Maersk QA Engineer Interview Questions and Answers

2 coding ques in 1 hr

Q1. Core java and oops
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Q2. Use of this keyword in java
Ans. 
The 'this' keyword in Java refers to the current instance of the class.
• Used to refer to instance variables or methods of the current object

• Can be used to differentiate between instance variables and local variables with the same name

• Can be passed as an argument to other methods
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Q3. Difference between final and finally
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final is a keyword used in Java to declare constants, while finally is a block of code used in exception handling to ensure a piece of code is always executed.
• final is used to declare constants in Java, its value cannot be changed once assigned

• finally is a block of code used in exception handling to ensure a piece of code is always executed, regardless of whether an exception is thrown or not

• Example: final int MAX_VALU...read more
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Q4. Basic principles of oops
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Basic principles of OOP include encapsulation, inheritance, and polymorphism.
• Encapsulation: Bundling data and methods that operate on the data into a single unit (class).

• Inheritance: Ability of a class to inherit properties and behavior from another class.

• Polymorphism: Ability to present the same interface for different data types.

• Example: A 'Car' class may have properties like 'color' and 'model', and methods like 'st
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Q5. Method over riding and method overloading
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Advance aptitude questions which took 1 hour to solve

Advance Coding questions

Q1. What is multithreading in java?
Ans. 
Multithreading in Java allows multiple threads to execute concurrently within a single program.
• Multithreading helps in improving the performance of applications by utilizing multiple CPUs or CPU cores.

• Each thread runs independently and shares the same memory space.

• Java provides built-in support for multithreading through the java.lang.Thread class or implementing the java.lang.Runnable interface.

• Example: Creating a new...read more
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Q2. Detect a cycle in linkedList
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Detecting a cycle in a linked list by using two pointers approach.
• Use two pointers approach - slow pointer moves one step at a time, fast pointer moves two steps at a time.

• If there is a cycle, the two pointers will eventually meet at some point.

• Check if the fast pointer reaches the end of the list (null) before meeting the slow pointer to determine if there is a cycle.
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Q1. Asked question related to selenium, java, API
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Java questions based on string and 2d array

Q1. Selenium, java , manual , API related question, Program asked to find out duplicate
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Q2. Oops concept, syntax of screenshot parameterization
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Q1. Manager round ask project related question also some technical
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