Mettl Technical Aptitude 2 — Questions and Answers

Question 1: In networking, what does 'HTTP' stand for and what is its primary function?

High Transfer Text Protocol — for file compression
HyperText Transfer Protocol — for transferring web pages and data over the internet (Correct answer)
Host Terminal Transfer Program — for server management
Hybrid Text Transport Protocol — for encrypted communications

Correct answer: HyperText Transfer Protocol — for transferring web pages and data over the internet

HTTP (HyperText Transfer Protocol) is the foundation of data communication on the World Wide Web, enabling browsers to request and receive web pages.

HTTP (HyperText Transfer Protocol) is an application-layer protocol for transmitting hypermedia documents. Key concepts: HTTP is stateless (each request is independent), operates on port 80, HTTPS (encrypted version) uses port 443 with SSL/TLS, HTTP methods: GET (retrieve), POST (send data), PUT (update), DELETE (remove). HTTP/2 and HTTP/3 offer performance improvements over HTTP/1.1. Technical aptitude questions on Mettl for IT/tech roles frequently include networking fundamentals like protocols, ports, and client-server architecture.

Question 2: What is the primary purpose of an API (Application Programming Interface)?

To design user interfaces for applications
To enable different software applications to communicate and share data (Correct answer)
To store application data in databases
To encrypt network traffic between servers

Correct answer: To enable different software applications to communicate and share data

An API defines rules and protocols for how software components communicate, allowing applications to exchange data and functionality.

An API (Application Programming Interface) is a set of definitions and protocols for building and integrating application software. It allows: Different applications to communicate (e.g., a weather app using a weather data API), Developers to use pre-built functionality without knowing the implementation, Systems to share data securely. Common types: REST APIs (web services), SOAP APIs (enterprise), GraphQL APIs (flexible queries). Real-world example: When you log in with Google on a third-party app, the app uses Google's OAuth API. Mettl technical aptitude tests for developer and IT roles frequently assess API knowledge.

Question 3: In a spreadsheet (Excel/Google Sheets), which formula calculates the sum of values in cells A1 to A10?

=TOTAL(A1:A10)
=SUM(A1:A10) (Correct answer)
=ADD(A1,A10)
=CALCULATE(A1:A10)

Correct answer: =SUM(A1:A10)

=SUM(A1:A10) is the standard Excel/Google Sheets formula to add all values in the range A1 through A10.

Microsoft Excel and Google Sheets use the same basic formula syntax: =SUM(range) for addition. Common formulas: =SUM(A1:A10) — total values in range, =AVERAGE(A1:A10) — mean of range, =COUNT(A1:A10) — count non-empty cells, =IF(condition, value_if_true, value_if_false) — conditional, =VLOOKUP(lookup_value, table_array, col_index, [match_type]) — vertical lookup. Spreadsheet proficiency is tested in Mettl assessments for analyst, operations, finance, and general business roles as it's a fundamental workplace skill.

Question 4: What does 'RAM' stand for and what is its primary function in a computer?

Random Access Memory — stores data temporarily for active processes (Correct answer)
Read-Only Application Memory — stores the operating system permanently
Rapid Action Module — speeds up processor calculations
Remote Access Module — enables network connectivity

Correct answer: Random Access Memory — stores data temporarily for active processes

RAM (Random Access Memory) is the computer's short-term memory, temporarily storing data that the CPU is actively using for fast access.

RAM (Random Access Memory) is volatile memory — it stores data only while powered. Functions: Holds actively running applications and their data, enables the CPU to access information quickly (much faster than HDDs/SSDs), determines how many programs can run simultaneously. More RAM = better multitasking. Contrast: ROM (Read-Only Memory) is non-volatile, stores BIOS/firmware permanently. SSD/HDD stores data permanently but is slower than RAM. Hierarchy: CPU Cache (fastest) → RAM → SSD → HDD (slowest). Basic computer hardware knowledge is tested in Mettl technical aptitude assessments for IT support and non-developer technical roles.

Question 5: In project management software, 'Gantt chart' is best used for:

Tracking individual employee performance
Visualizing project timeline with task durations and dependencies (Correct answer)
Monitoring server uptime and performance
Calculating project budget allocation

Correct answer: Visualizing project timeline with task durations and dependencies

Gantt charts display project tasks along a timeline, showing start/end dates, duration, and task dependencies — essential for project scheduling.

Gantt charts (developed by Henry Gantt, 1910s) are horizontal bar charts representing: Task names (Y-axis), Timeline/dates (X-axis), Bar length = task duration, Arrows = task dependencies (Task B can't start until Task A finishes), Milestones = key deadlines or deliverables. Used in: Construction, software development, event planning, manufacturing. Tools: Microsoft Project, Asana, Jira, Monday.com, Smartsheet. Critical Path Method (CPM) analysis uses Gantt charts to identify which tasks are critical to meeting the project deadline. Mettl assessments for project management roles test Gantt chart interpretation and project scheduling concepts.

Question 6: What is 'cloud computing' in the context of IT infrastructure?

A type of network cable used in data centers
Delivering computing services (servers, storage, software) over the internet on-demand (Correct answer)
A weather monitoring system for IT equipment
Software installed locally on personal computers

Correct answer: Delivering computing services (servers, storage, software) over the internet on-demand

Cloud computing delivers IT resources (servers, storage, databases, software) over the internet, allowing on-demand access without owning physical hardware.

Cloud computing service models: IaaS (Infrastructure as a Service): virtual machines, storage (e.g., AWS EC2, Azure VMs). PaaS (Platform as a Service): development environment (e.g., Google App Engine, Heroku). SaaS (Software as a Service): ready-to-use apps (e.g., Gmail, Salesforce, Microsoft 365). Deployment models: Public (AWS, Azure, Google Cloud), Private (company-owned), Hybrid (mix). Benefits: Scalability (scale up/down on demand), Cost efficiency (pay per use), Reliability (built-in redundancy), Accessibility (access from anywhere). Mettl technical aptitude assessments cover cloud computing concepts for IT roles in modern organizations.

Mettl Technical Aptitude 2

In networking, what does 'HTTP' stand for and what is its primary function?