CAT Practice Question and Answer

Q: A periscope works by the principle of 2957 0

  • 1
    Total internal reflection
    Correct
    Wrong
  • 2
    Refraction
    Correct
    Wrong
  • 3
    Diffraction
    Correct
    Wrong
  • 4
    Reflection & Refraction
    Correct
    Wrong
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Answer : 1. "Total internal reflection"
Explanation :

Answer: A) Total internal reflection Explanation: A periscope is an optical instrument that uses a system of prisms, lenses, or mirrors to reflect images through a tube.       Light from a distant object strikes the top mirror and is then reflected at an angle of 90 degrees down the periscope tube. At the bottom of the periscope, the light strikes another mirror and is then reflected into the viewer’s eye.   Hence, A periscope works by the principle of Total internal reflection.

Q: If the third day of a month is Tuesday, which of the following would be the 4th day before the 27th day of that month? 2950 1

  • 1
    Tuesday
    Correct
    Wrong
  • 2
    Monday
    Correct
    Wrong
  • 3
    Wednesday
    Correct
    Wrong
  • 4
    Sunday
    Correct
    Wrong
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Answer : 2. "Monday"
Explanation :

Answer: B) Monday Explanation: Dates on which Tuesday fall are 3,10,17, and 24   Hence, the 27th day of the month will be (Tuesday + 3 days=)Friday   Required day of the month = Friday - 4 = Monday

Q: Two goods trains each 520 m long, are running in opposite directions on parallel tracks. Their speeds are 42 km/hr and 36 km/hr respectively. Find the time taken by the slower train to cross the driver of the faster one ? 2942 0

  • 1
    60 sec
    Correct
    Wrong
  • 2
    48 sec
    Correct
    Wrong
  • 3
    45 sec
    Correct
    Wrong
  • 4
    34 sec
    Correct
    Wrong
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Answer : 2. "48 sec"
Explanation :

Answer: B) 48 sec Explanation: Relative speed = 42 + 36 = 78 km/hr = 653 m/s Distance = (520 + 520) =1040 mts. Time = 1040×365= 48 sec

Q: In a certain code DOWN is written as '5@9#' and NAME is written as '#6%3'. How is MODE written in that code ? 2941 0

  • 1
    6@53
    Correct
    Wrong
  • 2
    %@53
    Correct
    Wrong
  • 3
    53%#
    Correct
    Wrong
  • 4
    %#35
    Correct
    Wrong
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Answer : 2. "%@53"
Explanation :

Answer: B) %@53 Explanation: From the given information : D O W N A M E == 5 @ 9 # 6 % 3 MODE = %@53

Q: In a certain code ARCHIVE is written as DSBGFWJ. How is SYSTEMS is written in that code ? 2939 0

  • 1
    TZTSTUN
    Correct
    Wrong
  • 2
    TZTSTNF
    Correct
    Wrong
  • 3
    TZTUTNF
    Correct
    Wrong
  • 4
    TZTNTFS
    Correct
    Wrong
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Answer : 2. "TZTSTNF"
Explanation :

Answer: B) TZTSTNF Explanation: ARC -> CRA ->(+1) DSB    H ->     H ->(-1) GIVE  ->  EVI ->(+1) FWJ  Similarly,  SYS -> SYS ->(+1) TZT    T ->     T ->(-1) SEMS -> SME ->(+1) TNF

Q: Choose the word which gives best meaning to the sentence from the given options. His recent success ______ him more arrogant than what he used to be 2939 0

  • 1
    make
    Correct
    Wrong
  • 2
    have make
    Correct
    Wrong
  • 3
    was making
    Correct
    Wrong
  • 4
    has made
    Correct
    Wrong
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Answer : 4. "has made"
Explanation :

Answer: D) has made Explanation: HIS RECENT SUCCESS HAS MADE HIM MORE ARROGANT THAN WHAT HE USED.

Q: Some mangoes are yellow. Some tixo are mangoes. Conclusions:(i) Some mangoes are green.(ii) Tixo is a yellow. 2933 0

  • 1
    Only conclusion (i) follows
    Correct
    Wrong
  • 2
    Only conclusion (ii) follows
    Correct
    Wrong
  • 3
    Either (i) or (ii) follows
    Correct
    Wrong
  • 4
    Neither (i) nor (ii) follows
    Correct
    Wrong
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Answer : 4. "Neither (i) nor (ii) follows"
Explanation :

Answer: D) Neither (i) nor (ii) follows Explanation:

Q: The ratio of male and female in a city is 7 : 8 respectively and percentage of children among male and female is 25 and 20 respectively. If number of adult females is 156800, what is the total population of the city? 2931 0

  • 1
    4,12,480
    Correct
    Wrong
  • 2
    3,67,500
    Correct
    Wrong
  • 3
    5,44,700
    Correct
    Wrong
  • 4
    2,98,948
    Correct
    Wrong
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Answer : 2. "3,67,500"
Explanation :

Answer: B) 3,67,500 Explanation: Let the total population be 'p' Given ratio of male and female in a city is 7 : 8 In that percentage of children among male and female is 25% and 20% => Adults male and female % = 75% & 80% But given adult females is = 156800 => 80%(8p/15) = 156800 => 80 x 8p/15 x 100 = 156800 => p = 156800 x 15 x 100/80 x 8 => p = 367500 Therefore, the total population of the city = p = 367500

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