Delhi Metro Rail Corporation QA QC Engineer Interview Questions and Answers

Q1. Tell me about yourself
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Q2. How to use vernier calliper
Ans. 
Vernier caliper is a precision measuring tool used to measure dimensions with high accuracy.
• Ensure the jaws are clean and properly aligned before use

• Close the jaws and adjust the main scale to zero

• Open the jaws and place the object to be measured between them

• Close the jaws gently to ensure a snug fit and read the measurement on the vernier scale

• Take the measurement from the point where the zero on the vernier scale ali...read more
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Q1. How are you introduce yourself.
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Q2. Why you are choosing Maersk
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Q1. A project and questions on project
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Advance aptitude questions which took 1 hour to solve

Advance Coding questions

Q1. Asked question related to selenium, java, API
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Q1. What is function overloading? main method can be overloaded? Automate naukri.com using selenium. Given array of 0 and 1 pur all zero to start and 1 at the end.
Ans. 
Function overloading is the ability to define multiple functions with the same name but different parameters. The main method cannot be overloaded.
• Function overloading allows multiple functions with the same name but different parameters to coexist in a program.

• Example: int add(int a, int b) and float add(float a, float b) are overloaded functions.

• The main method in Java cannot be overloaded as it is the entry point of...read more
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Q1. Oops concept, basics of selenium locators sendkeys navigate action. Rev string code SQL query Http status codes.
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Q1. What is multithreading in java?
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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
Ans. 
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. Quality Assurance, Scripting, Automation Questions
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