Back
0

Basic C# .Net Quiz 2

Description: Basic C# Quiz 2
Number of Questions: 15
Created by:
Tags: .net c-sharp
Start the Quiz
Attempted 0/15 Correct 0 Score 0
‹
›

To output the value of multidimensional array, Console.WriteLines(___)
.net c-sharp

  1. myArray[1][3];

  2. myArray[1,3];

  3. myArray{1}{3};

  4. myArray(1),(3);

Show answer
Correct Option: B
Explanation:

To output the value of a multidimensional array, you need to provide the indices for each dimension of the array. Let's go through each option and determine if it correctly outputs the value of a multidimensional array:

A. myArray[1][3]; This option is incorrect because it uses the wrong syntax to access the value of a multidimensional array. In C#, the correct syntax to access a value in a multidimensional array is myArray[1,3], not myArray[1][3]. The correct syntax uses commas to separate the indices for each dimension.

B. myArray[1,3]; This option is correct. It uses the correct syntax to access the value of a multidimensional array. The comma is used to separate the indices for each dimension, and this syntax correctly outputs the value at index 1 in the first dimension and index 3 in the second dimension of the array.

C. myArray{1}{3}; This option is incorrect because it uses curly braces instead of square brackets to access the value of the multidimensional array. In C#, square brackets [] are used to access array elements, not curly braces {}.

D. myArray(1),(3); This option is incorrect because it uses parentheses instead of square brackets to access the value of the multidimensional array. In C#, square brackets [] are used to access array elements, not parentheses ().

Therefore, the correct option is B. myArray[1,3].

All methods in an abstract base class must be declared abstract.
.net c-sharp

  1. True

  2. False

Show answer
Correct Option: B

Methods that are declared abstract in the base class must show implementation at the time of declaration.
.net c-sharp

  1. True

  2. False

Show answer
Correct Option: B

The code public class B : A { }
.net c-sharp

  1. Defines a class that inherits all the methods of A

  2. Defines a class that inherits the public and protected methods of A only

  3. Errors

  4. a and b

Show answer
Correct Option: B

Assuming that public class B : A { public B(int i) :base(i) { } } compiles and runs correctly, what can we conclude about the constructors in the class A?
.net c-sharp

  1. One constructor takes an argument of type i

  2. There is only a default constructor

  3. One constructor takes an arguments of the type int

  4. a and b

Show answer
Correct Option: C

A Thread is:
.net c-sharp

  1. an object that allows computer multitasking

  2. an object that wraps itself with other threads

  3. a deprecated object that is no longer used

Show answer
Correct Option: A

Synchronization is:

.net c-sharp

  1. the delaying of a thread until there is sufficient memory and work to keep it up

  2. making every thread start and end at the same time

  3. make each thread do the same thing

  4. have each thread start at the same time but not necessarily finish together

  5. wait until the required resources, that are used by other threads become available

Show answer
Correct Option: E

AI Explanation

To answer this question, we need to understand the concept of synchronization in the context of threads.

Synchronization is a mechanism used in concurrent programming to control the access to shared resources by multiple threads. It ensures that only one thread can access a shared resource at a time, preventing data inconsistencies and race conditions.

Let's go through each option to understand why it is correct or incorrect:

Option A) the delaying of a thread until there is sufficient memory and work to keep it up This option does not accurately describe synchronization. Synchronization is not related to memory availability or workload.

Option B) making every thread start and end at the same time This option does not accurately describe synchronization. Synchronization is not about controlling the starting and ending times of threads.

Option C) make each thread do the same thing This option does not accurately describe synchronization. Synchronization is about coordinating the access to shared resources, not making threads do the same thing.

Option D) have each thread start at the same time but not necessarily finish together This option partially describes synchronization, but it is not complete. Synchronization is not only about starting threads at the same time; it also involves coordinating access to shared resources.

