NCR Voyix Software Developer II Interview Questions and Answers for Experienced

Q1. Explain psvm in java
Ans. 
psvm in Java stands for public static void main, which is the entry point for a Java program.
• psvm is the method signature for the main method in Java programs.

• It is used to start the execution of a Java program.

• It must be declared as public, static, and void.

• It takes an array of strings as an argument, which can be used to pass command line arguments.
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Q2. Explain collection
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A collection is a group of related objects or data items that are stored together.
• Collections can be implemented using data structures like arrays, lists, sets, maps, etc.

• Collections allow for easy manipulation and organization of data.

• Examples of collections include arrays of integers, lists of strings, sets of unique values, and maps of key-value pairs.
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Simple competitive questions

Q1. Questions in resume
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Q2. Domain questions
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Q3. Live scenario related questions
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Q1. Salary discussion
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Q2. About vmware and company culture
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Q1. Call apply bind
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Q2. Clusure and promises
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Q1. Focus on coding, Question: find the duplicate string from list of string and the count of it(how many times it is repeated) Prepare oops and collections concepts.
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Q2. Focus on method overriding
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Q3. Difference between arraylist and LinkedInlist
Ans. 
ArrayList is a resizable array implementation while LinkedList is a doubly linked list implementation.
• ArrayList uses dynamic arrays to store elements, allowing fast random access but slower insertion and deletion.

• LinkedList uses nodes with pointers to the next and previous elements, allowing fast insertion and deletion but slower random access.

• Example: ArrayList - List names = new ArrayList<>(); LinkedList - List citie
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Q4. Use of static keyword
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The static keyword in programming is used to declare variables, methods, or classes that belong to the class itself rather than instances of the class.
• Static variables are shared among all instances of a class.

• Static methods can be called without creating an instance of the class.

• Static classes cannot be instantiated and are used for grouping related methods and variables.

• Example: public static int count = 0; // static
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Q1. 2 DSA questions
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Q1. Half an hour of behavioral questions and 1 DSA question
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Q1. One hour discussion of the work that I have done till now
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Q1. 1 Hard DSA question
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Q1. 1 Hard DSA question
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Q1. Design round for HLD
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Q1. SOLID Principles
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Q1. Asked java coding and system design
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Q2. Facebook and parking lot
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Q3. Java 8 stream and lambda
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Q1. Explain threads, Collection framework, code to remove duplicates and code on linkedlists
Ans. 
Threads are lightweight processes within a program, Collection framework provides data structures, code to remove duplicates involves using sets, code on linkedlists involves traversal and manipulation.
• Threads are independent paths of execution within a program.

• Collection framework provides interfaces and classes for storing and manipulating groups of objects.

• To remove duplicates from a list, we can use a Set data stru...read more
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