In Kubernetes, a _______ is a group of one or more containers, with shared storage/network resources, and a specification for how to run the containers.
- Deployment
- Node
- Pod
- Service
In Kubernetes, a "Pod" is a group of one or more containers that share the same network and storage resources. It provides a way to organize and manage containers within the Kubernetes environment.
The "Sources" tab in Browser Developer Tools is used for debugging _______ code.
- CSS
- HTML
- JavaScript
- Python
The "Sources" tab in Browser Developer Tools is used for debugging JavaScript code. It allows developers to inspect and debug their JavaScript code directly within the browser.
What is a binary search tree?
- A binary tree where each node has at most two children, and each node's left child is less than the node, and the right child is greater.
- A tree where each node has exactly two children, regardless of their values.
- A tree where each node's value is equal to its depth in the tree.
- A tree with only two nodes: root and leaf.
A binary search tree (BST) is a binary tree where each node has at most two children. The key property is that each node's left child must have a value less than the node, and the right child must have a value greater. This allows for efficient searching, insertion, and deletion of elements.
Discuss the role of query rewriting in query optimization strategies.
- Query rewriting involves changing the syntax of a query without altering its semantics to achieve better performance.
- Query rewriting is an obsolete technique and is no longer used in modern query optimization strategies.
- Query rewriting is primarily used for security purposes and does not impact query optimization.
- The role of query rewriting is limited to NoSQL databases and is not applicable to relational databases.
Query rewriting is a key component of query optimization, involving the transformation of queries to more efficient forms while preserving their meaning.
Data profiling helps identify _______ issues and inconsistencies in data sets.
- Formatting
- Integrity
- Quality
- Structural
Data profiling is a process that examines and analyzes data to identify quality issues, ensuring the data's accuracy, completeness, and consistency. It helps in maintaining data quality standards.
In database systems, an effective _______ strategy is crucial for query optimization.
- Caching
- Retrieval
- Sorting
- Storage
In database systems, an effective caching strategy is crucial for query optimization. Caching involves storing frequently accessed data in memory, reducing the need to retrieve it from the disk and improving query performance.
Security _______ involve scanning systems for vulnerabilities and weaknesses.
- Assessments
- Audits
- Breaches
- Incidents
Security assessments involve scanning systems for vulnerabilities and weaknesses. This proactive approach helps identify potential security risks and allows organizations to implement measures to strengthen their overall security posture.
The _______ command is used to view the commit history in Git.
- git branch
- git diff
- git log
- git status
The git log command is used to view the commit history in Git. It displays a chronological list of commits, showing details such as commit messages, author, date, and commit SHA.
What is the correct syntax for declaring a variable in JavaScript?
- declare x = 10;
- var x = 10;
- variable x = 10;
- x = 10;
The correct syntax for declaring a variable in JavaScript is var x = 10;. This syntax uses the var keyword to declare a variable named x and assigns the value 10 to it.
The "P" in ACID stands for _______.
- Persistence
- Processing
- Properties
- Protection
In ACID (Atomicity, Consistency, Isolation, Durability), the "P" stands for Persistence. It ensures that once a transaction is committed, its effects are permanent and survive subsequent system failures.
The process of automatically deploying changes to a staging environment for testing is known as Continuous _______.
- Delivery
- Deployment
- Integration
- Testing
The process of automatically deploying changes to a staging environment for testing is known as Continuous Deployment. It ensures that the changes are thoroughly tested in a controlled environment before being released to production.
The _______ pattern is commonly used for centralized log aggregation in cloud-native environments.
- Adapter
- Facade
- Observer
- Sidecar
The Sidecar pattern is commonly used for centralized log aggregation in cloud-native environments. In this pattern, a separate process or container (the sidecar) is responsible for collecting and forwarding logs, allowing for better scalability and independence of logging concerns.