Master Technical MCQs at Tech Mahindra | Insider Tips

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Master Technical MCQs at Tech Mahindra | Insider Tips

Table of Contents:

  1. Introduction
  2. Importance of Subscribing to the Channel
  3. Tech Mahindra Round 2: Technical Programming and Computer Science Questions
    • Language Used for System Programming
    • Symbol for Decision Node in a Programming Flowchart
    • Keyword to Define a Variable in JavaScript
    • Format of Email Address
    • Ensuring Password Security for Important Websites
    • Tool Used by Web Servers to Serve Web Pages Securely
    • Changing Background Color of an Element Using CSS
    • Command to Track a New File in Git
    • Dividing a Long Program into Smaller Functions or Procedures
    • Software Needed to Make a Peripheral Device Work with a Computer
    • Command to Change the Structure of a Database Table
    • Understanding DDL
    • Cases When DML Statement is Not Executed
    • Determining the Visual Aspect of a Web Page Separately from the Content
    • Adding Functionality by Third Parties to the Chrome Browser
    • Purpose of the No Script Tag in JavaScript
    • Declaring a Constant Data Type in JavaScript
    • Advised Approach for Creating Huge Web Pages Using CSS
    • Declaring Internal CSS in HTML
    • Establishing Direct Connections with Servers
    • Referring to a Chart with No Code and Only Function Flow
    • Uses of Algorithms and Flowcharts in Programming
    • Pseudo Code Instructions for Correct Order Sequence Logic
    • Symbol Used to Represent Output in a Flowchart
    • Causes of Runtime Errors
    • Process of Finding Errors in the Code
    • Using the For Loop to Execute Code Multiple Times
    • Loop That Never Ends
  4. Conclusion

Tech Mahindra Round 2: Technical Programming and Computer Science Questions

Tech Mahindra is known for its rigorous technical programming and computer science interview process. In order to succeed in Round 2 of the interview, it is essential to have a strong understanding of various programming concepts and computer science fundamentals. This article aims to provide You with a comprehensive guide to prepare for this round by addressing some of the most commonly asked technical questions. Let's dive in!

1. Language Used for System Programming

System programming is an essential aspect of computer science, and various languages can be used for this purpose. The most commonly used language for system programming is C. It is a versatile and powerful language that allows low-level manipulation of computer hardware and provides direct access to memory. Its efficiency and simplicity make it the preferred language for system programming tasks.

2. Symbol for Decision Node in a Programming Flowchart

A programming flowchart is a visual representation of the logical flow of a program. Decision nodes are used to represent points in the program where a decision needs to be made. In a programming flowchart, the symbol used to represent a decision node is a diamond Shape. This symbol indicates that the program should take different paths Based on a certain condition.

3. Keyword to Define a Variable in JavaScript

JavaScript is a widely used programming language for web development. To define a variable in JavaScript, you can use either the "let" or "var" keyword. These keywords are used to declare and initialize variables in JavaScript. The "let" keyword is recommended for defining block-scoped variables, whereas the "var" keyword is used for defining variables with a function scope.

4. Format of Email Address

The format of an email address typically consists of two parts: the username and the domain name. The username is the unique identifier of the email account, and the domain name represents the email service provider. In the format "name@Website.com," the username comes before the "@" symbol, and the domain name comes after it. For example, "john@example.com" is a valid email address, where "john" is the username and "example.com" is the domain name.

5. Ensuring Password Security for Important Websites

When choosing a password for an important website, there are several factors to consider to ensure its security. One effective approach is to use a very long password. By using a long password, you increase its complexity, making it harder for hackers to crack. Additionally, it is crucial to avoid using easily guessable information, such as names or birthdays, and include a combination of uppercase and lowercase letters, numbers, and special characters. It is also important to store the password in a safe place and avoid using automatic browser storage to prevent unauthorized access.

6. Tool Used by Web Servers to Serve Web Pages Securely

Web servers use a tool called HTTPS (Hypertext Transfer Protocol Secure) to maintain and serve web pages securely. HTTPS is an extension of the HTTP protocol, adding an extra layer of security through the use of SSL/TLS (Secure Sockets Layer/Transport Layer Security) encryption. This ensures that the communication between the client and server is encrypted and protects against eavesdropping or data manipulation.

7. Changing Background Color of an Element Using CSS

To change the background color of an element using CSS, you can use the "background-color" property. For example, to set the background color of a div element to red, you can use the following CSS code:

div {
  background-color: red;
}

This will Apply the red color to the background of all div elements on the web page. You can replace "red" with any valid color value or use hexadecimal or RGB values to specify a specific color.

