Pass Introduction-to-IT Exam Guide

To calculate a percentage of a price, you need a data type that can handle decimal values, as the result may not be a whole number. Here’s why a floating-point data type is appropriate:

1.Precision: Floating-point data types are designed to handle numbers that have a fractional part, which is essential for representing percentages accurately.

2.Calculation: When calculating 90% of a retail price, you multiply the price by 0.9. This operation requires a data type that can represent both the price and the resulting product with decimal precision.

3.Storage: Floating-point types can store a wide range of values with precision, making them suitable for financial calculations where the exact amount matters.

The other options are not suitable for the following reasons:

•A. Boolean: Can only represent two values, true or false.

•C. Auto-number: Typically used for unique identifiers and cannot represent fractional values.

•D. String: While it can represent a number as text, it is not suitable for calculations without conversion, which is inefficient and error-prone.

•Verified Answer: IT allows businesses to have a global reach.

•Explanation: Information Technology enables companies to connect and operate on an international scale, facilitating global communication, transactions, and collaboration123.

•References: 123

Therefore, the correct answer is B. IT allows businesses to have a global reach.

Boolean data represents a logical value with only two possible states, typically true or false. In Information Technology, Boolean types are foundational for conditions, comparisons, control flow, and database fields that store yes-or-no style information. The example, “Whether a number is positive or not,” fits Boolean data because the statement can be evaluated as true if the number is greater than zero, or false otherwise. This two-state characteristic is exactly what defines Boolean logic. The other options describe different data types: the first letter of a last name is a character, a full last name is a character string, and the price of gas in dollars and cents is numeric with decimals, typically stored as a floating-point or fixed-point decimal type. Boolean fields are widely used in systems for flags such as active or inactive, approved or not approved, and eligible or not eligible. Therefore, the correct example of Boolean data is whether a number is positive or not.

An interpreter translates and executes source code one line at a time. In Information Technology, interpretation is a method of program execution where each statement is read, translated into machine-level actions, and executed immediately. This allows programmers to test and debug quickly because errors are often reported at the line where execution stops. Many scripting languages and interactive environments use interpreters, supporting rapid development and flexibility. Unlike a compiler, which translates the entire program into a machine code file that can be executed later, an interpreter generally requires the source code or intermediate representation to be present at runtime. An assembler is used for assembly language and converts mnemonic instructions into machine code, but it is not typically described as executing source code one line at a time. The operating system manages system resources and provides services, but it is not the tool that translates programming language source code into machine language during execution. Therefore, the correct answer for translating and executing code line by line is interpreter.