Introduction-to-IT Dumps & Introduction-to-IT Praxisprüfung
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WGU Introduction-to-IT Prüfungsplan:
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Introduction-to-IT Musterprüfungsfragen - Introduction-to-ITZertifizierung & Introduction-to-ITTestfagen
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WGU Introduction to IT Introduction-to-IT Prüfungsfragen mit Lösungen (Q101-Q106):
101. Frage
A programmer needs to create a variable that holds a wire length rounded to the nearest tenth. What is the name of the data type that should be used?
Antwort: B
Begründung:
A wire length rounded to the nearest tenth requires a numeric type that can store fractional values, such as 2.3 meters or 15.7 centimeters. In programming and database systems, floating-point data types are designed to represent real numbers that include decimal portions. This makes floating point the appropriate choice for measurements, scientific values, averages, and any quantity where partial units are meaningful. Using an integer would lose the fractional component because integers store only whole numbers, which would make the rounded-to-the-tenth requirement impossible to preserve. Character and character string types store text symbols rather than numeric quantities intended for arithmetic and comparisons. In Information Technology curricula, floating-point types are often introduced alongside integers to highlight the difference between counting values and measurement values. Although some databases prefer fixed-point decimal types for financial precision, for a physical measurement like wire length, floating point is commonly accepted and matches the options provided. Therefore, the correct data type for a wire length rounded to the nearest tenth is floating point.
102. Frage
One database field needs to be restricted to only those values that are single alphanumeric symbols. Which data type should be used?
Antwort: B
Begründung:
A field restricted to single alphanumeric symbols should use the character data type because it is designed to store exactly one character. Alphanumeric symbols include letters A through Z and digits 0 through 9, and these are naturally represented as individual characters. In Information Technology and database systems, selecting a character type allows the designer to enforce a fixed length of one, which helps maintain data integrity by preventing longer entries. An integer type is used for whole numbers and would not properly handle letters, while floating point is for decimal values and is also inappropriate for single symbols. A character string type can store multiple characters, which would allow inputs longer than one symbol unless additional constraints are applied. Using the character type is therefore the most direct and standard approach for storing one letter or digit, such as a middle initial, a grade code, or a single-character category label.
Therefore, the correct data type is character.
103. Frage
What does the following SQL statement produce when executed?
SELECT * FROM Customers
WHERE State = 'Arizona';
Antwort: A
Begründung:
The SQL statement provided is a SELECT query that retrieves data from a table within a database. Here's a breakdown of the statement:
*SELECT *: This part of the query specifies that all columns from the specified table should be returned in the result set.
*FROM Customers: This indicates that the table from which to retrieve the data is named 'Customers'.
*WHERE State = 'Arizona': This is a condition that filters the results to only include rows where the 'State' column contains the value 'Arizona'.
Therefore, when this SQL statement is executed, it will produce a result set that includes all columns for all records in the 'Customers' table where the 'State' is 'Arizona'.
References
*SQL documentation on SELECT statements.
*Database management textbooks and online resources that cover SQL syntax and query execution.
104. Frage
A programmer is working with C. Which type of language is this?
Antwort: D
Begründung:
C is commonly classified as a compiled programming language. In Information Technology curricula, C source code is typically processed by a compiler that translates the entire program into machine code or into object files that are linked into an executable. This compiled output can then be run directly by the operating system without requiring the original source code to be translated again each time. C is considered a high- level language compared with assembly and machine language, but it still provides relatively low-level control over memory and system resources through pointers and direct data structure manipulation. This makes it popular for systems programming, operating systems, embedded development, and performance- critical applications. Interpreted languages are usually executed through an interpreter at runtime, while machine language is binary code executed directly by the CPU, and assembly language uses mnemonic instructions that map closely to machine operations. Since C is normally translated ahead of time into executable code, it is best categorized as a compiled language. Therefore, the correct answer is compiled.
105. Frage
Which type of conversion involves turning off the old system and turning on the new system at a particular date and time?
Antwort: A
Begründung:
In this approach, users stop using the old system, and the new system is put into use immediately1. However, direct conversion can be risky, especially without extensive testing beforehand2.
References
1.W3computing.com
2.Universal CPA Review
106. Frage
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