Cm Digital Agency Interview Questions and Answers

Its was moderate , basic questions and can written based on the cluster

It was easy its an combination of aptitude and gaming questions

Q1. What is Java, and why is it considered platform-independent?
Ans. 
Java is a programming language known for its platform independence due to its ability to run on any device with a Java Virtual Machine (JVM).
• Java is a high-level programming language developed by Sun Microsystems.

• It is considered platform-independent because Java programs are compiled into bytecode that can run on any device with a JVM.

• JVM acts as an interpreter that translates the bytecode into machine code specific t...read more
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Q2. What are the differences between method overloading and method overriding?
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Method overloading involves multiple methods in the same class with the same name but different parameters. Method overriding involves a subclass providing a specific implementation of a method that is already provided by its superclass.
• Method overloading is resolved at compile time based on the method signature, while method overriding is resolved at runtime based on the object type.

• Method overloading is used to incre...read more
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Q3. What is the program for checking if a string is a palindrome?
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A program to check if a string is a palindrome involves comparing the string with its reverse.
• Iterate through the string from both ends and compare characters.

• If all characters match, the string is a palindrome.

• Examples: 'radar' is a palindrome, 'hello' is not.
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Q4. Program for checking if given number is prime or not ?
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A program to check if a given number is prime or not.
• Iterate from 2 to square root of the number and check for divisibility

• If the number is divisible by any number other than 1 and itself, it is not prime

• Optimization: Check divisibility only up to square root of the number
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Q5. What are the different types of Structured query Languages (SqL)?
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Different types of SQL include MySQL, PostgreSQL, SQLite, Oracle SQL, and Microsoft SQL Server.
• MySQL - widely used open-source SQL database management system

• PostgreSQL - advanced open-source SQL database management system

• SQLite - self-contained, serverless, zero-configuration SQL database engine

• Oracle SQL - proprietary SQL database management system by Oracle Corporation

• Microsoft SQL Server - relational database manage
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Q6. Given an scenario to write sql query ?
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Q7. An aptitude question based on time and work
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Q8. What is the code for calculating the length of a rectangle given its breadth and area?
Ans. 
The code for calculating the length of a rectangle given its breadth and area involves dividing the area by the breadth.
• Calculate length = Area / Breadth

• For example, if the breadth is 5 and the area is 20, then the length would be 20 / 5 = 4
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Q9. What are the different types of data types in Java?
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Java has primitive data types (int, double, boolean, etc.) and reference data types (arrays, classes, interfaces, etc.)
• Primitive data types include int, double, boolean, char, etc.

• Reference data types include arrays, classes, interfaces, etc.

• Examples: int num = 10; double price = 19.99; boolean isTrue = true; String name = "John";
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Q10. What are the differences between the Java Virtual Machine (JVM), Java Runtime Environment (JRE), and Java Development Kit (JDK)?
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JVM executes Java bytecode, JRE includes JVM and libraries, JDK includes JRE and development tools.
• JVM is responsible for executing Java bytecode and providing a runtime environment.

• JRE includes JVM along with libraries and other components necessary to run Java applications.

• JDK includes JRE and development tools like compilers and debuggers for creating Java applications.

• JDK is required for developing Java application...read more
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Q11. What is a primary key in SQL?
Ans. 
A primary key in SQL is a unique identifier for each record in a table.
• Primary key ensures each record in a table is unique

• It can be a single column or a combination of columns

• Primary key values cannot be NULL

• Example: 'id' column in a 'users' table
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Q1. What improvements to interfaces were introduced in Java 8 that were missing in Java 7, specifically regarding static and default methods?
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Q2. Explain internal working of HashMap ? How to synchronize it ?
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Q3. Given a list of employees with their ratings, how can you sort the employees based on their ratings using the Java 8 Streaming API?
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Q4. Will the program compile if the parent class throws a runtime exception while the child class throws an arithmetic exception?
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Q5. In a Spring Boot application with two databases, how can you configure JDBC to specify which database to use?
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Q6. How to use a jetty server in your spring boot application ?
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Q7. Difference between @RequestParam and @PathVariable ?
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Q8. How would you handle a scenario where one microservice is awaiting a response from another microservice that is taking an extended time to respond?
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For example, a ₹10 LPA CTC could mean an in-hand salary of ₹70,000–₹75,000 per month, depending on deductions and benefits.

✨ 𝗣𝗿𝗼 𝗧𝗶𝗽: Always request a detailed salary structure during negotiations—it’s your roadmap to making informed decisions

𝗖𝗧𝗖 𝘃𝘀 𝗜𝗻-𝗛𝗮𝗻𝗱 𝗦𝗮𝗹𝗮𝗿𝘆: 𝗧𝗵𝗲 𝗥𝗲𝗮𝗹𝗶𝘁𝘆 𝗖𝗵𝗲𝗰𝗸 𝗘𝘃𝗲𝗿𝘆 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗡𝗲𝗲𝗱𝘀!

