CDAC C-CAT Memory Based previous year Questions
Pipes and Cisterns
Q1. Three pipes are connected to a tank. Pipe A can fill it in 5 hours, Pipe B in 6 hours, and Pipe C can drain it in 10 hours. If all are opened together, how long will it take to fill the tank?
A) 2 hours
B) 3 hours
C) 4 hours
D) 5 hours
Answer: B) 3 hours
Explanation:
Pipe A rate = 1/5
Pipe B rate = 1/6
Pipe C rate = -1/10
Net rate = 1/5 + 1/6 − 1/10 = 16/60
Time = 60/16 = 3.75 hours ≈ 3 hours.
Q2. A pipe fills a tank in 6 hours and another fills it in 3 hours. How long will both take together?
A) 2 hours
B) 1.5 hours
C) 4 hours
D) 3 hours
Answer: B) 1.5 hours
Explanation:
Combined rate = 1/6 + 1/3 = 1/2
Time = 2 hours.
Q3. A pipe can fill a tank in 5 hours and another in 10 hours. Both opened together will fill the tank in?
A) 3.33 hours
B) 5 hours
C) 6.66 hours
D) 7.5 hours
Answer: A) 3.33 hours
Explanation:
Combined rate = 1/5 + 1/10 = 3/10
Time = 10/3 = 3.33 hours.
Time and Work
Q4. A and B finish a work together in 12 days. A alone takes 30 days. How many days will B take alone?
A) 18
B) 20
C) 25
D) 15
Answer: B) 20 days
Explanation:
B’s rate = 1/12 − 1/30 = 1/20
Therefore, B alone takes 20 days.
Q5. A and B together do a work in 10 days. B alone takes 15 days. A alone can finish it in?
A) 15 days
B) 20 days
C) 30 days
D) 25 days
Answer: C) 30 days
Explanation:
A’s rate = 1/10 − 1/15 = 1/30
Therefore, A alone takes 30 days.
HCF and LCM
Q6. Find the HCF of 24 and 36.
A) 6
B) 8
C) 12
D) 18
Answer: C) 12
Q7. Find the LCM of 8 and 12.
A) 16
B) 24
C) 36
D) 48
Answer: B) 24
Q8. Find the LCM of 9, 12 and 15.
A) 60
B) 120
C) 150
D) 180
Answer: D) 180
Ratio and Proportion
Q9. If the ratio of boys to girls is 2:3 and there are 20 boys, how many girls are there?
A) 20
B) 25
C) 30
D) 40
Answer: C) 30
Explanation:
2 parts = 20
1 part = 10
3 parts = 30
Q10. Which ratio is equivalent to 2:3?
A) 6:9
B) 4:5
C) 3:2
D) 9:6
Answer: A) 6:9
Percentages
Q11. What is 20% of 250?
A) 25
B) 40
C) 50
D) 60
Answer: C) 50
Q12. What is 20% of 150?
A) 25
B) 30
C) 35
D) 40
Answer: B) 30
Profit and Loss
Q13. Cost Price = ₹200, Selling Price = ₹250. What is the profit percentage?
A) 10%
B) 20%
C) 25%
D) 50%
Answer: C) 25%
Q14. Cost Price = ₹200, Selling Price = ₹250. Find the profit.
A) ₹25
B) ₹30
C) ₹50
D) ₹20
Answer: C) ₹50
Simple Interest
Q15. Simple interest on ₹1000 for 2 years is ₹200. Find the rate of interest.
A) 5%
B) 10%
C) 15%
D) 20%
Answer: B) 10%
Q16. Find the simple interest on ₹1000 at 10% per annum for 2 years.
A) ₹200
B) ₹100
C) ₹150
D) ₹250
Answer: A) ₹200
Q17. An amount becomes ₹1440 from ₹1200 in 4 years at simple interest. If the new rate is 6%, what will be the new amount?
