Rust Programming Language MCQs (Chapterwise Multiple Choice Questions)

CORBA's DII allows a client to do which one of the following?

Generate client-side stubs for interfaces

Dynamically link with cross-platform libs

Connect with proxy objects across platforms

Discover new objects and interfaces at runtime

Answer & Explanation

Correct Answer: Discover new objects and interfaces at runtime

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How do you create a Rust project on the command-line?

Cargo new

Rustup init

Cargo start

Rust new-project

Answer & Explanation

Correct Answer: Cargo new

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Which of the following techniques can help keep system programs secure?

Encrypt every process’ executable

Setuid important processes to the root user

Limit system calls to administrators

Check all system calls for error conditions

Answer & Explanation

Correct Answer: Check all system calls for error conditions

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_ cannot be destructured.

Traits

Tuples

Enums

Structs

Answer & Explanation

Correct Answer: Traits

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What smart pointer is used to allow multiple ownership of a value in various threads?

Arc

Box

Both Arc and Rc are multithread safe.

Rc

Answer & Explanation

Correct Answer: Arc

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Race conditions are caused by which of the following conditions in a multi threaded system?

Proper program function requires all threads to run quickly

Proper program function requires that all threads run at the same speed

Proper program function is dependent on the execution sequence and timing of each thread

Answer & Explanation

Correct Answer: Proper program function is dependent on the execution sequence and timing of each thread

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Which comment syntax is not legal?

/*

#

//!

//

Answer & Explanation

Correct Answer: #

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Which of the following is the result of a process calling UNIX exec()?

A new process is created

The process becomes executable

The process is completely overwritten

The process blocks waiting for another process to run

Answer & Explanation

Correct Answer: The process is completely overwritten

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The purpose of the poll() and select() system calls is to perform which of the following functions?

Watch a set of file descriptors to see which are ready

Frequently check email and other network services

Sample system process information for use by the top command

Answer & Explanation

Correct Answer: Watch a set of file descriptors to see which are ready

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Which statement about lifetimes is false?

Lifetimes were redundantly specified in previous version of Rust.

Lifetimes are specified when a struct is holding a reference to a value.

Lifetimes are specified when certain values must outlive others.

Lifetimes are always inferred by the compiler.

Answer & Explanation

Correct Answer: Lifetimes are always inferred by the compiler.

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