We’ve all been there—excitedly discussing job offers and hearing about the impressive CTC (Cost to Company). But when payday arrives, you wonder

Q1. 2️⃣ 𝗜𝗻-𝗛𝗮𝗻𝗱 𝗦𝗮𝗹𝗮𝗿𝘆: This is the actual amount you take home after deductions like: • Employee’s contribution to PF • Income tax (TDS) • Professional tax
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Q2. 𝗖𝗧𝗖 𝘃𝘀 𝗜𝗻-𝗛𝗮𝗻𝗱 𝗦𝗮𝗹𝗮𝗿𝘆: 𝗧𝗵𝗲 𝗥𝗲𝗮𝗹𝗶𝘁𝘆 𝗖𝗵𝗲𝗰𝗸 𝗘𝘃𝗲𝗿𝘆 𝗣𝗿𝗼𝗳𝗲𝘀𝘀𝗶𝗼𝗻𝗮𝗹 𝗡𝗲𝗲𝗱𝘀! We’ve all been there—excitedly discussing job offers and hearing about the impressi...read more
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Q1. What is the Singleton pattern ? in how many ways can this pattern be broken ?
Ans. 
Singleton pattern ensures a class has only one instance and provides a global point of access to it.
• Singleton pattern can be implemented by making the constructor private and providing a static method to access the instance.

• The pattern can be broken by using reflection to access the private constructor and create multiple instances.

• Another way to break the Singleton pattern is by using multiple class loaders in Java.

• Th...read more
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Q2. What is the internal implementation of hashmap? Let's assume that you want to store duplicate keys in the hashmap, how can we achieve the same in hashmap ?
Ans. 
HashMap internally uses an array of linked lists to store key-value pairs. To store duplicate keys, we can use a custom implementation of HashMap.
• HashMap internally uses an array of linked lists to handle collisions.

• To store duplicate keys, we can create a custom HashMap implementation that allows multiple values for the same key.

• One approach is to use a HashMap with values as lists, where each key can have multiple va
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Q1. What microservices patterns are you aware ? let's assume that there is a microservice based architecture and service A is calling service B which in turn service C. If service b fails, how will you manage ...read more
Ans. 
Use compensating transactions and distributed tracing for managing transaction and logging in case of service B failure.
• Implement compensating transactions to rollback changes made by service B in case of failure.

• Use distributed tracing to track the flow of requests and identify where the failure occurred.

• Implement retry mechanisms to handle transient failures in service B.

• Use circuit breakers to prevent cascading fail...read more
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Q2. System Design question : Design a booking wesite for.eg: bookin.com ?
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Q1. Run time polymorphism code
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Q2. Linked list code
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Q3. Deep copy shallow copy differences
Ans. 
Deep copy creates a new copy of an object with its own unique memory space, while shallow copy creates a new object that references the same memory locations as the original object.
• Deep copy duplicates all nested objects, while shallow copy only duplicates the references to nested objects.

• Deep copy ensures that changes to the copied object do not affect the original object, while shallow copy may lead to unintended sid...read more
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Q1. More deep questions about polymorphism code
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Q2. Code for interchange of strings without strcpy
Ans. 
Use a loop to swap characters of two strings without using strcpy function.
• Create two arrays of characters to store the strings

• Use a loop to iterate through each character of the strings and swap them

• Ensure to handle cases where strings have different lengths
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Q1. What is the potential of artificial intelligence (AI)?
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Q2. What is advanced Excel?
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Q3. What is the Hardwear Installation
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Q4. What is the software installation process
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Q5. Different between Software and Hardware
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Q1. Explore the your work experience in previous company?
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Q2. Explain the roles and responsibilities
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Q1. Tell me about yourself.
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Q2. What do you know about DITA XML, which tags have you used in your documents, what are keywords, and what is DITA mapping, have you ever created graphics or illustrations, types of DITA topics, benefits of ...read more
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Q3. What do you know of Agile Methodology and Scrum?
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Q4. What do you do in case of conflict with SMEs, have you worked with any global audience, what kind of documents have you created, how do you estimate time needed for your document.
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Q5. How do you receive input, what are DDLC and SDLC, what style guides have you used for creating documents, how do you ensure accuracy in your document.
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Q6. What is design thinking, have you ever communicated with developers, what do you do when you do not have enough information but the deadline is already near?
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Q7. Have you worked with any version control systems?
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