A) ₹1488
B) ₹1500
C) ₹1520
D) ₹1560
Answer: A) ₹1488
Calendar
Q18. If March 6, 2006 was Monday, what day was March 6, 2005?
A) Sunday
B) Saturday
C) Tuesday
D) Monday
Answer: A) Sunday
Explanation:
2005 was not a leap year. Moving one year backward shifts the day by one day. Therefore, Monday becomes Sunday.
Q19. If May 15, 2005 was Monday, what day was May 15, 2004?
A) Sunday
B) Saturday
C) Tuesday
D) Monday
Answer: B) Saturday
Explanation:
2004 was a leap year, causing an additional day shift. Hence Monday shifts back by two days to Saturday.
Q20. If 5th March 2006 was Sunday, what was 5th March 2005?
A) Friday
B) Saturday
C) Monday
D) Sunday
Answer: B) Saturday
Q21. Find the odd one out.
1, 2, 8, 27, 64, 81, 125
A) 27
B) 64
C) 81
D) 125
Answer: C) 81
Explanation:
The sequence consists mostly of cubes:
1 = 1³
8 = 2³
27 = 3³
64 = 4³
125 = 5³
81 = 9², which does not follow the cube pattern.
Trains
Q22. A train passes a man standing on a platform in 10 seconds. The speed of the train is 54 km/hr. Find the length of the train.
A) 100 m
B) 120 m
C) 150 m
D) 180 m
Answer: C) 150 m
Explanation:
54 km/hr = 15 m/s
Distance = Speed × Time
= 15 × 10
= 150 metres
Q23. A goods train leaves at 10 AM. An express train leaves at 4 PM with a speed of 90 km/hr and catches the goods train in 4 hours. Find the speed of the goods train.
A) 30 km/hr
B) 36 km/hr
C) 40 km/hr
D) 45 km/hr
Answer: B) 36 km/hr
Explanation:
Goods train gets a 6-hour head start.
Distance covered by goods train = 6G
When express catches it:
6G + 4G = 90 × 4
10G = 360
G = 36 km/hr
Boats and Streams
Q24. Speed of boat = 4 km/hr and speed of stream = 5 km/hr. Find the time required to travel 270 km downstream.
A) 30 hours
B) 27 hours
C) 20 hours
D) 18 hours
Answer: A) 30 hours
Explanation:
Downstream speed = 4 + 5 = 9 km/hr
Time = Distance ÷ Speed
= 270 ÷ 9
= 30 hours
Q25. The speed of a boat in still water is 15 km/hr and the rate of current is 3 km/hr. What is the distance travelled downstream in 12 minutes?
A) 3.2 km
B) 3.4 km
C) 3.6 km
D) 3.8 km
Answer: C) 3.6 km
Explanation:
Downstream speed = 15 + 3 = 18 km/hr
12 minutes = 0.2 hours
Distance = 18 × 0.2
= 3.6 km
Mixture and Alligation
Q26. A 60-litre mixture contains milk and water in the ratio 2:1. How much milk should be added to make the ratio 1:2?
A) 30 L
B) 45 L
C) 60 L
D) 90 L
Answer: C) 60 L
Q27. A 60 ml mixture contains milk and water in the ratio 2:1. How much water should be added to make the ratio 1:2?
A) 60 ml
B) 90 ml
C) 80 ml
D) 120 ml
Answer: A) 60 ml
Clocks
Q28. How many times in a day do the hands of a clock form a straight line (180°)?
A) 22
B) 24
C) 44
D) 48
Answer: C) 44
Explanation:
The clock hands form a straight angle 22 times in 12 hours.
Therefore:
22 × 2 = 44 times in 24 hours.
Q29. How many times in a day do the hands of a clock overlap?
A) 22
B) 24
C) 12
D) 11
Answer: A) 22
Explanation:
The hands overlap 11 times in 12 hours.
Therefore:
11 × 2 = 22 times in a day.
Series
Q30. Find the missing number.
