300 PYQs

QUANTITATIVE APTITUDE

Question 1

If a train travels 120 km in 2 hours, what is its speed?

Speed = Distance/Time = 120/2 = 60 km/h

Question 2

What is 25% of 400?

25% of 400 = (25/100) × 400 = 100

Question 3

If 5x + 3 = 28, then x = ?

5x + 3 = 28 → 5x = 25 → x = 5

Question 4

The average of 5 numbers is 20. If one number is excluded, the average

Becomes 15. What is the excluded number?

Sum of 5 numbers = 5 × 20 = 100. Sum of 4 numbers = 4 × 15 = 60. Excluded

Question 5

A man buys an article for ₹500 and sells it for ₹600. What is his profit

percentage?

Profit = 600 - 500 = 100. Profit% = (100/500) × 100 = 20%

Question 6

Find the next number in the series: 2, 6, 12, 20, ?

Differences: 4, 6, 8, 10. Next difference = 10, so 20 + 10 = 30

Question 7

If the ratio of A:B is 3:4 and B:C is 2:3, what is A:C?

A:B = 3:4, B:C = 2:3. Making B common: A:B:C = 3:4 and 4:6, so A:C = 3:6 = 1:2

Question 8

A pipe can fill a tank in 6 hours. Another pipe can empty it in 8 hours. If

Both are open, how long to fill the tank?

Net filling rate = 1/6 - 1/8 = 1/24 per hour. Time = 24 hours

Question 9

Simple Interest on ₹1000 at 5% per annum for 2 years is?

SI = (P × R × T)/100 = (1000 × 5 × 2)/100 = ₹100

Question 10

If 2^x = 32, then x = ?

2^x = 32 = 2^5, therefore x = 5

COMPUTER FUNDAMENTALS

Question 91

What is the full form of CPU?

CPU stands for Central Processing Unit.

Question 92

Which is a volatile memory?

RAM (Random Access Memory) is volatile and loses data when power is off.

Question 93

What is the smallest unit of data in computer?

Bit (binary digit) is the smallest unit of data, can be 0 or 1.

Question 94

How many bits are in a byte?

A byte consists of 8 bits.

Question 95

Which is an input device?

Keyboard is an input device used to enter data.

Question 96

What does GUI stand for?

GUI stands for Graphical User Interface.

Question 97

Which number system uses base 16?

Hexadecimal uses base 16 (digits 0-9 and A-F).

Question 98

What is firmware?

Firmware is permanent software programmed into read-only memory.

Question 99

Which gate gives output 1 only when all inputs are 1?

AND gate outputs 1 only when all inputs are 1.

Question 100

What is clock speed measured in?

Clock speed is measured in Hertz (cycles per second).

SOFTWARE ENGINEERING

Question 101

Which is NOT a phase of SDLC?

Marketing is not a phase of Software Development Life Cycle.

Question 102

What is waterfall model?

Waterfall is a sequential software development model where phases flow

Question 103

What is unit testing?

Unit testing tests individual components or modules of software.

Question 104

What does UML stand for?

UML stands for Unified Modeling Language.

Question 105

Which is an agile methodology?

Scrum is an agile software development methodology.

Question 106

What is version control?

Version control manages changes to code and tracks different versions.

Question 107

What is regression testing?

Regression testing ensures existing functionality still works after changes.

Question 108

What is a sprint in Agile?

Sprint is a time-boxed iteration (typically 2-4 weeks) in Agile development.

Question 109

What is black box testing?

Black box testing focuses on functionality without knowing internal

Question 110

What is code review?

Code review is systematic examination of code by peers to find defects and

WEB TECHNOLOGIES

Question 111

What does HTML stand for?

HTML stands for Hypertext Markup Language.

Question 112

Which tag is used for largest heading?

<h1> tag creates the largest heading in HTML.

Question 113

What does CSS stand for?

CSS stands for Cascading Style Sheets.

Question 114

Which is a JavaScript framework?

React is a popular JavaScript library/framework for building UIs.

Question 115

What is the purpose of

tag?

<div> tag is a container used to group HTML elements.

Question 116

Which HTTP method is used to send data to server?

POST method is commonly used to send data to server.

Question 117

What is AJAX?

AJAX stands for Asynchronous JavaScript and XML.

Question 118

Which is a backend language?

