TCS Production Support Analyst Interview Questions and Answers

Q1. How to list files
Ans. 
To list files, use command line tools like ls or dir.
• Use 'ls' command in Unix/Linux systems to list files in a directory

• Use 'dir' command in Windows systems to list files in a directory

• Add options like -l for detailed listing or -a to show hidden files

• Use wildcards like * to filter files based on patterns
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Q2. Diff between grep and egrep
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grep is a basic pattern matching tool, while egrep is an extended version with more advanced pattern matching capabilities.
• grep is a basic command-line utility for searching plain-text data sets for lines that match a regular expression pattern.

• egrep is an extended version of grep that supports more advanced regular expression patterns.

• egrep is equivalent to grep -E, which enables extended regular expressions.

• egrep is ...read more
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Q1. What is internal working of hashmap
Ans. 
HashMap is a data structure that stores key-value pairs and uses hashing to quickly retrieve values based on keys.
• HashMap internally uses an array of linked lists to store key-value pairs.

• When a key-value pair is added, the key is hashed to determine the index in the array where the pair will be stored.

• If multiple key-value pairs hash to the same index, they are stored in a linked list at that index.

• To retrieve a value...read more
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Q2. What is difference between hashmap and concurrent hashmap
Ans. 
HashMap is not thread-safe while ConcurrentHashMap is thread-safe.
• HashMap is not thread-safe and can lead to ConcurrentModificationException if modified while iterating.

• ConcurrentHashMap allows concurrent modifications without the need for external synchronization.

• ConcurrentHashMap achieves thread-safety by dividing the map into segments, allowing multiple threads to operate on different segments concurrently.

• Concurren...read more
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Q3. Can we override main method in java
Ans. 
No, main method in Java cannot be overridden.
• Main method is a static method of a class and cannot be overridden.

• Subclasses can have their own main method, but it will not be considered as the entry point of the program.

• Example: public class SubClass extends MainClass { public static void main(String[] args) { // This is not the entry point of the program }}
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Q4. Write the command to find the hidden files in unix
Ans. 
Use the 'ls' command with the '-a' flag to find hidden files in Unix.
• Use the command 'ls -a' to list all files, including hidden files.

• Hidden files in Unix start with a dot (.) before the file name.

• Example: 'ls -a' will display all files, including hidden files.
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Q5. Write a command to replace a string in unix
Ans. 
Use the sed command to replace a string in Unix
• Use the following syntax: sed 's/original_string/new_string/g' filename

• The 's' flag stands for substitute, 'g' flag stands for global (replace all occurrences)

• Example: sed 's/hello/goodbye/g' file.txt
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24/7 production environment

Q1. What is the difference between PL SQL AND SQL?
Ans. 
PL/SQL is a procedural language extension to SQL used for writing complex queries and programs.
• SQL is used for querying and manipulating data in a database

• PL/SQL is used for writing complex queries and programs

• PL/SQL is a procedural language that extends SQL with programming constructs like loops and conditional statements

• PL/SQL is used to create stored procedures, functions, and triggers in Oracle databases
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Q2. About programming
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Q3. Write a query using below data to find out last string from emp table?
Ans. 
Query to find last string from emp table
• Use the ORDER BY clause with DESC keyword to sort the table in descending order

• Use the LIMIT keyword to limit the result to 1 row

• Assuming the last string refers to the last row in the table
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Q4. Write s query to find maximum salary from EMP?
Ans. 
Query to find maximum salary from EMP
• Use the MAX() function to find the maximum salary

• Specify the column name for salary in the SELECT statement

• Specify the table name and column name for salary in the FROM clause
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It was Easy to medium . overall good

It was Medium to tough level

Q1. What is fifo lifo
Ans. 
FIFO (First In, First Out) and LIFO (Last In, First Out) are inventory management methods.
• FIFO: Items that are added first are the first to be removed. Like a queue.

• LIFO: Items that are added last are the first to be removed. Like a stack.
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Q2. Whole data structure concepts
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Q1. What do you want to change in this country if you get a chance
Ans. 
I would focus on improving access to quality education for all citizens.
• Implementing policies to ensure equal opportunities for education

• Investing in infrastructure and resources for schools in underserved areas

• Providing scholarships and financial aid for students from low-income families

• Promoting vocational training programs to address skills gaps in the workforce
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Q2. I don't remember
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Q1. Self introduction
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Q2. Work experience
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Q3. Which department are u working
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Q4. Timings and salary
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Q1. Name and experience and quality and checking etc
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Q2. How can handle ur problem and team work
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Q3. Times and salary
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Q1. What is your current role in organization
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Q2. What is your salary expeactation
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Easy logical questions

Q1. Easy general questions asked
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Q2. General questions
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Q3. Strength and weaknesses, about project
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Q1. What is a role of support engineer
Ans. 
A support engineer is responsible for providing technical assistance and resolving issues related to software or hardware systems.
• Providing technical support to customers or end-users

• Troubleshooting and resolving software or hardware issues

• Installing, configuring, and maintaining systems

• Monitoring system performance and identifying potential problems

• Collaborating with development teams to address bugs or enhancements

• Do...read more
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Q2. What is ticketing tool
Ans. 
A ticketing tool is a software application used to track and manage customer support requests or issues.
• Ticketing tools help in organizing and prioritizing customer support tickets.

• They provide a centralized platform for communication and collaboration between support teams and customers.

• Ticketing tools often include features like ticket assignment, status tracking, and reporting.

• Examples of popular ticketing tools inc
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Q3. What is monitoring tool
Ans. 
A monitoring tool is a software application or system that collects and analyzes data to track the performance and health of a system or application.
• Monitoring tools collect data from various sources such as servers, networks, databases, and applications.

• They provide real-time visibility into the system's performance, availability, and resource utilization.

• Monitoring tools can generate alerts or notifications when pred...read more
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Q4. What are SQL comments
Ans. 
SQL comments are used to add explanatory notes or remarks within SQL code.
• SQL comments start with a double hyphen (--), or can be enclosed between /* and */

• Comments are ignored by the SQL engine and are not executed as part of the code

• Comments can be used to improve code readability and provide documentation

• Comments can be used to disable or temporarily remove parts of the code for testing or debugging purposes
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Q5. What doing in the SQL
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Q6. What is DML full form
Ans. 
DML stands for Data Manipulation Language.
• DML is a subset of SQL (Structured Query Language) used to manipulate data in a database.

• It includes commands like INSERT, UPDATE, DELETE, and SELECT.

• DML statements are used to add, modify, or delete data in database tables.

• For example, INSERT statement is used to add new records, UPDATE statement is used to modify existing records, DELETE statement is used to remove records, a...read more
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