Systenics Solutions Trainee Interview Questions and Answers

Basic ques on speed distance

Easy level question based on DSA

Q1. What is contructor
Ans. 
A constructor is a special type of method in a class that is automatically called when an object of that class is created.
• Constructors have the same name as the class they belong to

• They are used to initialize the object's state

• Constructors can have parameters to customize the initialization process
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Q2. What is deadlock
Ans. 
Deadlock is a situation in which two or more processes are unable to proceed because each is waiting for the other to release a resource.
• Occurs in multitasking environments

• Caused by a circular wait, hold and wait, no preemption, and mutual exclusion

• Examples include two processes waiting for each other to release a lock or resource
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Q3. Threads in java
Ans. 
Threads in Java allow for concurrent execution of multiple tasks within a single program.
• Threads are lightweight sub-processes within a program.

• They allow for parallel execution of tasks, improving performance.

• Java provides built-in support for creating and managing threads using the Thread class.

• Example: Creating a new thread - Thread myThread = new Thread(() -> { // task to be executed });

• Example: Starting a thread -...read more
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Q4. Diff between string builder an buffer
Ans. 
String Builder is mutable, String Buffer is synchronized.
• String Builder is faster as it is not synchronized.

• String Buffer is thread-safe, String Builder is not.

• String Builder should be used in single-threaded environments, String Buffer in multi-threaded.

• Example: StringBuilder sb = new StringBuilder(); StringBuffer buff = new StringBuffer();
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Q1. Based on Resume
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