8. Command to Track a New File in Git

Git is a popular version control system used for tracking changes in files and collaborating on software development projects. To begin tracking a new file in Git, you can use the "git add" command followed by the name of the file. For example:

git add filename

This command adds the specified file to the staging area, preparing it for the next commit. After adding the file, you can Continue making changes to it and eventually commit those changes to the repository.

9. Dividing a Long Program into Smaller Functions or Procedures

Dividing a long program into smaller functions or procedures is a recommended practice in programming. It improves the overall readability and maintainability of the code. By breaking down a program into smaller functions, you can organize the code logically and make it easier to understand and debug. Furthermore, dividing a program into smaller functions promotes code reusability and modularity, making it easier to update or modify specific parts of the program without affecting the entire codebase. This approach leads to more efficient and structured programming.

10. Software Needed to Make a Peripheral Device Work with a Computer

To make a peripheral device work with a computer, device drivers are needed. Device drivers are software programs that act as intermediaries between the peripheral device and the operating system. They provide the necessary instructions and protocols for the device to communicate effectively with the computer. Device drivers allow the operating system to recognize and utilize the functionalities of the peripheral device. Without proper device drivers, the computer may not be able to identify or use the peripheral device correctly.

11. Command to Change the Structure of a Database Table

To change the structure of a database table, you can use the "ALTER TABLE" command. This command allows you to modify various aspects of the table, such as adding or removing columns, changing the data type of columns, modifying constraints, and more. For example, to add a new column to an existing table, you can use the following SQL command:

ALTER TABLE table_name ADD column_name datatype;

This command adds a new column with the specified name and data type to the table.

12. Understanding DDL

DDL stands for Data Definition Language. It is a subset of SQL (Structured Query Language) used for creating, altering, and deleting database structures. DDL statements are used to define the structure of a database, including tables, indexes, constraints, and relationships. Common DDL statements include "Create TABLE" to create a new table, "ALTER TABLE" to modify an existing table, and "DROP TABLE" to delete a table. DDL statements are critical for defining the schema and organization of a database.

13. Cases When DML Statement is Not Executed

DML (Data Manipulation Language) statements are used to retrieve, modify, and delete data in a database. However, there are cases when a DML statement is not executed. One such case is when a table is deleted. If a table is deleted, any DML statement that operates on that table will not be executed because the table no longer exists. It is essential to handle such scenarios carefully to prevent errors and ensure the data integrity of the database.

14. Determining the Visual Aspect of a Web Page Separately from the Content

HTML (Hypertext Markup Language) is used for structuring web page content, while CSS (Cascading Style Sheets) is used for determining the visual aspect and presentation of the web page separately from the content. CSS allows web developers to specify various style properties, such as font size, color, background, layout, and more, directly in the HTML code or through external CSS files. By separating the visual aspect from the content, CSS provides flexibility in customizing the appearance of web pages while maintaining the underlying structure.

15. Adding Functionality by Third Parties to the Chrome Browser

To add functionality by third parties to the Chrome browser, plugins are used. Plugins are software components that extend the functionality of a web browser. They enable additional features, such as playing multimedia content, displaying specific file types, enhancing security, and more. Plugins can be installed and managed within the browser to tailor the browsing experience according to individual preferences.

16. Purpose of the No Script Tag in JavaScript

The no script tag in JavaScript is used to specify a section of code that should only be executed in situations where JavaScript support is disabled or not available. It serves as an alternative or fallback for users who have disabled JavaScript or have browsers that do not support it. The content within the no script tag is displayed by browsers without JavaScript support and helps ensure that essential information or functionality is still accessible to all users.

17. Declaring a Constant Data Type in JavaScript

To declare a constant data type in JavaScript, you can use the "const" keyword. The "const" keyword is used to define variables that have a constant value, meaning their value cannot be modified once assigned. Constants are useful when you want to ensure that a variable retains its initial value throughout the program and is not accidentally reassigned or modified.

18. Advised Approach for Creating Huge Web Pages Using CSS

When creating huge web pages or websites with numerous pages, it is advisable to use external CSS files. External CSS files are separate files that store CSS code and are linked to the HTML pages using the "link" tag. By using external CSS files, you can centralize the style definitions and apply them consistently across multiple web pages. This approach promotes easier code management, modularity, and scalability, as changes to the CSS can be reflected across all pages by modifying a single file.

