Wissen Technology Interview Questions, Process, and Tips

Coding question for SQL and multiple choice questions around pyspark and python

They will test your coding ability on first round, for me they kept test on hacker earth.

Two simple coding questions were asked.

One multithreading questions was asked and few theoretical questions.

Q1. Few code snippets were provided on OOPs and result was asked.
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Q2. Sql query was asked.
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Q3. Two more rounds are still left
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Angular assignment
1. Using angular framework implement Login functionality

Q1. Closures, hoisting, arrow function, code output, write small programs java script, 3 coding questions
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Q1. Angular concept routing, template , services, interceptor, jit, etc
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Q1. Scenario based angular questions
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Q1. Culture fit, salary discussion
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Q1. I was asked kodane's algorithm and coding question which I had to solve using java 8 and two SQL questions which had essence of group by.
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Q1. They had immediate requirement so they wanted someone who can join within 15 days.I said that is not possible so no further interview.
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1 hr. of the test, 10 questions on core Java concepts, 2 SQL queries, 2 coding question

Q1. 2 coding questions, 1 SQL queries
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Q2. Sorting in the string
Ans. 
Sorting strings in an array
• Use Arrays.sort() method to sort the array of strings

• You can also use a custom Comparator to define the sorting criteria

• Remember that sorting is case-sensitive by default
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Q3. Priority queue in the array
Ans. 
Priority queue can be implemented using an array by maintaining the order of elements based on their priority.
• Maintain the order of elements in the array based on their priority level.

• When adding elements, insert them in the correct position to maintain the priority order.

• When removing elements, remove the element with the highest priority first.

• Example: ["High Priority", "Low Priority", "Medium Priority"]
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Q4. Left join on two table
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Q1. 1 coding question on the stack, this interviewer was not good, he did not show any attention in the interview.
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Q2. 1 question on the stack
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