2, 5, 12.5, ?, 78.125, 195.3125
A) 25
B) 31.25
C) 32.5
D) 35
Answer: B) 31.25
Explanation:
Each number is multiplied by 2.5
2 × 2.5 = 5
5 × 2.5 = 12.5
12.5 × 2.5 = 31.25
Q31. How many prime numbers are there between 100 and 200?
A) 25
B) 21
C) 16
D) 11
Answer: B) 21
Logical Reasoning
Analogy
Q32. Paint : Painter :: Hammer : ?
A) Wall
B) Wood
C) Carpenter
D) Tool
Answer: C) Carpenter
Explanation:
A painter uses paint. Similarly, a carpenter uses a hammer.
Q33. Small Object : Microscope :: Telescope : ?
A) Sun
B) Planet
C) Distant Objects
D) Satellite
Answer: C) Distant Objects
Explanation:
A microscope is used to observe small objects, while a telescope is used to observe distant objects.
Q34. If CAT = 24, then DOG = ?
A) 26
B) 28
C) 31
D) 34
Answer: A) 26
Explanation:
C = 3
A = 1
T = 20
CAT = 24
Similarly,
D = 4
O = 15
G = 7
DOG = 26
Q35. What is the angle between the hour hand and minute hand at 3:00?
A) 60°
B) 90°
C) 45°
D) 30°
Answer: B) 90°
Explanation:
At 3:00, the minute hand points at 12 and the hour hand points at 3.
Angle = 90°.
Blood Relations
Q36. A is the mother of B, and B is the sister of C. How is A related to C?
A) Aunt
B) Mother
C) Grandmother
D) Sister
Answer: B) Mother
Explanation:
A is the mother of B. Since B and C are siblings, A is also the mother of C.
Coding-Decoding
Q37. If “NQAGHBC” is coded as “PZFGABM”, then how will “HJYFCG” be coded?
A) JZKGBI
B) LZKGBM
C) JZKGBM
D) JZKGBN
Answer: C) JZKGBM
Explanation:
Applying the same letter shifting pattern used in the first code results in JZKGBM.
Blood Relation
Q38. Pointing to a person, Deepak said, “His only brother is the father of my daughter’s father.” How is the person related to Deepak?
A) Uncle
B) Father
C) Brother
D) Cousin
Answer: C) Brother
Explanation:
“My daughter’s father” refers to Deepak himself.
Therefore:
“His only brother is Deepak.”
Hence, the person is Deepak’s brother.
Computer Fundamentals
Q39. What is the full form of CPU?
A) Central Processing Unit
B) Computer Processing Unit
C) Central Programming Unit
D) Control Processing Unit
Answer: A) Central Processing Unit
Q40. What is the full form of RAM?
A) Random Access Memory
B) Read Access Memory
C) Run Access Memory
D) Random Application Memory
Answer: A) Random Access Memory
Q41. Which part of the computer performs arithmetic and logical operations?
A) RAM
B) ALU
C) ROM
D) CU
Answer: B) ALU
Explanation:
ALU stands for Arithmetic Logic Unit and performs all arithmetic and logical operations.
Q42. Which one of the following is a volatile memory?
A) RAM
B) ROM
C) HDD
D) SSD
Answer: A) RAM
Q43. Which type of memory is permanent and non-volatile?
A) RAM
B) ROM
C) Cache
D) Register
Answer: B) ROM
Q44. Which of the following is NOT an input device?
A) Keyboard
B) Mouse
C) Scanner
D) Printer
Answer: D) Printer
Q45. Which of the following is an output device?
A) Mouse
B) Keyboard
C) Scanner
D) Printer
Answer: D) Printer
Q46. Which programming language is called the “Mother of All Languages”?
A) C
B) Python
C) Java
D) Assembly
Answer: A) C
Computer Fundamentals
Q47. Which of the following is NOT an Operating System?
A) Windows
B) Linux
C) Oracle
D) macOS
Answer: C) Oracle
Explanation:
Oracle is a database management system.
Q48. Which of the following is NOT an Operating System?
