FC0-U61 Software Development Concepts — Timed 10 Questions

Question 1

A junior developer is tasked with fixing a bug where a variable is unexpectedly undefined. The developer suspects the variable is not within scope. Which programming concept describes where a variable can be accessed?

Accepted Answer

Scope. Scope is the programming concept that defines the region of code where a variable is accessible. If a variable is unexpectedly undefined, it is often because it was declared outside the current block or function, making it out of scope. In JavaScript, for example, variables declared with `let` or `const` inside a block are not accessible outside that block.

Answer

Loop

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Data type

Answer

Function

Question 2

A development team is using version control for their project. They need to isolate a new feature from the main codebase until it is complete. Which version control operation should they perform?

Accepted Answer

Branch. Branching creates a separate line of development within a version control system (e.g., Git, Mercurial), allowing the team to work on a new feature in isolation without affecting the main codebase (often called 'main' or 'master'). Once the feature is complete and tested, the branch can be merged back. This directly addresses the requirement to isolate work until it is finished.

Answer

Merge

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Commit

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Push

Question 3

A software application is experiencing performance degradation. The team suspects a memory leak. Which development practice should be used to identify the source of the leak?

Accepted Answer

Profiling. Profiling is the correct practice because it involves monitoring the application's runtime behavior, including memory allocation and garbage collection. A memory profiler can track object creation and retention, pinpointing which objects are not being released and causing the leak. This is the standard approach for diagnosing memory leaks in languages like Java or C#.

Answer

Unit testing

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Debugging

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Code review

Question 4

A developer needs to store a list of employee names. Which data structure is most appropriate?

Accepted Answer

Array. An array is the most appropriate data structure for storing a list of employee names because it allows multiple values (strings) to be stored in a single, ordered collection. Unlike a single string, which holds only one value, an array can hold many strings and provides indexed access to each element, making it ideal for lists of items.

Answer

String

Answer

Boolean

Answer

Integer

Question 5

A web application is not responding to user input. The developer checks the code and finds an infinite loop. Which change will fix the infinite loop?

Accepted Answer

Add a counter variable that increments and check it in the condition. Option C is correct because an infinite loop occurs when the loop's termination condition is never met. By adding a counter variable that increments with each iteration and checking it in the condition, the loop will eventually exit when the counter reaches a specified limit, thus breaking the infinite loop.

Answer

Remove the loop body

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Add a break statement

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Change from a for loop to a while loop

Question 6

A team is developing a new feature using an Agile methodology. The product owner wants to see a working version of the feature after each iteration. Which practice best supports this request?

Accepted Answer

Continuous integration. Continuous integration (CI) is the practice of automatically merging and testing code changes frequently, often multiple times per day. This ensures that after each iteration (sprint), the team has a working, integrated version of the feature, directly supporting the product owner's request to see a functional build. CI relies on automated builds and tests to catch integration issues early, enabling rapid feedback and delivery.

Answer

Code review

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Refactoring

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Writing comprehensive documentation

Question 7

A developer needs to repeat a set of instructions exactly 10 times. Which programming construct should be used?

Accepted Answer

For loop. A for loop is the correct construct because it is specifically designed to execute a block of code a predetermined number of times, such as exactly 10 iterations. The loop's initialization, condition, and increment/decrement components allow precise control over the repetition count, making it ideal for this requirement.

Answer

Variable

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Function

Answer

If-else statement

Question 8

Which TWO of the following are examples of high-level programming languages? (Select TWO).

Accepted Answer

Python. Python and Java are both high-level programming languages because they provide strong abstraction from the computer's hardware, using human-readable syntax and automatic memory management. Python is interpreted and dynamically typed, while Java is compiled to bytecode and statically typed, but both allow developers to write code without managing registers or memory addresses directly.

Answer

Machine code

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Assembly

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Binary

Question 9

Which THREE of the following are characteristics of object-oriented programming (OOP)? (Select THREE).

Accepted Answer

Polymorphism. Polymorphism is a core OOP concept that allows objects of different classes to be treated as objects of a common superclass, with method calls resolved at runtime based on the actual object type. This enables one interface to be used for a general class of actions, with specific behavior determined by the specific object instance.

Answer

Top-down design

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Sequential execution

Question 10

Refer to the exhibit. A developer wrote this BASIC program. What will happen if the user presses Enter without typing a name?

Accepted Answer

The program will prompt for input again.. In BASIC, the INPUT statement reads a string from the user. If the user presses Enter without typing a name, the variable receives an empty string (""). The program then prints "Hello, " followed by that empty string, resulting in "Hello, " with no name. Option C is incorrect because the program does not loop or re-prompt; it simply continues with the empty string.

Answer

The program will print "Hello, " with no name.

Answer

The program will display an error message.

Answer

The program will end with no output.