Option E) wait until the required resources, that are used by other threads, become available This option accurately describes synchronization. Synchronization involves waiting for the required resources to become available before accessing them to prevent data inconsistencies.

The correct answer is E) wait until the required resources, that are used by other threads, become available. This option accurately describes the concept of synchronization in the context of concurrent programming.

In C# Thread.Sleep(time) measures time in:
.net c-sharp

  1. seconds

  2. milliseconds

  3. nanoseconds

  4. all of the above

Show answer
Correct Option: B

When a thread returns from a WaitSleepJoin or Suspended state it returns to the:
.net c-sharp

  1. Unstarted state

  2. Stopped state

  3. Started state (now considering a part of the running state)

  4. Resume state

Show answer
Correct Option: C

The ThreadPriority enumeration does not contain:
.net c-sharp

  1. Lowest

  2. Highest

  3. BelowNormal

  4. None of the above

Show answer
Correct Option: D

String indexers treat strings as:

.net c-sharp

  1. binary code

  2. 1 to string Length

  3. arrays of characters

  4. a character

Show answer
Correct Option: C
Explanation:

To solve this question, the user needs to know the concept of string indexers.

String indexers treat strings as arrays of characters, where each character in the string is assigned an index value based on its position.

Option A is incorrect because string indexers do not treat strings as binary code.

Option B is incorrect because the index values assigned to characters in a string do not start from 1 and go up to the length of the string. They start from 0 and go up to length-1.

Option C is correct because string indexers treat strings as arrays of characters.

Option D is incorrect because a string is made up of multiple characters, not just one.

Therefore, the correct answer is: C. arrays of characters.

If an IndexofAny method is passed an array of characters it:

.net c-sharp

  1. finds the first occurrence of each letter in the string

  2. searches for the first occurrence of any of the characters in the string

  3. will search for the first occurrence of the sequence of characters

  4. generates an error

Show answer
Correct Option: B

Concatenating with strings are done with:

.net c-sharp

  1. reserved words

  2. method calls

  3. operator overloading

  4. operator overloading and method calls

Show answer
Correct Option: D

If two StringBuilder objects contain the same string then

.net c-sharp

  1. they represent the same meory location

  2. the are two different objects

  3. if one changes, so will the other

  4. None of the above

Show answer
Correct Option: B

AI Explanation

To answer this question, you need to understand how StringBuilder objects work.

StringBuilder objects in Java are mutable, which means their values can be changed. When you create a StringBuilder object and assign it a specific string, you can modify the content of that object without creating a new object.

Now, let's go through each option to understand why it is correct or incorrect:

Option A) They represent the same memory location - This option is incorrect. StringBuilder objects are separate objects that can have the same content but are stored in different memory locations.

Option B) They are two different objects - This option is correct. If two StringBuilder objects contain the same string, they are still considered as separate objects. They have their own memory locations and can be modified independently.

Option C) If one changes, so will the other - This option is incorrect. If you modify the content of one StringBuilder object, it will not affect the other StringBuilder object, even if they contain the same string.

Option D) None of the above - This option is incorrect. Option B is the correct answer because StringBuilder objects with the same string content are still separate objects.

Therefore, the correct answer is B) They are two different objects.

The proper way to convert a string to all lowercase is:

.net c-sharp

  1. String = string.ToLower(string);

  2. ToLower(string);

  3. string.ToLower();

  4. string.ToLower(string);

Show answer
Correct Option: C
- Hide questions
ADVERTISEMENT

Find more quizzes from top tags

general knowledge
3615 Quizzes
119858 Questions
 technology
307 Quizzes
36705 Questions
 sports
963 Quizzes
19148 Questions
 history
1187 Quizzes
13475 Questions
 physics
598 Quizzes
13441 Questions
 biology
1160 Quizzes
12174 Questions
 science & technology
551 Quizzes
11015 Questions
 chemistry
490 Quizzes
9892 Questions
 maths
518 Quizzes
9324 Questions
 softskills
0 Quizzes
7131 Questions