A) Linux
B) MS Word
C) Windows
D) macOS
Answer: B) MS Word
Q49. Which of the following is an example of system software?
A) MS Word
B) Windows 10
C) Photoshop
D) Chrome
Answer: B) Windows 10
Q50. Which of the following is an example of system software?
A) Photoshop
B) MS Office
C) Windows
D) VLC Media Player
Answer: C) Windows
Q51. Which one is NOT an input device?
A) Scanner
B) Joystick
C) Monitor
D) Keyboard
Answer: C) Monitor
Q52. Which of the following is a non-volatile memory?
A) RAM
B) ROM
C) Cache
D) Register
Answer: B) ROM
Q53. Which language is often referred to as the “mother of all programming languages”?
A) C
B) Java
C) Assembly
D) Fortran
Answer: D) Fortran
Q54. In which generation of computers were Integrated Circuit (IC) chips first used?
A) First Generation
B) Second Generation
C) Third Generation
D) Fourth Generation
Answer: C) Third Generation
Explanation:
IC chips were introduced during the third generation of computers.
English Language
Q55. Which of the following is an antonym of “Emirate”?
A) Kingdom
B) Republic
C) State
D) Province
Answer: B) Republic
Q56. Choose the correct synonym for “Emirate”.
A) Republic
B) Kingdom
C) Democracy
D) Province
Answer: B) Kingdom
Q57. Choose the correct antonym for “Expand”.
A) Contract
B) Extend
C) Increase
D) Enlarge
Answer: A) Contract
Q58. Choose the correct idiom for “Very Easy”.
A) Piece of Cake
B) Break a Leg
C) Hit the Sack
D) Under the Weather
Answer: A) Piece of Cake
Q59. Choose the correct synonym for “Rapid”.
A) Slow
B) Quick
C) Steady
D) Calm
Answer: B) Quick
Q60. Paint : Painter :: Hammer : ?
A) Wall
B) Wood
C) Carpenter
D) Worker
Answer: C) Carpenter
Q61. Small Object : Microscope :: Telescope : ?
A) Planet
B) Sun
C) Distant Objects
D) Eye
Answer: C) Distant Objects
Q62. What does the idiom “Paint the Town Red” mean?
A) Destroy the Town
B) Decorate the Town
C) Celebrate Wildly
D) Get Angry
Answer: C) Celebrate Wildly
Q63. What is the antonym of “Permanent”?
A) Fixed
B) Temporary
C) Constant
D) Durable
Answer: B) Temporary
Q64. What is the antonym of “Generous”?
A) Selfish
B) Kind
C) Giving
D) Helpful
Answer: A) Selfish
Q65. What is the synonym of “Brief”?
A) Long
B) Temporary
C) Concise
D) Hard
Answer: C) Concise
Q66. What does the idiom “To Smell a Rat” mean?
A) Something Smells Bad
B) Suspect Something Wrong
C) Become Angry
D) Run Fast
Answer: B) Suspect Something Wrong
Q67. What does the idiom “Man of Straw” mean?
A) Brave Man
B) Rich Person
C) Weak Person
D) Honest Person
Answer: C) Weak Person
Q68. What is the antonym of “Haughty”?
A) Proud
B) Arrogant
C) Humble
D) Rude
Answer: C) Humble
Explanation:
“Haughty” means arrogant or excessively proud. Its opposite is humble.
Q69. What is the synonym of “Defer”?
A) Reject
B) Refuse
C) Postpone
D) Cancel
Answer: C) Postpone
Explanation:
Defer means to delay or postpone something until a later time.
Q70. What is the synonym of “Nostalgic”?
A) Excited
B) Homesick
C) Angry
D) Curious
Answer: B) Homesick
Explanation:
Nostalgic refers to longing for the past or feeling homesick.
Q71. Reptile : Lizard :: Flower : ?
A) Leaf
B) Daisy
C) Petal
D) Tree
Answer: B) Daisy
Explanation:
A lizard is a type of reptile, and a daisy is a type of flower.
