ISDS 505 – Exam 1 Questions and Correct Answers | C# Programming and Logic | 2025/2026 | Complete Practice Set

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ISDS 505 Exam 1 Questions and Correct Answers/
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Which of the following is NOT a valid C# identifier

Select one:

a. _order

b. a

c. this

d. a1

Ans: c. this


What is NOT considered a keyword by the C# language?

Select one:

a. catch

b. global

c. implicit

d. static

Ans: b. global


In Object-oriented programming language, the ability to create methods that act
appropriately depending on the context is called _________.

Select one:

a. inheritance

b. encapsulation



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c. instance

d. polymorphism

Ans: d. polymorphism


in "using System;", what is "System" referring to?

Select one:

a. class

b. variable

c. namespace

d. method

Ans: c. namespace


Which of the following pairs is an example of a class and an object, in that order?

Select one:

a. animal and bear

b. cup and glass

c. CSUF and university

d. car and vehicle

Ans: a. animal and bear


What is the value of the expression 3+4*2 ?

Select one:

a. 10



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b. 11

c. 5

d. 14

Ans: b. 11


What is the value of 5>=3?

Select one:

a. 1

b. 0

c. false

d. true

Ans: d. true


In C#, you use the ____ data type to hold a series of characters.

Select one:

a. string

b. int

c. sbyte

d. char

Ans: a. string


Assume you have a variable declared as int var1=5; What is the value of 27%var1
?

Select one:

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a. 5

b. 2

c. 4

d. 0

Ans: b. 2


Assume that you declared a double variable called unitPrice which is used to get
an item's unit price. Which of the following will display the unit price in a
currency format with 2 decimal places?

Select one:

a. Console.WriteLine(unitPrice.ToString());

b. Both Console.WriteLine(unitPrice.ToString("C")); and
Console.WriteLine(unitPrice.ToString("C2"));

c. Console.WriteLine(unitPrice.ToString("C"));

d. Console.WriteLine(unitPrice.ToString("C2"));

Ans: b. Both Console.WriteLine(unitPrice.ToString("C")); and
Console.WriteLine(unitPrice.ToString("C2"));


Programming languages such as C#, Java, and Visual Basic are
____________________languages.

a. machine

b. high-level

c. low-level

d. uninterpreted



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