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Iasys Technology Solutions Interview Questions and Answers

Updated 8 Oct 2024

Q1. what is class object, inheritance, function overloading ,function overriding, difference between encapsulation and abstraction, volatile keyword

Ans.

Class object is an instance of a class, inheritance allows a class to inherit properties and methods from another class, function overloading is defining multiple functions with the same name but different parameters, function overriding is redefining a function in a subclass, encapsulation is bundling data and methods that operate on the data into a single unit, abstraction is hiding the implementation details and showing only the necessary details, volatile keyword is used ...read more

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Q2. What is semaphore and mutex, binary semaphore, thread and process

Ans.

Semaphores and mutex are synchronization mechanisms in multithreading. Threads are lightweight processes, while processes are independent execution units.

  • Semaphore: used to control access to a shared resource by multiple threads. Example: controlling access to a printer in a networked system.

  • Mutex: similar to a semaphore but only allows one thread to access a resource at a time. Example: protecting a critical section of code.

  • Binary semaphore: a semaphore with only two states,...read more

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Q3. Introduction, in which programming language are you comfortable( 45 min)

Ans.

I am comfortable with C, C++, and Python for embedded software development.

  • Proficient in C for low-level programming

  • Experienced in C++ for object-oriented design

  • Skilled in Python for scripting and automation tasks

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Q4. what is pointer and it's type

Ans.

A pointer is a variable that stores the memory address of another variable.

  • Types of pointers include null pointers, void pointers, function pointers, and array pointers.

  • Example: int *ptr; // pointer to an integer variable

  • Example: char *str = 'hello'; // pointer to a character array

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Q5. write a java program to revers the string (for eg :"this is string" is string so revers should be : string is this)

Ans.

Java program to reverse a string

  • Use StringBuilder class to reverse the string

  • Convert the string to StringBuilder object

  • Use reverse() method of StringBuilder class to reverse the string

  • Convert the StringBuilder object back to string

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Q6. 5)what is stack?? 6)explain ArrayList 7) what is split method in java string class

Ans.

Questions related to basic programming concepts in Java.

  • Stack is a data structure that follows the Last-In-First-Out (LIFO) principle.

  • ArrayList is a dynamic array that can grow or shrink in size and is part of the Java Collections Framework.

  • The split() method in Java String class is used to split a string into an array of substrings based on a delimiter.

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