Python is commonly used as a backend programming language.

Question 119

What is Bootstrap?

Bootstrap is a popular CSS framework for responsive web design.

Question 120

What does API stand for?

API stands for Application Programming Interface.

CLOUD COMPUTING

Question 121

What is cloud computing?

Cloud computing delivers computing services (servers, storage, databases) over the

Question 122

Which is a cloud service provider?

AWS (Amazon Web Services) is a major cloud service provider.

Question 123

What is IaaS?

IaaS stands for Infrastructure as a Service.

Question 124

Which is NOT a cloud deployment model?

Local Cloud is not a standard cloud deployment model.

Question 125

What is SaaS?

SaaS stands for Software as a Service.

Question 126

Which service provides virtual machines?

IaaS provides virtualized computing resources including virtual machines.

Question 127

What is virtualization?

Virtualization creates virtual versions of hardware, storage, or network resources.

Question 128

Which company owns Azure?

Microsoft Azure is Microsoft's cloud computing platform.

Question 129

What is scalability in cloud?

Scalability is the ability to increase or decrease resources based on demand.

Question 130

What is cloud storage?

Cloud storage stores data on remote servers accessible via internet.

CYBERSECURITY

Question 131

What is encryption?

Encryption converts data into coded form to prevent unauthorized access.

Question 132

What is a firewall?

Firewall is a security system that monitors and controls network traffic.

Question 133

What is phishing?

Phishing is a fraudulent attempt to obtain sensitive information by disguising as

Question 134

What does VPN stand for?

VPN stands for Virtual Private Network.

Question 135

What is malware?

Malware is malicious software designed to harm computer systems.

Question 136

What is two-factor authentication?

Two-factor authentication requires two different forms of verification for security.

Question 137

What is ransomware?

Ransomware encrypts victim's files and demands ransom payment for decryption.

Question 138

What is SSL?

SSL stands for Secure Sockets Layer, used for secure communication.

Question 139

What is a DDoS attack?

DDoS (Distributed Denial of Service) overwhelms a system with traffic from

Question 140

What is a strong password characteristic?

Strong passwords contain combination of uppercase, lowercase, numbers, and

ARTIFICIAL INTELLIGENCE & ML

Question 141

What does AI stand for?

AI stands for Artificial Intelligence.

Question 142

What is machine learning?

Machine learning enables systems to learn and improve from experience without

Question 143

Which is a supervised learning algorithm?

Linear Regression is a supervised learning algorithm.

Question 144

What is neural network inspired by?

Neural networks are inspired by biological neural networks in human brain.

Question 145

What is deep learning?

Deep learning uses neural networks with multiple layers to learn complex patterns.

Question 146

What is NLP?

NLP stands for Natural Language Processing.

Question 147

Which is an unsupervised learning technique?

Clustering is an unsupervised learning technique.

Question 148

What is overfitting in ML?

 A) Model performs too well on training data but poorly on new data ✓

Overfitting occurs when model learns training data too well, including noise,

Question 149

What is a training set?

Training set is data used to train and teach machine learning model.

Question 150

What is computer vision?

Computer vision enables computers to derive information from digital images and

PUZZLES & BRAIN TEASERS

Question 151

A clock shows 3:15. What is the angle between hour and minute hands?

Hour hand at 3:15 = 97.5°, Minute hand at 15 min = 90°. Angle = 7.5°

Question 152

If 5 cats catch 5 mice in 5 minutes, how many cats catch 100 mice in 100

minutes?

Rate remains same. 5 cats catch 1 mouse per minute. So 5 cats catch 100 mice in

Question 153

A man has 3 daughters. Each daughter has 1 brother. How many

Children does he have?

3 daughters + 1 son (common brother to all) = 4 children

Question 154

What comes next: 1, 1, 2, 3, 5, 8, ?

Fibonacci series: Each number is sum of previous two. 5+8=13

Question 155

A bat and ball cost ₹110. The bat costs ₹100 more than ball. What does

Ball cost?

Let ball = x, bat = x+100. So x + x+100 = 110, 2x = 10, x = ₹5

Question 156

How many times do clock hands overlap in 24 hours?

Hands overlap 11 times in 12 hours (not at 11 o'clock). So 22 times in 24 hours.

Question 157

A father is 3 times as old as son. In 12 years, he’ll be twice as old. Son’s

Current age?

