Com1 Communication Technologies Interview Questions and Answers

Q1. What is the process for importing and exporting a CSV file in a database table without the use of third-party applications?
Ans. 
Importing and exporting CSV files in a database involves reading data from CSV and writing it to a table using SQL commands.
• Importing CSV: Use the 'LOAD DATA INFILE' command in MySQL to import data from a CSV file into a table. Example: 'LOAD DATA INFILE 'file.csv' INTO TABLE my_table FIELDS TERMINATED BY ',';'

• Exporting CSV: Use the 'SELECT ... INTO OUTFILE' command to export data from a table to a CSV file. Example: '...read more
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Q2. What is the difference between array_merge and array_combine in PHP?
Ans. 
array_merge combines arrays by appending elements, while array_combine creates an array using one array for keys and another for values.
• array_merge: Merges multiple arrays into one. Example: array_merge(['a', 'b'], ['c', 'd']) results in ['a', 'b', 'c', 'd'].

• array_combine: Creates an associative array using one array for keys and another for values. Example: array_combine(['a', 'b'], [1, 2]) results in ['a' => 1, 'b...read more
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Q1. Excel Knowledge
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Q2. Analytical Skill
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15 MCQ on reading compression

15 MCQ on logical reasoning

Q1. Tell me about yourself
Ans. 
I am a data-driven professional with a strong background in research and analysis.
• Experienced in collecting, analyzing, and interpreting data

• Proficient in using statistical software and tools

• Strong problem-solving and critical thinking skills

• Excellent communication and presentation abilities
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Q2. Why we should select you.
Ans. 
I have a strong background in data analysis, excellent communication skills, and a proven track record of delivering high-quality research results.
• Extensive experience in data analysis and research methodologies

• Strong communication skills to effectively present findings and collaborate with team members

• Proven track record of delivering high-quality research results on time and within budget
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Q1. What is the API, how its works ,what are the authentication
Ans. 
API (Application Programming Interface) enables software applications to communicate and interact with each other.
• APIs allow different software systems to exchange data and functionality.

• RESTful APIs use HTTP requests to perform CRUD operations (Create, Read, Update, Delete).

• Example: A weather API provides current weather data for a specified location.

• Authentication methods include API keys, OAuth tokens, and Basic Aut...read more
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Q2. What is PDO
Ans. 
PDO (PHP Data Objects) is a database access layer providing a uniform method of access to multiple databases in PHP.
• PDO provides a data-access abstraction layer, allowing developers to work with different databases using the same functions.

• It supports prepared statements, which help prevent SQL injection attacks. Example: $stmt = $pdo->prepare('SELECT * FROM users WHERE id = ?');

• PDO can connect to various databases ...read more
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