Mphasis Interview Questions, Process, and Tips

90 minutes. verbal ability, quants, logical reasoning, programming

Q1. Print an array of 5 numbers
Ans. 
Printing an array of 5 numbers using strings
• Declare an array variable with 5 elements

• Assign numbers as strings to each element

• Print the array using a loop or directly
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Q2. Given two variables. swap the two variables
Ans. 
To swap two variables, create a temporary variable to hold one value, then assign the values of the two variables to each other.
• Create a temporary variable to hold one of the values

• Assign the value of the first variable to the temporary variable

• Assign the value of the second variable to the first variable

• Assign the value of the temporary variable to the second variable
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Q1. Sql questions on rdbms
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Q2. Java questions on ooops
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Q1. ReduceByKey vs groupByKey
Ans. 
reduceByKey is more efficient than groupByKey for aggregating data in Spark due to reduced shuffling.
• reduceByKey combines values for each key in each partition before shuffling data

• groupByKey shuffles all data to a single partition before combining values for each key

• reduceByKey is preferred for large datasets to minimize data movement and improve performance
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Q2. Word count in scala
Ans. 
Scala provides a simple way to count words in a string using built-in functions.
• Use the split function to split the string into an array of words

• Use the length function to get the count of words in the array
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Q3. Second highest salary SQL
Ans. 
Use SQL query with ORDER BY and LIMIT to find the second highest salary.
• Use ORDER BY clause to sort salaries in descending order

• Use LIMIT 1,1 to skip the first highest salary and get the second highest salary
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Reasoning questions for the around 2 hour of test

Q1. Flexible for night shift
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Q1. Expectations for salary
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The round1 was aptitude test it was average level neither easy nor hard

Q1. What is shortest path algo
Ans. 
Shortest path algo is a method to find the most efficient route between two points in a graph or network.
• Shortest path algorithms are used in various applications such as GPS navigation systems, network routing, and logistics planning.

• Examples of shortest path algorithms include Dijkstra's algorithm, Bellman-Ford algorithm, and Floyd-Warshall algorithm.

• These algorithms calculate the shortest path based on different cri...read more
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Q2. What is diff b/w compiler and interpreter
Ans. 
Compiler translates entire code into machine code before execution, while interpreter translates code line by line during execution.
• Compiler converts entire code into machine code before execution

• Interpreter translates code line by line during execution

• Compiler generates intermediate object code or executable file

• Interpreter does not generate intermediate object code

• Examples: C, C++ compilers vs Python, Ruby interprete
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Q3. What are 4 pillars of oops
Ans. 
The 4 pillars of OOP are Inheritance, Encapsulation, Abstraction, and Polymorphism.
• Inheritance allows a class to inherit properties and behavior from another class.

• Encapsulation restricts access to certain components within a class, protecting the data.

• Abstraction hides the complex implementation details and only shows the necessary features.

• Polymorphism allows objects to be treated as instances of their parent class.
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Q1. Tell me about the company
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Q2. What is your hobby
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Q1. Explain java jvm
Ans. 
Java JVM stands for Java Virtual Machine, which is a virtual machine that enables a computer to run Java programs.
• Java JVM is a virtual machine that interprets Java bytecode and executes it on the underlying hardware.

• It provides platform independence by abstracting the hardware and operating system details.

• JVM manages memory, garbage collection, and runtime environment for Java programs.

• Examples of JVM implementations
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Q2. Explain encapsulation
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Encapsulation is the concept of bundling data and methods that operate on the data into a single unit.
• Encapsulation helps in hiding the internal state of an object and restricting access to it.

• It allows for data hiding, which prevents outside code from directly accessing an object's internal state.

• Encapsulation also helps in achieving data abstraction, where the internal details of an object are hidden and only the nec...read more
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