Cisco Technical Questions in Written Test
111 / 123
105 shake hands were exchanged in a meeting, each person shakes hands with every other person only once.How many people were present in the meeting?
A14
B8
C56
D15
Answer: Option D
Explanation:Let n be the number of persons in the party. Number of hands shake = 105; Total number of hands shake is given by nC2.
Now, according to the question,
nC2 = 105;
=> n!/[2!*(n-2)!] = 105;
=> n*(n-1)/2 = 105;
=> n2-n = 210;
=> n2-n-210 = 0;
=> n = 15, -14 (Negative Value);
So, n = 15 i.e. number of persons in the party = 15.
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112 / 123
A does 80% of a work in 20 days. He then calls in B and they together finish the remaining work in 3 days. How long B alone would take to do the whole work?
A23 days
B37 days
C40 days
D\(37 \frac{1}{2}\) days
Answer: Option D
Explanation:Work done by A in 20 days = 80/100 = 8/10 = 4/5
Work done by A in 1 day = (4/5) / 20 = 4/100 = 1/25 --- (1)
Work done by A and B in 3 days = 20/100 = 1/5 (Because remaining 20% is done in 3 days by A and B)
Work done by A and B in 1 day = 1/15 ---(2)
Work done by B in 1 day = 1/15 – 1/25 = 2/75
=> B can complete the work in 75/2 days = 37 (1/2) days
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113 / 123
The captain of a cricket team of 11 members is 26 years old and the wicket keeper is 3 years older. If the ages of these two are excluded, the average age of the remaining players is one year less than the average age of the whole team. What is the average age of the team?
A23 years
B24 years
C25 years
DNone of these
Answer: Option A
Explanation:Let the average age of the whole team by x years.
11x - (26 + 29) = 9(x -1)
11x - 9x = 46
2x = 46
x = 23.
So, average age of the team is 23 years.
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114 / 123
A password consists of two letters of the alphabet followed by three digits chosen from 0 to 9. Repeats are allowed. How many different possible passwords are there?
A492,804
B650,000
C676,000
D1,757,600
Answer: Option C
Explanation:For the first Letter you have 26 possible letters
For the second letter you have 26 possible letters
For the first number you have 10 possible numbers
For the second number you have 10 possible numbers
For the third number you have 10 possible numbers
Times all of the possibilities together to get:
26*26*10*10*10 = 676000
Which means their are 676,000 possible passwords
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115 / 123
What is the volume of hemisphere of radius 5 cm?
A250/3 pi
B500/3 pi
C50/3 pi
D350/3 pi
Answer: Option C
Explanation:Here is no explanation for this answer
ShortCut By :: VikashVolume of a hemisphere= 2/3 *pi* r^3
2/3* pi* 5^3= 250 pi/3
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116 / 123
Two trains with lengths x and y ,and speeds u and v. Approaching each other how much time it takes to takes for faster train to cross other train?
Given: u > v and x > y
A(x + y)/(u - v) sec.
B(x - y)/(u + v) sec.
C(x + y)/(u + v) sec.
DNone of these
Answer: Option C
Explanation:Here is no explanation for this answer
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117 / 123
If 9x-3y=12 and 3x-5y=7 then 6x-2y = ?
A5
B4
C2
D8
Answer: Option D
Explanation:Here is no explanation for this answer
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118 / 123
A train running at the speed of 60 km/hr crosses a pole in 9 seconds. What is the length of the train?
A120 metres
B180 metres
C324 metres
D150 metres
Answer: Option D
Explanation:Length of the train = (Speed x Time) =50/3 x 9 m = 150 m.
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119 / 123
#include<stdio.h>
void main()
{
int i=3;
switch(i)
{
default:printf("zero");
case 1: printf("one");
break;
case 2:printf("two");
break;
case 3: printf("three");
break;
}
}
Azero three
Bthree
Czero one
Dzero
Answer: Option B
Explanation:The default case can be placed anywhere inside the loop. It is executed only when all other cases doesn't match.
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120 / 123
When 2256 is divided by 17 the remainder would be?
A1
B16
C14
D12
ENone of above
Answer: Option E
Explanation:Here is no explanation for this answer
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