Let son = x, father = 3x. After 12 years: 3x+12 = 2(x+12), x = 12

Question 158

How many squares are on a chessboard?

8²+7²+6²+5²+4²+3²+2²+1² = 64+49+36+25+16+9+4+1 = 204

Question 159

A book has 500 pages. How many times does digit 1 appear in page

numbers?

Units: 50 (1,11,21...491), Tens: 100 (10-19,110-119...), Hundreds: 50 (100-199) =

Question 160

What is 1/2 of 2/3 of 3/4 of 4/5 of 100?

(1/2)×(2/3)×(3/4)×(4/5)×100 = (1×2×3×4×100)/(2×3×4×5) = 20

APTITUDE - TIME & WORK

Question 161

A can do work in 10 days, B in 15 days. Together in how many days?

A's rate = 1/10, B's rate = 1/15. Combined = 1/10 + 1/15 = 5/30 = 1/6. Time = 6

Question 162

12 men complete work in 9 days. How many men for 6 days?

Total work = 12×9 = 108 man-days. Men needed = 108/6 = 18

Question 163

A is twice as efficient as B. A takes 10 days. How long does B take?

If A takes 10 days and is twice as efficient, B takes 2×10 = 20 days

Question 164

6 men and 8 boys can do work in 10 days. 26 men and 48 boys in 2 days.

How long for 15 men and 20 boys?

From equations, find man and boy's daily work, then calculate for 15 men and 20

Question 165

A works 3 times faster than B. Together they finish in 12 days. How

long does B alone take?

Let B take x days. A takes x/3 days. 1/x + 3/x = 1/12, 4/x = 1/12, x = 48

APTITUDE - TIME & DISTANCE

Question 166

A car travels 60 km in 1 hour. How far in 2.5 hours?

Distance = Speed × Time = 60 × 2.5 = 150 km

Question 167

Two trains 120m and 80m long running at 60 km/h and 40 km/h cross

each other in?

Relative speed = 100 km/h = 27.78 m/s. Total distance = 200m. Time = 200/27.78

Question 168

A man walks 5 km North, 3 km East, 2 km North, 4 km East. How far

from start?

Total North = 7 km, Total East = 7 km. Distance = √(7²+7²) = √98 = 7√2 ≈ 9.9 ≈

Question 169

Speed of boat in still water is 15 km/h, stream speed is 3 km/h. Speed

Downstream?

Downstream speed = Boat speed + Stream speed = 15 + 3 = 18 km/h

Question 170

A person covers half distance at 40 km/h and remaining at 60 km/h.

Average speed?

Average speed = 2xy/(x+y) = 2×40×60/100 = 48 km/h

APTITUDE - PROBABILITY

Question 171

Probability of getting a prime number when a die is rolled?

Prime numbers on die: 2, 3, 5. Probability = 3/6 = 1/2

Question 172

Two coins are tossed. Probability of getting at least one head?

Outcomes: HH, HT, TH, TT. At least one head: 3 out of 4 = 3/4

Question 173

A bag has 3 red, 4 blue, 5 green balls. Probability of drawing a blue ball?

Total balls = 12. Blue balls = 4. Probability = 4/12 = 1/3

Question 174

Two dice rolled. Probability of sum being 7?

Combinations for 7: (1,6),(2,5),(3,4),(4,3),(5,2),(6,1) = 6 out of 36 = 1/6

Question 175

A card is drawn from 52 cards. Probability of getting a king?

Kings in deck = 4. Probability = 4/52 = 1/13

LOGICAL REASONING

Question 11

If all roses are flowers and some flowers are red, which statement is

Definitely true?

From "all roses are flowers," we can conclude that some flowers must be roses.

Question 12

Find the odd one out: 3, 9, 27, 81, 243, 729, 2188

All are powers of 3 except 2188 (3^0=1, 3^1=3, 3^2=9, 3^3=27, 3^4=81, 3^5=243,

Question 13

If CODING is written as DPEJOH, how is MOTHER written?

Each letter is shifted by +1 position. M→N, O→P, T→U, H→I, E→F, R→S

Question 14

Statement: All managers are employees. Some employees are engineers.

Conclusion: Some managers are engineers.

The conclusion doesn't necessarily follow from the premises.

Question 15

In a certain code, FRIEND is written as HUMJTK. How is SISTER

written?