Q72. Telescope is to Planet as Microscope is to ?
A) Cell
B) Star
C) Satellite
D) Atom
Answer: A) Cell
Explanation:
A telescope is used to observe distant planets, while a microscope is used to observe tiny cells.
Q73. What does the idiom “To Cry Wolf” mean?
A) To be Brave
B) To Give a False Alarm
C) To be Silent
D) To be Alert
Answer: B) To Give a False Alarm
Explanation:
The idiom means warning others about danger when no danger actually exists.
Q74. Painter is to Brush as Blacksmith is to ?
A) Hammer
B) Razor
C) Labour
D) Bowl
Answer: A) Hammer
Explanation:
A painter uses a brush, and a blacksmith uses a hammer.
Q75. Brush is to Painting as _____ is to Sculpture.
A) Pencil
B) Ink
C) Spatula
D) Palette
Answer: C) Spatula
Explanation:
A brush is a tool used for painting, while a spatula is commonly used in sculpting.
Syllogism
Q76. Study the following statements and answer the question.
Statements:
Some doctors are knowledgeable.
All knowledgeable people are researchers.
Conclusion:
a) Some researchers are doctors.
A) Only conclusion (a) follows
B) Only conclusion (b) follows
C) Both follow
D) None follow
Answer: A) Only conclusion (a) follows
Explanation:
Some doctors are knowledgeable, and all knowledgeable people are researchers. Therefore, some doctors are researchers.
Reading Comprehension
Passage: History of the Kingdom of Spain
Read the following passage carefully and answer the questions that follow.
The Kingdom of Spain was created in 1492 through the unification of the Kingdom of Castile and the Kingdom of Aragon. For nearly three centuries, Spain emerged as one of the most powerful colonial empires in the world. During the sixteenth and much of the seventeenth century, it dominated Europe politically and economically.
Spain established a vast overseas empire extending from California to Patagonia and also possessed colonies in the Pacific region. However, continuous European wars weakened the nation economically. The decline became more visible under the Habsburg rulers and eventually culminated in the War of the Spanish Succession.
In the eighteenth century, the Bourbon dynasty attempted several reforms and institutional improvements. Their efforts reached a peak during Spain’s involvement in the American War of Independence.
The French Revolutionary and Napoleonic Wars created major political turmoil. France occupied Spain, which eventually led to a successful but destructive war of independence. This period also accelerated the independence of many Spanish colonies in the Americas.
In the twentieth century, Spain faced political instability and a civil war beginning in 1936. The conflict ended with Francisco Franco establishing a nationalist dictatorship that lasted until 1975.
Q77. Which of the following is the closest synonym of the word “Nostalgia”?
A) Ambition
B) Homesickness
C) Curiosity
D) Excitement
Answer: B) Homesickness
Explanation:
Nostalgia refers to sentimental longing for the past and is closely related to homesickness.
Q78. What was the result of the Napoleonic Wars according to the passage?
A) A small part of Europe was occupied by France
B) Spain was occupied by the French
C) The war of independence failed completely
D) American colonies were destroyed after the war
Answer: B) Spain was occupied by the French
Explanation:
The passage clearly states that French occupation extended into Spain during the Napoleonic Wars.
Q79. What is the meaning of the word “Culminated”?
A) Follow a Particular Path
B) Guide or Transform
C) Reach the Highest Point
D) Introduce on a Grand Scale
Answer: C) Reach the Highest Point
Explanation:
“Culminated” means reaching the peak, climax, or final stage of a process.
Q80. Which of the following best summarizes the passage?
A) The Rise and Fall of a National Empire
B) The Downfall of Successive Regimes in Spain
C) The History of Spain
D) Spain in the Eighteenth Century
Answer: C) The History of Spain
Explanation:
The passage discusses the formation, rise, colonial expansion, decline, reforms, wars, civil war, and dictatorship of Spain, making “The History of Spain” the most suitable summary.