19. Declaring Internal CSS in HTML

To declare internal CSS in HTML, you can use the "style" tag within the "head" section of the HTML document. The "style" tag is used to define CSS rules directly within the HTML document, affecting the presentation of that specific HTML page. By placing the CSS code inside the "style" tag, you can customize the styles for individual elements or classes within the HTML document, making it a more self-contained and organized approach.

20. Establishing Direct Connections with Servers

The Hypertext Transfer Protocol (HTTP) allows clients to establish direct connections with servers using the TCP (Transmission Control Protocol) protocol. TCP provides reliable, ordered, and error-checked delivery of data packets between the client and the server. It ensures that the data packets sent by the client reach the server accurately and that the server's responses are received by the client without any loss or corruption.

21. Referring to a Chart with No Code and Only Function Flow

A chart with no code and only the function flow is referred to as a flowchart. A flowchart is a visual representation of the logical flow of a program or process. It uses various symbols and shapes to represent different elements of the program, such as decision points, input/output, processes, and more. Flowcharts provide a clear and concise overview of how a program or process functions, making it easier to understand and analyze.

22. Uses of Algorithms and Flowcharts in Programming

Algorithms and flowcharts are essential tools in programming. An algorithm is a set of step-by-step instructions or rules used to solve a specific problem or perform a specific task. It provides a logical and systematic approach to problem-solving. Flowcharts, on the other HAND, visually represent the algorithm using various symbols and connectors, making it easier to understand and communicate the algorithm's flow.

Algorithms and flowcharts are used for better programming by providing a structured and organized approach to coding. They help in efficient coding by breaking down complex problems into smaller, manageable steps. Flowcharts are particularly helpful for easy debugging, as they allow programmers to identify errors or potential issues in the logical flow of a program.

23. Pseudo Code Instructions for Correct Order Sequence Logic

Pseudo code instructions are written with the steps to be taken in the correct order sequence logic. Pseudo code is an informal way of representing a program's logic using Simplified, human-readable statements. It helps programmers plan and understand the overall flow of a program without worrying about the specific syntax of a programming language. Pseudo code instructions ensure that the steps or operations are carried out in the correct order, maintaining the logical sequence of the program.

24. Symbol Used to Represent Output in a Flowchart

In a flowchart, the symbol used to represent output is a parallelogram. The parallelogram symbol indicates the point in the program where the result or output is displayed. It represents the final outcome or value produced by the program's execution. Output symbols in flowcharts help Visualize the flow of data within the program and make it easier to understand the program's logical structure.

25. Causes of Runtime Errors

Runtime errors can occur due to various factors. Logical errors in the program's code are one possible cause of runtime errors. These errors occur when the program does not produce the desired output or behaves unexpectedly due to flawed logic. Another possible cause is hardware connected improperly, where improper connections between hardware devices can lead to runtime errors. Additionally, incorrect data input can cause runtime errors if the program is not designed to handle invalid or unexpected user inputs.

26. Process of Finding Errors in the Code

The process of finding errors in the code is known as debugging. Debugging involves identifying and resolving issues, bugs, or errors in a program's code to ensure that it functions as intended. It usually involves carefully analyzing the program's behavior, examining error messages or logs, using debugging tools, and systematically tracing the code's execution to locate the source of the problem. Debugging is an essential skill for programmers to develop, as it helps in producing reliable and error-free software.

27. Using the For Loop to Execute Code Multiple Times

The for loop is a control structure used to execute a section of code multiple times within a program. It is especially useful when the number of iterations is known in advance. To use a for loop, you need to specify three things: initialization, condition, and modification. These three elements are separated by semicolons. The loop continues executing the code block until the condition evaluates to false. The for loop provides an efficient and concise way to repeat a specific set of instructions a certain number of times.

28. Loop That Never Ends

A loop that never ends is referred to as an infinite loop. An infinite loop occurs when the loop's condition always evaluates to true, preventing the loop from terminating. This can happen due to logical errors in the loop's condition or the absence of a statement that modifies the condition. Infinite loops can lead to program crashes or freezing, consuming excessive resources and preventing the execution of subsequent code. It is essential to avoid or carefully control infinite loops in programming to ensure the correct execution of the program.

Conclusion

Preparation for the technical programming and computer science questions in Tech Mahindra Round 2 can significantly increase your chances of success. By having a clear understanding of the concepts discussed in this article and practicing Relevant programming tasks, you can demonstrate your knowledge and stand out during the interview process. Remember to thoroughly study topics such as system programming, flowcharts, algorithms, JavaScript, database management, and debugging techniques to excel in this round. Best of luck with your preparation and the interview!

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