Tech Mahindra Software Engineer Interview Questions and Answers for Freshers

Basic aptitude questions, puzzles and memory games

Q1. What is the difference between String and StringBuilder, and in what circumstances should each be used?
Ans. 
String is immutable; StringBuilder is mutable. Use String for fixed text, StringBuilder for dynamic string manipulation.
• Strings are immutable, meaning once created, they cannot be changed. Example: String str = 'Hello'; str = str + ' World';

• StringBuilder is mutable, allowing for dynamic modifications without creating new objects. Example: StringBuilder sb = new StringBuilder('Hello'); sb.Append(' World');

• Use String for...read more
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Q2. What are the key concepts of Object-Oriented , and why are they used?
Ans. 
Key concepts of Object-Oriented Programming include encapsulation, inheritance, polymorphism, and abstraction, enhancing code reusability.
• Encapsulation: Bundling data and methods that operate on the data within one unit (class). Example: A 'Car' class with properties like 'speed' and methods like 'accelerate()'.

• Inheritance: Mechanism to create a new class from an existing class, inheriting its attributes and methods. E...read more
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If you learn perfectly it will be easy

If you practice perfectly it will be easy

Q1. What is the difference between java and c++
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Q2. Diff between single inheritance and multiple inheritance
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Apple program and some c programming and python

Q1. Engineering questions and some coding questions
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Q2. Explain operators in
Ans. 
Operators in programming are symbols that perform specific operations on one or more operands.
• Operators can be arithmetic (+, -, *, /), assignment (=), comparison (==, !=, <, >), logical (&&, ||, !), bitwise (&, |, ^), etc.

• Unary operators operate on a single operand, while binary operators operate on two operands.

• Examples: 5 + 3 (addition), x = 10 (assignment), a == b (comparison), true && false (logical)
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Q1. Asked most of the things based on ML
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Q2. How do you train a machine?
Ans. 
Training a machine involves feeding it data and adjusting parameters to improve its performance on specific tasks.
• 1. Data Collection: Gather relevant data for the task, e.g., images for image recognition.

• 2. Data Preprocessing: Clean and format the data, such as normalizing pixel values in images.

• 3. Model Selection: Choose an appropriate algorithm, like neural networks for complex tasks.

• 4. Training: Use the data to trai...read more
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Core java programs test

Q1. Project details , Check programing skill
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Q1. Salary discussion
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Q1. Salary discussion
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