Cognam Technologies Interview Questions and Answers

Q1. Basic apptitude like time and work,problems on train
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Q2. Some java,c and js output prediction question
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Q1. Multiple sql query using groupby having join
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Q2. Dsa questions like 2sum problem and code optimization
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3 coding questions are asking to oa

Q1. Tell me about your self?
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Q2. Resume based interview
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Q1. Tell me about yourself?
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Q2. Family's background
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Online assessment with 2 coding questions and technical mcq's.

Q1. Examples where stack data structure is used?
Ans. 
Stack data structure is used in function call stack, undo mechanisms, and expression evaluation.
• Function call stack in programming languages like C, Java, etc.

• Undo mechanisms in text editors and software applications.

• Expression evaluation in compilers and calculators.
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Q2. Memory management in java?
Ans. 
Memory management in Java involves automatic garbage collection to reclaim unused memory.
• Java uses automatic garbage collection to reclaim memory by identifying and deleting objects that are no longer in use.

• Memory in Java is divided into two main areas: stack memory for method calls and local variables, and heap memory for objects.

• Java provides the 'finalize()' method for objects to perform cleanup actions before they
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Q3. HTML basic questions?
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Q4. Medium level coding problem?
Ans. 
Implement a function to sort an array of strings based on the length of each string.
• Use a sorting algorithm like quicksort or mergesort to sort the array based on the length of each string.

• You can define a custom comparator function to compare the lengths of the strings.

• Handle edge cases like empty strings or strings with equal lengths.
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