down.
DStable storage (disk) refers to storage that technically can never be lost as there are redundant backup copies of data.
Answer: Option B
Explanation:Here is no explanation for this answer
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110 / 164
Which is not a memory management scheme?
Abuddy system
Bswapping
Cmonitors
Dpaging
Answer: Option C
Explanation:Here is no explanation for this answer
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