Practice Databases Questions Now
Start a timed practice session focusing on Database Fundamentals topics from the TECHPLUS question bank.
Start TECHPLUS Practice Quiz →TECHPLUS Databases Question Bank (9 Questions)
Browse all 9 practice questions covering Database Fundamentals for the TECHPLUS certification exam. Each question includes the full answer and a detailed explanation to help you understand the concepts.
- Question 1Data & Database Fundamentals
What is a primary key in a relational database?
Show Answer & Explanation
Correct Answer: BExplanation:A primary key is a column (or combination of columns) that uniquely identifies each record in a table. It must contain unique values and cannot be NULL. It is not necessarily the first column.
- Question 2Data & Database Fundamentals
Which of the following is a characteristic of NoSQL databases?
Show Answer & Explanation
Correct Answer: CExplanation:NoSQL databases offer flexible schemas, allowing storage of unstructured, semi-structured, or structured data without requiring a predefined rigid schema. They often scale horizontally and use various query methods beyond SQL.
- Question 3Data & Database Fundamentals
What is a foreign key in a relational database?
Show Answer & Explanation
Correct Answer: BExplanation:A foreign key is a column in one table that references the primary key of another table, establishing a relationship between the two tables. It enforces referential integrity between related data.
- Question 4Select All That ApplyData & Database Fundamentals
Which of the following are types of NoSQL databases? (Choose two.)
Show Answer & Explanation
Correct Answers: A, CExplanation:Document stores (like MongoDB) and key-value stores (like Redis) are two common types of NoSQL databases. Others include column-family stores and graph databases. Relational and spreadsheet stores are not NoSQL types.
- Question 5Data & Database Fundamentals
Which SQL statement is used to retrieve data from a database table?
Show Answer & Explanation
Correct Answer: CExplanation:The SELECT statement retrieves (queries) data from one or more database tables. INSERT adds new records, UPDATE modifies existing records, and DELETE removes records from a table.
- Question 6Data & Database Fundamentals
Which database data type would be most appropriate for storing a product price of $19.99?
Show Answer & Explanation
Correct Answer: CExplanation:DECIMAL (or NUMERIC) is the appropriate type for monetary values as it stores exact decimal numbers without floating-point rounding errors. INTEGER cannot store decimals, VARCHAR is for text, and BOOLEAN is for true/false.
- Question 7Data & Database Fundamentals
What is a database schema?
Show Answer & Explanation
Correct Answer: BExplanation:A database schema defines the logical structure of the database: tables, columns, data types, relationships, constraints, and indexes. It describes how data is organized, not the data itself.
- Question 8Data & Database Fundamentals
What is the purpose of a database backup?
Show Answer & Explanation
Correct Answer: BExplanation:Database backups create copies of data that can be restored if the original data is lost due to hardware failure, corruption, accidental deletion, or disaster. Regular backups are essential for data recovery.
- Question 9Data & Database Fundamentals
What does normalization mean in database design?
Show Answer & Explanation
Correct Answer: BExplanation:Database normalization is the process of organizing tables and columns to minimize data redundancy and prevent insertion, update, and deletion anomalies. It divides data into related tables linked by keys.
Key Databases Concepts for TECHPLUS
TECHPLUS Databases Exam Tips
Database Fundamentals questions in TECHPLUS are typically scenario-based. Focus on service-level decision making aligned to official exam objectives. Priority concepts: database, sql, relational, nosql, data, queries.
What TECHPLUS Expects
- Anchor your answer in select the most practical, secure, and scalable answer for the stated scenario.
- Databases scenarios for TECHPLUS are frequently mapped to Domain 4 (11%), so read the objective carefully before picking controls or architecture.
- Expect multi-service scenarios where Databases interacts with IAM, networking, storage, or observability patterns rather than appearing as an isolated service question.
- When two options are both technically valid, prefer the choice that best aligns with the exam's operational scope (Entry) and managed-service best practices.
High-Value Databases Concepts
- Know the core Databases building blocks cold: database, sql, relational, nosql.
- Review the edge-case features and limits for data, queries; these details are commonly used to differentiate answer choices.
- Practice service-integration reasoning: how Databases pairs with Software Development, IT Concepts in real deployment patterns.
- For TECHPLUS, explain why the chosen Databases design meets reliability, security, and cost expectations better than the alternatives.
Common TECHPLUS Traps
- Watch for answers that partially solve the requirement but miss operational constraints.
- Questions in Database Fundamentals often include distractors that look correct for Databases but violate least-privilege, durability, or availability requirements.
- Avoid picking options purely by feature name; validate data path, failure handling, and governance impact before answering.
- If the prompt hints at automation or repeatability, eliminate manual-only operational answers first.
Fast Review Checklist
- Can you compare at least two Databases implementation paths and justify which one best fits the scenario?
- Can you map the chosen answer back to Database Fundamentals (11%) outcomes for TECHPLUS?
- Can you explain security and access boundaries for Databases without relying on default-open assumptions?
- Can you describe how Databases integrates with Software Development and IT Concepts during failure, scaling, and monitoring events?