Your team decides to enforce a linear history on the main branch. Which Git feature would be most appropriate to achieve this?
- merge
- rebase
- squash
- cherry-pick
The correct option is rebase. Rebasing helps create a linear history by incorporating changes from one branch onto another, eliminating unnecessary merge commits. This promotes a cleaner and more straightforward history, especially on the main branch.
What is the primary purpose of a version control system?
- A version control system is used for code collaboration.
- A version control system is used for debugging code.
- A version control system is used for file backup.
- A version control system is used for tracking changes in code.
The primary purpose of a version control system, like Git, is to track changes in code and manage different versions of files. It allows developers to collaborate, review changes, and revert to previous versions if needed.
In DevOps practices, how is Git typically used for source code management?
- Version Control
- Continuous Integration
- Continuous Deployment
- All of the Above
Git is primarily used as a Version Control System in DevOps practices to track changes, collaborate, and maintain a history of codebase modifications.
How do you update a Git Submodule to the latest commit in its repository?
- git submodule update --remote
- git submodule sync
- git submodule fetch
- git submodule pull
To update a Git Submodule to the latest commit in its repository, you use the command git submodule update --remote. This command fetches the latest changes from the submodule's repository and updates the working directory to the new commit.
git _______ is used to view the specific changes introduced in a commit.
- log
- show
- diff
- inspect
The correct option is "c) diff." The git diff command is used to show the changes between the working directory and the specified commit. It provides a line-by-line comparison of what was added, modified, or deleted.
The function signature in C++ includes the function name and the _______.
- return type
- class name
- library
- parameters
A function signature in C++ is determined by its name and its parameter list. The return type is not considered a part of the function's signature.
Which of the following is not a type of iterator in C++ STL?
- Random access
- Bidirectional
- Dynamic
- Forward
The C++ STL provides several types of iterators like random access, bidirectional, and forward iterators. However, there is no iterator type named "Dynamic." Iterators are powerful tools in STL, allowing operations like traversal, reading, and writing to elements of container objects.
The result of 5.5 + 2.5 in C++ is _______.
- 8
- 7.5
- 8
- 7
In C++, the addition of two floating-point numbers (like 5.5 and 2.5) will result in another floating-point number, which is 8.0 in this case.
The function _______ is used to merge two sorted ranges in the C++ STL.
- combine
- concatenate
- merge
- join
The merge algorithm in C++ STL is used to merge two sorted ranges into a single, sorted range. Both input ranges should be sorted for the merge algorithm to work correctly.
You are working on a large-scale application with multiple developers. One of your responsibilities is to design a library of functions to perform common tasks. What considerations might guide your decisions on when to use inline functions and default arguments?
- Only use default arguments to ensure backward compatibility.
- Use inline functions for all small computations irrespective of frequency.
- Use inline functions selectively based on performance metrics.
- Apply default arguments to simplify function calls.
When designing a library for a large-scale application, inline functions should be used selectively, especially when performance metrics indicate a clear benefit. Meanwhile, default arguments can simplify function calls but should be used judiciously to maintain clarity.
You are developing a high-frequency trading system where performance is critical. Which data type should be chosen to store price data to ensure both performance and precision?
- int
- double
- char
- long double
In high-frequency trading, price data often requires floating-point precision due to fractional values. The double datatype strikes a balance between precision and performance. While long double offers more precision, it can be slower and is overkill for most financial data.
What is the behavior of a continue statement inside a while loop?
- It skips to the next iteration of the loop immediately.
- It breaks out of the loop.
- It restarts the loop from the very beginning.
- It throws an exception.
The continue statement inside loops, including a while loop, causes the program to skip any code following it in the current iteration and jump to the next iteration. It doesn't break out of the loop but just moves to the evaluation of the loop's condition for the next iteration.