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Test: Data Models - 1 - Software Development MCQ


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15 Questions MCQ Test - Test: Data Models - 1

Test: Data Models - 1 for Software Development 2024 is part of Software Development preparation. The Test: Data Models - 1 questions and answers have been prepared according to the Software Development exam syllabus.The Test: Data Models - 1 MCQs are made for Software Development 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Data Models - 1 below.
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Test: Data Models - 1 - Question 1

Which of the following is NOT a characteristic of a database?

Detailed Solution for Test: Data Models - 1 - Question 1

Portability is not a characteristic of a database. Other characteristics like redundancy control, consistency, and flexibility are commonly associated with databases.

Test: Data Models - 1 - Question 2

In a relational database, what is a primary key?

Detailed Solution for Test: Data Models - 1 - Question 2

A primary key is a column or a set of columns that uniquely identifies each row in a table. It ensures data integrity and provides a way to uniquely identify records.

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Test: Data Models - 1 - Question 3

Which of the following data models represents data as a collection of objects?

Detailed Solution for Test: Data Models - 1 - Question 3

The object-oriented data model represents data as a collection of objects that have attributes and methods. It is used in object-oriented programming languages like Java and C++.

Test: Data Models - 1 - Question 4

Which of the following is NOT a level of data abstraction in a DBMS?

Detailed Solution for Test: Data Models - 1 - Question 4

The structural level is not a level of data abstraction in a DBMS. The three levels of data abstraction are physical level, logical level, and conceptual level.

Test: Data Models - 1 - Question 5

Which of the following is an advantage of the hierarchical data model?

Detailed Solution for Test: Data Models - 1 - Question 5

The hierarchical data model offers simplicity and ease of understanding as it represents data in a tree-like structure with parent-child relationships. However, it lacks flexibility compared to the relational data model.

Test: Data Models - 1 - Question 6

What will be the output of the following Python code snippet?

numbers = [1, 2, 3, 4, 5]
squared_numbers = [num ** 2 for num in numbers]
print(squared_numbers)

Detailed Solution for Test: Data Models - 1 - Question 6

The code squares each number in the list 'numbers' using a list comprehension and stores the squared values in the list 'squared_numbers'. The output will be [1, 4, 9, 16, 25].

Test: Data Models - 1 - Question 7

What will be the output of the following Python code snippet?

fruits = ['apple', 'banana', 'cherry', 'date']
print(fruits[1:3])

Detailed Solution for Test: Data Models - 1 - Question 7

The code uses list slicing to extract elements from index 1 to 3 (excluding 3) from the list 'fruits'. The output will be ['banana', 'cherry'].

Test: Data Models - 1 - Question 8

What will be the output of the following Python code snippet?

def greet(name):
    print("Hello, " + name + "!")

greet("Alice")

Detailed Solution for Test: Data Models - 1 - Question 8

The code defines a function named 'greet' that takes a parameter 'name' and prints a greeting message. The function is then called with the argument 'Alice'. The output will be "Hello, Alice!".

Test: Data Models - 1 - Question 9

What will be the output of the following Python code snippet?

numbers = [1, 2, 3, 4, 5]
even_numbers = [num for num in numbers if num % 2 == 0]
print(even_numbers)

Detailed Solution for Test: Data Models - 1 - Question 9

The code uses a list comprehension to filter even numbers from the list 'numbers' and stores them in the list 'even_numbers'. The output will be [2, 4].

Test: Data Models - 1 - Question 10

What will be the output of the following Python code snippet?

numbers = [1, 2, 3, 4, 5]
squared_numbers = [num ** 2 for num in numbers if num % 2 == 0]
print(squared_numbers)

Detailed Solution for Test: Data Models - 1 - Question 10

The code squares each even number in the list 'numbers' using a list comprehension and stores the squared values in the list 'squared_numbers'. The output will be [4, 16].

Test: Data Models - 1 - Question 11

What will be the output of the above code?

numbers = [1, 2, 3, 4, 5]
result = map(lambda x: x * 2, numbers)
print(list(result))

Detailed Solution for Test: Data Models - 1 - Question 11

The 'map' function applies the lambda function to each element in the 'numbers' list, doubling each value. The 'list' function is used to convert the map object to a list. The output will be [2, 4, 6, 8, 10].

Test: Data Models - 1 - Question 12

Consider the following Python code snippet:

def add_numbers(a, b):
    return a + b

result = add_numbers(2, 3)
print(result)

Detailed Solution for Test: Data Models - 1 - Question 12

The function 'add_numbers' takes two arguments and returns their sum. The function is called with arguments 2 and 3, resulting in a sum of 5.

Test: Data Models - 1 - Question 13

Consider the following Python code snippet:

def multiply_numbers(a, b=2):
    return a * b

result = multiply_numbers(3)
print(result)

What will be the output of the above code?

Detailed Solution for Test: Data Models - 1 - Question 13

The function 'multiply_numbers' takes two arguments, 'a' and 'b', with 'b' having a default value of 2. When only one argument, 3, is passed to the function, 'a' is set to 3 and 'b' takes its default value. The result is 3 multiplied by 2, which is 6.

Test: Data Models - 1 - Question 14

Consider the following Python code snippet:

def greet(name, greeting="Hello"):
    print(greeting + ", " + name + "!")

greet("Alice", "Hi")

What will be the output of the above code?

Detailed Solution for Test: Data Models - 1 - Question 14

The function 'greet' takes two arguments, 'name' and 'greeting', with 'greeting' having a default value of "Hello". When the function is called with arguments "Alice" and "Hi", it overrides the default value. The output will be "Hi, Alice!".

Test: Data Models - 1 - Question 15

Consider the following Python code snippet:

def calculate_sum(*numbers):
    return sum(numbers)

result = calculate_sum(1, 2, 3, 4, 5)
print(result)

What will be the output of the above code?

Detailed Solution for Test: Data Models - 1 - Question 15

The function 'calculate_sum' uses the '*numbers' syntax to accept any number of arguments and calculates their sum using the 'sum' function. The arguments 1, 2, 3, 4, and 5 are passed, resulting in a sum of 15.

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