Each letter is shifted by +2 positions.

Question 16

What comes next in the sequence: Z, X, V, T, ?

Decreasing by 2 letters each time: Z(-2)=X, X(-2)=V, V(-2)=T, T(-2)=R

Question 17

If A = 1, B = 2, C = 3… what is the value of COMPUTER?

C(3)+O(15)+M(13)+P(16)+U(21)+T(20)+E(5)+R(18) = 99

Question 18

Blood Relations: A is B’s sister. B is C’s father. D is C’s sister. How is A

related to D?

A is B's sister, and B is C and D's father, so A is their aunt.

Question 19

Direction: Ram walks 5m North, then 3m East, then 5m South. How far

is he from starting point?

He ends up 3m East of his starting point.

Question 20

If 5 Monday falls on 7th day of a month, what day is the 27th?

7th is Monday, 14th is Monday, 21st is Monday, 28th is Monday. So 27th is

TECHNICAL CONCEPTS

Question 176

What is polymorphism in OOP?

Polymorphism means ability to take many forms, allowing methods to do different

Question 177

What is inheritance?

Inheritance allows a class to acquire properties and methods from another class.

Question 178

What is abstraction?

Abstraction hides complex implementation and shows only necessary information.

Question 179

What is an interface in Java?

Interface is a completely abstract class that contains only abstract methods.

Question 180

What is garbage collection?

Garbage collection automatically frees memory by removing unused objects.

Question 181

What is constructor?

Constructor is a special method called when object is created to initialize it.

Question 182

What is method overloading?

Method overloading allows multiple methods with same name but different

Question 183

What is exception handling?

Exception handling is mechanism to handle runtime errors to maintain normal

Question 184

What is a static variable?

Static variable belongs to class rather than instances and is shared among all

Question 185

What is a package in Java?

Package is a namespace that organizes related classes and interfaces.

MORE PROGRAMMING

Question 186

What is recursion?

Recursion is when a function calls itself to solve a problem.

Question 187

What is the base case in recursion?

Base case is the condition that stops recursive calls.

Question 188

What is an array?

Array is a data structure that stores collection of elements of same type.

Question 189

What is string immutability?

In many languages, strings are immutable - once created, their content cannot be

Question 190

What is the difference between == and equals()?

In Java, == compares object references while equals() compares object content.

Question 191

What is final keyword?

Final keyword restricts modification: variable becomes constant, method cannot be

Question 192

What is an abstract class?

Abstract class cannot be instantiated and may contain abstract methods.

Question 193

What is difference between abstract class and interface?

Abstract class can have both abstract and concrete methods, interface (traditionally)

Question 194

What is ArrayList?

ArrayList is a resizable array implementation of List interface.

Question 195

What is HashMap?

HashMap stores data in key-value pairs and uses hashing for fast access.

ADDITIONAL APTITUDE

Question 196

If x² - 5x + 6 = 0, what are values of x?

(x-2)(x-3) = 0, so x = 2 or x = 3

Question 197

√(0.0001) = ?

√(0.0001) = √(1/10000) = 1/100 = 0.01

Question 199

What is 15% of 15% of 200?

15% of 200 = 30. Then 15% of 30 = 4.5

Question 200

The LCM of 12 and 18 is?

12 = 2²×3, 18 = 2×3². LCM = 2²×3² = 36

DATA INTERPRETATION

Question 201

In a class of 50 students, 30 play cricket, 25 play football, 15 play both.

How many play neither?

Using set theory: Total = Cricket + Football - Both + Neither. 50 = 30 + 25 - 15 +

Question 202

A pie chart shows: 30% North, 25% South, 20% East, 25% West. If

total is 1000, how many in East?

20% of 1000 = 200

Question 203

Sales increased from 500 to 600. What is percentage increase?

Increase = 100. Percentage = (100/500)×100 = 20%

Question 204

Average of 5 numbers is 40. If one number is removed, average

Becomes 35. What is removed number?

Sum of 5 = 200. Sum of 4 = 140. Removed = 200-140 = 60

Question 205

If A:B = 2:3 and B:C = 4:5, then A:B:C is?

A:B = 2:3 = 8:12 and B:C = 4:5 = 12:15. Therefore A:B:C = 8:12:15

MORE TECHNICAL

Question 206

What is big data?

