Capgemini Senior Software Engineer Interview Questions, Process, and Tips

Round duration - 60 Minutes
Round difficulty - Medium

This round consisted of 1 question from DSA and the rest of them were related to Java and API Testing.

Q1. 
Trailing Zeros in Factorial Problem
Find the number of trailing zeroes in the factorial of a given number N.
Input:
The first line contains an integer T representing the number of test cases.
Each of the...read more
Ans. 
Count the number of trailing zeros in the factorial of a given number.
• Calculate the number of 5's in the prime factorization of N to find the number of trailing zeros.

• Divide N by 5, then by 25, then by 125, and so on, and sum up the quotients to get the answer.

• Example: For N=10, 10/5=2, so there are 2 trailing zeros in 10!.
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Q2. What is a classloader in Java?
Ans. 
A classloader in Java is a part of the Java Runtime Environment that dynamically loads Java classes into the Java Virtual Machine.
• Classloaders are responsible for loading classes during runtime based on the fully qualified name of the class.

• There are different types of classloaders in Java such as Bootstrap Classloader, Extension Classloader, and System Classloader.

• Classloaders follow a delegation model where a classlo...read more
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Q3. Why are Java Strings immutable in nature?
Ans. 
Java Strings are immutable to ensure thread safety, security, and optimization.
• Immutable strings are thread-safe as they cannot be modified concurrently by multiple threads.

• Immutable strings prevent security vulnerabilities like injection attacks.

• Immutable strings allow for optimization by caching and reusing string literals.
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Q4. What is latency in API testing?
Ans. 
Latency in API testing refers to the time delay between sending a request and receiving a response.
• Latency can be affected by network speed, server load, and processing time.

• Measuring latency helps in identifying performance bottlenecks and optimizing API performance.

• Examples of tools used to measure latency in API testing include JMeter, Postman, and Gatling.
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Round duration - 60 Minutes
Round difficulty - Medium

Standard OS questions related to Java were asked in this round followed by some questions from Selenium and JUnit.

Q1. Can you explain the life cycle of a thread in Java?
Ans. 
The life cycle of a thread in Java involves creation, running, blocking, and termination.
• A thread is created by instantiating a class that extends Thread or implements Runnable interface.

• The thread starts running when the start() method is called, executing the run() method.

• A thread can be blocked by calling sleep(), wait(), or join() methods.

• A thread terminates when the run() method completes or when stop() method is
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Q2. Why is Java considered platform independent, while the Java Virtual Machine (JVM) is platform dependent?
Ans. 
Java is platform independent because it compiles code into bytecode that can run on any system with JVM, which is platform dependent.
• Java code is compiled into bytecode, which is platform independent

• JVM interprets bytecode and translates it into machine code specific to the underlying platform

• JVM acts as a layer of abstraction between Java code and the operating system

• Example: A Java program compiled on Windows can run
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Q3. What are JUnit annotations?
Ans. 
JUnit annotations are special markers used in JUnit tests to define the behavior of the test methods.
• Annotations like @Test indicate that the method is a test method.

• Annotations like @Before and @After indicate methods that should be run before and after each test method.

• Annotations like @BeforeClass and @AfterClass indicate methods that should be run once before and after all test methods in a test class.

• Annotations l...read more
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Q4. What are the limitations of Selenium?
Ans. 
Selenium limitations include lack of support for non-web applications, difficulty in handling dynamic elements, and slow execution speed.
• Limited support for non-web applications such as desktop or mobile apps

• Difficulty in handling dynamic elements that change frequently

• Slow execution speed compared to other automation tools

• Requires a good understanding of locators and web elements to effectively automate tests
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Q5. Can you explain the various navigation commands supported by Selenium?
Ans. 
Selenium supports various navigation commands for interacting with web pages.
• Some navigation commands supported by Selenium include get(), navigate().to(), navigate().back(), navigate().forward(), and navigate().refresh().

• The get() command is used to open a webpage by providing the URL as a parameter.

• The navigate().to() command is used to navigate to a specific URL.

• The navigate().back() command is used to navigate back...read more
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Round duration - 30 Minutes
Round difficulty - Easy

This was a typical HR round with some standard Behavioral questions .

Q1. What is something about you that is not included in your resume?
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