Cognizant Interview Questions, Process, and Tips for Freshers

Was easy. hashmap array question

Easy apti questions.

Q1. What is the difference between hashtable and hash map
Ans. 
Hashtable is synchronized and does not allow null keys, while hashmap is not synchronized and allows one null key.
• Hashtable is synchronized, while hashmap is not.

• Hashtable does not allow null keys, while hashmap allows one null key.

• Hashtable is thread-safe, while hashmap is not.

• Hashtable is slower than hashmap.

• Hashtable is part of the legacy collection classes, while hashmap is part of the Java Collections Framework.
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Q1. Asked about the core
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Q1. Relocation, salary
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Q1. What is roadmap
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Q2. Metrics you capture
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There were basically 3 sections during the aptitude test. First one was the quantative aptitude test. Next section was a gaming section where basically you have to solve some gaming puzzle using your logical reasoning skill. And the last one was the verbal ability test where question on grammatical analysis like to find the error in a sentence, to put the right preposition etc. was there.

Q1. Question will be asked basically on the topics present in your resume. Like in my resume there were oops so they asked me about the pillars of oops and to describe then in brief
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Q2. The interviewer will also ask you some hr questions like if you will be able for relocate for this job, or if you will be able to learn new technologies for this job etc.
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Q3. Questions on web development
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Q4. Questions on cloud computing
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Q1. Write a code to reverse string "Selenium"
Ans. 
Code to reverse a string
• Use the built-in reverse() function to reverse the string

• Convert the string to an array of characters, reverse the array, and then join the characters back into a string
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Q2. Synchronization in selenium
Ans. 
Synchronization in Selenium is the process of ensuring that the test scripts wait for the web elements to load before performing actions on them.
• Synchronization is important to avoid timing issues and ensure accurate test results.

• There are two types of synchronization in Selenium: implicit and explicit.

• Implicit synchronization uses the default timeout value to wait for elements to load.

• Explicit synchronization uses exp...read more
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