Big data refers to extremely large datasets that traditional data processing software

Question 207

What is blockchain?

Blockchain is a distributed ledger technology that records transactions across

Question 208

What is IoT?

IoT stands for Internet of Things - network of physical devices connected to

Question 209

What is DevOps?

DevOps is a culture combining software development and IT operations for faster

Question 210

What is Docker?

Docker is a platform for developing, shipping, and running applications in

Question 211

What is microservices architecture?

Microservices architecture structures application as collection of loosely coupled

Question 212

What is REST API?

REST API is an architectural style for designing networked applications using

Question 213

What is JSON?

JSON is a lightweight data interchange format that is easy for humans and

Question 214

What is Agile methodology?

Agile is an iterative approach to software development emphasizing flexibility and

Question 215

What is CI/CD?

CI/CD automates software delivery process from code integration to deployment.

LOGICAL & ANALYTICAL

Question 216

If 2 = 6, 3 = 12, 4 = 20, 5 = 30, then 6 = ?

Pattern: n × (n+1) × 1. So 6 × 7 = 42

Question 217

Which number is different: 121, 144, 169, 189, 225?

All are perfect squares except 189 (11², 12², 13², 14²=196, 15²)

Question 218

A is taller than B, C is shorter than D, B is taller than D. Who is

shortest?

A>B>D>C, therefore C is shortest

Question 219

Complete series: AZ, BY, CX, DW, ?

First letter increases A→B→C→D→E, Second letter decreases

Question 220

If BEAR is coded as YVZI, how is LION coded?

Each letter shifts backward: L→Q(+5), I→R(-9→+17), O→R(+3), N→L(-2)...

Question 221

Statement: All birds can fly. Sparrow is a bird. Conclusion?

Following logical deduction: All birds fly, sparrow is bird, therefore sparrow can

Question 222

Mirror image of CLOCK at 3:00?

In mirror, 3:00 appears as 9:00

Question 223

How many triangles in a figure with 4 intersecting lines?

Depends on arrangement. Without specific figure, it varies.

Question 224

If South-East becomes North, what does North-West become?

SE→N means 135° clockwise rotation. NW→E with same rotation.

Question 225

A cube is painted red on all faces, then cut into 27 small cubes. How

many have 2 faces painted?

Edge cubes (not corners) have 2 painted faces. 3×3×3 cube has 12 edge pieces.

GENERAL COMPUTER KNOWLEDGE

Question 226

Who is known as father of computers?

Charles Babbage designed the Analytical Engine, considered first computer.

Question 227

What does USB stand for?

USB stands for Universal Serial Bus.

Question 228

What is the brain of computer?

CPU (Central Processing Unit) is considered the brain of computer.

Question 229

Which is fastest memory?

Cache memory is the fastest memory in computer hierarchy.

Question 230

What is the full form of BIOS?

BIOS stands for Basic Input Output System.

Question 231

Which company developed Windows?

Microsoft developed the Windows operating system.

Question 232

What is the extension of Word document?

Microsoft Word documents use .docx extension (or .doc for older versions).

Question 233

What does WWW stand for?

WWW stands for World Wide Web.

Question 234

Which protocol is used for browsing?

HTTP (Hypertext Transfer Protocol) is used for web browsing.

Question 235

What is phishing?

Phishing is fraudulent attempt to obtain sensitive information by disguising as

ADVANCED PROGRAMMING

Question 236

What is lambda function?

Lambda function is an anonymous (unnamed) function defined using lambda

Question 237

What is difference between list and tuple in Python?

Lists can be modified after creation, tuples cannot be changed.

Question 238

What does API stand for?

API stands for Application Programming Interface.

Question 239

What is the difference between GET and POST?

GET appends parameters to URL, POST sends data in request body (more secure).

Question 240

What is callback function?

Callback is a function passed as argument to be executed later.

Question 241

What is async/await?

Async/await provides cleaner syntax for handling asynchronous operations.

Question 242

What is closure in JavaScript?

Closure is when inner function has access to outer function's variables.

Question 243

What is hoisting?

Hoisting is JavaScript's behavior of moving declarations to top of scope.

Question 244

What is promise in JavaScript?

Promise represents the eventual completion (or failure) of an asynchronous

Question 245

What is DOM?

DOM stands for Document Object Model, programming interface for HTML