CAT Questions

Q:

Light travels slowest in

A) Glass B) Water
C) Air D) Vacuum
 
Answer & Explanation Answer: A) Glass

Explanation:

Because the refractive index of glass is highest, light travels slowly in Glass. 

We know that the speed of light depends on the refraction index. The higher the index of refraction is, the slower the speed of light is.


R.I of air and vacuum = 0 (air is a teeny bit more but can be taken as 0)
R.I of water = 1.33
R.I of glass = 1.4.

 

Hence, Light travels slowest in Glass.

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7 7067
Q:

Translation of the dna sequence AAGCTGGGA would result in

A) a DNA strand with the base sequence TTCGACCCT B) an mRNA strand with the sequence TTCGACCCT
C) a sequence of three amino acids linked by peptide bonds D) an mRNA strand with the sequence UUGCACCCU
 
Answer & Explanation Answer: A) a DNA strand with the base sequence TTCGACCCT

Explanation:

Translation_of_the_dna_sequence_AAGCTGGGA_would_result_in_a_DNA_strand_with_the_base_sequence_TTCGACCCT1557489837.jpg image

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7 7065
Q:

Who of the following threw a bomb in the Central Legislative Assembly along with Bhagat Singh ?

A) B.K. Dutt B) Sukhdev
C) Jatin Das D) Rajguru
 
Answer & Explanation Answer: A) B.K. Dutt

Explanation:

Bhagat Singh and B.K. Dutt threw bombs in the Legislative Assembly as a protest against "Passage of public Safety bill".

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23 7056
Q:

Quality of transmission depends upon

A) Nature of signal only B) Nature of medium only
C) Both (A) and (B) D) Neither A nor B
 
Answer & Explanation Answer: C) Both (A) and (B)

Explanation:

Quality of transmission is governed both by nature of signal and nature of communication channel/medium.

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18 7040
Q:

In OSI network architecture, the routing is performed by

A) transport layer B) session layer
C) network layer D) data link layer
 
Answer & Explanation Answer: C) network layer

Explanation:

in_osi_network_architecture_the_routing_is_performed_by1553604163.jpg image

 

In networking, the Open Systems Interconnection is commonly called as OSI model. It has a 7 layer architecture for the communication.

 

In OSI network architecture, the routing is performed by network layer which is layer number 3 with the help of intermediate routers.

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4 7035
Q:

The sides of a right-angled triangle are 12 cm, 16 cm, 20 cm respectively. A new right angle Δ is made by joining the midpoints of all the sides. This process continues for infinite then calculate the sum of the areas of all the triangles so made.

A) 312 sq.cm B) 128 sq.cm
C) 412 sq.cm D) 246 sq.cm
 
Answer & Explanation Answer: B) 128 sq.cm

Explanation:

Area =   SSC Quiz : Quantitative Aptitude | 06 - 01 - 18 = 96

 

Sum of Area =  SSC Quiz : Quantitative Aptitude | 06 - 01 - 18

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21 7020
Q:

12 year old Manish is three times as old as his brother Rajeev. How old will Manish be when he is twice as old as Rajeev ?

A) 12 yrs B) 14 yrs
C) 16 yrs D) 18 yrs
 
Answer & Explanation Answer: C) 16 yrs

Explanation:

12 year old Manish is three times as old as his brother Rajeev who must be 4 years old.
Diff in ages = 8 years.
when Rajeev will become 8 years old, Manish will be 16 yrs old and he will be twice as old as Rajeev.

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7 7020
Q:

The difference between a virus and a self-replicating program which is like a virus is that rather than creating copies of itself on only one system it propagate through computer network. What is that called as _____

A) Keylogger B) Worm
C) Time Bomb D) Cracker
 
Answer & Explanation Answer: B) Worm

Explanation:
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16 7020